the Modem. The EDMAC channel may also be used to convey M&C data to a Transceiver at the distant end of a satellite link, if it is connected to a CDM-625. Additionally, the CDM-625 incorporates an FSK serial link that can be activated on the Tx-IF port for the purpose of communicating with an FSK capable smart BUC. This link is designed to be compatible with the Global VSAT Forum/ND-Satcom specification. In this manner, a user may monitor, configure, and control the BUC using the front panel display and keypad of the modem or the modems remote control interface. The EDMAC channel can be used to convey M&C interface to a BUC at the distant end of a satellite link if it is connected to a CDM-625.

New in this Release

Version 1.4.3 firmware adds the following features: Port-specific Pause Frame Flow Control; Remote Control Query ODS? for determining Outdoor Unit link state; FSK support for MPOD/LPOD Outdoor Units/Block Up Converters.
Version 1.4.2 firmware adds the following features: Tx X.21 Extensions; Demo Mode now available for up to 30 days (2592000 seconds).

Prior Release Updates

Version 1.4.1 firmware adds the following feature: L-Band range 950-2000 MHz. Version 1.4.0 firmware adds the following features: VersaFEC ACM (IP mode only) Supports symbol rate from 37 ksps to 4.1 Msps (requires VersaFEC module and appropriate FAST code see Chapter 17. ADAPTIVE CODING AND MODULATION (ACM) for more information); VLAN; QoS priority; MAC Learning; Tx Filter Rolloff factor (Tx Alpha = 0.25 in addition to existing 0.35); Fractional (Backup) License for Carrier-in-Carrier (requires appropriate FAST code).

1.5 1.5.1

Summary of Specifications Modulator
BPSK, QPSK, OQPSK, 8-PSK, 8-QAM and 16-QAM 18 ksps to 12.5 Msps 18 kbps - 25 Mbps. See Section 1.5.- 180 MHz (BNC connector) AND 950 - 1950 MHz (Type N connector), 100 Hz resolution Note: Firmware Ver. 1.4.1 and later increases L-Band range to 950 - 2000 MHz. -8 o o Stability 0.06 ppm (6 x 10 ) 0 to 50 C (32 to 122 F), when using internal reference Open Network, per Intelsat IESS-308/309/310/314 (IDR, IBS/SMS) E1/T1 Drop and Insert Transparent, Closed Network, IESS-315 (VSAT Turbo) Proprietary EDMAC framed mode: * 5% overhead EDMAC (data rates < 2.048 Mbps all modes except BPSK Turbo, Rate 21/44 QPSK Turbo) * 1.6% overhead - EDMAC-2 (rates >2.048 Mbps and all Rate 21/44, 5/16 Turbo) * EDMAC-3 for SNMP Proxy same as EDMAC R-S Outer Codec nd Turbo Product Codec - 2 Generation (optional plug-in module) nd LDPC Codec (optional plug-in module - includes all 2 Generation TPC modes VersaFEC Codec (optional plug-in module short-block, low latency LDPC) VersaFEC Adaptive Coding and Modulation IP interface only maximum symbol rate = 4100 ksps Automatic Uplink Power Control (AUPC) mode High Rate ESC, Enhanced ESC (ESC++) Enhanced Drop & Insert (D&I++) Quad E1 Drop & Insert (QDI) - concatenates time slots from up to four E1 G.703 streams, Framed QDI DoubleTalk Carrier-in-Carrier mode (optional plug-in module) None: Uncoded BPSK/QPSK/OQPSK Viterbi: k=7, per IESS-308/309 BPSK: Rate 1/2 QPSK/OQPSK: Rate 1/2, Rate 3/4 and Rate 7/8 16-QAM: Rate 3/4 and Rate 7/8 (Viterbi plus Reed-Solomon only) Sequential: BPSK: Rate 1/2 QPSK/OQPSK: Rate 1/2, Rate 3/4 and Rate 7/8 Reed-Solomon (Open Network): IDR modes: 225/205 for T1 219/201 for E1 and IESS-310 mode, 194/178 for T2 and E2 IBS modes: 126/112 and 219/201 for IESS-310 mode Reed-Solomon (Closed Network): 220,200 outer code (transparent mode) 225,205 outer code (transparent mode, EF Data compatible, V.35 scrambling) 126,112 outer code (transparent mode, IBS parameters, D&I++ mode) 219,201 outer code (transparent mode, IESS-310 parameters) 200,180 outer code (EDMAC modes) Interleaver depth = 4 or 8 (depending on mode) 8-PSK/TCM Rate 2/3 (Trellis): Per IESS-310 Turbo Product Codec, 2nd Generation (Optional plug-in card, includes LDPC modes): Rate 5/16 (2 dimensional) and Rate 21/44 (3-dimensional) BPSK Rate 21/44 QPSK/OQPSK (aka 1/2) - 3 dimensional Rate 3/4 QPSK/OQPSK/8-PSK/8-QAM/16-QAM - 2 dimensional Rate 7/8 QPSK/OQPSK/8-PSK/8-QAM/16-QAM - 2 dimensional Rate 0.95 QPSK/OQPSK/8-PSK/8-QAM/- 2 dimensional TPC (exact Code Rate is actually 17/18, or 0.944) Low Density Parity Check (LDPC) Codec (Optional plug-in card): Rate 1/2 BPSK/QPSK/OQPSK Rate 2/3 QPSK/OQPSK/8-PSK/8-QAM Rate 3/4 QPSK/OQPSK/8-PSK/8-QAM/16-QAM VersaFEC Codec (Optional plug-in card short-block, low latency LDPC): Rate 0.488 BPSK Rate 0.533, 0.631, 0.706, 0.803 QPSK Rate 0.642, 0.711, 0.780 8-QAM Rate 0.488 16-QAM

