Comtech EF Data CDM-Qx, Installation And Operation Manual

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CDM-Qx Satellite Modem Revision 6
Front Panel Operation MN/CDMQx.IOM
Note that this value is used for displaying the RF frequency of the modem/BUC
combination. If a value of 00000 is entered here (the default) then no RF frequency will
be displayed on the
Config
%
Tx
%
Freq
menu.
(Config
%
ODU
%
BUC
%
Mix) – BUC MIX
Selecting
Mix
displays the following submenu:
BUC Frequency Mix:
High-Side Low-Side (
◄ ► ENT)
Select
High-Side
or
Low-Side
using the
◄ ►
arrow keys, then press
ENTER
.
(Config
%
ODU
%
LNB) LNB
Selecting
LNB
displays the following submenu:
LNB: DC-Voltage 10MHz Alarm
LO Mix
( ◄ ► , ENT)
Select
Voltage, Power-On/Off, 10MHz, Alarm, LO
or
Mix
using the
◄ ►
arrow keys,
then press
ENTER
.
Voltage Selects 13 or 18 Volts as the LNB power supply output voltage.
10MHz
This menu permits the user to turn the 10MHz frequency reference for the BUC
ON or OFF .
Alarm
This menu permits the user to define the upper and lower limits for a current
‘window’. If the measured LNB current falls outside this window, an alarm is
generated.
LO
This menu permits the user to define the LO frequency used in the LNB. This is
then used in the display of RF frequency in the
Config
%
Rx
%
Freq menu.
Mix
This menu permits the user to define the sense of the frequency translation –
either high-side mix or low-side mix.
(Config
%
ODU
%
LNB
%
Voltage) - LNB VOLTAGE
Selecting
Voltage
displays the following submenu:
LNB DC Supply Voltage:
Power Off (
▲▼ , ENT)
The choices are 13 or 18 Volts. Edit the value of the LNB supply voltage using the
#$
arrow keys, then press
ENTER
.
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