WS-19 SINGLE CHANNEL WIRELESS BELTPACK

USER MANUAL

Issue March 2011 ASL Intercom BV
DESIGNED AND MANUFACTURED BY: ASL INTERCOM BV ZONNEBAAN EG UTRECHT THE NETHERLANDS PHONE: +31 (0)FAX: +31 (0)WEB: www.asl-inter.com E-MAIL: info@asl-inter.com
CONTENT OF THIS USER MANUAL
1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 INTRODUCTION... 3 UNPACKING... 3 INSTALLATION... 3 FRONT PANEL CONTROLS... 4 SIDE PANEL TRIMMERS... 4 REAR PANEL CONTROLS & CONNECTOR... 5 INTERIOR.... 5 FREQUENCY BAND & ANTENNAS.. 6 SETTING UP CONNECTIONS... 6 COMMUNICATION MODES.. 9 WARRANTY.... 10 TECHNICAL SPECIFICATIONS... 10
PAGE 2 User Manual WS 19 / March 2011 ASL Intercom BV
INTRODUCTION A maximum of 8 full duplex wireless connections can be made, simultaneously operated without any interference. The unique ASL Call system provides both a flashing red LED and a very distinctive and characteristic sound signal. A momentary push makes the red LED flash, whilst holding the button for two seconds it will activate the CALL sound signal. The volume of the sound signal (buzzer) can be adjusted at the side panel. Special attention has been paid to the intelligibility of speech. By applying low noise/high speed opamps, a speech presence filter and a specially developed amplifier, communication is very comfortable even in environments with a very high background noise level.
An ASL wireless intercom system may consist of 1-channel beltpacks (WS-19), 2-channel beltpacks (WS-29), 2-channel base stations (WS200) and 4-channel base stations (WS-400). It is a stand-alone system but may also be the wireless extension of a wired intercom system. The base stations have a built-in interface to 4wire and to 2-wire (party line) intercom. The WS-19 is a single channel wireless beltpack, housed in a strong aluminum case. The unit has a Volume (listen level) control, a TALK and a CALL button with LED indicators and one TX/RX (send/receive) module. ASL uses the 2.4 GHz frequency band for the communication between its wireless beltpacks and base stations. 2.0 UNPACKING
The shipping carton contains the parts listed below: The WS-19 User manual 6x NiMh rechargeable batteries Charger If any are missing, contact your dealer.
ASL has taken great care to ensure this product reaches you in flawless condition. After unpacking the unit, please inspect for any physical damage. Retain the shipping carton and relevant packing materials in case the unit needs to be returned. If any damage has occurred, please notify your dealer immediately so that a written claim can be initiated. Please also refer to the warranty section of this manual.
INSTALLATION Adjust the channel select switch to match the selected channel on the installed base station (a WS-200 or a WS-400). After switching on the WS19 with the power switch at the rear panel, the unit should have contact with the base station. To check this, push a CALL or TALK button. The green LED RX active and the red LED 1 ch. Beltpack of the corresponding TX/RX module in the base station should now be lit. See also section 9.0 (Setting up Connections) and section 10.0 (Communication Modes)
The supplied rechargeable batteries are empty, insert them in the beltpack and charge them before use. For charging instructions see section 6.0 / #13 The WS-19 is used in an existing or new wireless intercom system. The necessary DC voltages are derived from the internal batteries (see section 7.0 / #16).

PAGE 3 User Manual WS 19 / March 2011 ASL Intercom BV

FRONT PANEL CONTROLS

For the TALK button to function, the unit must stay in reach of the base station. If not, the TALK button switches off (the Talk LED extinguishes). As soon as the beltpack is in reach of the base station again, the Talk functions are restored automatically. 3 CALL button This push button activates the call system. A momentary push sends a call signal to all wired/ wireless intercom stations connected to this beltpack (see section 9) and the Call LED starts flashing. Pushing the button for 2 seconds activates the CALL buzzer. After the CALL button is released the call LED continues to flash for a further 2 seconds. To send or receive a CALL signal, the beltpack must be in reach of the base station. Call LED (red) Talk LED (green)
VOLUME control knob This knob adjusts the listen level for the headset. TALK button This push button activates the headset microphone; the green Talk LED indicates the microphone is switched on. One talks to the wired and wireless intercom stations which are connected to this beltpack (see section 9).

