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Chapter 6 221
Analog Measurements - Screens and Control Fields
Control Fields for Analog Measurements
TX Pwr Zero
The transmitter power zero function establishes a 0.0000 W reference
for measuring RF power at the RF IN/OUT port.
Operating Considerations
When power is applied to the RF IN/OUT connector, the temperature of
the internal circuitry increases. This can cause changes in the TX
power measurement when low power levels are measured immediately
following high power measurements.
When alternately making high and low power measurements, always
zero the power meter immediately before making the low power
measurements; this provides the best measurement accuracy.
If the Auto Zero field is set to Auto, the TX power measurement is
periodically zeroed (automatically). Manual calibration is only needed if
Auto Zero is set to Manual, or if you are measuring highly variable
signal levels (as mentioned above).
Screens on which this field is displayed
RF ANALYZER
Vert/div
Vertical sensitivity sets the vertical amplitude per division.
Operating Considerations
The value for this field is selected from a list of choices.
Depending on the AF analyzer’s AF Anl In setting, the units for this
field may be in Volts, kHz, or Percent (AM). For example; if the AF Anl
In field is set to FM Demod, the amplitude is displayed in kHz/div.
Screens on which this field is displayed
SCOPE: main controls menu