Comtech EF Data CDM-IP 300L - Manual (Page 54)

CDM-IP 300L IP-Centric Satellite Modem Rev. 1
CD/CDMIP300L.IOM
26
Outdoor Unit (ODU) Supply Voltage.
Supplied through TX IF center conductor
and selectable On/Off via M&C control. Standard unit is with no ODU supply. Optional ODU
supplies:
24 VDC, 4.0 Amps maximum, universal AC input 100
W supply
48 VDC, 3.0 Amps maximum, universal AC input 150
W supply
ODU 10 MHz Reference On center conductor of output Type N connector at 0 ±
3 dBm. Programmable On/Off.
Outdoor Unit Current Min/Max programmable current limit and alarm if
current falls outside the programmable threshold.
Outdoor Unit M&C FSK TX and RX for M&C of the SierraCom or Herley
BUC.
Spectral Sense Normal or Inverted
Test Modes, Carrier CW Offset: single sideband
Dual: dual sideband
Table 3. Demodulation Specifications
Receive Specifications
Input Connector Type N Female
Input Impedance 50 Ω
Input Return Loss ≥ 10 dB
Minimum Input Level, Desired Carrier -135 dBm + 10*Log (Symbol Rate), see curve
Input Level AGC 50 dBc, see curve
Input Composite Power:
Symbol Rate > 64 Ksym/s
<
64 Ksym/s
Absolute maximum
+30 dBc within 10 MHz of desired
+40 dBc with respect to receive signal
+50 dBc with respect to receive signal
-5 dBm
Acquisition Range ± 500 kHz, programmable in 1Hz increments.
BER Performance
(BER vs Eb/N0)
See BER performance tables
Notes: BER specified is based upon SDM 300L3
Adjacent Carrier Performance The modem BER will be degraded less than 0.5 dB
with the following receive signal:
Two like-modulated carriers spaced 1.3 times the
symbol rate from the receive frequency, and/or 1.2