Agilent Technologies 8590 Series Service Manual page 437

Analyzer Options and Block Diagrams
Option 190 DVB-C Service Menus
Menu 3 of 3
(when set to OFF) allows you to disable the
COUPLING ON OFF
automatic selection of channel bandwidth when a new channel is
entered. This may be used if you want to ignore the FTZ `D' channel
layout while using `D' channels.
(when set to OFF) allows you to disable the automatic
RETUNE ON OFF
re-setting of the 71.1 MHz oscillator that is done when a demod-based
measurement signal acquisition fails. This can be set to off to
investigate signal acquisition for a fixed 71.1 MHz tuning state (lower,
centered or upper).
allows entry of values from 0 to 50 dB (the default is
ACQ MER LIMIT
20 dB). This value is used during a demod-based measurement
signal-acquisition routine. If the measured value of MER is less than
this limit and the key in the menu is ON,
MER LMT ON OFF Demod Setup
the acquisition routine will abort with a MER TOO LOW message.
allows entry of values from 0 to 50 dB (the default is
MEAS MER LIMIT
20 dB). This value is used during a demod-based measurement. If the
measured value of MER is less than this limit and the MER LMT ON
OFF key in the Demod Setup menu is ON, the measurement will abort
with a MER TOO LOW message.
Setting in the Demod Setup menu to OFF will ignore
NOTE MER LMT ON OFF
both "ACQ" and "MEAS" MER limits. This is essentially a shortcut to
setting both ACQ and MEAS MER limits to 0 dB to allow acquisition
and measurement of very noisy signals.
is used to disable the automatic channel bandwidth
IGNOR BW ON OFF
verification that is done at the start of single signal demod based
measurements. If this key is set to ON, the signal's (approximate)
measured occupied bandwidth is not compared against the setting of
the key.
CHAN BW SELECT
Chapter 10 437