L-Band Modulator Specification Summary; Table A-2. L-Band Modulator - Comtech EF Data SNM-1001L Installation And Operation Manual

SNM-1001L Satellite Modem
Specifications
A.3

L-Band Modulator Specification Summary

Transmit Specifications
Output Connector
Frequency Stability
Output Power Range
Output Power Accuracy
Output Power Stability versus
Temperature
Output Power Offset
Output Impedance
Output Return Loss
Output Noise Floor
Output Phase Noise
Spurious Emissions
Carrier Suppression
Harmonics of modulated carrier
Output Unit Reference:
Frequency
Stability
Power Level
Phase Noise
Outdoor Unit (ODU) Supply Voltage.
Supplied through TX IF center conductor
and selectable On/Off via M&C control.
ODU 10 MHz Reference
Outdoor Unit Current
Outdoor Unit M&C
Spectral Sense
Test Modes Pattern Generator
Test Modes, Carrier

Table A-2. L-Band Modulator

Type N Female
± 0.02 ppm
Optional: ± 1.0 ppm
0 to -40 dBm in 0.1 dB steps
± 1.5 dB
± 1.0 dB
Adds offset of –99.0 to +99.0 dB in 0.1 dB steps to displayed IF
output power.
50 Ω
≥ 14 dB
-130 dBc/Hz (20 MHz from carrier)
see 3.6.6 Modulator Phase Noise
-55 dBc, 55 to 2000 MHz in 4 kHz bandwidth
< -30 dBc (test mode)
< -55 dBc
On center conductor of L-Band output connector
10.0 MHz ± 0.02 ppm (Optional: 1.0 ppm)
0.0 dBm, ± 3 dBm
dB/Hz
-50
-80
-110
-140
-150
-150
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
On center conductor of output Type N connector at 0 ± 3 dBm.
Programmable On/Off.
Min/Max programmable current limit and alarm if current falls outside
the programmable threshold.
FSK TX and RX for M&C of the SierraCom or Terrasat BUC.
Note: Refer to Chapter 16 for BUC/FSK Communications.
Normal or Inverted
Inserts 2047 data pattern in place of TX data stream, with optional
Overhead Card.
CW Offset: single sideband
Dual: dual sideband
A–3
MN/SNM1001L.IOM
Frequency Offset
1 Hz
10 Hz
100 Hz
1 kHz
10 kHz
100 kHz
Revision 1