Agilent Technologies E4406A, Руководство пользователя

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Chapter 5 147
Functional Testing
Frequency Response (Flatness)
7. Configure equipment as shown in Figure 5-2, “Frequency Response
Test Setup”.
8. Adjust the synthesized sweeper amplitude for a power meter display
of
−
10.00 dBm,
±
0.1 dB.
NOTE
The power level remains unchanged for the duration of the test.
9. Press
Search
to position the marker on the peak of the signal.
10. Refer to Table 5-4, “Frequency Responses Report”. Enter the
amplitude of the signal as displayed on the instrument under the
UUT Amplitude Meas
Amp
column of Table 5-4 .
11. Enter the power meter reading under the Power Meter Amplitude
Power
meter
column of Table 5-4 .
12. Compute the flatness error using the following equation and record
the results under the Flatness Error Flat
error
column:
Flat
error
= Meas
amp
−
Power
meter
13. Perform the following steps for each frequency setting listed in
Table 5-4 :
a. Tune the source to the next frequency listed in the Center
Frequency column.
b. Set the UUT center frequency by pressing
Frequency
,
Center
, “n”,
and
MHz
. Where “n” is the next frequency value in the Center
Frequency column.
c. Press
Search
.
d. Enter the power meter reading under the Power Meter Amplitude
Power
meter
column.
e. Enter the instrument reading under the
UUT Amplitude Meas
amp
column.
f. Compute the flatness error using the following equation and
record the results under the Flatness Error Flat
error
column:
Flat
error
= Meas
amp
−
Power
meter
The flatness error should be less than
±
2dB (4 dB peak-to-peak)
from 10 MHz to 4 GHz.