Comtech EF Data SNM-1010L - Manual (Page 29)

SNM-1010L Data/Control Modem Revision 0
Introduction MN/SNM1010L.OM
1.6 Demodulator Specifications
Parameter Remarks
Input Frequency 950 to 1750 MHz, in 100 Hz steps
Minimum Input Power
(Desired Carrier) +10 log (symbol rate) – 135 dBm
AGC Range 50 dB above minimum input level
Composite to Desired Carrier +30 dBc within 10 MHz of desired carrier
+40 dBc, > 64 ksym/s
+50 dBc, < 64 ksym/s
Composite Level, Maximum -5 dBm
Input Impedance, Return Loss 75 Ω > 10 dB
Input Connector Type F (Female)
Carrier Acquisition Range ±500 kHz, in 1 Hz steps
Acquisition Time < 1 second at 64 kbps, R=1/2
Sweep Reacquisition 0 to 999 seconds, in 1 sec steps
Buffer Clock TX, Recovered RX, Internal, External
Plesiochronous Buffer 32 to 262122 bits, in 16-bit steps
LNB Voltage On or Off
+13 and +18 per DiSEqC4.2
+24 VDC at 500 mA maximum
LNB Current Programmable MIN and MAX current alarms
LNB Reference
(Center pin of IF Input Connector) On or Off
10 MHz
± 0.02 ppm at –6 to +0 dBm
1.7 DAC Specifications
The DAC performs all of the DAMA control functions for the remote site. The DAC
provides a set of interfaces for communicating with an operator for data call requests,
etc., and for controlling external traffic modems. The DAC communicates with the NMS
for call control and M&C. For additional information, refer to Chapter 6.
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