(Config: Rx) Symrate; (Config: Rx) Mode; (Config: Rx) Freq - Comtech EF Data CDM-710 Installation And Operation Manual

CDM-710 Broadcast Satellite Modem
Front Panel Operation

(CONFIG: Rx) SymRate

Data: 017.185842 Mbps
Sym: 017.379483 Msps
If the Rx Path is not locked, the message should as shown in the above example. To change the
Symbol Rate, use the
to change the value of that digit. Press
In DVB-S and DVB-DSNG Mode, the Data Rate digits also change as the Symbol Rate values
are edited. The value of the Data Rate depends upon the code rate, modulation type. When
programming a new symbol rate (or indirectly a data rate) the value is not accepted unless it is
within a valid range.
See the tables under the (CONFIG:) Tx
rates.
In DVB-S2 Mode,
Rx path is not synchronized. After synchronization, the correct data rate appears in the display
and the demodulator has automatically resolved the modulation type, code rate, pilots ON/OFF,
FEC frame length, spectral inversion, etc. from the DVB-S2 carrier.

(CONFIG: Rx) Mode

Receive Mode (DVB):
S2-G/S2-TS S DNG
The RX Mode is a key parameter for setting all modem parameters, and it is generally easier if it
is set first. The Mode determines which demodulation, code rates, FEC type and symbol rate
range are available and also if Pilots or Gold Code settings are available. Changing the Mode will
change one or more of these. The available range also determines on the FAST options selected at
time of purchase.
Select S2-G/S2-TS, S, or DSNG using the
modes, check the modulation, code, and data rate selections.

(CONFIG: Rx) Freq

RX Freq: 0140.0000 MHz
Edit the RX IF Frequency. Use the
arrow keys to change the value of that digit, then press
CDM-710 (70/140 MHz)
CDM-710L (L-Band)
IMPORTANT
arrow keys to select the digit to be edited, then use the
ENTER
Demod Unlocked
( ▲ ▼ E)
The ranges of frequencies are from 52 to 88 MHz and from 104 to 176
MHz with a resolution of 100 Hz.
The range is 950 to 2000 MHz with 100 Hz resolution.
The bandwidth of the modulated carrier MUST stay within the IF frequency
range, or the frequency is not accepted.
(E)
when done.
SymRate menu for the valid range of symbol / data
in place of the 'Data:' value (on the top line) while the
arrow keys, then press
arrow keys to select the digit to be edited. Use the
Note the following:
ENTER.
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Revision 11
MN/CDM710.IOM
arrow keys
. After changing
ENTER