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CDM-710G High-Speed Satellite Modem
Front Panel Operation
(CONFIG:) Rx
Rx Demod: Type Inv Acq α
Eq IQ-TP Pilot Scr (
Select Type, Inv, Acq, α, Eq, IQ-TP, Pilot, or Scr using the
If Rx Demod:
Rx Dem:
16APSK
32APSK
This menu is read-only, as the type of modulation is determined automatically. Prior to
synchronization of the Rx path, the cursor may reside in any position. After synchronization (Rx
Traffic LED is Green), re-access the Rx Demod:
rests under the modulation type.
Note: While 16QAM is displayed in this menu, it is not selectable and not supported in DVB-S2
mode.
If Rx Demod:
Rx Spectrum:RX PARAMETERS
AUTOMATICALLY SELECTED.
This menu is read-only, as the demodulator automatically resolves frequency inversion.
Normal or Inverted is not reported in the demodulation. Press
previous menu.
If Rx Demod:
Demod Acquisition Range:
+/-010 kHz
The value entered here determines the amount of frequency uncertainty the demodulator will search
over in order to find and lock to an incoming carrier.
To edit the demodulator acquisition search range value, use the
to be edited, then use the
The range varies from ±001 kHz to ±100 kHz.
If Rx Demod:
RX (α) Rolloff %: 20
35
The rolloff or α dictates how fast the spectral edges of the carrier are attenuated beyond the 3 dB
bandwidth. With 20% rolloff the edge falls off more quickly than with 25% and 35%. Select the
value using the
The default Rolloff (α) setting is 20%; whenever the mode is changed, (α) reverts to 20% but
can be modified to 25% or 35% using this menu.
Dem (Demod)
E)
Type is selected:
QPSK 8PSK 16QAM
(
E)
Inv is selected:
Acq is selected:
(
▲ ▼ E)
arrow keys to change the value of the digit. Press
α
is selected:
25
(
E)
arrow keys, then press
arrow keys, then press
Type menu to update the display – the cursor
ENTER
.
ENTER
6–18
Revision 1
MN-CDM710G
.
ENTER
or
to return to the
CLEAR
arrow keys to select the digit
when done.
ENTER
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