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CDM-700 High Speed Satellite Modem
Summary of Specifications
10.3 70/ 140 MHz Modulator
Item
IF Frequency
Impedance
Return Loss
IF Connectors
Output Power
Accuracy
Harmonics & Spurs
Phase Noise
External Tx Carrier Off
Quadrature Phase Error
Amplitude Imbalance (I, Q)
Combined Amplitude Imbalance and
Quadrature Phase Error
Carrier Null
Frequency Inversion
10.4 L-Band Modulator
Item
L-Band Frequency
Impedance
Return Loss
IF Connectors
Output Power
Accuracy (Main Output)
Monitor Output
Harmonics & Spurs
Phase Noise
External Tx Carrier Off
Quadrature Phase Error
Requirement
52 to 88MHz / 104 to 176MHz (100Hz steps). Bandwidth of spectrum is
contained within IF frequency range.
50 / 75 Ω programmable
18 dB min
BNC, female
0 to -20 dBm, 0.1 dB steps. Carrier is not interrupted changing between
any levels or removing data connections.
± 0.5 dB nominal at 25°C. Within ± 0.5 dB of room temperature value
over frequency and temperature range.
<-55 dBc/4 kHz over 40 to 250 MHz with modulated carrier
< 1 degrees RMS double-sided, 100 Hz to 1 MHz
TTL low signal – path to shutoff bypasses microprocessor.
< 2°
0.2 dB maximum
Single sideband test with suppressed sideband 35 dB minimum below
unmodulated carrier.
35 dB minimum below an unmodulated carrier.
Normal or Inverted
Requirement
950 to 1950 MHz in 100 Hz steps.
50 Ω
14 dB min
Type N female or optional SMA female
-5 to -25 dBm, 0.1 dB steps. Carrier is not interrupted changing
between any levels or removing data connections.
± 0.5 dB nominal at room temperature. Within ± 0.5 dB of room
temperature value over frequency and temperature range.
Available in Tx only configuration. -20 dB ± 3 dB from main
output.
<-55 dBc/4 kHz over 800 to 2500 MHz with modulated carrier
< 1 degree RMS double-sided, 100 Hz to 1 MHz
TTL low signal – path to shutoff bypasses microprocessor.
< 2°
10–4
Revision 5
MN/CDM700.IOM
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