3.3.1.1 HSSI Operation via the Data Interface Connector
For HSSI operation (Tx, Rx, or both), the optional CIC-60 Adapter Module, shown in Figure 3-2, may be purchased from Comtech EF Data to adapt the Data Interface 25-pin Type D female connection to a standard 50-pin Type HD HSSI (SCSI-II) female connection. Refer to Table 3-3 for the pinouts for the HSSI side of the CIC-60 Adapter Module. Note: Prior to using this adapter, the user must first configure the modem accordingly via the front panel (see Chapter 5. FRONT PANEL OPERATION for more information):
SELECT: Configure Configure Mode
(Select HSSI for both Tx Mode and Interface and Rx Mode and Interface).
CIC-60 Adapter Module (Modem Interface Side)
CIC-60 Adapter Module (Installed, HSSI Interface Side Shown)
Figure 3-2. CIC-60 Adapter Module
Table 3-3. CIC-60 Connector Pinouts (HSSI side)
HSSI/EIA-613 Interface Connector Pinout Signal Function Signal Ground Receive Timing DCE Available Receive Data Loopback circuit C Send Timing Signal Ground DTE Available Terminal Timing Loopback circuit A Send Data Loopback Circuit B Signal Ground Not used TX DVALID reserved (to DCE) reserved (to DCE) reserved (to DCE) Signal Ground SG 102 undefined undefined undefined reserved (to DTE) undefined undefined Test Mode Signal Ground TM SG HSSI Signal SG RT CA RD LC ST SG TA TT LA SD LB SG EIA-613 Circuit undefined 108/undefined undefined Pin # (+,-) 1, 26 2, 27 3, 28 4, 29 5, 30 6, 31 7, 32 8, 33 9, 34 10, 35 11, 36 12, 37 13, 38 14, 39 15, 40 16, 41 17, 42 18, 43 19, 46 22, 47 23, 48 24, 49 25, 50 from DCE from DCE from DCE to DCE to DCE to DCE to DCE to DCE Not used Ground Not used Not used Not used Not used Not used Ground Not used Not used Not used Not used Not used Not used Not used Ground Not used From DCE From DCE From DCE From DCE From DCE Ground Not used Circuit Direction Comment Ground

G.703 Connectors

3.3.2.1 Balanced G.703 Connector, DB-9F
The Balanced G.703 connector is a 9-pin Type D female connector. It is used for single port G.703, D&I or D&I++; when used with Quad E1 operations, this connector serves Ports 1 and 2 of the Quad E1 interface. Refer to Table 3-4 for pinouts. Table 3-4. Balanced G.703 Connector Pinouts
Pin # 3 Signal Function Serial G.703 Tx in + Tx in Signal Function D&I or D&I++ DDI + DDI DDO + DDO IDI + IDI IDO + IDO GND Signal Function Quad D&I Port 1 Tx In + Port 1 Tx In Port 1 Rx Out + Port 1 Rx Out Port 2 Tx In + Port 2 Tx In Port 2 Rx Out + Port 2 Rx Out GND

Rx out + Rx out GND

3.3.2.2 Auxiliary G.703 Connector, DB-9F
The Auxiliary G.703 connector is a 9-pin Type D female connector. When used with Quad E1 operations, this connector serves Ports 3 and 4 of the Quad E1 interface. Refer to Table 3-5 for pinouts. Table 3-5. Auxiliary G.703 Connector Pinouts
Pin # 3 Signal Function Serial G.703 Signal Function D&I or D&I++ Signal Function Quad D&I Port 3 Tx in + Port 3 Tx in Port 3 Rx out + Port 3 Rx out Port 4 Tx in + Port 4 Tx in Port 4 Rx out + Port 4 Rx out GND

Click a tab to continue.

6.5.4 Web Server Page Descriptions 6.5.4.1 6.5.4.1.1 Home Page Home | Home Page
Figure 6-1. CDM-625 Satellite Modem Home page From any location within the Web Server Interface, the user can select the Home tab and/or hyperlink to return back to this top-level page.

6.5.4.1.2

Home | Contact Page
Figure 6-2. Home | Contact Information page The Contact page (Figure 6-2) provides basic contact information to reach Comtech EF Data Sales and Customer Support via phone or automated e-mail links.

