Service
Chapter 346
FET Balance Procedure
Step 1. Set the Power Meter as follows:
Step 2. Connect the HIGH GAIN OUTPUT on the modified Power Meter to
CHANNEL 1 on the Oscilloscope and set it up as follows:
Step 3. Connect the CHOP OUTPUT on the modified Power Meter to CHANNEL 2 on
the Oscilloscope and set it up as follows:
CAL FACTOR 100%
POWER REF ON
POSITION 0 Volts (centered)
COUPLING AC
PROBE 1:1
DISPLAY AVERAGE
AVERAGE 8
VECTORS ON
GRID ON
MAIN/DELAYED MAIN
TIME REF CENTER
TIME/DIV 500us
VOLTS/DIV 50 mV
MODE AUTO LEVEL
TRIGGER SOURCE CHANNEL 2
VOLTS/DIV 5V
POSITION -5V
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