3/6/08 888-2463-001 5-17
WARNING: Disconnect primary power prior to servicing.
Section 5 Maintenance and Alignments
Diamond Series™
STEP 6 Move the cable from the power sensor to the detector input to be
calibrated.
STEP 7 On the GUI display, go to the screen shown in Figure 5-5. It is under
Main Menu, Maintenance, Calibrate Meter, Reject Load Calibrations.
With 50mW applied to the detector input, the GUI reading for that
detector should be 4V (+/- 0.3V) and 100% as shown Figure 5-5 for
detector #1. If both readings are OK, move the cable to the next detector.
If the detector voltage is OK but does not read 100%, go to STEP 12. If
the detector is not OK, continue with the next step.
STEP 8 Turn the potentiometer on the detector fully clockwise (CW) for the
maximum voltage out of the op-amp (the rail is approximately 9 VDC).
STEP 9 Select the gain dipswitch settings that give a voltage reading less than
the rail voltage, but greater than 4Vdc(6Vdc is ideal). Make sure both
inputs to the op-amp are switched the same. The 3 gain settings are:
Low - dipswitches 1 & 4 ON
Mid - dipswitches 2 & 5 ON
High - dipswitches 3 & 6 ON
STEP 10 Measure the voltage at the test point in the RF Detector assembly for the
stage you are calibrating. The detectors are sectional with the
adjustments located directly below the input. All 8 test points are located
on the one end but correspond directly to the input number, J1 = TP1, J2
= TP2 etc... See the RF Detector schematic in Section 500 of the
schematic package.
STEP 11 Adjust the trim pot for 4 VDC at the test point.
STEP 12 Once the detector voltage reads 4V, it should also read 100%
on the GUI. If not select the detector button below the voltage
reading and use the increase/decrease and Fast/Slow buttons
at the bottom of the screen to set the reading to 100%.
STEP 13 Press “Save Data”. You must press this button after each detector is set.
If you select another detector before saving it will lose the setting and
default back to what it was before adjustment.
STEP 14 Repeat STEP 6 through STEP 13 for each detector input.
STEP 15 When you are finished, place JP1 back to the normal position, pins 1-2
and secure the detector.
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