6.5.4.1.3

Home | Support Page
Figure 6-3. Home | Customer Support page The CDM-625 Support page (Figure 6-3) allows the user to compose an e-mail message for questions or problems with the modem. The Problem Report area of the display allows up to 256 characters maximum. The CDM-625 Support Web Page uses SMTP (Simple Mail Transport Protocol) to send e-mail to Comtech EF Data Modem Support (cdmipsupport@comtechefdata.com).
For this page to operate correctly, the modems administrator is required to specify the SMTP server, domain name, and destination on the Admin | Access page (see Sect. 6.5.4.2.1).
Once the Contact Information is entered and a message composed in the Problem Report text window, click [Submit E-mail] to send the message.

6.5.4.2

Admin Pages
The Admin pages provide the means to set up the access parameters required to facilitate communication with the CDM-625 Web Server.
The Admin pages are available only to users who have logged in using the Administrator Name and Password.

6.5.4.2.1

Admin | Access Page
Figure 6-4. Admin | Access page The Admin | Access page (Figure 6-4) provides the means to set up user names, passwords, the e-mail server, and the host IP addresses to facilitate communication with the CDM-625 Web Server.
System Account Access Information
Admin, Read/Write, Read Only Names and Passwords: The factory defaults for these names/passwords are: o o o Admin Read/Write Read Only comtech/comtech opcenter/1234 monitor/1234
Note the following: o o These Name fields can be any alphanumeric combination with a maximum length of 10 characters. These Password fields can be any alphanumeric combination with a maximum length of 10 characters.
SMTP Server: Specify the mail server IP address from where you want to send the email. SMTP Domain Name / Destination: The Administrator can assign the SMTP Domain Name and Destination. This is required if the e-mail feature of the Support Page (Sect. 6.5.4.1.3) is to be used. o o For SMTP Domain Name, specify the domain of the e-mail server (usually found to the right of the @ symbol in an e-mail address). For SMTP Domain Destination,specify the e-mail recipient name (usually found to the left of the @ symbol in an e-mail address).

Host Access List

IP (#) / Mask: The Host Access List allows a user to define which remote clients can connect when the Access List is Enabled. Each entry allows a user to specify an IP address and a subnet mask to define a unique class of machines that are allowed access. For example, if a user wanted to grant access to a PC with an IP Address of 10.10.10.1 and any PC on a subnet of 192.168.10.xxx, then the Access List would be defined as : IP 1 / Mask: 10.10.10.1/32 IP 2 / Mask: 192.168.10.0/24 For IP 3 / Mask and IP 4 / Mask, make sure they are not 0.0.0.0/0. An entry with 0.0.0.0/0 simply means any machine is allowed to access. Access List: The Access List allows a user to grant access via HTTP and SNMP to a well-defined list of client machines. Select Enable or Disable. If Disabled, then any client machine will be able to connect via HTTP and SNMP. Once the desired configuration settings have been made on this page, the user should then click [Submit Admin] to save these changes.

6.5.4.2.2

Admin | SNMP Page
Figure 6-5. Admin | SNMP page The Admin | SNMP page (Figure 6-5) sets and returns administration information for the CDM-625 Simple Network Management Protocol (SNMP) feature. The Administrator can assign up to two SNMP Trap IP addresses. The Administrator can assign a SNMP Trap Community String. The factory default for this parameter is public. The SNMP Trap Community String field can be any combination of characters and a length of 0 - 20 characters. Once the desired configuration settings have been made on this page, the user should then click [Submit Admin] to save these changes. For details pertaining to the configuration parameters available on this page, refer to Chapter 5. FRONT PANEL OPERATION and Sect. 6.3 SNMP INTERFACE.

6.5.4.3

Config (Configuration) Pages
The Config Mdm pages (Figure 6-6 through Figure 6-12) are used to configure all modem parameters.

6.5.4.3.1

Config | IP
Figure 6-6. Config | IP page The Config | IP page (Figure 6-6) is used to configure the modems IP Address and Gateway.

Network Configuration

Ping Reply: Use the drop-down menu to select as Disabled or Enabled. MAC Address: This parameter is read-only and cannot be changed. WAN Buffer Length: This parameter is configurable between 20ms and 400ms, in 20ms increments.
QoS Priority: Use the drop-down menu to select as Off, VLAN only, Port only, or VLAN & Port. IP Gateway / Address: Configure the modems IP Gateway and Address using these fields. MAC Learning: Use the drop-down menu to select as On or Off as needed.

*ST optional

Timing mode: Usually loop timing (or Rx-Sat) END RESULT: The G.703 signal at A is generated with the same accuracy as TT at the local end
Figure 9-8. G.703 Clock Extension Mode 2
Rx clock at desired link data rate

IP Interface

ETHERNET

DATA (HDLC) DATA CLK

(HDLC) RD

Mod Demod

2) Tx and Rx rates can be asymmetrical

Any desired data rate

1) The IP interface can be set to any desired data rate, with 1 bps resolution
Tx timing mode: Internal clock, locked to external G.703 Rx: Buffer disabled
Timing mode: Rx buffer disabled
END RESULT: The G.703 signal at A is perfectly reproduced at B , regardless of the exact link data rate
Figure 9-9. G.703 Clock Extension Mode 3
Chapter 10. DoubleTalk Carrier-in-Carrier OPTION
BEFORE ATTEMPTING TO COMMISSION A SATELLITE LINK USING CARRIERIN-CARRIER, THE USER MUST ENSURE THAT THE LINK IS ROBUST ENOUGH FOR NORMAL OPERATION. ONLY WHEN THIS HAS BEEN DONE AND ALL SYSTEM ISSUES (E.G., ANTENNA-POINTING, CABLING, TERRESTRIAL INTERFERENCE, SATELLITE INTERFERENCE, ETC.) HAVE BEEN RESOLVED SHOULD THE USER ATTEMPT THE USE OF CARRIER-IN-CARRIER.

