58 Chapter 2
Test Descriptions
Noise Figure Range and Accuracy
Step 3. Set the Switch Driver as follows:
1. Ensure the
LOCAL LED is on.
2. Set the attenuator to 0dB. The settings are as follows:
Step 4. Set the NFA as follows:
1. Ensure that the preset is set to factory settings (press the
System key,
then
More, Power On (Preset), Power On Preset and Preset (Factory)).
2. Press the
Preset key and wait for the routine to finish.
3. Set the measured result to Phot (press the
Result key and Phot).
4. Set sweep to single (press the
Sweep key and Sweep Mode (Single)).
5. Set the frequency mode to fixed (press the
Frequency/Points key and
Freq Mode, Fixed).
Table 2-13 Switch Driver Attenuator Settings (1 = LED On, 0 = LED Off)
1dB Step Attenuator
Attenuator X
1234
00000
11000
20100
31100
40010
51010
60110
71110
80011
91011
10 0111
11 1111
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