Comtech EF Data OM20 - Manual (Page 92)

OM20 Universal Outdoor Modem Web Browser/Remote Protocol
MN-OM20– Revision 5 6–18
Data Rate
Inner Code Rate
Satellite Framing
Scrambler
Drop and Insert
Outer Code Rate (Reed-Solomon)
Modulation
Network Spec
Frequency (MHz):
Allows the user to enter the Modulator IF Output Frequency of
the modem in 1 Hz increments.
Uplink Frequency (MHz): Displays the output frequency of the BUC also referred to as
Satellite uplink frequency. The Radyne technician must enter
the BUC LO and OSC SIDE BAND before using this menu.
The UPLINK FREQUENCY is a calculated measurement of
both the BUC LO and OSC SIDE BAND. Once the menus are
entered correctly, the user can control the uplink Frequency from
this menu.
Power (dBm):
{-20 to -45 dBm}
Allows the user to enter the Transmitter Power Level.
Carrier Control:
{ON, OFF, AUTO, VSAT, RTS}
Allows the user to select the carrier type. Refer to Appendix C
for further information.
Spectrum: {Normal, Inverted}
Allows the user to invert the direction of rotation for PSK
Modulation. Normal meets IESS Specification. Spectral
inversion may be required if the BUC LO is higher in frequency
than the BUC output frequency. This creates a spectral inversion
and the IF spectrum must be again inverted to compensate.
Modulation:
{QPSK, BPSK, OQPSK, 8PSK, 16QAM}
Allows the user to select the modulation type.
Spectral Mask:
{Intelsat 0.35, DVB SAT 0.35, DVB SAT 0.25}
Allows the user to set the spectral shape of Tx Data Filter
Compensation:
{0.0 – 1.0}
Allows you to offset output power by up to 1 dbm. This is
intended as a correction for user cabinet connectors.