SIDE PANEL TRIMMERS

OWN VOICE trimmer This trimmer adjusts the level of your own voice as you hear it in your headset. Adjusting this signal does not affect the level of your voice as heard by other wireless or wired intercom stations (see section 9) BUZZER VOLUME trimmer This trimmer adjusts the volume of the internal buzzer. The buzzer is activated by pushing the CALL button of the WS-19, or the CALL button of any other wired and/or wireless intercom station connected to this beltpack (see section 9) for longer than 2 seconds. MIC GAIN trimmer With this trimmer, the mic gain can be adjusted. To increase mic gain turn trimmer clockwise. To decrease mic gain turn trimmer counterclockwise
TONE VOLUME trimmer This trimmer adjusts the level of the tones which the WS-19 generates in case of a low battery warning and at start up.
PAGE 4 User Manual WS 19 / March 2011 ASL Intercom BV
REAR PANEL CONTROLS & CONNECTOR 13 ASL CHARGER connector To this connector the ASL charger unit is connected. On the charger unit two LEDs indicate the charging process. The red LED is lit during charging, the green LED is lit when the batteries are full. Before starting the charging process, make sure that the beltpack is switched off (see #11) and check whether the batteries inside the beltpack are indeed of the rechargeable NiMh type. Trying to charge non-rechargeable batteries causes leakage of these batteries, resulting in serious and in most cases not repairable damage to the electronics of the beltpack. Use only the by ASL supplied battery charger. Never try to use any other adapter or charger unit. 14 HEADSET connector To this XLR-4 connector a headset can be connected. The headset can must have an impedance of minimum 200 ohms. If there are 2 cans in parallel, each can must have an impedance of minimum 400 ohms. The headset mic may be dynamic or electret.

10 Antenna This small antenna is very flexible and nonremovable. For optimum performance keep the antenna clear from obstacles. 11 POWER on/off switch With this switch the battery power of the WS19 is switched on and off. 12 CHANNEL SELECT switch With this switch the TX/RX channel (see section 8) is selected on which the beltpack communicates with the base station. There is a choice out of 8 TX/RX channels. The selected TX/RX channel must match the selected TX/RX channel at one of the TX/RX modules in the base station.

INTERIOR

16 Battery Compartment This compartment holds 6 penlight batteries of the AA type. The supplied NiMH batteries are to be preferred for maximum duration. The WS 19 uses a high discharge current which the batteries need to sustain over their lifespan. Batteries which only supply a high current for a short time will be exhausted very quickly. When the batteries reach the end of their capacity, the beltpack gives a warning signal (4 tones). The interval of the tones shorten when the batteries wear out. 17 Dipswitch, to set function: A: Talk function only momentary B: Talk function disabled C: Buzzer function disabled D: Battery save mode (transmit power decreases) To turn on a switch, slide towards side panel.
PAGE 5 User Manual WS 19 / March 2011 ASL Intercom BV
18 Service connector For factory service only.

8.0 8.1

FREQUENCY BAND & ANTENNAS Frequencies o The antennas of a base station should have as much as possible a line of sight to the antennas of the beltpack(s). All objects within that path make the connection less reliable. Due to reflections of the HF signal, one might experience a dropout on a specific spot in a building; moving a beltpack only a few inches can be enough to solve the problem. Because of the use of the WLAN frequencies, ASLs wireless units might experience interference from units like mobile telephones with bluetooth and computers with bluetooth or WLAN cards. Try to change TX/RX channels if you experience problems with these. Antenna Wiring (Base Stations)
ASLs wireless intercom uses the 2.4 GHz band, which is freely available for WLAN (Wireless Local Area Networks). The ASL system divides the available bandwidth into 16 overlapping sections, 8 of them being used as upload frequency (from the beltpack to the base station) and the other 8 being used as download frequency (from the base station to the beltpack). With the channel select switches on both base stations and wireless beltpacks one actually selects an upload/download pair, called a TX/RX channel. Each TX/RX channel serves one dedicated wireless connection between base stations and wireless beltpacks (in fact between the TX/RX modules in those units). It is possible to have several WS 19 beltpacks on the same TX/RX channel, see section 10.2 Half Duplex. When using the ASL wireless system, the following should be taken into account: o The 2,4 GHz frequency is known to have difficulty in penetrating concrete walls, steel walls and other obstructions. Behind obstructions like these an HF shadow may occur where no communication is possible.

If the antennas of a base station are not supposed to be directly connected to its front panel, a cable between base station and antenna is needed (base stations are equipped with SMA connectors - female at the base station and male at the antenna). The 2.4GHz frequency experiences a big loss in any cable, e.g. a RG58 cable has a loss of 1 dB per meter. So make sure that your cable (50 ohms) is suited for 2.4 GHz and that the cable is as short as possible. Make the cables in lengths of a multiple of 12, e.g. lengths of 24cm, 48cm, 120cm, 240cm etc.

