288 Chapter 2
Performance Verification Tests
32. Spurious Responses: Agilent E4404B, E4405B, E4407B, and E4408B
13.Calculate the 1.55 GHz Second Harmonic Intercept (SHI) using the
second harmonic suppression value read in step 12 and the 300 MHz
Frequency Response Error (FRE) from Table 2-76 as follows:
For example, if the second harmonic suppression is –93 dB, and the
1.55 GHz FRE is –1.05 dB, the SHI would be 81.95 dBm:
14.Record the 1.55 GHz SHI as Entry 7 in the performance verification
test record.
Measuring 3.1 GHz Second Harmonic Distortion
1. Replace the 1.8 GHz low pass filters with the two 4.4 GHz low pass
filters as shown in Figure 2-50. Two filters are necessary to reduce
the second harmonics from the source to less than –110 dBc.
2. On the synthesized sweeper, press the following:
CW, 3.1 GHz
POWER LEVEL, 6dBm
3. Enter the power sensor 3 GHz calibration factor into the power
meter.
4. On the analyzer, press the following:
FREQUENCY, 3.1 GHz
AMPLITUDE, Ref Level, 0 dBm
AMPLITUDE, Attenuation, 10 dB (Man)
5. On the analyzer, press the following:
Peak Search (or Search)
AMPLITUDE
Presel Center
6. Adjust the synthesized sweeper power level until the power meter
reading is 0 dBm ±0.1 dB.
7. On the analyzer, press the following:
Peak Search (or Search)
Marker
Delta
8. On the analyzer, press the following:
FREQUENCY, Center Freq, 6.2 GHz
9. See Figure 2-50. Remove the 4.4 GHz low pass filters and connect