Agilent Technologies E4406A, User Manual

Page: 157 / 230

Chapter 5 157
Functional Testing
Input Attenuator Accuracy at 50 MHz
5. Perform the following steps for each attenuator setting listed in
Table 5-10 :
a. Press
Input
,
Input Atten
, “n”, and
dB
. Where “n” is the attenuation
value in the Input Attenuator column of Table 5-10 .
b. Press
Restart
.
c. Press
Search
.
d. Read the marker value in dBm.
e. Record the measured value in the Measured Value X
i
column of
Table 5-10
6. Calculate attenuator accuracy for each attenuator setting using the
following equation:
Attenuator_Error
i
=
Χ
i
− Χ
ref
7. Record the attenuator error in the Attenuator Error column of Table
5-11, “Attenuator Check at 50 MHz.”
Table 5-10 Measurement Settings
Input Attenuator
(dB)
Measured Value X
i
(dBm)
0
1
2
4
5
10 X
ref
=
20
40