9.0 9.1. 9.1.1

SETTING UP CONNECTIONS ASL WIRELESS AS A STAND ALONE SYSTEM Base Station Settings b. Make sure the interface mode switch at the rear of the base station is set to PARTY LINE. The internal party line is now linking the on board TX/RX modules to each other. c. Turn down the side tone trimmers at the TX/RX modules (counter clockwise)
a. Give each TX/RX module in the base station its own TX/RX channel by rotating the Channel select switch. Try to avoid TX/RX channels to be physically next to each other, e.g. when two WS-400s are in your wireless system, try to set them in this order: TX/RX channels 2, 4, 6, 8, 1, 3, 5, 7. If one uses a WS-200 with only two beltpacks, use TX/RX channels 1 and 6
PAGE 6 User Manual WS 19 / March 2011 ASL Intercom BV
Wireless Beltpack Settings
d. With the Channel Select switch at the rear of the beltpack, select the TX/RX channel according to the WS-200 or WS 400 setting. e. Connect a headset to the beltpack and insert fully charged batteries. When the beltpack is switched on, a single short tone should be heard and both LEDs on the front panel of the unit flash for half a second. This indicates that the beltpack is functioning properly. f. When one pushes the CALL or the TALK button, the LEDs on the front panel are lit and the green LED of corresponding TX/RX module in the base station is lit. It proofs the beltpack has connection with the base station. 9.2. 9.2.1
g. Turn down the OWN VOICE Volume trimmer at the side panel of the beltpack (counter-clockwise) h. Set the volume control of the beltpack at approximately 50% i. Push the TALK button on the beltpack, talk into the microphone and listen to your own voice (you might hear a small delay in the signal) j. Adjust the side tone trimmer at the referring TX/RX module in the base station so that the level of your own voice is as low as possible k. Adjust the OWN VOICE trimmer on the beltpack so that the level of your own voice is to your liking.
ASL WIRELESS CONNECTED TO A 4-WIRE INTERCOM SYSTEM Base Station Settings b. Make sure the interface mode switch at the rear of the base station is set to 4-WIRE c. Connect the 4-wire intercom system via the XLR-3 connectors at the rear panel of the base station. Each XLR-3 male connector (signal out) and female connector (signal in) connects each TX/RX module to an input/output of the a 4-wire intercom system. The internal party line is now disconnected.

a. Give each TX/RX module in the base station its own TX/RX channel by rotating the Channel select switch. Try to avoid TX/RX channels to be physically next to each other, e.g. when two WS-400s are in your wireless system, try to set them in this order: TX/RX channels 2, 4, 6, 8, 1, 3, 5, 7. If one uses a WS-200 with only two beltpacks, use TX/RX channels 1 and 6 9.2.2 Wireless Beltpack Settings
d. With the Channel Select switch at the rear of the beltpack, select the TX/RX channel according to the WS-200 or WS-400 setting. e. Connect a headset to the beltpack and insert fully charged batteries. When the beltpack is switched on, a single short tone should be heard and both LEDs on the front panel of the unit flash for half a second. This indicates that the beltpack is functioning properly. f. When one pushes the CALL or TALK button, the LEDs on the front panel are lit and the green LED of the corresponding TX/RX module in the base station is lit. It proofs the beltpack has connection with the base station.
g. Turn down the OWN VOICE Volume trimmer at the side panel of the beltpack (counter-clockwise) h. Push the TALK button on the beltpack, talk into the microphone and listen to your own voice i. Turn up the volume of your own voice by adjusting the OWN VOICE trimmer to a level that you like
PAGE 7 User Manual WS 19 / March 2011 ASL Intercom BV

9.3. 9.3.1

ASL WIRELESS CONNECTED TO A PARTY LINE INTERCOM SYSTEM Base Station Settings b. Make sure the interface mode switch at the rear of the base station is set to PARTY LINE. c. Connect the party line intercom system via the XLR-3 connectors at the rear panel of the base station. Each XLR-3 male and female pair may connect each TX/RX module to a channel of the party line intercom system (see also section 9.3.3). Everywhere this connection is made, the internal party line is interrupted. d. Turn down the side tone trimmers (counter clockwise).
e. With the Channel Select switch at the rear of the beltpack, select the TX/RX channel according to the WS-200 or WS-400 setting. f. Connect a headset to the beltpack and insert fully charged batteries. When the beltpack is switched on, a single short tone should be heard and both LEDs on the front panel of the unit flash for half a second. This indicates that the beltpack is functioning properly. g. When one pushes the CALL or TALK button, the LEDs on the front panel are lit and the green LED of corresponding TX/RX module of the base station is lit. It proofs the beltpack has connection with the base station. 9.3.3

