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QMultiFlex-400™ Installation and Operating Handbook
6.2.4.17 BUC Carrier
This allows the BUC carrier to be switched on/off. BUC carrier control requires an FSK
control channel to exist between the modem and the BUC.
6.2.4.18 Rx Frequency Band
The modem supports independent selection of IF and L-band operation in transmit and
receive. This menu option controls the receive frequency band.
IF
L-band
6.2.4.19 Rx Spectral Inversion
Spectral inversion is an On/Off control that controls whether the carrier I and Q components
are swapped or not, allowing the modem to compensate for any other equipment in the
transmit or receive chain that has introduced a spectral inversion (Typically an inverting C-
Band LNB).
6.2.4.20 Demod Enable/Disable & Demod Link Identifier
Each demodulator is controlled by an individual checkbox that enables or disables the
associated demodulator, as desired. Each demodulator can optionally be associated with a
link identifier that represents a meaningful name (alpha-numeric text string) for the associated
inbound carrier or remote site.
In order not to interfere with other active demodulators, a
demodulator needs to be disabled before its configuration can be
changed.
This selects the 70MHz and 140MHz IF bands, allowing operation
from 50MHz to 90MHz and 100MHz to 180MHz.
This selects L-band, allowing operation from 950MHz to
2450MHz.
Table 6-15 Rx Frequency Band
6-17
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