Chapter 2 67
Test Descriptions
Gain Measurement Uncertainty
Test Procedure
NOTE Throughout the Gain Measurement Uncertainty Test Procedure the
term ‘the Worksheet’ refers to the Gain Measurement Uncertainty Test
Worksheet 1 on page 69 or Worksheet 2 on page 71, and the term ‘the
Test Record’ refers to the Gain Measurement Uncertainty Test Record
detailed in the relevant Appendix for the model number being tested.
Step 1. Connect the equipment as shown in Figure 2-16.
Step 2. Set the Synthesized Sweeper as follows:
1. Press the
Preset key.
2. Set the frequency to 50 MHz (press the
CW key, then 5, 0, MHz).
3. Set the power level to -46 dBm (press
Power Level, then -, 4, 6,dB(m)).
4. Switch
RF ON.
5. Set the frequency mode to fixed (press
Frequency/Points key, Frequency
Mode
and Fixed).
6. Set the frequency to 50 MHz (press
Frequency/Points key, Fixed
Frequency
, then 5, 0, MHz).
Step 3. Ensure that the preset is set to factory settings (press the
System key,
then
More, Power On/Preset, Power On (Preset) and Preset (Factory)).
Step 4. Press the
Preset key on the NFA and wait until the routine is finished.
Step 5. Run the IF attenuator calibration routine (press the
System key, then
More, More and Service. Press Enter password, then -, 2, 0, 1, 0 and Enter.
Then press
Service, followed by IF Test and Gain Lin Test). The test takes
approximately 30 seconds to complete the routine.
Step 6. Record the results. Press the
Gain Lin Results menu item once the above
routine is complete. Use the tab keys below the display to scroll through
the results. Press [
|<—] or [—>|]). Record the Delta results along side the
corresponding index value in the Worksheet No. 1.
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