10.1 Introduction

Space segment costs are typically the most significant operating expense for any satellite-based service, having a direct impact on the viability and profitability of the service. For a satellite transponder that has finite resources in terms of bandwidth and power, the leasing costs are determined by bandwidth and power used. Therefore, a satellite circuit should be designed for optimal utilization to use a similar share of transponder bandwidth and power. The traditional approach to balancing a satellite circuit once the satellite and earth station parameters are fixed involves trade-off between modulation and coding. A lower order modulation requires less transponder power while using more bandwidth; conversely, higher order modulation reduces required bandwidth, albeit at a significant increase in power. Comtech EF Data has added a new dimension to satellite communication optimization: DoubleTalk Carrier-in-Carrier.
10.2 What is DoubleTalk Carrier-in-Carrier?

CDM-625 Advanced Satellite Modem Offset QPSK Operation
Chapter 14. OPEN NETWORK OPERATIONS

14.1 Overview

This chapter summarizes the functionality and specifications of the various Open Network operating modes: IBS Drop and Insert (D&I) IDR

14.2 IBS

Primary Data Rates Supported G.703 EIA-422, V.35, LVDS ADPCM Audio (2 Channels) 1544, 2048, 6312 and 8448 kbps SD, RD N x 64 kbps SD, RD (up to 8448 kbps) 64 kbps only, full duplex Engineering Service Channel Earth Station-to-Earth Station Channel EIA-232 data synchronous at 1/480 of the primary data EIA-232 data asynchronous at 1/2000 of the primary data High Rate Engineering Service Channel ESC Data Interface Type ESC Data Rate Async configurable async character format, EIA-232 at up to 1/20th of primary data rate Example: 2400 baud at 64 kbps Faults and Alarms Satellite Backward Alarm Receive BWA Output 1 (per IESS-309) Enabled onto terrestrial secondary alarm
CDM-625 Advanced Satellite Modem Open Network Operations

14.2.1

IBS Clock/data Recovery and De-jitter
Performs clock and data recovery on the G.703 format. Clock de-jitter and data encoding/decoding is done as with the IDR configuration.

14.2.2

IBS Framing
Multiplexes/demultiplexes the primary data in compliance with the standard IESS-309 overhead ratio of 1/15 (4 overhead bytes per 60 data bytes) and provides the rate exchanged transmit clock to the modulator portion of the base modem.

14.2.3

IBS Engineering Service Channel
Bi-directional processing of the components of the ESC channel, including the ASYNC or SYNC EIA-232 data channel, and fault/alarm indications. Alternately, a high-rate ESC channel at up to 1/20th of the primary data rate is available, using async EIA-232 format.

14.2.4

IBS Scrambling
Provides the synchronous scrambling/descrambling of the satellite-framed data specified in IESS-309. Base modem scrambling/descrambling is disabled in this mode.
14.3 Drop and Insert (D&I)
Primary Data Rates Supported G.703, EIA-422, V.35 and Serial LVDS Satellite Data Rates Supported (all have 16/15 overhead) Terrestrial Framing Supported Satellite Overhead Rate 1544 kbps SD, RD, DDO, IDI 2048 kbps SD, RD, DDO, IDI N x 64 kbps N = 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, or 24 (T1) N = 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, or 30 (E1-CCS) N = 1, 2, 4, 6, 8, 12, 16, 24, 30 (E1-CAS) G.732/G.733, G.704 16/15 of data rate per IESS-308 Rev. 6 and IESS-309 Rev. 3, or higher 1 to 24 (all T1 modes) 1 to 30 (E1-CAS and E1-CCS) Arbitrary order, non-contiguous available Selectable size of 64 to 262,144 bits, in 16-bit steps (with added limitations for G.704 frame boundaries) Derived from Insert Data In (Insert Clock) External, RX (satellite) or TX (Terrestrial)

