Comtech EF Data CDM-Qx, Инструкция по установке и эксплуатации

Страница: 52 / 224

CDM-Qx Satellite Modem Revision 6
Front Panel Operation MN/CDMQx.IOM
from the back of the chassis. The left hand TX on the display corresponds with the top
left slot in the chassis when viewed from the back. An empty slot is left blank.
The left RX on the example display is highlighted. This is the selected slot. All monitor
functions (including the front panel LEDs) reflect the status of this slot. All parameters
selected from the menu tree while this slot is selected apply either to this slot or to
common functions. The menus for common functions appear redundantly in all four slots.
To change slots, move the cursor to the desired slot, and press
ENTER
.
The designator for a plug-in device with an unmasked failure has an F suffix:
In this example, the upper right transmitter has a fault. (View the fault using Monitor,
Alarms, etc).
TX TXF | (right hand display area)
<RX> RX | (right hand display area)
5.3.1 Modems
A modulator in a top slot can be grouped with a demodulator in the slot directly below it
to form a modem:
The example indicates a configuration in the right hand slots (when viewed from the back
of the chassis) grouped together to form a modem. Selecting the slots is the same as a
basic configuration except that the blank area below the MD are not be selectable. When
the modem is selected, the menus display modulator and demodulator functions, and the
software selects the appropriate plug-in for the command.
Two modems can share a modem:
The selected modem is the modulator demodulator pair on the right side of the chassis
(when viewed from the back). When modem is in CnC mode, the brackets (<>) turn into
bold characters.
TX <MD> | (right hand display area)
RX | (right hand display area)
MD <MD> | (right hand display area)
| (right hand display area)
5.3.2 Redundancy
Modules, (modulators and demodulators) can be upgraded to operate as redundant units.
If enabled the module can back up a like kind module located anywhere in the chassis. If
a modulator and demodulator have redundancy enabled and they are grouped as a
modem, the pair can back up a modem. Note: The interface selected for the modules does
not have to match the interface type used on the prime modules.
5–4