Comtech EF Data Vipersat CDM-570L Instrukcja Użytkownika Pobierz pdf (Strona 3)

Sandpiper House, Aviary Court, Wade Road, Basingstoke, Hampshire, RG24 8GX, UK

T +44 (0) 1256 812 222 F +44 (0) 1256 812 666 E [email protected]

www.sematron.com

Making waves...

Datasheet

Rev A. Jan 11.

Specifications

Frequency Range CDM-570 & CDM-570-IP: 50 to 90 or

100 to 180 MHz, 100 Hz resolution

CDM-570L & CDM-570L-IP:

950 to 2000 MHz, 100 Hz resolution

Data Interfaces

EIA-422/-530 DCE, V.35 DCE, Sync EIA-232,

10/100Base-T Ethernet (option), G.703 T1 balanced

(option), G.703 E1 balanced or unbalanced (option)

Data Rate Range

(See user manual for

details)

2.4 kbps to 9.98 Mbps (depending on modulation,

FEC and framing), 1 bps step with fully independent

TX and RX rates

Modulation & FEC

Data Rate Range

5/16 BPSK TPC

2.4 kbps to 0.937 Mbps

21/44 BPSK TPC 2.4 kbps to 1.430 Mbps

1/2 BPSK

2.4 kbps to 1.500 Mbps

1/2 QPSK/OQPSK

4.8 kbps to 3.000 Mbps

3/4 QPSK/OQPSK

7.2 kbps to 4.500 Mbps

7/8 QPSK/OQPSK 8.4 kbps to 5.250 Mbps

2/3 8-PSK TCM

8.7 kbps to 4.400 Mbps

21/44 QPSK/OQPSK TPC

4.8 kbps to 2.860 Mbps

3/4 QPSK/OQPSK TPC

7.2 kbps to 4.500 Mbps

7/8 QPSK/OQPSK TPC 8.4 kbps to 5.250 Mbps

0.95 QPSK/OQPSK TPC

9.1 kbps to 5.666 Mbps

3/4 8-PSK/8-QAM TPC

10.8 kbps to 6.750 Mbps

7/8 8-PSK/8-QAM TPC

13.6 kbps to 7.875 Mbps

0.95 8-PSK/8-QAM TPC

15.3 kbps to 8.500 Mbps

3/4 16-QAM TPC 14.4 kbps to 9.000 Mbps

7/8 16-QAM TPC

16.8 kbps to 9.980 Mbps

Uncoded BPSK

4.8 kbps to 3.000 Mbps

Uncoded QPSK/OQPSK

9.6 kbps to 5.000 Mbps

Note: Data rate specifications reflect CDM-570/L or CDM-570/L-IP modem

operating in non-Vipersat mode

Scrambling Mode dependent – ITU V.35, or proprietary

externally synchronized

FEC Options

Viterbi Rate 1/2 BPSK, QPSK/OQPSK

Rate 3/4 and 7/8 QPSK/OQPSK

and 16-QAM w/RS

TCM 8-PSK 2/3

(Closed network – not IESS-310)

Turbo Product Coding Rate 21/44 BPSK, 5/16 BPSK,

Rate 21/44 QPSK/OQPSK

Rate 3/4 and Rate 7/8 QPSK/OQPSK,

8-PSK/8-QAM and 16-QAM

Rate 0.95 QPSK/OQPSK and 8-PSK/8-QAM

Reed-Solomon Proprietary 220/200 and 200/180

modes available

Uncoded

BPSK, QPSK/OQPSK

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

Ethernet 10/100Base-T (dependent on operational mode)

Input/Output Impedance CDM-570 & CDM-570-IP: matched for

50/75 Ω, BNC connector

CDM-570L & CDM-570L-IP: transmit and receive

Ω

, female Type N connector

External Reference Input

1, 2, 5, 10 or 20 MHz, BNC connector

Form C Relays TX, RX traffic alarms and unit faults

Modulator

CDM-570 &

CDM-570-IP

CDM-570L &

CDM-570L-IP

Frequency Stability

±1 ppm, 0º to 50ºC

(32º to 122ºF)

±0.06 ppm, 0º to 50ºC

(32º to 122ºF)

Output Power 0 to –25 dBm, 0.1 dB

steps

0 to –40 dBm, 0.1 dB

steps

Accuracy

± 0.5 dB over frequency

and temperature

± 1.0 dB over frequency

and temperature

Phase Noise < 0.75 degrees RMS

double-sided,

100 Hz to 1 MHz

< 1.2 degrees RMS

double-sided,

100 Hz to 1 MHz

Output Spectrum/

Filtering

Meets IESS-308/-309 power spectral mask

Harmonics and Spurious

< -55 dBc/4 kHz

(typically < -60 dBc/4 kHz)

Transmit On/Off Ratio 55 dB minimum

External TX Carrier Off

By TTL LOW signal, or RTS

TX Clock Options Internal (SCT), external (TT), loop timing with

symmetric or asymmetric operation (data interface

dependent)

Demodulator

CDM-570 &

CDM-570-IP

CDM-570L &

CDM-570L-IP

Input Power Range -30 to -60 dBm -130 + 10 log symbol rate,

dBm (minimum)

-90 + 10 log symbol rate,

dBm (maximum)

Max Composite Level +35 dBc, up to

-5 dBm absolute max.

+40 dBc, up to

-10 dBm absolute max.

Acquisition Range

± 1 to ± 32 kHz,

1 kHz step

± 1 to ± 32 kHz,

1 kHz step, symbol rate <=

625 ksps

± 1 to ± 200 kHz,

1 kHz step, symbol rate >

625 ksps

Acquisition Time Highly dependent on data rate, FEC rate, and

demodulator acquisition range. Example:

120 ms average at 64 kbps, Rate 1/2 QPSK, ± 10 kHz

acquisition sweep range, 6dB Eb/No

Receive Buffer

512, 1024, 2048, 4096, 8182, or 16384 bits

Receive Clock Options Buffer disabled (RX satellite), buffer enabled

(symmetric or asymmetric operation) (data interface

dependent)

Clock Tracking

± 100 ppm minimum

Monitor Functions E

, frequency offset, BER, buffer fill status, RX

signal level

Example BER Performance

For symbol rates up to 2.5 Msps (See user’s manual for higher symbol rates).

Guaranteed E

, in dB (typical values in parentheses) with two adjacent carriers 7

dB higher. (See the user’s manual for a complete listing of the performance of all

FEC types, code rates, and modulation types.)

Viterbi

BPSK,

QPSK/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)

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

BPSK,

QPSK/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)

Vipersat Operation Mode

Vipersat operation is enabled via a FAST feature code. Networks can easily start off in point-to-point or point-to-multipoint configurations.

As the network grows and users wish to take advantage of the bandwidth on-demand savings by implementing a Vipersat network,

modems can easily be upgraded to Vipersat mode. Vipersat mode provides for the ability to operate in the following modulation/FEC

rates:

STDMA QPSK, Rate 3/4 Turbo FEC – all STDMA modes

Data Rate Range: 64 kbps – 4.5 Mbps

BPSK, Rate 5/16 Turbo FEC – Entry Channel Mode only

Data Rate Range: 32 kbps to 937 kbps

SCPC

All Turbo Product Code FEC rates as detailed in the following specifications

1 2 3 4

Datasheet 1

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