17.6 VersaFEC ACM

VersaFEC (a registered trademark of Comtech AHA), in concert with a novel ACM approach, addresses all of the shortcomings of DVB-S2 outlined above. There are patents pending for both VersaFEC and the ACM scheme. VersaFEC covers a family of 12 short-block LDPC ModCods, specifically designed for low latency and ACM applications. However, the VersaFEC codes are equally well suited to Constant Coding and Modulation (CCM) applications. The requirements for an ACM system that approaches the minimum possible latency are: The shortest possible LDPC codes that give performance at or very close to DVB-S2, in order to minimize latency, and which do not use interleaving. Design of the encoder to further reduce latency to the minimum possible. A constant number of symbols per block, to reduce the demodulator and decoder complexity, and significantly, also reduces latency in the ACM case. The elimination of the need for pilot symbols for carrier tracking at low SNR by substitution of other modulation techniques. This further reduces the complexity of the demodulator. Reduction in the number of ModCods to further reduce complexity. The inclusion, at the physical layer, of an overhead channel to permit the reporting of SNR metrics back to the originating end. Note that this does not have to be enabled or disabled it is part of the fundamental frame structure of VersaFEC ACM, and has been take into account in the code rate.
The family of VersaFEC short-block LDPC codes is presented in Table 17-1. The modulation types include BPSK, QPSK, 8-QAM and 16-QAM. It will be seen from the table that in order to maintain a constant number of symbols per block, the block size in bits (data + parity) must necessarily change, depending on both the modulation type (which affects the number of bits per symbol) and the code rate. For VersaFEC, the block size varies between 2k and 8.2k bits. At worst, therefore, the VersaFEC codes are 50% shorter than the short DVB-S2 codes. Table 17-1. The VersaFEC ModCod set
Modulation BPSK QPSK QPSK QPSK QPSK 8-QAM 8-QAM 8-QAM 16-QAM 16-QAM 16-QAM 16-QAM Code Rate 0.488 0.533 0.631 0.706 0.803 0.642 0.711 0.780 0.731 0.780 0.829 0.853 Spectral efficiency, bps/Hz 0.49 1.07 1.26 1.41 1.61 1.93 2.13 2.34 2.93 3.12 3.32 3.41 Block size, bits 2k 4.1k 4.1k 4.1k 4.1k 6.1k 6.1k 6.1k 8.2k 8.2k 8.2k 8.2k Typical Eb/No, for BER = 5 x 10-8 2.4 dB 2.2 dB 2.7 dB 3.4 dB 3.8 dB 4.6 dB 5.2 dB 5.6 dB 6.3 dB 7.0 dB 7.5 dB 8.0 dB Latency at 64 kbps, in milliseconds Min. Data Rate, CCM mode 18 kbps 20 kbps 23 kbps 26 kbps 28 kbps 35 kbps 39 kbps 43 kbps 53 kbps 57 kbps 60 kbps 62 kbps Max. Data Rate, CCM mode 5.7 Mbps 10 Mbps 10 Mbps 10 Mbps 12 Mbps 12 Mbps 12 Mbps 12 Mbps 12 Mbps 14 Mbps 14 Mbps 16 Mbps

Note that the accuracy of this method degrades significantly at low values of (Co+No)/No (approximately less than 6 dB).
CDM-625 Advanced Satellite Modem Appendix B
Example: In the above diagram, the (Co+No)/No measured is 4.6 dB. If Rate 1/2 QPSK is used, this corresponds to an Eb/N0 of approximately 2.6 dB. The exact relationship used to derive the table values is as follows: Eb/N0 = 10 log10 (10 (Co+No/No )/10) -1) - 10 log10 (FEC Code Rate) - 10 log10 (bits/symbol) and:
Eb/N0 and (Co+No)/No are expressed in dB Bits/symbol = 1 for BPSK Bits/symbol = 2 for QPSK Bits/symbol = 3 for 8-PSK/8-QAM Bits/symbol = 4 for 16-QAM Code Rate for uncoded = 1 Pay close attention to the sign of the middle term See Chapter 12. ESC++ for details of how the Eb/No performance degrades when ESC++ is used, particularly at lower data rates, where the percentage overhead is high.
Eb/No Eb/No Eb/No Eb/No Eb/No Eb/No (Co+No) Uncoded Rate 1/2 Rate 21/44 Rate 5/16 Uncoded Rate 1/2 /No BPSK BPSK BPSK BPSK QPSK QPSK Eb/No Rate 3/4 QPSK Eb/No Eb/No Eb/No Rate 7/8 Rate 0.95 Rate 2/3 QPSK QPSK 8-PSK Eb/No Rate 3/4 8-PSK Eb/No Eb/No Eb/No Rate 7/8 Rate 0.95 Rate 3/4 8-PSK 8-PSK 16-QAM Eb/No Rate 7/8 16-QAM -
EDMAC Framing: rates below 2048 kbps add 0.2 dB, otherwise 0
1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0 10.5 11.0 11.5 12.0 12.5 13.0 13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0 18.5 19.0 19.5 20.0 1.1 1.7 2.4 3.0 3.6 4.3 4.8 5.4 6.0 6.5 7.1 7.6 8.2 8.7 9.2 9.8 10.3 10.8 11.3 11.9 12.4 12.9 13.4 13.9 14.4 14.9 15.4 15.9 16.5 17.0
0.0 0.9 1.8 2.6 3.3 4.1 4.7 5.4 6.0 6.6 7.3 7.8 8.4 9.0 9.5 10.1 10.6 11.2 11.7 12.2 12.8 13.3 13.8 14.3 14.9 15.4 15.9 16.4 16.9 17.4 17.9 18.4 18.9 19.5 20.0
0.7 1.2 1.7 2.1 2.6 3.0 3.9 4.8 5.6 6.3 7.1 7.7 8.4 9.0 9.6 10.3 10.8 11.4 12.0 12.5 13.1 13.6 14.2 14.7 15.2 15.8 16.3 16.8 17.3 17.9 18.4 18.9 19.4 19.9 20.4 20.9 21.4 21.9 22.5 23.0
0.9 1.4 1.9 2.3 2.8 3.2 4.1 5.0 5.8 6.5 7.3 7.9 8.6 9.2 9.8 10.5 11.0 11.6 12.2 12.7 13.3 13.8 14.4 14.9 15.4 16.0 16.5 17.0 17.5 18.1 18.6 19.1 19.6 20.1 20.6 21.1 21.6 22.1 22.7 23.2
0.8 1.5 2.1 2.7 3.2 3.7 4.2 4.6 5.0 5.9 6.8 7.6 8.4 9.1 9.8 10.4 11.1 11.7 12.3 12.9 13.4 14.0 14.6 15.1 15.7 16.2 16.7 17.3 17.8 18.3 18.8 19.4 19.9 20.4 20.9 21.4 21.9 22.4 23.0 23.5 24.0 24.5 25.0

