36
User’s and Service Guide N5281-90001
N5281A
Operational Check
Attenuator Element Verification Procedure
The Attenuator Element Verification Procedure is a functional test only. This test verifies the
functionality of the variable attenuator in each channel RF path. The following procedures are
used with the 11713C attenuator switch driver.
1. Connect the cables from the test set to the 11713C as shown in
Figure 18 on page 24
.
2. Select
[Preset]
.
3. Select
[Freq]
>
Frequency Offset
>
select Frequency Offset (ON/OFF)
>
OK
. Refer to
Figure
20 on page 30
.
4. Set the IF Switch Config On. Select
Trace/Chan
>
Channel
>
Hard ware Setup
>
IF Switch
Config
. Refer to
Figure 21 on page 31
.
5. Select all of the IF Inputs
External A, B, R1 and R2
>
OK
. Refer to
Figure 22 on page 31
.
6. Select
[Analysis]
>
Statistics On
.
7. Connect the cable to A, RF INPUTS on the test set. Select
[Meas]
>
Receivers and select A
>
Apply
>
OK
. Refer to
Figure 23 on page 32
.
8. Select
[Memory]
>
Normalize
.
9. