Mocomtech CDM-QX - Manual (Page 37)

CDM-Qx/QxL Multi-Channel Satellite Modem with DoubleTalk™ Carrier-in-Carrier® Revision 7
Introduction MN/CDMQx.IOM
1–13
On the CDM-QxL, when activated on the Tx-IF port, this link can communicate with an FSK-
capable Block Upconverter (BUC) or, conversely, when activated on the Rx-IF port, a Low-Noise
Block Downconverter (LNB).
In this manner, the user may monitor, configure, and control the Transceiver, BUC or LNB via the
modem’s front panel display and keypad, or by using the modem’s remote control interface.
The EDMAC overhead channel may also be used to convey M&C data to a RF Transceiver at the
distant end of a satellite link if it is connected to a CDM-Qx, or to a BUC or LNB at the distant end
of a satellite link if it is connected to a CDM-QxL.
For the CDM-QxL, this FSK interface with the BUC includes a BUC output power leveling mode,
whereby the modem M&C monitors the detected BUC output power level reported on the FSK link
and automatically adjusts the modem Tx output power to maintain a constant BUC Tx output level.
1.4 New in this Release
Revision 7 of this manual denotes a complete rewrite of the CDM-Qx Satellite Modem Installation
and Operation Manual (CEFD P/N MN/CDMQX.IOM). It is intended replace all previous versions
of this document in their entirety. All content has been reorganized to conform to current Comtech
EF Data Technical Publications Standards and Practices.
Note that firmware for the CDM-Qx/QxL is chassis-specific, as explained in Sect. 1.3.11. Users
are strongly urged to upgrade the CDM-Qx/QxL to the appropriate current firmware release – for
further information, refer to Chapter 4. FLASH UPGRADING.
1.4.1 CDM-Qx/QxL Firmware Release Notes
FW-0000107 Ver. 2.1.5 Release (5/20/09) / FW/11245 Ver. 1.6.6 Release (5/20/09)
New Features:
• None.
Feature Enhancements:
• Upgrade power ratio monitor reporting functionality.