Keysight V3500A, Руководство пользователя

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18 V3500A User’s Guide
2 Knowing your Instrument
Zeroing the power meter
Zeroing the power meter improves the measurement
accuracy of the V3500A significantly, especially at low power
levels. After the power meter is turned on, you should
always perform zeroing prior to making any measurements.
The V3500A should be zeroed when it warms up, and
periodically when the ambient temperature changes.
1 Prior to zeroing the V3500A, make sure all the RF power
is removed from the V3500A RF input port. This can be
done by disconnecting the RF input, or by disabling the
output of any signal sources connected to V3500A.
2 Once all RF power is removed from the V3500A RF input
port, press
ZERO . The V3500A will display the message
“Zeroing...” during the zeroing process. When the display
returns to normal mode, zeroing is complete and
measurements can be made.
Setting the input frequency
The V3500A has an internal calibration table that corrects
for frequency response variations of its circuitry. For best
accuracy, set the input signal frequency correctly.
1 Press FREQUENCY to set the input frequency. The left
arrow decreases the frequency, and the right arrow
increases the frequency value. The present frequency
setting is displayed on the second line of the display
when the display is in normal mode.
2 Holding either the left or right keypad down will cause
the frequency to decrease or increase rapidly, allowing the
user to quickly set the frequency to the desired value.
N O T E
The instrument returns to the default frequency value setting of 500 MHz
after the instrument is turned off.