Comtech EF Data SNM-1010L - Manual (Page 247)

SNM-1010L Data/Control Modem Revision 0
Specifications
MN/SNM1010L.OM
B.3.11 Output Noise Floor
The Modulator output Noise Floor is -130dBc/Hz (20 MHz from carrier)
B.3.12 Transmit IF Test Modes
The following TX-IF test modes are available to the operator. Spurious emissions in the
following test modes will be
≤ -30 dBc.
• CW: Outputs a single carrier at the defined frequency
• Offset: Dual sideband signal with lower sideband and carrier suppressed
≤ -35 dBc (< -30 dBc for 8PSK only)
• Dual sideband: Suppressed carrier ≤ -35 dBc (< -30 dBc for 8PSK only)
B.3.13 Spectrum Rotation
The operator selects Normal or Inverted spectrum of the Modulator Output.
B.3.14 Modulator Output Return Loss
The Modulator output return loss is > 20 dB into a 75 Ω load.
B.3.15 I / Q Imbalance
• The modulator will have less than 2° RMS phase error
• The modulator will have less than 0.25 dB amplitude imbalance
B.3.16 External Modem Supply Voltage
Standard configuration is without a power supply for the external modem.
During power up of the modem, the modem supply voltage initially powers up in the
OFF condition. During modem initialization, the modem supply voltage is turned ON in
a manner that safely limits the current going to the modem. The modem is protected for
all short, open and loaded conditions.
The modem is programmable to turn the modem supply voltage On/Off. The modem is
protected for all short open and loaded conditions.
B.3.17 Reference Signal
B–5