Comtech EF Data SDR-54A - Manual (Page 61)

Chapter 8. Specifications
8.1 Specifications
Table 8-1. Demodulator Specifications
Parameter Specification
RF Input Frequency Range 950.0 to 1550.0 MHz, in graduated 10 kHz steps
RF Input Level:
Typical
Guaranteed
-90 to -30 dBm
-80 to -30 dBm
Notes:
For symbol rates < 64 kbps, input is –40 dBm max.
For symbol rates > 2048 ks/s, input level is –75 dBm min.
For all other symbols rates, the typical absolute input is
–90 dBm min.
RF Input Impedance 75 Ω with a retun loss of ≥ 8 dB return loss
RF Input Return Loss (950.0 to 1550.0 MHz):
Typical
Guaranteed
>10 dB
> 8 dB
RF Input Connector F type (female)
LNB Power +24 ± 1 VDC (500 mA maximum)
Baseband Filtering 4-Pole Butterworth, EFData Closed, Intelsat open
Demodulation Coherent QPSK and BPSK (selectable)
Acquisition Range 10 kHz to 1 MHz, programmable in 10 kHz increments, range is
rounded to nearest multiple of the operating symbol rate.
Symbol Rate Range (variable) 9.6 to 2500.0 kbps
Data Rate Change (variable):
QPSK
BPSK
9.6 to 4000.0 kbps, in 1.0 bps steps
4.8 to 1250.0 kbps, in 1.0 bps steps
Note: For RS-232 interface, maximum data rate = 64 kbps.
Forward Error Correction Viterbi K = 7 decoder, 1/2 rate, 3/4 rate, and 7/8 rate
Optional: Reed-Solomon IESS308/309 Concatenated 225, 205
T=10
8–1