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CDM-600L Satellite Modem
Front Panel Operation
This menu permits a user to decide if the 64 kbps channel in the IDR overhead (normally
reserved for the two 32 kbps ADPCM audio channels) should carry user data instead. The
rear panel Overhead connector provides the appropriate RS-422 interface for this option.
Use the [←] [→] arrow keys to select the parameter to edit. Select the appropriate IDR-
ESC Type, using the [↑] [↓] arrow keys, then press ENTER.
CONFIG: MISC: ADPCM AUDIO VOLUME
TX-1 VOLUME= +0 dB
RX-1 VOLUME= +2 dB
This menu permits the gain (or volume) of the audio ESC circuits, for both Receive and
Transmit, to be varied. Note that the step size is 2dB.
Select the appropriate volume, using the [←] [→] arrow keys, and edit the volume using
the [↑] [↓] arrow keys, and press ENTER.
CONFIG: MISC: HIGH-RATE-ESC
HIGH-RATE-ESC = OFF (ON,OFF)
BAUDRATE =
The ESC type defined here depends on the framing type selected under CONFIG, MODE.
The two options are either High-Rate IBS ESC or ESC++.
The High Rate IBS ESC (Engineering Service Channel) is available as a FAST option in
conjunction with IBS framing. If enabled, the lower of the Tx or Rx primary data rate
limits that maximum ESC baud rate, according to the table below. Both Tx and Rx framing
must be IBS to enable this feature.
Data rate
64 kbps
> 127.999 kbps
> 255.999 kbps
> 383.999 kbps
> 511.999 kbps
> 767.999 kbps
> 1023.999 kbps
TX-2 VOLUME= -2 dB
RX-2 VOLUME= -4 dB
9600
PARITY:DATA:STOP = N81
Max ESC baud rate
2400
4800
9600
14400 (version 1.3.0 onwards)
19200
28800 (version 1.3.0 onwards)
38400
6–23
Revision 2
MN/CDM600L.IOM
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