Calibration Adjustment
Calibration Adjustments 4
4-7
22. Reconfigure the Spectrum Analyzer/Measuring Receiver to make AM depth
measurements.
23. Using the blue arrow keys and rotary knob, edit the UUT Actual output until
the Spectrum Analyzer indicates the Target value stated. Push Accept
Target.
24. Push Next Target.
25. Repeat steps 23 through 24 until all Base adjustments are completed.
26. Push Back. To proceed with head adjustment, push Adjust Head. Otherwise,
push Exit.
27. Remove all connections to the base unit.
Leveling Head Adjustment – 50
Ω
Equipment required:
• AC Measurement Standard
• Precision feedthrough termination, 50 Ω
• 50 Ω Type-N female-to-BNC male adapter
• Power Meter
• Power Sensor, Thermal, 50 Ω
• Power Sensor, Diode, 50 Ω
• Precision Adapter, Type-N female-to-female, 50 Ω
• Spectrum Analyzer/Measuring Receiver
Note
Base Adjustment must be performed before attempting Head
adjustment. Once Base adjustment is complete, Head adjustment
can take place in any order (50
Ω
or 75
Ω
first).
Note
If the Reference Frequency or Base Adjustment was just completed,
omit steps 2 and 3, below.
1. Ensure a 50 Ω Leveling Head is connected to the UUT base.
2. On the UUT, push , followed by the softkeys Support
Functions>Calibration>Adjust Instrument.
3. Using the keypad, enter the password, and push .
4. Push the softkey Adjust Head.
5. Connect the UUT Leveling Head to the input of the AC Measurement
Standard via a precision 50 Ω feedthrough termination. (If a Type-N
feedthrough termination is not available, use a 50 Ω BNC feedthrough
termination and appropriate adapters.)
Note
For measurements made with the AC Measurement Standard during
calibration adjustment, use a common mode choke as described in
the Level Accuracy Test. Connect the choke input low to the AC
Measurement Standard chassis ground. Keep the ground
connection as short as possible and set the AC Measurement
Standard to Internal Guard.
6. Set the UUT to OPER.
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