Comtech EF Data CDM-625A, Installation And Operation Manual

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CDM-625A Advanced Satellite Modem MN-CDM625A
Front Panel Operation Revision 4
6–20
6.2.1.3.6 CONFIG: Tx

Data
Tx Data Rate Tx Sub-Mux
(

)
Use the ◄ ► arrow keys to select Tx Data Rate or Tx Sub-Mux . Press ENTER .
When Tx Sub-Mux is ON , this menu provides read-only IP Info Rate information on the bottom
line:
Tx Data Rate Tx Sub-Mux
(IP Info Rate: 01200.340 kbps) (

)
CONFIG: Tx

Tx Data

Tx Data Rate
Tx Data Rate = 01544.000 kbps
Data Invert=Off Clock Invert=Off (

)
Use the top line to edit the Tx Data Rate. Use the bottom line to configure the Data Inversion or
the Clock Inversion features, which provide compatibility with certain older equipment.
On the top line – Edit the Tx Data Rate by using the ◄ ► arrow keys to select the digit to edit,
and then using the
▲▼
arrow keys to change that digit. Press ENTER .
The range for the Tx Data Rate is from 18 kbps to 25 Mbps. The actual minimum and maximum
data rates depend on Framing mode, Interface type, Modulation type and FEC Code Rate. When
you change any of the higher-priority parameters – causing the data rate to become invalid –
the Data Rate adjusts automatically. The installed FAST option(s) also dictate the upper range of
data rate.
When configuring for D&I or IDR framing or for G.703 interface type, the
▲▼
arrow keys scroll
through only the available data rates. When you edit the data rate to 1920 kbps while in D&I
framing, a message informs you that E1 Fixed Channel Mode is implemented.
When using G.703, three auxiliary rates are available: 512, 1024 and 2048 kbps. This availability
is indicated when the word AUX appears to the right of the decimal place (e.g.,
00512. AUX
kbps
).
In Chapter 3. REAR PANEL CONNECTOR PINOUTS – See Sect. 3.3.2.5 G.703 IDI (Insert
Data In), DDO (Drop Data Out)
Note that these data rates are read-only in QDI (Quad D&I) mode! The data rate is the sum of
the tributary rates for all ports.
On the bottom line – You may set either Data Invert or Clock Invert operation by using the
▲▼
arrow keys to select On or Off . Press ENTER .