h. Turn down the OWN VOICE Volume trimmer at the side panel of the beltpack (counter-clockwise) i. Set the volume control of the beltpack at approximately 50% j. Push the TALK button on the beltpack, talk into the microphone and listen to your own voice (you might hear a small delay in the signal) k. Adjust the side tone trimmer of the referring TX/RX module in the base station so that the level of your own voice is as low as possible l. Adjust the OWN VOICE trimmer on the beltpack so that the level of your own voice is to your liking
Wiring configurations when connecting to a party line intercom system
Connecting to party lines can be done in many different ways. Below a few examples:
Example 1: When two WS-400 base stations are installed and 8x WS-19 beltpacks are available: The drawing shows how to connect all WS-19 beltpacks to the same party line.
PAGE 8 User Manual WS 19 / March 2011 ASL Intercom BV
Example 2: When two WS-400 base stations are installed and 8x WS-19 beltpacks are available: The drawing shows how to connect WS-19 #1 and #2 to party line 1, WS-19 #3 and #4 to party line 2 and WS-19 #5, #6, #7 and #8 to party line 3.
Example 3: When two WS-400 base stations are installed and 8x WS-29 beltpacks are available: The drawing shows how to connect the channels A of WS-29 #1, #2, #3 and #4 to party line 1, the channels B of WS-29 #1, #2, #3 and #4 to party line 2, the channels A of WS-29 #5, #6, #7 and #8 to party line 3 and the channels B of WS-29 #5, #6, #7 and #8 to party line 4.
For more information about the audio routing when WS-29 beltpacks are used, see the WS-200 or WS-400 user manual, section Automatic Audio Routing
COMMUNICATION MODES Each wireless beltpack needs to be assigned to a unique TX/RX channel. If another TX/RX module is set to the same TX/RX channel the communication is garbled and the connection does not function properly. A TX/RX module in a base station automatically senses whether a WS-19 or a WS-29 beltpack is assigned and automatically selects the right audio routing for either beltpack type. For more information, see section Automatic Audio Routing in the WS-200 or the WS-400 user manual.
The system is designed to offer a maximum of 8 full duplex wireless connections, simultaneously operated without any interference. A wireless beltpack may be the WS-19 or the WS-29, both containing one TX/RX module. A base station may be the WS-200 containing two TX/RX modules, or the WS-400 containing four TX/RX modules. When in the same space more than one base station is required, these stations have to be interconnected by WS Link Cables (an ASL accessory). A link cable contains all signals which have to be interchanged between base stations. See the WS-200 or WS-400 user manual

Full Duplex Mode (for WS-19 and WS-29 beltpacks) Such a TX/RX channel links the TX/RX module in a wireless beltpack to one of the TX/RX modules in the base station.
A full duplex wireless connection is accomplished by using a dedicated TX/RX channel, selected on the beltpack and on the base station.
PAGE 9 User Manual WS 19 / March 2011 ASL Intercom BV
Half Duplex Mode (for WS-19 single channel beltpacks only). The side tone prevents (when properly adjusted) the microphone signal coming from the talking beltpack to return to the beltpacks. The listening beltpacks do not hear the talking beltpack. To solve this, the side tone trimmer of the concerning TX/RX module should be turned down (fully counter clockwise). But there is a drawback: the user of the talking beltpack will hear his own voice with a delay of 24 msec and via the OWN VOICE link in the beltpack (no delay). The effect of hearing your own voice twice (with and without delay) can be diminished by turning down the OWN VOICE trimmer. The listening beltpacks will not notice the delay.
This mode allows more than one WS-19 beltpacks on the same TX/RX channel. However, only one of the WS-19 beltpacks can talk at a time and have a full duplex connection. For as long as one of the beltpacks has a full duplex connection (talk, listen and call), the other beltpacks are able to listen to the signals coming from the base station, but are not able to call or talk. In case of half duplex use of WS-19 beltpacks whilst the corresponding TX/RX module in the base station is connected to a wired party line intercom system, the following has to be taken into account: 11.0 WARRANTY
ASL Intercom warrants this unit to the original end-user purchaser against defects in workmanship and materials in its manufacture for a period of two years from date of shipment to the end-user.
Faults arising from misuse, unauthorized modifications or accidents are not covered by this warranty. If the unit is faulty, it should be sent in it's original packing to the supplier or your local ASL dealer, with shipping prepaid. A note must be included stating the faults found and a copy of the original suppliers invoice.
TECHNICAL SPECIFICATIONS Buzzer max. SPL: 65 dBA WS-19 Dimensions & Weight width: 88 mm height: 49 mm depth: 141 mm weight: 650 grams System Specifications transceiver frequency: 2400 2483.5 MHz transmit power: 10 mW E.I.R.P. number of channels: 8 channel separation: 7 MHz dynamic range: 70 dB supply voltage: +7.2 V DC (4.2 V to 9 V) audio freq. response: 200 Hz-12 kHz (-3dB)

WS-19 Power Consumption Current (at 9 V DC): 200 mA quiescent 240 mA signaling 260 mA at max. output + signaling Mic. Pre-amp mic. impedance: 200 ohms gain: 40 dB - 70 dB presence filter: +6 dB at 5 kHz V electret mic: +4.5V DC Headphones Driver Amp max. load: 200 ohms max. output level: 6.8 Vrms @ 200 max. output power: 0.23 Wrms @ 200
0 dBu is defined as 775 mV into open circuit ASL reserves the right to alter specifications without prior notice.
PAGE 10 User Manual WS 19 / March 2011 ASL Intercom BV