0.9 1.8 2.6 3.3 4.1 4.7 5.4 6.0 6.6 7.3 7.8 8.4 9.0 9.5 10.1 10.6 11.2 11.7 12.2 12.8 13.3 13.8 14.3 14.9 15.4 15.9 16.4 16.9 17.4 17.9 18.4 18.9 19.5 20.0
0.8 1.5 2.3 2.9 3.6 4.2 4.8 5.5 6.0 6.6 7.2 7.7 8.3 8.8 9.4 9.9 10.4 11.0 11.5 12.0 12.5 13.1 13.6 14.1 14.6 15.1 15.6 16.1 16.6 17.1 17.7 18.2
0.9 1.7 2.3 3.0 3.6 4.2 4.9 5.4 6.0 6.6 7.1 7.7 8.2 8.8 9.3 9.8 10.4 10.9 11.4 11.9 12.5 13.0 13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.1 17.6
1.3 1.9 2.6 3.2 3.8 4.5 5.0 5.6 6.2 6.7 7.3 7.8 8.4 8.9 9.4 10.0 10.5 11.0 11.5 12.1 12.6 13.1 13.6 14.1 14.6 15.1 15.6 16.1 16.7 17.2
4.8 5.4 6.0 6.5 7.1 7.6 8.2 8.7 9.2 9.8 10.3 10.8 11.3 11.9 12.4 12.9 13.4 13.9 14.4 14.9 15.4 15.9 16.5 17.0
4.9 5.5 6.0 6.6 7.1 7.7 8.2 8.7 9.3 9.8 10.3 10.8 11.4 11.9 12.4 12.9 13.4 13.9 14.4 14.9 15.4 16.0 16.5
4.8 5.3 5.9 6.4 7.0 7.5 8.0 8.6 9.1 9.6 10.1 10.7 11.2 11.7 12.2 12.7 13.2 13.7 14.2 14.7 15.3 15.8
4.5 5.0 5.6 6.1 6.7 7.2 7.7 8.3 8.8 9.3 9.8 10.4 10.9 11.4 11.9 12.4 12.9 13.4 13.9 14.4 15.0 15.5
5.3 5.8 6.4 6.9 7.4 8.0 8.5 9.0 9.5 10.1 10.6 11.1 11.6 12.1 12.6 13.1 13.6 14.1 14.7 15.2
5.2 5.8 6.3 6.8 7.4 7.9 8.4 8.9 9.5 10.0 10.5 11.0 11.5 12.0 12.5 13.0 13.5 14.1 14.6 Reed-Solomon: add an additional 0.4 dB to the values shown

IBS Framing: add 0.2 dB

Appendix C. FAST Activation Procedure

C.1 FAST System Overview

Comtech EF Datas FAST system is factory-implemented in the modem. All FAST options are available through the basic platform unit at the time of order FAST allows immediate activation of available options, after confirmation by Comtech EF Data, through the front panel keypad or via the remote control interface.
Hardware options for basic modems can be ordered and installed either at the factory or in the field. The operator can select options that can be activated easily in the field, depending on the current hardware configuration of the modem. A unique access code enables configuration of the available hardware.
CDM-625 Advanced Satellite Modem Appendix C
Table 1-1 in Chapter 1. INTRODUCTION shows the FAST and FAST-accessible hardware options available for the CDM-625.
FAST Activation Procedure
The FAST options are linked to three option registers: Register 1 is for Data Rate options; Register 2 is for L-Band, Modulation type and Framing options; Register 3 is reserved for future options.
When an unlock FAST code is obtained from Comtech EF Data it will be for a specific register.

C.2.1 Serial Number

Obtain the Modem serial number as follows: a) From the front panel main menu, SELECT: FAST, then press [ENTER]. b) The Modem motherboard Serial Number is displayed on the bottom line, to the left. c) Record serial number:
C.2.2 View currently installed features
To view the currently installed features, proceed as follows: a) From the front panel main menu, SELECT: FAST, then press [ENTER]. b) From the SELECT: FAST

! (ASCII code 33) * (ASCII code 42)
# (ASCII code 35) (ASCII code 126)

^ (ASCII code 94)

Optional Message Arguments
Arguments are not required for all messages. Arguments are ASCII codes for the characters 0 to 9 (ASCII codes 48 to 57); period (ASCII code 46); and comma (ASCII code 44); plus miscellaneous printable characters.

