Comtech EF Data LCS-4 - Manual (Page 85)

Appendix B. SPECIFICATIONS
B.1 G
ENERAL
S
PECIFICATION
Table B-1. General Specification
System Specification
Operating Frequency Range 950 to 1950 MHz
TX IF Connector:
Modulator Side
BUC Side
Type N, Female, 4 combined inputs
Type N, Female, 2 switched outputs, 1 ON at a time
TX IF Impedance/Return Loss 50 Ω/10 dB minimum
TX Input Level, Modulator Side 0 to –40 dBm, operating per port, +10 dBm maximum per port
TX Uplink Power Control (UPC) Access Input and output SMA female connectors. Routes composite
modulator signals through UPC equipment then back to LCS-4
for external power leveling.
TX UPC Signal Level Combined TX input level –7 dB typical both connections
Isolation TX input to unselected output 50 dB minimum
TX input or TX output to RX Output 90 dB minimum.
TX Gain, Combiner Input to TX Output -10 dB maximum loss
TX Gain, Balance Adjust TX Level to BUC AB is adjustable ± 3 dB minimum with respect
to BUC A level in approx 0.1 dB increments.
TX Gain, Balance Control Control is via a momentary center OFF SPDT switch or M&C.
TX 3 rd Order Products (2-tone) -55 dBc for two CW carriers at the TX Output each –6 dBm.
TX 2 nd Order Products (2-tone) -55 dBc for two CW carriers at the TX Output each –6 dBm.
RX IF Impedance/Return Loss 75 Ω/10 dB minimum 950 to 1750 (2150 goal) MHz
RX IF Connector:
LNB Side
Demodulator Side
Type F, Female, 2 switched inputs, 1 ON at a time
Type F, Female, 4 outputs from a power splitter
RX Input Level, LNB Side -90 to –5 dBm, operating, +10 dBm maximum composite
Gain RX In/Out 0 ± 3 dB
RX 3 rd Order Products (2-tone) -30 dBc for two CW carriers at the RX Output each +7 dBm
RX 2 nd Order products (2-tone) -40 dBc for two CW carriers at the RX Output each +7 dBm
Isolation 50 dB unused RX input to splitter output
Internal Frequency Reference:
Calibration
Frequency
Stability
Internal reference adjustable
± 1 kHz
10.0 MHz
± 0.02 ppm
Phase Noise db/Hz
-80
-110
-135
-140
-150
-150 Frequency Offset
1 Hz
10 Hz
100 Hz
1 kHz
10 kHz
100 kHz
B-1