WS-400 BASE STATION FOR WIRELESS INTERCOM WITH FOUR TX/RX MODULES

USER MANUAL

Issue February 2011 ASL Intercom BV
DESIGNED AND MANUFACTURED BY: ASL INTERCOM BV ZONNEBAAN EG UTRECHT THE NETHERLANDS PHONE: +31 (0)FAX: +31 (0)30 2667373
WEB: www.asl-inter.com E-MAIL: info@asl-inter.com
CONTENT OF THIS USER MANUAL
1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 INTRODUCTION.. 3 UNPACKING.. 3 INSTALLATION.. 3 WARRANTY. 3 FRONT PANEL CONTROLS. 4 REAR PANEL CONTROLS & CONNECTORS. 4 AUTOMATIC AUDIO ROUTING.. 5 THE INTERFACE TO WIRED INTERCOM. 6 FREQUENCY BAND & ANTENNAS. 6 SETTING UP CONNECTIONS.. 6 COMMMUNICATION MODES.. 9 TECHNICAL SPECIFICATIONS WS 400.. 9
PAGE 2 User Manual WS-400 / February 2011 ASL Intercom BV.
INTRODUCTION In case in the same space more than one base station is required, these stations have to be interconnected by WS Link Cables (an ASL accessory product). A link cable contains all signals which have to be interchanged between base stations and are connected to the Sub-D Link connector on the rear panels. A wireless beltpack (the WS-19 as well as the WS29) contains one TX/RX module. Each beltpack needs to be assigned to a unique TX/RX channel. If another TX/RX module is set to the same TX/RX channel communication is garbled or not possible at all. A TX/RX module in a base station automatically senses whether a WS-19 or a WS-29 beltpack is assigned. The on-board micro processor routes the audio as required for either beltpack type. See section 7 Automatic Audio Routing.
The WS-400 is designed to be the base station for wireless beltpacks WS-19 (single channel) or WS29 (dual channel). It contains four transmit/receive (TX/RX) modules and is housed in a strong steel 19 /1RU case. On the front panel of the WS-400 are various TX/RX controls and the antenna connectors. Via XLR-3 connectors on the rear panel the TX/RX modules in the WS-400 can be linked to either a party line or a 4-wire intercom system. ASL uses the 2.4 GHz frequency band for the communication between its wireless beltpacks and base stations. A maximum of 8 full duplex wireless connections can be made, simultaneously operated without any interference. For 8 connections are needed either 2x WS-400, or 1x WS-400 + 2x WS200, or 4x WS200. (The WS-200 base station contains two TX/RX modules).
UNPACKING ASL has taken great care to ensure this product reaches you in flawless condition. After unpacking the unit please inspect for any physical damage to the unit, and retain the shipping carton and relevant packing materials for use should the unit need returning. If any damage has occurred, please notify your dealer immediately so that a written claim can be initiated. Please also refer to the warranty section of this manual.
The shipping carton contains the parts listed below: o The WS-400 o User manual o Four antennas o Power cord o Spare fuses If any are missing, contact your dealer.
INSTALLATION Switch the WS-400 on with the power switch at the rear panel and adjust the channel select switch of one of the TX/RX modules to match the selected TX/RX channel on one of your wireless beltpacks. The WS-400 should now have contact with this beltpack. To check this, push the CALL or TALK button on the beltpack and the green LED of the corresponding TX/RX module in the WS-400 should be lit. See also section 10 Setting up Connections and section 11 Communication Modes

The unit has to be connected to a mains outlet (90 - 240 V AC, 50/60 Hz). IMPORTANT NOTICE: The green/yellow wire of the power cord must always be connected to the electrical installation safety earth or ground. This is essential for personal safety as well as for proper functioning of the WS-400
WARRANTY If the unit is faulty it should be sent in its original packing, to the supplier or your local ASL dealer, with shipping prepaid. A note must be included stating the faults found and a copy of the original suppliers invoice.
This unit is warranted by ASL Intercom to the original end-user purchaser against defects in workmanship and materials in its manufacture for a period of one year from date of shipment to the enduser. Faults arising from misuse, unauthorized modifications or accidents are not covered by this warranty.
PAGE 3 User Manual WS-400 / February 2011 ASL Intercom BV.

FRONT PANEL CONTROLS

RX active LED This LED will be lit when the RX/TX Unit receives data from an active beltpack (Talk and/or Call). When a beltpack is only listening it will not be lit. Audio Routing LED indicators Indicate the audio routing for either a WS-19 single channel beltpack or a WS-29 dual channel beltpack. See section 7.0 Automatic Audio Routing SIDE TONE trimmer This trimmer adjusts the level of your own voice as you hear it in the headset which is connected to your wireless beltpack. The operating area is between fully clockwise and minimum level. 4
Adjusting the side tone does not affect the level of your voice as it is heard by other stations. For adjustment procedure, see section 10 Setting up Connections Channel Select switch With this switch the TX/RX channel is selected on which the base station communicates with the beltpack. There is a choice out of 8 TX/RX channels. The selected TX/RX channel must match the TX/RX channel which is selected on the beltpack. See also section 9.1 Frequencies. ANTENNA connector On this connector the supplied antennas are to be connected.
REAR PANEL CONTROLS & CONNECTORS
On the WS-400 rear panel are the controls & connectors of channel A, B, C and D. The drawing shows the controls & connectors of only channel A and B. 6 INTERFACE MODE switch This switch determines the mode of the audio interface and the function of the XLR connectors #9 and #10. See section 8 The Interface to Wired Intercom OUTPUT LEVEL trimmer This trimmer adjusts the output level of the audio signal that comes from the beltpack. INPUT LEVEL trimmer This trimmer adjusts the input level of the audio signal that is sent to the wireless beltpack. OUTPUT connector This male XLR-3 connector is for connecting either party line wired intercom or 4-wire intercom. See section 8 The Interface to Wired Intercom. 10 INPUT connector This female XLR-3 connector is for connecting either party line wired intercom or 4-wire intercom. See section 8 The Interface to Wired Intercom. LINK connector This Sub-D connector contains all signals that need to be interchanged when two or more base stations are to be used in the same space. Only use the special WS link cable supplied by ASL. MAINS switch With this switch the WS-200 can be switched on or off. MAINS connector with fuse holder This mains input accepts V AC, Hz. The fuse in the fuse holder needs to be 1.25 Amp of the slow blow type. The bottom part contains a spare fuse.

