Comtech EF Data SNM-1001L - Manual (Page 319)

SNM-1001L Satellite Modem Revision 1
Burst Mode Modulator Operation MN/SNM1001L.OM
C–5
C.2.13 Spurious Emissions
Spurious emissions are measured relative to the power of the modulated carrier. The
measurement is done with the carrier on in continuous mode and modulated by the correct
data/clock signal. Spurious emissions measured in a 3 kHz bandwidth at the transmit IF output
are:
0 to 500 MHz (-5 to -30 dBm) -55 dBc
0 to 500 MHz (+5 to -20 dBm > 64 kbps) -50 dBc
0 to 500 MHz (+5 to -20 dBm < 64 kbps) -45 dBc
C.2.14 Modulator Phase Error
The modulator will have less than 2 ° of phase error
C.2.15 Transmit IF Test Modes
The following transmit IF test modes are available to the operator. Spurious emissions in the
following test modes will be
≤ -30 dBc.
TX IF Test Modes Remarks
CW: Outputs a single carrier at the defined frequency
Offset: Dual sideband signal with lower sideband and carrier suppressed
≤ -35 dBc
Dual sideband: Suppressed carrier ≤ -35 dBc
C.2.16 Modulator Spectrum Rotation
The operator can select normal or inverted spectrum of the Modulator Output.