Operator`s manual

AVM-510A Option T (For Transmission Monitoring)
11-4
Measure Signal ID
The correct signal must be selected so that the zero carrier and the measured signal will be detected
properly.
1. Press the Mesmnt button.
2. Select SELECT SET and then press the Entr button.
3. Select TRANSMITTER and then press the Entr button.
4. Select SIGNAL ID and then turn the knob to AUTO SIGNAL ID. If the signal is known, it can be
set to FCC COMPOSITE, NTC7 COMPOSITE, CCIR 17/330 or NATIONAL ITS.
NOTE:
Refer to “Setting Automeasurement Limits” in chapter 9 for information on
setting measurement limits.
NOTE:
The transmitter measurement set is never selected when AUTOMEASURE/ AUTO
MEAS SET is active. It must be manually selected.
Differential Gain and Phase
A 1H line sweep display of differential gain or phase is available for the option T (see Figures
11-3 and 11-4). You select the differential gain function by accessing factory default memory
7. You can also select it by pressing the VECTOR button a third time when Input A or B is in
the Composite format.
To set up the differential gain display:
1. Set the BURST VECTOR to 180° while in Vector mode.
2. Press the VECTOR button twice.
3. Vertically position the baseline to zero IRE (% in PAL).
4. Set the VARIABLE GAIN at the top position to 100 IRE (%).
NOTE:
The differential gain reading is the difference in % between the centers of the
peak and the valley of the waveform.
You select the differential phase function by pressing the VECTOR button a fourth time. You
can also select it by accessing factory default memory 8.
NOTE:
All settings remain calibrated from the differential gain display.