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Chapter 2 227
Performance Verification Tests
26. Frequency Response (Preamp On): Agilent E4402B
generator) as follows:
a. Record the Flatness Error from Table 2-61 at 10 MHz using the
function generator as FlatError
FG
:
FlatError
FG
=__________ dB
b. Record the Flatness Error from Table 2-61 at 10 MHz using the
synthesized sweeper as FlatError
SS
:
FlatError
SS
=__________ dB
c. Subtract FlatError
SS
from FlatError
FG
and record the result as
the Setup Change Error:
Setup Change Error =__________ dB
29.For frequencies less than 10 MHz calculate the Flatness Relative to
50 MHz for each frequency in Table 2-61 as follows:
For example, if Flatness Error is –0.30 dB, 50 MHz Ref Amptd is
0.15 dB, and Setup Change Error is –0.19 dB, Flatness Relative to
50 MHz would be –0.26 dB.
30.For frequencies 10 MHz and greater, calculate the Flatness Relative
to 50 MHz for each frequency in Table 2-61 as follows:
For example, if Flatness Error is –0.30 dB and 50 MHz Ref Amptd is
0.15 dB, Flatness Relative to 50 MHz would be –0.45 dB.
Setup Change Error FlatError
FG
FlatError
SS
–=
Flatness Relative to 50 MHz Flatness Error 50 MHz Ref Amptd– Setup Change Error–=
Flatness Relative to 50 MHz Flatness Error 50 MHz Ref Amptd–=
Table 2-61 Frequency Response Worksheet, Preamp On
Frequency
Current
Channel B
Reading
Mkr1 Amptd
Splitter
Tracking
Error
Flatness
Error
Flatness
Relative to
50 MHz
1 MHz
5 MHz
10 MHz
a
10 MHz
b
20 MHz
50 MHz 0 dB (Ref)
75 MHz