HP Cell Phone Accessories E6380-90019 Manual Do Utilizador
Chapter 5
157
Analog Measurements - Screens and Control Fields
TX Pwr Zero
TX Pwr Zero
TX Pwr Zero
The transmitter power zero function establishes a 0.0000 W reference
for measuring RF power at the RF IN/OUT port.
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.
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.
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
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