Comtech EF Data SDM-300L3 - Manual (Page 310)

SDM-300L3 Satellite Modem Revision 0
Specifications MN/SDM300L3.IOM
14–4
14.3 L-Band Modulator Specification Summary
Table 14-2. L-Band Modulator
Transmit Specifications
Output Connector
Type N Female
Frequency Stability ± 0.02 ppm
Optional: ± 1.0 ppm
Output Power Range 0 to -40 dBm in 0.1 dB steps
Output Power Accuracy ± 1.5 dB
Output Power Stability versus
Temperature ± 1.0 dB
Output Power Offset Adds offset of –99.0 to +99.0 dB in 0.1 dB steps to displayed IF
output power.
Output Impedance 50 Ω
Output Return Loss ≥ 14 dB
Output Noise Floor -130 dBc/Hz (20 MHz from carrier)
Output Phase Noise see 15.5.6 Modulator Phase Noise
Spurious Emissions -55 dBc, 55 to 2000 MHz in 4 kHz bandwidth
Carrier Suppression < -30 dBc (test mode)
Harmonics of modulated carrier < -55 dBc
Output Unit Reference:
Frequency
Stability
Power Level
Phase Noise
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 Frequency Offset
-110 10 Hz
-135
100 kHz
-140 1 kHz
-150 10 kHz
-150 100 kHz
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 Terrasat BUC.
Note: Refer to Chapter 16 for BUC/FSK Communications.
Spectral Sense Normal or Inverted
Test Modes Pattern Generator Inserts 2047 data pattern in place of TX data stream, with optional
Overhead Card.
Test Modes, Carrier CW Offset: single sideband
Dual: dual sideband