Chapter 2 167
Performance Verification Tests
22. Frequency Response: Agilent E4401B and E4411B
Video BW, 3 kHz (Man)
5. Adjust the source AMPLITUDE to obtain the Channel B power
meter reading recorded in Table 2-40 ±0.1 dB.
6. Record the current Channel B power reading in Table 2-41 as the
Current Channel B reading.
7. On the analyzer, press Single then Peak Search (or Search).
8. Record the marker (Mkr1) amplitude reading in Table 2-41.
9. Set the source to the next frequency listed in Table 2-41.
10.Set the analyzer center frequency to the next frequency listed in
Table 2-41.
11.Adjust the source AMPLITUDE to obtain the Channel B power
meter reading recorded in Table 2-40 ±0.1 dB for the current
frequency.
12.Record the current Channel B power meter reading in Table 2-41 as
the Current Channel B Reading.
13.On the analyzer, press Single then Peak Search (or Search).
14.Record the marker (Mkr1) amplitude reading in Table 2-41.
15.Repeat step 9 through step 14 for each frequency in Table 2-41.
16.Copy the splitter tracking errors from Table 2-40 into Table 2-41.
17.Calculate the Flatness Error for each frequency in Table 2-41 as
follows:
For example, if marker (Mkr1) Amptd is –10.32 dBm, Current
Channel B is –10.2 dBm and Splitter Tracking Error is 0.18 dB,
Flatness Error would be –0.30 dB.
18.Record the Flatness Error for 50 MHz below as the 50 MHz
Ref Amptd:
50 MHz Ref Amptd __________
19.Calculate the Flatness Relative to 50 MHz for each frequency in
Table 2-41 as follows:
For example, if Flatness Error is –0.30 dB and 50 MHz Ref Amptd is
Flatness Error Mkr1 AmptddBm Current Channel BdBm Splitter Tracking ErrordB
––=
Flatness Relative to 50 MHz Flatness Error 50 MHz Ref Amptd–=