Phase Noise; Transmit If Output Switch; Transmit If Power; Modulator Power Offset - Comtech EF Data SNM-1001L Installation And Operation Manual

SNM-1001L Satellite Modem
Burst Mode Modulator Operation
C.2.8

Phase Noise

1. The phase noise of the transmit IF output carrier is no worse than:
2. Fundamental AC line spurious is -42 dBc or lower.
3. The sum of all the single sideband spurious, from 0 to 0.75 x symbol rate, is -42 dBc or
C.2.9

Transmit IF Output Switch

When set to off, no signal present at the output is greater than -60 dBm, measured in a 3 kHz
bandwidth from 0 to 500 MHz.
C.2.10

Transmit IF Power

The transmit IF power is operator selectable from -5 to -30 dBm, in 0.1 dB steps, with an
accuracy of ± 0.5 dB. The maximum drift due to temperature change over the specified range is
± 0.5 dB.
As an option the output can be selectable from +5 to -20 dBm, in 0.1 dB steps, with an accuracy
of ± 0.5 dB. The maximum drift due to temperature change over the specified range is ± 0.5 dB.
C.2.11

Modulator Power Offset

An offset to the displayed IF output power may be entered from -99.0 to +99.0 dB, in 0.1 dB
steps.
C.2.12

Modulated IF Output Shape

The modem meets the following transmit output spectral mask specifications. The desired mask
is selectable from the front panel or remotely.
•
•
dBc/Hz
-66.0
-76.0
-86.0
-96.0
-96.0
lower.
INTELSAT/EUTELSAT
Closed net (Comtech EF Data)
Distance from Carrier
100 Hz
1 kHz
10 kHz
100 kHz
1 MHz
C–4
Revision 1
MN/SNM1001L.OM