PAGE 4 User Manual WS-400 / February 2011 ASL Intercom BV.

AUTOMATIC AUDIO ROUTING

To a TX/RX module in the WS 400 one can assign either a WS-19 single channel beltpack or a WS-29 dual channel beltpack. The on-board micro processor automatically detects either beltpack type and routes the audio as follows:
Section of WS-400 front panel
Section of WS-400 rear panel
When a WS-19 beltpack is assigned to the TX/RX-1 module, the front panel top LED (labeled 1-ch beltpack) is lit. The audio to/from this beltpack is routed from/to the rear panel XLR-3 connectors Channel A. When a WS-19 beltpack is assigned to the TX/RX-2 module, the front panel top LED (labeled 1-ch beltpack) is lit. The audio to/from this beltpack is routed from/to the rear panel XLR-3 connectors Channel B. When a WS-19 beltpack is assigned to the TX/RX-3 module, the front panel top LED (labeled 1-ch beltpack) is lit. The audio to/from this beltpack is routed from/to the rear panel XLR-3 connectors Channel C. When a WS-19 beltpack is assigned to the TX/RX-4 module, the front panel top LED (labeled 1-ch beltpack) is lit. The audio to/from this beltpack is routed from/to the rear panel XLR-3 connectors Channel D.
When a WS-29 beltpack is assigned to the TX/RX-1 or the TX/RX-2 module, the front panel middle LED (labeled 2-ch beltpack) is lit. The audio from/to channel A of this beltpack is routed to/from the rear panel XLR-3 connectors Channel A and the audio from/to channel B of this beltpack is routed to/from the rear panel XLR-3 connectors Channel B. o When a WS-29 beltpack is assigned to the TX/RX-3 or the TX/RX-4 module, the front panel middle LED (labeled 2-ch beltpack) is lit. The audio from/to channel A of this beltpack is routed to/from the rear panel XLR-3 connectors Channel C and the audio from/to channel B of this beltpack is routed to/from the rear panel XLR-3 connectors Channel D.
PAGE 5 User Manual WS-400 / February 2011 ASL Intercom BV.
THE INTERFACE TO WIRED INTERCOM
Each TX/RX module in the WS-400 contains an interface to wired intercom. The interface can be put in Party Line Mode or in 4-Wire Mode, using the Interface Mode Switch on the rear panel. Party Line Mode (the Mode switch is not pushed): The XLR-3 male connector (#9) and the XLR-3 female connector (#10) on the rear panel are now party line connectors for daisy chain wiring purposes. The audio is sent from the wireless beltpack to the party line of the wired intercom system and from this system to the wireless beltpack. In this mode the base station also handles all CALL functions to and from the party line intercom and MIC MUTE functions from the party line intercom. 9.0 FREQUENCY BAND & ANTENNAS 4-Wire Mode (the Mode switch is pushed): The XLR-3 male connector (#9) and the XLR-3 female connector (#10) on the rear panel are now 4-wire connectors The female connector is the electronically balanced input connector for audio from the 4-wire intercom system to the wireless beltpack. The male connector outputs the audio signal from the wireless beltpack to the 4-wire intercom system as an electronically balanced signal.

9.1 Frequencies ASLs wireless intercom uses the 2.4 GHz band, which is freely available for WLAN (Wireless Local Area Networks). The ASL system divides the available bandwidth into 16 overlapping sections, 8 of them being used as upload frequency (from the beltpack to the base station) and the other 8 being used as download frequency (from the base station to the beltpack). With the channel select switches on base stations and wireless beltpacks one actually selects an upload / download pair, called a TX/RX channel. Each TX/RX channel serves one dedicated wireless connection between base stations and wireless beltpacks (in fact between the TX/RX modules in those units). It is possible to have several WS 19 beltpacks on the same TX/RX channel, see section 10.2 Half Duplex. When using the ASL wireless system, the following should be taken into account: o The 2,4 GHz frequency is known to have difficulty in penetrating concrete walls, steel walls and other obstructions. Behind obstructions like these an HF shadow may occur where no communication is possible.
The antennas of a base station should have as much as possible a line of sight to the antennas of the beltpack(s). All objects within that path make the connection less reliable. Due to reflections of the HF signal, one might experience a dropout on a specific spot in a building; moving a beltpack only a few inches can be enough to solve the problem. Because of the use of the WLAN frequencies, ASLs wireless units might experience interference from units like mobile telephones with bluetooth and computers with bluetooth or WLAN cards. Try to change TX/RX channels if you experience problems with these.
9.2 Antenna Wiring (Base Stations) If the antennas of a base station are not supposed to be directly connected to its front panel, a cable between base station and antenna is needed (base stations are equipped with SMA connectors - female at the base station and male at the antenna). The 2.4GHz frequency experiences a big loss in any cable, e.g. a RG58 cable has a loss of 1 dB per meter. So make sure that your cable (50 ohms) is suited for 2.4 GHz and that the cable is as short as possible. Make the cables in lengths of a multiple of 12, e.g. lengths of 24cm, 48cm, 120cm, 240cm etc.

