Comtech EF Data LPOD Bedienungsanleitung PDF herunterladen (Seite 5)

Output Impedance &

Return Loss

50-180 MHz: 50 /75 , 16 dB minimum return

loss (18 dB typical), BNC connector

950-2000 MHz: 50 , 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

BUC Power Supply

(HW Option)

24 VDC, 4.17 Amps max., 90 W @ 50° C

48 VDC, 3.125 Amps max., 150 W @ 50° C

(180 W @ 30° C)

Supplied through TX IF center conductor and

selectable on/off via M&C control.

Demodulator

Input Power Range,

Desired Carrier

50-180 MHz: -105 + 10 log (symbol rate) to

-70 + 10 log (symbol rate) dBm

950-2000 MHz: -130 + 10 log (symbol rate)

to -80 + 10 log (symbol rate) dBm

Max Composite

Operating Level

50-180 MHz:

94 – 10 log (symbol rate, desired carrier)

dBc, +10 dBm max., with the additional

requirement that within ± 10 MHz of the

desired carrier the composite power is

≤ +30 dBc

950-2000 MHz

102 – 10 log (symbol rate, desired carrier)

dBc, +10 dBm max., with the additional

requirement that within ± 10 MHz of the

desired carrier the composite power is

≤ +30 dBc

Absolute Maximum +20 dBm

Adaptive Equalizer 5-tap design, selectable on/off

Acquisition Range Programmable in 1kHz increments

Below 64 ksymbols/sec ± 1 kHz to ± (Rs/2) kHz, where Rs = symbol

rate in ksymbols/sec

Between 64 and

389 ksymbols/sec

± 1 kHz to ± 32 kHz

Above 389 ksymbols/sec ± 1 kHz to ± (0.1 * Rs) kHz, up to a

maximum of ± 200 kHz

Acquisition Time Highly dependent on data rate, FEC rate,

and demodulator acquisition range.

E.g.: 120 ms average at 64 kbps, R1/2

QPSK, ± 10 kHz acquisition sweep range,

6 dB Eb/No

Plesiochronous/

Doppler Buffer

Selectable from 64 to 262,144 bits, in 16-bit

steps (Additional limitations for G.704 frame

boundaries)

Receive Clock RX satellite, TX terrestrial, external

reference

Clock Tracking

 100 ppm minimum

LNB Reference (10 MHz) Via RX IF center conductor, 10.0 MHz

± 0.06 ppm (with internal reference),

selectable on/off, -3.0 dBm ± 3 dB

LNB Voltage Selectable on/off, 13 VDC, 18 VDC per

DiSEq 4.2 and 24 VDC at 500 mA maximum

Monitor Functions E

estimate, corrected BER, frequency

offset, buffer fill state, receive signal level

DoubleTalk Carrier-in-Carrier

Delay Range 0 to 330 ms

Power Spectral Density

Ratio

(Interferer to Desired)

BSPK/QPSK/8-PSK/8-QAM: –7 dB to

+11 dB

16-QAM: -7 dB to +7 dB

Maximum Symbol Rate

Ratio

3:1 (TX:RX or RX:TX)

Eb/No Degradation

0 dB Power Spectral Density Ratio

BPSK/QPSK/OQPSK: 0.3 dB

8-QAM: 0.4 dB

8-PSK: 0.5 dB

16-QAM: 0.6 dB

+10 dB power spectral density ratio

Additional 0.3 dB

Satellite Restrictions

Satellite in “loop-back” mode (i.e., the

transmit station can receive itself)

“Non-processing” satellite (i.e., does not

demodulate or remodulate the signal)

Available Options

Hardware 100 – 240 VAC, 175 W AC primary power supply

Hardware -48 VDC, 125 W primary power supply

Hardware 24 VDC, 90 W @ 50° C BUC power supply, AC or DC

primary power supply

Hardware 48 VDC, 150 W @ 50° C (180 W @ 30° C) BUC power

supply, AC or DC primary power supply

Hardware Integrated TPC (2

generation) and LDPC Codec module

Hardware DoubleTalk Carrier-in-Carrier module

Hardware VersaFEC Codec module

Hardware IP Packet Processor

FAST L-Band IF (in addition to 70/140 MHz)

FAST Modem data rate – 10 Mbps, 15 Mbps,

20 Mbps or 25 Mbps

FAST 8-PSK and 8-QAM modulation (8-QAM requires

TPC/LDPC or VersaFEC Codec)

FAST 16-QAM modulation

FAST TPC/LDPC Codec data rate – 10 Mbps, 15 Mbps,

20 Mbps or 25 Mbps

FAST DoubleTalk Carrier-in-Carrier license (full) – 512 kbps,

1.1 Mbps, 2.5 Mbps, 5 Mbps,

10 Mbps, 15 Mbps, 20 Mbps or 25 Mbps

FAST DoubleTalk Carrier-in-Carrier license (fractional)

2.5 Mbps, 5 Mbps, 10 Mbps, 15 Mbps, 20 Mbps or

25 Mbps

FAST VersaFEC Codec data rate (CCM) – 2.5 Mbps, 5 Mbps or

16 Mbps

FAST VersaFEC Codec symbol rate (ACM) – 300 ksps,

1.2 Msps or 4.1 Msps

FAST Open network – IBS with high rate IBS ESC, IDR and

audio

FAST D&I / D&I++ for single Port T1/E1

FAST D&I++ For Quad E1 Port 2, 3 and 4

FAST Quality of Service (requires IP Packet Processor)

FAST Header Compression (requires IP Packet Processor)

FAST Payload Compression (requires IP packet processor)

Accessories

CRS-170A 1:1 Modem Redundancy Switch (L-Band)

CRS-180 1:1 Modem Redundancy Switch (70/140 MHz)

CRS-300 1:10 Modem Redundancy Switch

(Not available with IP Packet Processor)

CRS-280 1:10 IF Redundancy Switch (70/140 MHz)

CRS-280L 1:10 IF Redundancy Switch (L-Band)

CRS-500 1:N Modem Redundancy System

(For use with IP Packet Processor Only)

CRS-282XXX 1:10 IF Redundancy Switch

(For use with CRS-500)

Environmental And Physical

Temperature Operating: 0 to 50ºC (32 to 122°F)

Storage: -25 to 85ºC (-13 to 185ºF)

Power Supply 100 – 240 VAC, +6%/-10%, 50/60 Hz, auto

sensing

-48 VDC (HW option)

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