End of Packet

Controller-to-Target: This is the 'Carriage Return' character (ASCII code 13). Target-to-Controller: This is the two-character sequence 'Carriage Return' (ASCII code 13), and 'Line Feed' (ASCII code 10). Both indicate the valid termination of a packet.
Remote Commands and Queries
Column C = Command; Column Q = Query; columns marked X designate instruction code as Command only, Query only, or Command/Query. Index Notes: Where annotation reads XIP = Only in IP-ACM mode see command summary for details
CODE ABA ACM ADJ ALA APP AUP BAD BCH BCL BDC BDV BER BFR BFS BKE BOE BOL BPA BPC BPS BRE BRM BRR BRX BSQ BSV BTX BUT CAE CAS CCF CDM CEX CFM CID CLD CNM C X X X X X X X X X Q X X X X X X X X X X X X X X X X X X X X X X X X X X X PAGE D-23 D-23 D-23 D-23 D-9 D-10 D-51 D-51 D-51 D-51 D-61 D-46 D-51 D-46 D-23 D-51 D-52 D-52 D-52 D-52 D-23 D-24 D-24 D-24 D-36 D-52 D-24 D-52 D-24 D-24 D-25 D-46 D-25 D-46 D-25 D-36 D-25 CODE CPM CRM CSD CST CTD DAY DIC DNI DTS DTY EBA EBN EFM EFR EGC EID EMU ESA ESC FCC FCF FLT FPL FRW FSW HHC HRV IEP IMG IPA IPG IPT ISP ITS ITY LNC LNH C X X X X X X X X X X X X X X X X Q X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X PAGE D-26 D-46 D-26 D-36 D-26 D-26 D-37 D-38 D-10 D-10 D-18 D-46 D-26 D-27 D-54 D-44 D-27 D-27 D-27 D-43 D-43 D-47 D-28 D-43 D-28 D-28 D-43 D-28 D-28 D-28 D-29 D-29 D-29 D-18 D-18 D-53 D-53 CODE LNL LNR LPS LRS LVO MAC MGC MSK NPS NUE NUS ODS ODU OFN OGC OUS PCO PLI QDI QOS RBA RBP RBS RCB RCI RCK RCR RDI RDR RDS REB RED REE RET RFM RFO RFQ C X X X X Q X X X X X X X X X X X X X X X X X X X X X X X X X IP X X IP X X X X X X X X X PAGE D-53 D-53 D-53 D-29 D-53 D-29 D-39 D-29 D-54 D-29 D-29 D-48 D-29 D-29 D-41 D-48 D-29 D-10 D-42 D-54 D-18 D-29 D-18 D-18 D-19 D-19 D-15 D-19 D-15 D-19 D-11 D-49 D-19 D-19 D-15 D-49 D-19 CODE RFT RIR RIT RLO RMD RMI RMR RMX RNE RNS RRS RSI RSL RSN RSR RSW RTC RTE RTF RTS RVL SCP SEC SML SMV SNO SNR SPC SSI SVA SVD SVE SVM SVT SWR TBA TBP C X X X X X X Q X X X X IP X X X X X X X X X X X X X X X X X X X X X X X X X X PAGE D-15 D-20 D-15 D-20 D-15 D-20 D-20 D-20 D-32 D-33 D-21 D-21 D-49 D-50 D-15 D-21 D-21 D-21 D-22 D-33 D-22 D-34 D-55 D-55 D-55 D-43 D-50 D-55 D-33 D-55 D-56 D-56 D-56 D-56 D-43 D-11 D-34 CODE TCI TCK TCR TDI TDR TET TFM TFQ TFT TIM TIR TIT TLO TMD TMI TMP TMR TMX TPL TRS TSC TSI TSR TST TTA TTC TTF TVL TXA TXO WBF WBL WRM C X X X X X X X X X X X X X Q X X IP X X IP X X X X X X X X X IP X X X X X X X X X X X X X X X X X X X X PAGE D-11 D-11 D-8 D-11 D-9 D-11 D-7 D-12 D-7 D-35 D-12 D-6 D-12 D-8 D-12 D-50 D-12 D-12 D-13 D-13 D-13 D-13 D-9 D-35 D-14 D-14 D-14 D-14 D-35 D-14 D-56 D-56 D-35

Query (Instruction & Qualifier) TDR?
Response to Query TDR=xxxxx.xxx (see Description of Arguments)

Tx Data Rate TDR=

Tx Symbol Rate

9 bytes, numeric

Read-only if Modulation Type is a Reserved type Query only (Command or Query in IP-ACM). Allows remote access to the Tx symbol rate, in the form ddddd.ddd Note: Symbol Rate ranges in IP-ACM = 37 ksym/sec to 4100 ksym/sec Command or Query. Defines AUPC operating parameters. Has the form abc.cd, where: a=Defines action on max. power condition. (0=do nothing, 1=generate Tx alarm) b=Defines action on remote demod unlock. (0=go to nominal power, 1=go to max power) c.c=Target Eb/No value, for remote demod, from 0.0 to 14.9 dB, where numbers above 9.9 use hex representation for the 1 st character, ie 14.9 is coded as E.9. d =Max increase in Tx Power permitted, from 0.0 to 9.0 dB Example: APP=015.67 (Sets no alarm, max power, 5.6 dB Target and 7 dB power increase.)
TSR? TSR= TSR* TSR# APP= APP? APP* APP#
TSR=ddddd.ddd (see Description of Arguments)

