CiM-550 IP Enabled Satellite Modem

Rev. 2

Front Panel Menus

CD/CIM550.IOM

SELECT\CONFIG\RX\BUF

 

DISPLAY

 

SELECTIONS/DESCRIPTION

 

 

 

 

 

 

 

Edit the size, in bits of the Plesiochronous/Doppler

 

EDIT RX BUFFER SIZE:

 

 

Buffer.

 

+/-4096 BITS (PRESS ENT)

 

Values of +/- 256, 512, 1024, 2048 and 4096 bits

 

 

 

are possible. If the buffer is disabled, a warning

 

 

 

message will be displayed if this screen is entered.

 

 

 

 

 

 

SELECT\CONFIG\RX\RSI

 

DISPLAY

 

SELECTIONS/DESCRIPTION

 

 

 

 

 

 

 

This should normally be in the OFF position. When

 

SELECT RECEIVE SPECTRAL

 

 

in the ON position, the receive spectrum is inverted

 

INVERSION: OFF ON(ENTER)

 

(which is the same as reversing the direction of

 

 

phase rotation in the demodulator). Note that in

 

 

 

BPSK mode, the demodulator will automatically

 

 

 

 

 

synchronize to either the normal time-ordering of

 

 

 

bits FEC codeword pairs, or the inverted ordering

 

 

 

used by certain other manufacturers.

SELECT\CONFIG\RX\Eb/No

 

 

DISPLAY

 

SELECTIONS/DESCRIPTION

 

 

 

 

 

 

 

 

 

The range of values is from 2.0 to 16.0 dB. The user

 

EDIT Eb/No ALARM POINT:

 

 

may select a value here, and if the Eb/No falls

 

2.0 dB

(PRESS ENTER)

 

below this value, a receive traffic fault will be

 

 

generated.

 

 

 

 

 

 

 

 

 

 

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