10.0 SETTING UP CONNECTIONS 10.1. ASL WIRELESS AS A STAND ALONE SYSTEM
10.1.1 Base Station Settings a. Give each TX/RX module in the base station its own TX/RX channel by rotating the Channel select switch. Try to avoid TX/RX channels to be physically next to each other, e.g. when two WS-400s are in your wireless system, try to set them in this order: TX/RX channels 2, 4, 6, 8, 1, 3, 5, 7. If one uses a WS-200 with only two beltpacks, use TX/RX channels 1 and 6 b. Make sure the interface mode switch at the rear of the base station is set to PARTY LINE. The internal party line is now linking the on board TX/RX modules to each other. c. Turn down the side tone trimmers at the TX/RX modules (counter clockwise)
PAGE 6 User Manual WS-400 / February 2011 ASL Intercom BV.
10.1.2 Wireless Beltpack Settings d. With the Channel Select switch at the rear of the beltpack, select the TX/RX channel according to the WS-200 or WS-400 setting e. Connect a headset to the beltpack and insert fully charged batteries. When the beltpack is switched on, a single short tone should be heard and both LEDs on the front panel of the unit flash for half a second. This indicates that the beltpack is functioning properly. f. When one pushes the CALL or the TALK button, the LEDs on the front panel are lit and the green LED of the corresponding TX/RX module in the base station is lit. It proofs the beltpack has connection with the base station g. Turn down the OWN VOICE Volume trimmer at the side panel of the beltpack (counterclockwise) h. Set the volume control of the beltpack at approximately 50% i. Push the TALK button on the beltpack, talk into the headset microphone and listen to your own voice (you might hear a small delay ) j. Adjust the side tone trimmer at the referring TX/RX module in the base station so that the level of your own voice is as low as possible k. Adjust the OWN VOICE trimmer on the beltpack so that the level of your own voice is to your liking.
ASL WIRELESS CONNECTED TO A 4-WIRE INTERCOM SYSTEM
10.2.1 Base Station Settings a. Give each TX/RX module in the base station its own TX/RX channel by rotating the Channel select switch. Try to avoid TX/RX channels to be physically next to each other, e.g. when two WS-400s are in your wireless system, try to set them in this order: TX/RX channels 2, 4, 6, 8, 1, 3, 5, 7. If one uses a WS-200 with only two beltpacks, use TX/RX channels 1 and 6 10.2.2 Wireless Beltpack Settings d. With the Channel Select switch at the rear of the beltpack, select the TX/RX channel according to the WS-200 or WS-400 setting. e. Connect a headset to the beltpack and insert fully charged batteries. When the beltpack is switched on, a single short tone should be heard and both LEDs on the front panel of the unit flash for half a second. This indicates that the beltpack is functioning properly. f. When one pushes the CALL or TALK button, the LEDs on the front panel are lit and the green LED of the corresponding TX/RX module in the base station is lit. 10.3 It proofs the beltpack has connection with the base station. g. Turn down the OWN VOICE Volume trimmer at the side panel of the beltpack (counterclockwise) h. Push the TALK button on the beltpack, talk into the headset microphone and listen to your own voice i. Turn up the volume of your own voice by adjusting the OWN VOICE trimmer to a level of your liking b. Make sure the interface mode switch at the rear of the base station is set to 4-WIRE The internal party line is now disconnected. c. Connect the 4-wire intercom system via the XLR-3 connectors at the rear panel of the base station. Each XLR-3 male connector (signal out) and female connector (signal in) connects each TX/RX module to an input/output of the a 4-wire intercom system.

