70/140 Mhz Modulator - Comtech EF Data CDM-710 Installation And Operation Manual

CDM-710 Broadcast Satellite Modem
Summary of Specifications
8.3

70/140 MHz Modulator

Description
Frequency
Impedance
Connector
Return Loss
Output Power
Output Power Accuracy
Output Power Stability
Carrier Mute
Harmonics and Spurious
Integrated Phase Noise
Spectral Inversion
Quadrature Phase Error
Quadrature Amplitude
Imbalance
Carrier Null
Combined Amplitude
Imbalance and Quadrature
Phase Error
52 to 88 MHz or 104 to 176 MHz in 100Hz steps. Bandwidth of transmitted spectrum is
within IF frequency range.
75 or 50 , programmable
BNC Female
18 dB
0 to -20 dBm in 0.1 dB steps.
Carrier is not interrupted when changing between output power levels or removing data
connections.
0.5 dB at 25 C
Within 0.5 dB of 25C value over all specified environments
55 dB below main carrier output
-55 dBc/4 kHz over operating frequency range (excludes spectral mask area) and is with a
modulated carrier
-55 dBc/4 kHz 10 to 52 MHz, 176 to 250 MHz
Continuous component < 1 degrees RMS double-sided, 100 Hz to 10 MHz
Normal or Inverted
< 2
0.2 dB maximum
35 dB below an unmodulated carrier
Single sideband test with suppressed sideband 35 dB minimum below unmodulated carrier
8–3
Requirements
Revision 9
MN/CDM710.IOM