Digisat CDM-570/L 매뉴얼 - 페이지 3

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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

2.4 kbps to 9.98 Mbps (depending on modulation,

(See user manual for

FEC and framing), 1 bps step with fully independent

details)

TX and RX rates

Modulation & FEC

5/16 BPSK TPC

21/44 BPSK TPC

1/2 BPSK

1/2 QPSK/OQPSK

3/4 QPSK/OQPSK

7/8 QPSK/OQPSK

2/3 8PSK TCM

21/44 QPSK/OQPSK TPC

3/4 QPSK/OQPSK TPC

7/8 QPSK/OQPSK TPC

0.95 QPSK/OQPSK TPC

3/4 8PSK/8-QAM TPC

7/8 8PSK/8-QAM TPC

0.95 8PSK/8-QAM TPC

3/4 16-QAM TPC

7/8 16-QAM TPC

Uncoded BPSK

Uncoded QPSK/OQPSK

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

operating in non-Vipersat mode

Scrambling

FEC Options

Viterbi

Rate 1/2 BPSK, QPSK/OQPSK

Rate 3/4 and 7/8 QPSK/OQPSK

and 16-QAM w/RS

TCM

8PSK 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,

8PSK/8-QAM and 16-QAM

Rate 0.95 QPSK/OQPSK and 8PSK/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 n, BNC connector

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

50 n, 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

±1 ppm, 0º to 50ºC

Frequency Stability

(32º to 122ºF)

Output Power

0 to –25 dBm, 0.1 dB

steps

± 0.5 dB over frequency

Accuracy

and temperature

Phase Noise

< 0.75 degrees RMS

double-sided,

100 Hz to 1 MHz

Output Spectrum/

Meets IESS-308/-309 power spectral mask

Filtering

< -55 dBc/4 kHz

Harmonics and Spurious

(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)

Data Rate Range

2.4 kbps to 0.937 Mbps

2.4 kbps to 1.430 Mbps

2.4 kbps to 1.500 Mbps

4.8 kbps to 3.000 Mbps

7.2 kbps to 4.500 Mbps

8.4 kbps to 5.250 Mbps

8.7 kbps to 4.400 Mbps

4.8 kbps to 2.860 Mbps

7.2 kbps to 4.500 Mbps

8.4 kbps to 5.250 Mbps

9.1 kbps to 5.666 Mbps

10.8 kbps to 6.750 Mbps

13.6 kbps to 7.875 Mbps

15.3 kbps to 8.500 Mbps

14.4 kbps to 9.000 Mbps

16.8 kbps to 9.980 Mbps

4.8 kbps to 3.000 Mbps

9.6 kbps to 5.000 Mbps

Mode dependent – ITU V.35, or proprietary

externally synchronized

CDM-570L &

CDM-570L-IP

±0.06 ppm, 0º to 50ºC

(32º to 122ºF)

0 to –40 dBm, 0.1 dB

steps

± 1.0 dB over frequency

and temperature

< 1.2 degrees RMS

double-sided,

100 Hz to 1 MHz

Demodulator

CDM-570 &

CDM-570-IP

Input Power Range

-30 to -60 dBm

Max Composite Level

+35 dBc, up to

-5 dBm absolute max.

± 1 to ± 32 kHz,

Acquisition Range

1 kHz step

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)

± 100 ppm minimum

Clock Tracking

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,

1/2

3/4

QPSK/OQPSK

-5

5.4 (4.9)

6.8 (6.3)

-7

6.7 (6.2)

8.2 (7.7)

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

BPSK,

1/2

3/4

QPSK/OQPSK

-5

4.3 (4.0)

5.6 (4.7)

-7

4.5 (4.2)

6.0 (5.2)

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

-6

2.9 (2.6)

3.8 (3.4)

-8

3.3 (2.8)

4.4 (4.0)

8PSK

3/4

7/8

-6

6.2 (5.8)

7.0 (6.6)

-8

6.8 (6.3)

7.2 (6.8)

8-QAM

3/4

7/8

-6

6.5 (6.1)

6.6 (6.2)

-8

7.2 (6.8)

6.8 (6.4)

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)

Low-Noise Block Converter (LNB) Support

(CDM-570L & CDM-570L-IP Only)

LNB Voltage

+13, +18, and +24 VDC @ 500 mA maximum

LNB Reference

10 MHz via RX center conductor,

-3 dBm ± 3 dB

Block Up Converter (BUC) Support

(CDM-570L & CDM-570L-IP Only)

BUC Voltage

24 VDC, 90 W @ 50°C, 100 W @ 30°C

(internally fitted option)

48 VDC, 150 W @ 50°C, 180 W @ 30°C

(internally fitted option, not available with -24 VDC

input)

BUC Reference

10 MHz via TX center conductor,

0 dBm ± 3 dB

FSK Support

Via TX center conductor with FSK BUCs

CDM-570L &

CDM-570L-IP

-130 + 10 log symbol rate,

dBm (minimum)

-90 + 10 log symbol rate,

dBm (maximum)

+40 dBc, up to

-10 dBm absolute max.

± 1 to ± 32 kHz,

1 kHz step, symbol rate <=

625 ksps

± 1 to ± 200 kHz,

1 kHz step, symbol rate >

625 ksps

7/8

7.7 (7.2)

9.0 (8.6)

7/8

6.5 (6.0)

6.9 (6.5)

7/8

0.95

4.3 (4.0)

6.4 (6.0)

4.5 (4.2)

6.9 (6.5)

0.95

9.3 (8.9)

10.3 (9.9)

0.95

9.6 (9.2)

10.6(10.2)