BridgeTech VB20 User Manual page 188

Maximum signal
strength:
Maximum
frequency offset:
The impulse response checking threshold values are only relevant when the probe is
licenced with the Advanced RF Option. Threshold values for each impulse will
become visible in the COFDM - Impulse response view as a highlighted box in the
impulse response graph. If an impulse peak does not fall within its box an alarm will be
raised. Threshold values for a maximum of ten impulses may be defined.
Impulse detection
limit:
Enable: It is possible to enable or disable time location and level
Name: A text string specified by the user to name an impulse.
Time min: The minimum time an impulse should occur after the main
Time max: The maximum time an impulse should occur after the main
Power min: The minimum power of an impulse compared to the main
Power max: The maximum power of an impulse compared to the main
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Threshold level for maximum signal strength.
This is a measure of the stream signal power. It is expressed
according to the level mode selection made in the Setup -
ETR view:
dBm: in decibels relative to a reference value of 1mW
dBuV: in decibels relative to a reference value of 1µ V
dBmV: in decibels relative to a reference value of 1mV
Threshold level for maximum centre frequency offset
Impulse response checking:
The impulse detection limit in dB. Signal peaks with lower
level than the detection limit will be regarded as noise and
not considered an impulse.
check of an impulse. Mark the 'Enable' check-box for the
probe to raise alarm if an impulse peak is not found within
the graph box defined by the specified time and power
limits.
Typically this will be the name of a transmitter.
impulse
impulse
impulse (in dB)
impulse (in dB)
PROBE USERS' MANUAL VERSION 5.0
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189