Comtech EF Data CDM-760 - Manual (Page 38)

Introduction Revision 2
CDM-760 Advanced High-Speed Trunking Modem MN-CDM760
1–12
1.3.6 Demodulator (Dual IF)
70 / 140 MHz
Impedance / Connector
Desired Carrier Input Power
Maximum Composite Level
50 to 180 MHz in 100 Hz steps
75 Ω / BNC Female. Return loss 15 dB min
Min. = -58 +10
log
(SR in Msps) dBm.
Max. = -23 + 10
log
(SR in Msps) dBm, See Figure 1-5
+10 dBm
L-Band
Impedance / Connector
Desired Carrier Input Power
Maximum Composite Level
950-2150 MHz in 100 Hz steps, demodulator
50Ω, Type N Female. Return loss 10 dB min
Min. = -70 + 10
Log
(SR in Msps) dBm .
Max. = -20 + 10
Log
(SR in Msps) dBm , See Figure 1-6
+20 dBm
Acquisition Range For SR < 1Msps, +/- 0.1 * SR, For SR >= 1 Msps, +/- 100 KHz
Figure 1-5. 70/140 MHz Input Level vs. Symbol Rate
Figure 1-6. L-Band Input Level vs. Symbol Rate