Comtech EF Data Vipersat CDM-570L Bedienungsanleitung PDF herunterladen (Seite 3)

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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-IP or CDM-570L-IPEN

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

Ethernet 10/100Base-T

EIA-232, EIA-485 (2- or 4-wire),

(Dependent on operational mode)

Input/Output Impedance

CDM-570-IPEN: Matched for 50/75

Ω

BNC connector

CDM-570L-IPEN: Transmit and Receive

50 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-IPEN

CDM-570L-IPEN

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-IPEN

CDM-570L-IPEN

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

, 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)

Turbo Product Codec

BPSK

5/16

21/44

-6

2.4 (2.1)

2.8 (2.5)

-7

2.6 (2.3)

3.1 (2.8)

-8

2.7 (2.4)

3.3 (2.9)

QPSK/OQPSK

21/44

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)

8-PSK

3/4

7/8

0.95

-6

6.2 (5.8)

7.0 (6.6)

9.3 (8.9)

-8

6.8 (6.3)

7.2 (6.8)

10.3 (9.9)

8-QAM

3/4

7/8

0.95

-6

6.5 (6.1)

6.6 (6.2)

9.6 (9.2)

-8

7.2 (6.8)

6.8 (6.4)

10.6(10.2)

16-QAM

3/4

7/8

-6

7.4 (7.0)

8.1 (7.7)

-7

7.8 (7.3)

8.2 (7.8)

-8

8.2 (7.7)

8.3 (7.9)

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