AUPC Parameters

6 bytes
APP=abc.cd (see Description of Arguments)
Parameter Type Power Level Mode (was AUPC Enable)
Command (Instruction & Qualifier) AUP=
Number of Arguments 1 byte, 0, 1, 2 or 3 Command or Query.
Response to Command AUP= AUP? AUP* AUP#
Query (Instruction & Qualifier) AUP?
Response to Query AUP=x (see Description of Arguments)
Power level mode, where: 0=MANUAL mode (AUPC disabled). Normal power mode 1=AUPC enabled. 2=MANUAL-LOW. Low power mode (-65 to -20dBm) - external attenuator activated. 3=AUPC-LOW. AUPC enabled and external attenuator activated Example: AUP=1 Notes: EDMAC or D&I++, E1 D&I w/ccs or ESC++ framing must be selected for the AUPC feature to be available. External 20dB Attenuator is a hardware option. AUPC is not available in IP-ACM. Command or Query. (Drop parameter) (Note different format between command and query.) Command format: DTS=xxy, where: xx = Channel 01 through 24 y = timeslot: 0-9, A=10, B=11, C=12, D=13,V=31

Tx Drop Timeslot

DTS= DTS? DTS* DTS#
DTS=yyyyyyyyyyyyyyy yyyyyyyyy indicating all 24 Drop timeslots values associated with the 24 Tx Satellite channels.

Drop Type

1 byte, value of 0 thru 3
Command or Query. (DROP/D&I++/QDI parameter) Drop Type where: 0=T1D4 1=T1ESF 2=E1CCS 3=E1CAS Query only. Returns the increase in Tx power level, in dB (from the nominal setting) due to the action of AUPC. Responds x.x if AUPC is disabled. Example: PLI=2.3

DTY= DTY? DTY* DTY#

DTY=x (see Description of Arguments)

Tx Power Level Increase

PLI=x.x (see Description of Arguments)

ITY= ITY? ITY* ITY#

ITY=x (see Description of Arguments)
RBA= RBA? RBA* RBA# RBS= RBS? RBS* RBS# RCB= RCB? RCB* RCB#
RBA=xxxx (see Description of Arguments)

Rx Buffer Size

5 bytes
RBS=xxxxx (see Description of Arguments)

ReCenter Buffer

Example: RBS=08192 (selects 8192 bytes) Command only. Forces the software to recenter the receive Plesiochronous/Doppler buffer. Note: This command takes no arguments. Example: RCB=
Parameter Type Rx Clock Invert
Command (Instruction & Qualifier) RCI=
Number of Arguments 1 byte, value 0 or 1 Command or Query.
Response to Command RCI= RCI? RCI* RCI# RCK= RCK? RCK* RCK#
Query (Instruction & Qualifier) RCI?
Response to Query RCI=x (see Description of Arguments)

Rx Clock Source

Invert Receive Clock, where x may be: 0=Normal 1=Inverted Command or Query. Rx Clock Source, where: 0=Rx Satellite 1=Tx-Terrestrial 2=Internal(SCT) 3=INSERT (command valid only when Rx framing is Insert or D&I++ and interface is G.703 or set for D&I loop. Example: RCK=1 (selects Tx-Terrestrial) Command or Query. Invert Receive Data: 0=Normal 1=Inverted Example: RDI=1 (selects Inverted RX Data) Command or Query. Rx Descrambler state, where: 0=Off 1=Normal 2=IESS-315
RCK=x (see Description of Arguments)

Rx Data Invert

RDI= Exception: 600/L Emulation: IRD=
RDI= RDI? RDI* RDI# RDS= RDS? RDS* RDS#
RDI? Exception: 600/L Emulation: IRD? RDS?
RDI=x (see Description of Arguments) RDS=x (see Description of Arguments)

Rx Descrambler

Receive Equalizer Enable

1 byte

Example: RDS=1 (Scrambler On) Command or Query. 0=disabled 1=enabled
REE= REE? REE* REE# RET= RET? RET* RET# RFQ= RFQ? RFQ* RFQ#
REE=x (see Description of Arguments)

Receive ESC Type

The default is 0. Command or Query. (IDR parameter) Sets or queries IDR ESC Type, where: 0=64k data channel 1=2 Audio channels Command or Query. Frequency ranges: 50 MHz to 180 MHz, and 950 MHz to 1950 MHz (L-band FAST option) Resolution=100Hz. Note: The CDM-625 supports 70,140 MHz bands and L-band. Example: RFQ=0950.9872
RET=x (see Description of Arguments)

Rx Frequency

RFQ=xxxx.xxxx (see Description of Arguments) Exception: 600 Emulation: RFQ=xxx.xxxx
Exception: 600 Emulation: 8 bytes
Parameter Type Rx Information Rate RX LO Frequency
Number of Arguments 9 bytes, numeric Query only.