Chapter 2 277
Performance Verification Tests
32. Spurious Responses: Agilent E4404B, E4405B, E4407B, and E4408B
20.On the analyzer, press BW/Avg, Average Off.
21.On the analyzer, press FREQUENCY, Center Freq, ↑, ↑, ↑. The center
frequency should now be one CF Step value above synthesized
sweeper 2 frequency.
22.Set synthesized sweeper 1 CW to F2 as indicated in Table 2-74.
23.Set synthesized sweeper 2 CW to F1 as indicated in Table 2-74.
24.On the analyzer, press BW/Avg, Average, 20, and wait for “Vavg 20”
to appear along the left side of the display.
25.On the analyzer, press Peak Search (or Search) and record the marker
amplitude reading in Table 2-75 as the Upper Distortion Amplitude.
26.On the analyzer, press BW/Avg, Average Off.
27.Of the Lower Distortion Amplitude and Upper Distortion
Amplitudes recorded in Table 2-75, enter the most positive value as
the Worst Distortion Amplitude in Table 2-75. For example, if the
Upper Distortion Amplitude is –62 dBc and the Lower Distortion
Amplitude is –63 dBc, enter –62 dBc as the Worst Distortion
Amplitude.
28.Enter –17 dBm as the Mixer Level in Table 2-75 (–12 dBm input
power – 5 dB input attenuation).
29.Calculate the equivalent TOI by subtracting one half of the Worst
Distortion Amplitude (in dB) from the Mixer Level (in dBm). Enter
the result in Table 2-75 as the Calculated TOI. For example, if the
Worst Distortion Amplitude is –62 dBc and the Mixer Level is –17
dBm, the Calculated TOI would be:
30.Record the Calculated TOI in the performance verification test
record as specified in Table 2-75.
TOI 17 dBm 62 dB
2
--------------–
⎝⎠
⎛⎞
–– 17 dBm 31 dB+– +14 dBm===
Table 2-75 Third Order Intermodulation Distortion Worksheet
TOI Test
Lower
Distortion
Amplitude
Upper
Distortion
Amplitude
Worst
Distortion
Amplitude
Mixer
Level
Calculated
TOI
Test
Record
Entry
11)
Option 1DR 2)
23)
34)