Comtech EF Data CDM-500 Uživatelský manuál stáhnout pdf (Strana 3)

www.comtechefdata.com

SYSTEM SPECIFICATIONS

Data Rate 18 kbps to 25 Mbps, in 1 bps steps

(Modulation, FEC & Data Interface dependant)

Symbol Rate 18 ksps to 12.5 Msps

Operating Frequency 50 – 180 MHz (Standard) AND 950 – 2000 MHz (Option), 100 Hz

Resolution, Independent TX and RX operation

Major Operating Modes

(See User Manual For Details)

Open Network, per IESS-308 / 309 / 310 / 314

Transparent, Closed Network per IESS-315

LDPC / TPC Codec (Optional Plug-in Module)

VersaFEC Codec (Optional Plug-in Module) with Adaptive Coding

& Modulation or Constant Coding & Modulation

EDMAC Framed with/without AUPC

RS Outer Codec

High Rate ESC / Enhanced ESC (ESC++)

Drop & Insert (D&I) /Enhanced D&I++

Quad E1 Drop & Insert (QDI)

DoubleTalk Carrier-in-Carrier (Optional Plug-in Module)

FEC Options

None Uncoded BPSK/QPSK/OQPSK

Viterbi: k=7, per IESS-308/309

Rate 1/2 BPS/QPSK/OQPSK

Rate 3/4 QPSK/OQPSK

Rate 7/8 QPSK/OQPSK

Viterbi with Reed Solomon Rate 3/4 16-QAM

Rate 7/8 16-QAM

Sequential See CDM-625 User Manual for details

Reed Solomon Open Network and Closed Network modes

TCM (Per IESS-310) 8-PSK/TCM Rate 2/3

Integrated LDPC and TPC (2

Gen) Codec (Optional Plug-in

Module)

LDPC Code Rates

Rate 1/2 BPSK/QPSK/OQPSK

Rate 2/3 QPSK/OQPSK/8-PSK/8-QAM

Rate 3/4 QPSK/OQPSK/8-PSK/8-QAM/16-QAM

TPC Code Rates

Rate 5/16 BPSK

Rate 21/44 BPSK/QPSK/OQPSK

Rate 3/4 QPSK/OQPSK/8-PSK/8-QAM/16-QAM

Rate 7/8 QPSK/OQPSK/8-PSK/8-QAM/16-QAM

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

VersaFEC Codec

(Optional Plug-in Module)

BPSK Rate 0.488

QPSK Rate 0.533, 0.631, 0.706, 0.803

8-QAM Rate 0.642, 0.711, 0.780

16-QAM Rate 0.731, 0.780, 0.829, 0.853

Scrambling IDR Mode, no RS, – per ITU V.35 (Intelsat variant)

IBS mode, no RS – per IESS-309, externally frame synchronized

Transparent Closed Network mode, no RS or TPC/LDPC – per

ITU V.35 (Intelsat variant)

EDMAC mode, no RS coding – externally frame synchronized

(proprietary)

TPC/LDPC modes – externally frame synchronized (proprietary)

All RS modes – externally frame synchronized per

IESS-308/309/310

Management 10/100 BaseT Ethernet with SNMP, HTTP and Telnet support,

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

Form C Relays Hardware fault, Rx and Tx Traffic Alarms, Open Network

Backward Alarms

External Reference

(Input OR Output)

BNC Connector

Input

: 1, 2, 5, or 10 MHz, -6 dBm to +10 dBm, 50Ω/75Ω (nominal)

Output: 10 MHz, 2.7 V peak-to-peak ± 0.4 V, Low Impedance

Output

DATA INTERFACES

EIA-422/-530 DCE , Up to 14 Mbps

25-pin D-sub (Female)

V.35 DCE , Up to 14 Mbps

LVDS Serial , Up to 25 Mbps 25-pin D-sub (Female)

HSSI Serial , Up to 25 Mbps

G.703 T1, 1.544 Mbps (Balanced 100 Ω)

9-pin D-sub (Female)

BNC (Female)

G.703 T2, 6.312 Mbps

(Unbalanced 75 Ω or balanced 110 Ω)

G.703 E1, 2.048 Mbps

(Unbalanced 75 Ω or balanced 120 Ω)

G.703 E2, 8.448 Mbps (Unbalanced 75 Ω)

ASI , Up to 25 Mbps BNC (Female)

Additional 2.048 Mbps E1 Ports for Quad-E1

(Balanced 120 Ω)

9-pin D-sub (Female)

Overhead Data 44-pin High-density D-sub (Male)

Modem Alarms 15-pin D-sub (Male)

4-port 10/100 BaseT Managed Ethernet Switch 4 x RJ-45

MODULATOR

Frequency Stability ± 0.06 ppm (± 6 x 10

-8

), 0° to 50°C (32° to 122° F) with Internal

Reference

Transmit Filtering Per IESS-308

Transmit Filter Rolloff 25%, 35%

Harmonics and Spurious Better than -60 dBc/4 kHz (typically <-65 dBc/4kHz)

Measured from 1 to 500 MHz (50-180 MHz band)

Measured F

± 500 MHz (950-2000 MHz band)

Transmit On/Off Ratio -60 dBc minimum

Output Phase Noise < 0.480° rms double sided, 100 Hz to 1MHz

(Minimum 16 dB better overall than the INTELSAT IESS-308/309

requirements)

dB/Hz

Frequency Offset

-63.0 100 Hz

-73.0 1 kHz

-83.0 10 kHz

-93.0 100 kHz

Fundamental AC line spurious is -42 dBc or lower

The sum of all other single sideband spurious, from 0 to 0.75 x

symbol rate, is -48 dBc or lower

Output Power 50-180 MHz: 0 to -25 dBm, 0.1 dB steps

(0 to -20 dBm in CDM-600 emulation mode)

950-2000 MHz: 0 to -40 dBm, 0.1 dB steps

(0 to -45 dBm in CDM-600L emulation mode, but power accuracy

and spurious only guaranteed to -40 dBm)

Power Accuracy 50-180 MHz:

± 0.5 dB over frequency, data rate, modulation type and

temperature range of 15 to 35° C

± 0.8 dB over frequency, data rate, modulation type and

temperature range of 0 to 50° C

950-2000 MHz

± 0.7 dB over frequency, data rate, modulation type and

temperature range of 15 to 35° C

± 1.0 dB over frequency, data rate, modulation type and

temperature range of 0 to 50° C

Output Impedance & Return

Loss

50-180 MHz: 50Ω/75Ω, 16 db minimum return loss

(18 dB typical), BNC Connector

950-2000 MHz: 50Ω, 19 db minimum return loss

(21 dB typical), Type-N Connector

Clocking Options Internal, ± 0.06 ppm (SCT)

External, locking over a ± 100 ppm range (TT)

Loop timing (Rx satellite clock) – supports asymmetric operation

External Clock

External Tx Carrier Off By TTL ‘low’ signal or external contact closure

BUC Reference

(10 MHz)

Via TX IF center conductor, 10.0 MHz ± 0.06 ppm (With internal

reference), selectable ON/OFF, 0.0 dBm ± 3 dB

1 2 3 4

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