ASL WIRELESS CONNECTED TO A PARTY LINE INTERCOM SYSTEM
10.3.1 Base Station Settings a. Give each TX/RX module in the base station its own TX/RX channel by rotating the Channel select switch. Try to avoid TX/RX channels to be physically next to each other, e.g. when two WS-400s are in your wireless system, try to set them in this order: TX/RX channels 2, 4, 6, 8, 1, 3, 5, 7. If one uses a WS-200 with only two beltpacks, use TX/RX channels 1 and 6 b. Make sure the interface mode switch at the rear of the base station is set to PARTY LINE. c. Connect the party line intercom system via the XLR-3 connectors at the rear panel of the base station. Each XLR-3 male and female pair may connect each TX/RX module to a channel of the party line intercom system (see also section 10.3.3). Everywhere this connection is made, the internal party line is interrupted d. Turn down the side tone trimmers (counter clockwise).
PAGE 7 User Manual WS-400 / February 2011 ASL Intercom BV.
10.3.2 Wireless Beltpack Settings e. With the Channel Select switch at the rear of the beltpack, select the TX/RX channel according to the WS-200 or WS-400 setting f. Connect a headset to the beltpack and insert fully charged batteries. When the beltpack is switched on, a single short tone should be heard and both LEDs on the front panel of the unit flash for half a second. This indicates the beltpack is functioning properly g. When one pushes the CALL or TALK button, the LEDs on the front panel are lit and the green LED of corresponding TX/RX module of the base station is lit. It proofs the beltpack has connection with the base station h. Turn down the OWN VOICE Volume trimmer at the side panel of the beltpack (counter-clockwise) i. Set the volume control of the beltpack at approximately 50% j. Push the TALK button on the beltpack, talk into the headset microphone and listen to your own voice (you might hear a small delay in the signal) k. Adjust the side tone trimmer of the referring TX/RX module in the base station so that the level of your own voice is as low as possible l. Adjust the OWN VOICE trimmer on the beltpack so that the level of your own voice is to your liking.
10.3.3 Wiring Configurations when connecting to party line intercom systems Connecting to party lines can be done in many different ways. Below a few examples:
Example 1: When two WS-400 base stations are installed and 8x WS-19 single channel beltpacks are available: The drawing shows how to connect all WS-19s to the same party line.
Example 2: When two WS-400 base stations are installed and 8x WS-19 single channel beltpacks are available: The drawing shows how to connect WS-19 #1 and #2 to party line 1, WS-19 #3 and #4 to party line 2, WS-19 #5 and #6 to party line 3 and WS-19 #7 and #8 to party line 4.

Example 3: When two WS-400 base stations are installed and 8x WS-29 dual channel beltpacks are available: The drawing shows how to connect channel A of all WS-29s to party line 1 and channel B of all WS 29s to party line 2.
For connecting base station TX/RX modules via their XLR-3 male and female connectors on the rear panels (see drawings above) , use short microphone cables.
PAGE 8 User Manual WS-400 / February 2011 ASL Intercom BV.

11.0 11.1

COMMMUNICATION MODES Full Duplex Mode (for WS-19 and WS-29 beltpacks) Such a TX/RX channel links the TX/RX module in a wireless beltpack to one of the TX/RX modules in the base station.
A full duplex wireless connection is accomplished by using a dedicated TX/RX channel, selected on the beltpack and on the base station. 11.2
Half Duplex Mode (for WS-19 single channel beltpacks only). The side tone prevents (when properly adjusted) the microphone signal coming from the talking beltpack to return to the beltpacks. The listening beltpacks do not hear the talking beltpack. To solve this, the side tone trimmer of the concerning TX/RX module should be turned down (fully counter clockwise). But there is a drawback: the user of the talking beltpack will hear his own voice with a delay of 24 msec and via the OWN VOICE link in the beltpack (no delay). The effect of hearing your own voice twice (with and without delay) can be diminished by turning down the OWN VOICE trimmer. The listening beltpacks will not notice the delay.
This mode allows more than one WS-19 beltpacks on the same TX/RX channel. However, only one of the WS 19 beltpacks can talk at a time and have a full duplex connection. For as long as one of the beltpacks has a full duplex connection (talk, listen and call), the other beltpacks are able to listen to the signals coming from the base station, but are not able to call or talk. In case of half duplex use of WS-19 beltpacks whilst the corresponding TX/RX module in the base station is connected to a wired party line intercom system, the following has to be taken into account: 12.0 TECHNICAL SPECIFICATIONS WS 400 Mains Mains power: 90 - 40 V AC, 50/60 Hz Fuse: 1250 mA T Power Consumption: max. 25 Watt Input Amplifiers (4-wire mode) input impedance: min. 10 kOhm input level: +12 to -20 dBu Output Amplifiers (4-wire mode) output impedance: < 25 ohms maximum load: 600 ohms max. output level: +12 to -20 dBu Intercom Line Drivers (party line mode) Output current: max. 1 mA rms output impedance: > 150 Kohm audio line level: -18 dBu (max. 0 dBu) signal-to-noise: 70 dB station bridging impedance: >150 kOhm
Side Tone Rejection: better than 20 dB WS 400 Dimensions & Weight width 483 mm height 44 mm depth 165 mm weight 2350 grams System Specifications transceiver frequency: 2400 2483.5 MHz transmit Power: 10 mW E.I.R.P. number of channels: 8 channel separation: 7 MHz audio freq. response: 200 Hz - 12 kHz (-3 dB) dynamic range: 70 dB

Note : 0dBu = 775 mV into open circuit
ASL reserves the right to alter specifications without prior notice.
PAGE 9 User Manual WS-400 / February 2011 ASL Intercom BV.