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Interface Configuration and Interpretation
MTM400 MPEG Transport Stream Monitor User Manual 3-127
IF Spectrum This can be set to Normal or Inverse, to allow for frequency
conversions in the signal chain. Conversions that use difference
frequencies invert the spectrum; additive conversions do not.
Channel State Available options are auto, static, dynamic and fast dynamic.
Using these options you can match the receiver equalizer to the
expected channel conditions. The recommended default setting
is auto.
NTSC Rejection Filter
This setting gives you control over the integrated cochannel
NTSC reject filter. Options are on, off and auto. The
recommended default setting is auto.
Carrier Lock
This setting allows you to control the carrier lock range. The
Normal setting allows lock over a ±150 kHz range; Wide
extends the range to ±500 kHz. The recommended default
setting is Normal.
Tuner Phase Noise
Normal and High. This control modifies the carrier loop
bandwidth to allow the acquisition of nosiy carriers. Normal
mode is recommended for general use.
Signal Detection NTSC (National Television Standards Committee) and VSB
(Vestigial Side Band).
Front End Lock
If full lock is acquired onto the channel and it is receiving the
signal correctly, the Front End Lock (FEL) indicator will light
up green. When a signal is present but no lock is achieved, the
indicator is red. When no signal is found, the indicator is gray.
BER BER is displayed, measured before the Reed Solomon forward
error correction block.