Mocomtech CDM-QX Config„Rx„Inv RX Inversion Functions, Config„Rx„Misc Rx Miscellaneous

CDM-Qx Satellite Modem	Revision 5
Front Panel Operation	MN/CDMQx.IOM

being slightly different from the local clock (a so-called plesiochronous offset), and to the motion of the satellite (a Doppler offset). The input to the buffer will be the signal from the satellite, with any clock offsets and jitter. The output from the buffer will be derived from the local TRANSMIT clock. In this way, the receive data will be perfectly synchronous with this local clock. The modem operates with independent receive and transmit data rates. Even in this configuration, where RX data rate <> TX data rate, the output clock for the buffer will be phase locked to the transmit clock.

While it is only possible to select the size in bits, the corresponding total buffer size is displayed in ms (which will vary in inverse proportion to the data rate).

(Config„Rx„Inv) – RX INVERSION FUNCTIONS

Rx Inversion functions:

Spectrum Data Clock (◄ ►, ENT)

Select Spectrum, Data, or Clock using the ◄ ► arrow keys, then press ENT.

If Spectrum is selected, the following sub-menu will be displayed:

Select Normal or Inverted, using the ◄ ► arrow keys, then press ENT.

If Data is selected, the following sub-menu will be displayed:

Rx	Data Sense:
	Spectral Inversion:
Normal Inverted		(◄ ►,ENT)

Select Normal or Inverted, using the ◄ ► arrow keys, then press ENT.

If Clock is selected, the following sub-menu will be displayed:

Rx Clock Inversion:	(◄ ►, ENT)
Normal Inverted

Select Normal or Inverted, using the ◄ ► arrow keys, then press ENT.

(Config„Rx„Misc) – Rx Miscellaneous

Rx Misc: EbNo Rxα

(◄ ►, ENT)

Select EbNo or Rxα using the WXarrow keys, then press ENT.

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