ComSonics CyberTek QUALIFIER, User Manual

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Qualifier Meter
1-8
Making Measurements
Each user request for a measurement causes the Qualifier meter to tune to the channel
assigned to the function key pressed: the Qualifier meter displays the picture carrier, and
another press of the same key toggles to the sound carrier, and subsequent keypresses toggle
back and forth between the two. First-time tuning may experience a slightly longer delay
than subsequent measurements as the Qualifier meter learns and stores the exact location of
the carriers within the channel. (This will happen once for each function key selection; it can
take place here or during the SETUP mode. See section
Quick-Tune Channels Define .)
Several samples of the tuned channel peak amplitude are measured, averaged, augmented
with temperature and characteristic data particular to each instrument, and displayed. The
value is displayed as the Qualifier meter changes to a low power mode. Automatic power
down occurs if a key is not pressed for 1 minute. Repowering always furnishes the last
measurement made before power-down. The value will be blinking to serve as a reminder
that a previously measured value is being displayed.
is also active during normal measurement
operation; automatic power-down occurs if keys remain idle
for 1 minute.
During measurement mode, if the signal is less than
-30 dBmV , the display substitutes LO for the signal level
readout. If the signal level is greater than 40 dBmV , the
display substitutes HI for the signal level readout.
As an additional aid to verification of tuned signals, the Qualifier meter produces a low
impedance sound signal, provided through the earphone jack in the Qualifier meter’s case.
This sound signal is extracted by the Qualifier meter from sound, picture, digital, or other
carriers. When a channel is tuned by pressing an arrow key or one of the function keys,
sound can be heard through an earphone connected to the earphone jack. The sound is
turned on 15 seconds for video and 20 seconds for audio. (This is to preserve battery power.)
Signal level measurements are made by (a) powering-on the Qualifier meter, and
(b) selecting the channel to tune: first the picture carrier, then the sound carrier.