Comtech EF Data CDM-600 Manual de usuario descargar pdf (Pagina 2)

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CDM-600

Open Network Satellite Modem

2.4 kbps to 20 Mbps

SYSTEM SPECIFICATIONS

Frequency Range 50 to 90 and 100 to 180 MHz

100 Hz resolution

Input/Output Impedance 50 and 75 Ω

(Front panel selectable)

IF Connectors BNC, female

Data Interfaces EIA-422/530, V.35, Sync EIA-232, G.703 balanced or

unbalanced, Low Voltage Differential Signal (LVDS),

HSSI (using CIC-20 HSSI/LVDS interface converter)

Data Rate Range (1 bps programmable, and fully independent Tx and Rx rates)

1/2 BPSK 2.4 kbps to 5.0 Mbps

1/2 QPSK/OQPSK 4.8 kbps to 10.0 Mbps

3/4 QPSK/OQPSK 7.2 kbps to 15 Mbps

7/8 QPSK/OQPSK 8.4 kbps to 17.5 Mbps

2/3 8-PSK 4.8 kbps to 20.0 Mbps

Uncoded 4.8 kbps to 20.0 Mbps

Turbo Product Coding Rates:

21/44 BPSK 4.8 kbps to 3.2 Mbps (High Rate = 4.77 Mbps)

5/16 BPSK 4.8 kbps to 2.048 Mbps (High Rate = 3.12 Mbps)

1/2 QPSK/OQPSK 4.8 kbps to 9.54 Mbps (High Rate Turbo Card)

3/4 QPSK/OQPSK 7.2 kbps to 5.0 Mbps (High Rate = 15 Mbps)

3/4 8-PSK 10.8 kbps to 5.0 Mbps (High Rate = 20 Mbps)

3/4 16-QAM 14.4 kbps to 5.0 Mbps (High Rate = 20 Mbps)

7/8 QPSK/OQPSK 8.4 kbps to 17.5 Mbps (High Rate Turbo Card)

7/8 8-PSK 12.6 kbps to 20.0 Mbps (High Rate Turbo Card)

7/8 16-QAM 16.8 kbps to 20.0 Mbps (High Rate Turbo Card)

0.95 QPSK/OQPSK 9.1 kbps to 18.888 Mbps (High Rate Turbo Card)

0.95 8-PSK 13.6 kbps to 20 Mbps (High Rate Turbo Card)

Low Density Parity Check (LDPC) Rates:

1/2 (BPSK) 4.8 kbps to 5.0 Mbps

1/2 (QPSK/OQPSK) 4.8 kbps to 10.0 Mbps

2/3 (QPSK/OQPSK) 6.4 kbps to 13.3 Mbps

2/3 (8-PSK, 8-QAM) 9.6 kbps to 19.0 Mbps

3/4 (QPSK/OQPSK) 7.2 kbps to 15.0 Mbps

3/4 (8-PSK, 8-QAM) 10.8 kbps to 20.0 Mbps

3/4 (16-QAM) 14.4 kbps to 20.0 Mbps

Scrambling

Mode dependent - ITU V.35 (Intelsat IESS-308), or

externally synchronized (Intelsat IESS-309/310/314 or proprietary)

FEC Options

Viterbi Rate 1/2 (BPSK, QPSK and OQPSK)

Rate 3/4 and 7/8 (QPSK, OQPSK and 16-QAM w/RS)

Sequential Rate 1/2, (BPSK, O/QPSK) 3/4 and 7/8 (O/QPSK)

Pragmatic TCM 8-PSK 2/3

Low Rate TPC BPSK 21/44, 5/16; QPSK/OQPSK 3/4;

8-PSK 3/4; 16-QAM 3/4

High Rate TPC BPSK 21/44, 5/16; QPSK/OQPSK 1/2, 3/4, 7/8, 0.95;

8-PSK 3/4, 7/8, 0.95; 16-QAM 3/4, 7/8

LDPC BPSK 1/2, QPSK/OQPSK 2/3, 3/4, 8-PSK 2/3, 3/4,

8-QAM 2/3 , 3/4, and 16-QAM 3/4

Reed-Solomon Intelsat compliant and proprietary modes available

Uncoded BPSK, QPSK and OQPSK

M&C Interface EIA-232, EIA-485 (2- or 4-wire)

Form C Relays Tx, Rx traffic alarms and Unit faults

Backward alarms for IDR and IBS

MODULATOR

Output Spectrum/filtering Meets IESS-308/309 power spectral mask

Frequency Stability Standard: ± 1.5 ppm, 0 to 50ºC (32 to 122ºF)

Option: ± 0.02 ppm, 0 to 50ºC (32 to 122ºF)

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 0 to –20 dBm, 0.1 dB steps

Accuracy ± 0.5 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

DEMODULATOR

Input Power Range -30 to -60 dBm

Max Composite Level +35 dBc, up to -5 dBm

Acquisition Range ± 1 to ± 32 kHz (1 kHz steps)

Acquisition Time Dependent on data rate, FEC and acquisition range

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 CDM-600 Manual for details)

Viterbi and 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 CDM-600 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 CDM-600 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, EXT REF, 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 E

, Frequency Offset, BER, Buffer fill status,

Rx receive signal level

DROP AND INSERT

Electrical interface

Frame formats supported

Available nx64 kbps Data Rates

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

D4 or ESF for T1, CCS for E1

(also CAS E1 for Open Network)

1 to 6, 8, 10, 12, 15, 16, 20, 24 or 30 for

Open Network

1 to 24 for D&I++ Enhanced Proprietary

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

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)

FAST LDPC to 10 Mbps

FAST 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 Board – Low Rate 5 Mbps (21/44, 5/16, 3/4)

Hardware Turbo Codec Board – High Rate 20 Mbps (21/44, 5/16, 1/2, 3/4, 7/8, 0.95)

Hardware High-stability Internal Reference (2 x 10

-8

) with external input capability

Hardware CIC-20 HSSI Interface Converter

Hardware TPC/LDPC Codec Board (Base to 5 Mbps)

ACCESSORIES

CRS-150 1:1 Modem Redundancy Switch

CRS-300 1:N Modem Redundancy Switch

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