Comtech EF Data CDM-Qx Manual de usuario descargar pdf (Pagina 3)

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SYSTEM SPECIFICATIONS

Input/Output

Impedance

75Ω (Optional 50Ω)

IF Connectors BNC female

Data Rate

(See Manual)

128 kbps to 20 Mbps (plus limited capability

down to 32 kbps), in 1 bps steps within

symbol rate range, data interface

dependant

Symbol Rate 128 ksps to 10 Msps (plus limited capability

down to 32 kbps)

Scrambling IV.35, or synchronous

FEC Viterbi 1/2, 3/4, 7/8 (QPSK only)

Concatenated Reed-Solomon 2/3 8-PSK,

3/4 16 QAM

FEC Options Hardware option only

Turbo Product Coding

(TPC) - 2

Generation

BPSK Rate 21/44 and 5/16

QPSK Rate 21/44, 3/4, 7/8, and 17/18

8-PSK Rate 2/3, 3/4, 7/8, 17/18

16QAM Rate 3/4 and 7/8

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

10/100 Base-T

Form C Relays Tx, Rx traffic alarms and Unit faults

Reference Internal ± 1.0 ppm (standard) or ± 0.1 ppm

(optional), or external 1, 2, 5 or 10 MHz,

BNC Connector

DATA INTERFACE

Data Interfaces RS-422 32 kbps to 12 Mbps

V.35 32 kbps to 12 Mbps

HSSI 32 kbps to 20 Mbps

G.703 T1 and E1, Balanced or Unbalanced

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

Receive Clock

Options

Rx Satellite, Selected Tx Terrestrial,

EXT REF, INT REF

Clock Tracking ± 100 ppm minimum

MODULATOR

Frequency Range 50 to 90 and 100 to 180 MHz,

in 100 Hz steps

Frequency Stability ± 1.0 ppm (standard) or ± 0.1 ppm

(optional),

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 -5 to -25 dBm, 0.1 dB steps,

per Individual modulator

Accuracy ± 2 dB over frequency and temperature

External Carrier Off By TTL low signal

DEMODULATOR

Frequency Range 50 to 90 and 100 to 180 MHz,

in 100 Hz steps

Input Power, Minimum -15 to –45 dBm, < 2 Msps

-15 to –40 dBm, >

2 Msps < 4 Msps

-15 to –35 dBm, > 4 Msps

Automatic Gain

Control

> 30dB

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

Acquisition Range

To ± 32 kHz, programmable, in 1 kHz steps

Carrier in Carrier 64 kbps to 20 Mbps Data Rate Range

128 kbps to 10 Mbps Symbol Rate Range

0 to 330 mS delay

Rx Carrier ± 7 dBc relative to outbound

carrier

Up to 3:1 difference in Output/Input symbol

rates

BER PERFORMANCE

Met with two adjacent carriers 7 dB higher at 1.3 channel spacing

Guaranteed E

, in dB

Consult the CDM-Qx Manual for a comprehensive listing of the

performance of all FEC types, Code Rates, Modulation types, and

Data Rate ranges.

Turbo BPSK QPSK/OQPSK

21/44

5/16 21/44 3/4 7/8 17/18

-6

2.9 2.4 3.5 3.8 4.3 6.8

-8

3.3 2.8 3.6 4.4 4.5 7.4

Turbo

8-PSK 16-QAM

3/4 7/8 17/18 3/4 7/8

-6

6.2 7.0 9.3 7.4 8.1

-8

6.8 7.2 10.3 8.2 8.3

Degradation BPSK, QPSK, and 8-PSK: 0.5 dB max. with

DoubleTalk Carrier-in-Carrier

Equal power in outgoing, incoming, and

adjacent channels

16-QAM:

1.0 dB max. with same test

conditions

Monitor Functions E

, Frequency Offset, BER, Buffer fill

status, Rx signal level, CnC ratio

ENVIRONMENTAL AND PHYSICAL

Temperature Operating: 0 to 50ºC (32 to 122ºF)

Storage: -25 to 85ºC (-13 to 185ºF)

Power Supply 100 to 240 VAC, 50/60 Hz, Auto sensing

Power Consumption < 90 W typical, (Depends on configuration)

Physical Dimensions

(1RU)

1.75H x 19.0W x 19 D inch

(4.4H x 48W x 48D cm) approximate

Weight < 20 lbs (7.0 kg) approximate

(Depends on configuration)

CE Mark EMC

Safety

FCC Compliant

1 2 3 4

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