User's Manual

Equipment Calibration
68P64115A18–1
Mar 2003
1X SC 4812T Lite BTS Optimization/ATP Software Release R2.16.1.x
DRAFT
F-26
Calibrating HP 437 Power Meter
Precise transmit output power calibration measurements are made using
a bolometer–type broadband power meter with a sensitive power sensor.
Follow the steps outlined in Table F-18 to enter information unique to
the power sensor before calibrating the test setup. Refer to Figure F-19
as required.
NOTE
This procedure must be done before the automated calibration to
enter power sensor specific calibration values.
Figure F-19: Power Meter Detail
CONNECT POWER
SENSOR WITH POWER
METER TURNED OFF
CONNECT POWER SENSOR
TO POWER REFERENCE
WHEN CALIBRATING UNIT.
POWER REFERENCE IS
ENABLED USING THE SHIFT ’
KEYS
SHIFT (BLUE) PUSHBUTTON –
ACCESSES FUNCTION AND
DATA ENTRY KEYS IDENTIFIED
WITH LIGHT BLUE TEXT ON
THE FRONT PANEL ABOVE
THE BUTTONS
FW00308
Table F-18: HP 437 Power Meter Calibration Procedure
Step Action
1
! CAUTION
Do not connect/disconnect the power meter sensor cable with AC power applied to the meter.
Disconnection could result in destruction of the sensing element or mis–calibration.
Make sure the power meter AC LINE pushbutton is OFF.
2 Connect the power sensor cable to the SENSOR input.
3 Set the AC LINE pushbutton to ON.
NOTE
The calibration should be performed only after the power meter and sensor have been allowed to
warm–up and stabilize for a minimum of 60 minutes.
4 Perform the following to set or verify the correct power sensor model:
4a – Press [SHIFT] then [a] to select SENSOR.
4b – Identify the power sensor model number from the sensor label.
4c – Use the [y] or [b] button to select the appropriate model; then press [ENTER].
5 Refer to the illustration for step 8, and perform the following to ensure the power reference output is
OFF:
5a – Observe the instrument display and determine if the triangular indicator over PWR REF is
displayed.
5b – If the triangular indicator is displayed, press [SHIFT] then [’] to turn it off.
. . . continued on next page
F