Product specifications

CDM-710 Broadcast Satellite Modem Revision 11
Front Panel Operation MN/CDM710.IOM
5–20
(CONFIG: Rx) Dem Æ Inv
Rx Spectrum:
Automatically Detected.
This screen is ‘status only’ as the demodulator automatically resolves frequency inversion.
Normal or Inverted is not reported in the demodulation. Press
ENTER or CLEAR to return
to the previous menu.
(CONFIG: Rx) Dem Æ Acq
Demod Acquisition Range:
+/-010 kHz (▲ ▼ E)
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
W X arrow keys to select the
digit to be edited, then use the
ST arrow keys to change the value of that digit. The range
varies from ±001 kHz to ±100 kHz. Press
ENTER when done.
(CONFIG: Rx) Dem Æ α
RX (α) Rolloff %: 20 25
35 (E)
The Rolloff (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
W X arrow keys, then press ENTER. 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.
(CONFIG: Rx) Dem Æ Eq
Rx Adaptive Equalizer:
Off On (E)
The adaptive equalizer helps correct for linear distortion in the rest of the link. Linear distortion
includes amplitude and phase that would occur due to imperfect filtering effects, but it does not
include distortion due to non linear amplifiers.
Select operation as Off or On using the
W X arrow keys, then press ENTER.