Comtech EF Data CDM-570 - Manual (Page 112)

CDM-570/570L Satellite Modem with Optional IP Module Revision 12
Front Panel Operation MN/CDM570L.IOM
5–26
The buffer’s input is the signal from the satellite, with any clock offsets and jitter. The buffer’s
output is derived from the local TRANSMIT clock. In this way, the receive data will be perfectly
synchronous with this local clock. The CDM-570/570L can be operated with independent receive
and transmit data rates. Even in this configuration, where Rx data rate < > Tx data rate, the buffer’s
output clock 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).
5.2.2.1.4.9 (CONFIG: Rx) Inv (Inversion Functions)
Rx Inversion functions:
Spectrum Data (◄ ►,ENT)
Use the
◄ ► arrow keys to select Spectrum or Data, and then press ENTER.
(CONFIG: Rx) Rx Inversion functions: Spectrum
Rx Spectrum: Normal
Inverted (◄ ►,ENTER)
Use the ◄ ► the arrow keys to select Normal or Inverted, and then press ENTER.
(CONFIG: Rx) Rx Inversion functions: Data
Rx Data Sense: Normal
Inverted (◄ ►,ENTER)
Use the arrow keys to select Normal or Inverted, and then press ENTER.
5.2.2.1.4.10 (CONFIG: Rx) E
b
/N
0
Eb/No Alarm Point:
02.0 dB (◄ ►,▲ ▼,ENTER)
An alarm point value may be defined where, if the E
b
/N
0
falls below this value, a receive traffic
fault is generated.
To edit the E
b
/N
0
Alarm Point: First, use the ◄ ► arrow keys to select a digit to edit, and then
use the ▲ ▼ arrow keys to edit the value of that digit. The range of values is from 0.1 to 16.0 dB.
Press ENTER when done.