User's Manual Part 4

Equipment Calibration – continued
B-30 1X SC480 BTS Hardware Installation, Optimization/ATP, and FRU MAY 2004
PRELIMINARY
Table B-21: HP 437 Power Meter Calibration Procedure
Step Action
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.
6 Press [ZERO].
– Display will show “Zeroing ******.”
– Wait for process to complete.
7 Connect the power sensor to the POWER REF output.
8 Turn on the PWR REF by performing the following:
8a – Press [SHIFT] then [’].
8b – Verify that the triangular indicator (below) appears in the display above PWR REF.
9 Perform the following to set the REF CF%:
9a – Press ([SHIFT] then [ZERO]) for CAL.
9b – Enter the sensor’s REF CF% from the sensor’s decal using the arrow keys and press [ENTER].
(The power meter will display ”CAL *****” for a few seconds.)
NOTE
If the REF CAL FACTOR (REF CF) is not shown on the power sensor, assume it to be 100%.
10 Perform the following to set the CAL FAC %:
10a – Press [SHIFT] then [FREQ] for CAL FAC.
10b – On the sensor’s decal, locate an approximate calibration percentage factor (CF%) at 2 GHz.
10c – Enter the sensor’s calibration % (CF%) using the arrow keys and press [ENTER].
–– When complete, the power meter will typically display 0.05 dBm. (Any reading between
0.00 and 0.10 is normal.)
11 To turn off the PWR REF, perform the following:
11a – Press [SHIFT] then [’].
11b – Disconnect the power sensor from the POWER REF output.
B