Chapter 2 193
Performance Verification Tests
24. Frequency Response, Agilent E4404B, E4405B, E4407B, and E4408B
18.Set the function generator amplitude to –4 dBm.
19.Set the function generator frequency to 100 kHz.
20.On the analyzer, press FREQUENCY, Center Freq, 100 kHz.
21.Adjust the function generator amplitude to obtain the Channel B
power meter reading recorded in Table 2-49 ±0.1 dB for 100 kHz.
22.Record the current Channel B power reading in Table 2-50 as the
current Channel B reading.
23.On the analyzer, press Single then Peak Search (or Search).
24.Record the analyzer marker (Mkr1) Amplitude Reading in Table 2-50
as marker (Mkr1) Amplitude.
25.Repeat step 19 through step 24 for frequencies between 100 kHz and
10 MHz.
26.Copy the Splitter Tracking Errors from Table 2-49 into Table 2-50.
27.Calculate the Flatness Error for each frequency in Table 2-50 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.
28.Record the Flatness Error for 50 MHz below as the 50 MHz
Ref Amptd:
50 MHz Ref Amptd: __________
29.Continue with step 31 if the analyzer under test is an Agilent
E4407B with Option UKB and is being tested in ac coupled mode.
Calculate the setup change error (error due to changing the test
setup from using a synthesized sweeper to using a function
generator) as follows:
a. Record the Flatness Error from Table 2-50 at 10 MHz using the
function generator as FlatErrorFG:
FlatErrorFG=__________ dB
b. Record the Flatness Error from Table 2-50 at 10 MHz using the
synthesized sweeper as FlatErrorSS:
FlatErrorSS=__________ dB
c. Subtract FlatErrorSS from FlatErrorFG and record the result as
the Setup Change Error:
Flatness Error Mkr1 AmptddBm Current Channel BdBm Splitter Tracking ErrordB
––=
Setup Change Error FlatErrorFG FlatErrorSS
–=