Comtech EF Data CDM-600 User Manual download pdf (Page 3)

ESC Specifications

IDR (Total Overhead 96 kbps)

Voice Orderwire

Data Orderwire

Backward Alarms

2 ADPCM (input: 4-wire VF), or 64 kbps data

8 kbps (EIA-422 interface)

Form C contacts, hardware or software mapped

IBS (Total Overhead 1/15 x data rate)

ASYNC Data

Orderwire

Backward Alarm

1/2000 x data rate

Form C contacts

ESC++

(Refer to manual)

ASYNC RS-232 at 1.2 to 38.4 kbaud

Modulator

Output

Spectrum/Filtering

Meets IESS-308/309 power spectral mask

Frequency Stability

Standard: ± 1.5 ppm, 0° to 50°C

(32° to 122°F)

Option: ± 0.02 ppm, 0° to 50°C

(32° to 122°F)

Harmonics and

Spurious

< -55 dBc/4 kHz

(Typically < –60 dBc/4 kHz)

Transmit On/Off

Ratio

55 dB minimum

Phase Noise

< 0.75 degrees RMS double-sided,

100 Hz to 1 MHz

Output Power

CDM-600: 0 to –20 dBm, 0.1 dB steps,

CDM-600L: 0 to –40 dBm, 0.1 dB steps

Accuracy

CDM-600: ± 0.5 dB over frequency and

temperature

CDM-600L: ± 1.5 dB over frequency and

temperature

External TX Carrier

Off

By TTL LOW signal

TX Terrestrial

Internal (SCT), EXT TT, Loop

Clock Options

Timing from satellite and EXT CLOCK

BUC FSK

Communications

CDM-600L Only: Via TX center conductor with

FSK BUCs

ODU/BUC Voltage

(Optional)

CDM-600L Only: 24 VDC, 4 amps, 100 W

48 VDC, 3.75 amps, 180 W

BUC 10 MHz

CDM-600L Only: On/Off

Demodulator

Input Power Range

CDM600: -30 to –60 dBm

CDM600L: -130 dBm + 10Log (symbol rate)

minimum

AGC (CDM-600L

Only)

50 dB above minimum

Max Composite Level

+35 dBc, up to –5 dBm

Acquisition Range

± 1 to ± 32 kHz, programmable in 1 kHz steps

Acquisition Time

Dependent on data rate, FEC and acquisition

range

Example: 1 sec average at 64 kbps Rate 1/2

LNB Voltage

CDM-600L only:

12, 18 or 24 VDC, up to 500mA

LNB 10 MHz

CDM-600L Only: On/Off

Example BER

Performance

Met with two adjacent carriers 7 dB higher

Guaranteed E

, in dB (Typical values in

parentheses)

Viterbi (B, Q, and OQPSK)

1/2 3/4 7/8

-5

5.4 (4.9) 6.8 (6.3) 7.7 (7.2)

-7

6.7 (6.2) 8.2 (7.7) 9.0 (8.6)

Sequential (Consult manual for details)

Viterbi Concatenated Reed-Solomon 220/200 or 200/180

(B, Q, and OQPSK)

1/2 3/4 7/8

-5

4.3 (4.0) 5.6 (4.7) 6.5 (6.0)

-7

4.5 (4.2) 6.0 (5.2) 6.9 (6.5)

8-PSK TCM/RS

(IESS-310)

(Consult manual for details)

Turbo Product Codec (Q/OQPSK)

1/2 3/4 7/8 0.95

-6

2.9 (2.6) 3.8 (3.4) 4.3 (4.0) 6.4 (6.0)

-8

3.3 (2.8) 4.4 (4.0) 4.5 (4.2) 6.9 (6.5)

(Please consult the manual for a performance listing of all FEC types,

Code Rates, and Modulation types.)

Receive Buffer

64 to 262144 bits, in 16 bit increments

Receive Clock Options RX satellite, TX terrestrial, external reference,

insert

Clock Tracking

100 ppm minimum

External Clock Input

BNC connector, 2.4 kHz to 20 MHz

External Reference

Input (Optional)

SMA female, 1, 2, 5, 10 or 20 MHz

Monitor Functions

, frequency offset, BER, buffer fill status,

RX receive signal level

Drop And Insert

Electrical Interface

G.703, RS-422 or V.35 (T1 or E1)

Frame Formats Supported

D4 or ESF for T1, CCS for E1

(Also CAS E1 for open network)

Available n x 64 kbps Data Rates

1 to 6, 8, 10, 12, 15, 16, 20, 24 or

30 for Open Network

1 to 24 for D&I++ enhanced

proprietary

Accessories

CRS-150 CRS-150 1:1 Modem Redundancy Switch

(With CRS-170A L-Band IF Switch – CDM-

600L)

CRS-300 CRS-300 1:N Modem Redundancy Switch

Available Options

How Enabled

Option

N/A

Variable data rate to 5 Mbps (standard)

FAST

Variable data rate to 10 Mbps

FAST

Variable data rate to 20 Mbps

FAST

8-PSK modulation (and 8-QAM if TPC/LDPC

Codec is installed – CDM-600)

FAST

CDM-600: LDPC to 10 Mbps

FAST

CDM-600: LDPC to 20 Mbps

FAST 16-QAM modulation

FAST

IBS operation

FAST

IBS with high-rate IBS ESC operation

FAST

IDR operation

FAST

Drop & insert operation

(open network and D&I++)

FAST

2 Audio IBS Operation

Hardware

Turbo Codec – low-rate 5 Mbps (21/44, 5/16,

3/4)

Hardware

Turbo Codec – high-rate 20 Mbps (21/44,

5/16, 1/2, 3/4, 7/8, 0.95)

Hardware

CDM-600: High-stability internal reference

(2 x 10

-8

) with external input capability

CDM-600L: internal reference 1.0 ppm

(standard, not with BUCs) or 2.0 ppm

(optional)

Hardware

CIC-20 HSSI interface converter

Hardware

TPC/LDPC Codec (Base to 5 Mbps - CDM-

600)

Hardware

RX Type F or Type N connector (CDM-600L)

Hardware CDM-600L: ODU PS 24 VDC, 100 W, AC or

DC input

Hardware CDM-600L: ODU PS 48 VDC, 180 W, AC or

DC input

1 2 3 4

Satellite Modems 1

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Comtech EF Data CDM-600 User Manual Page 3

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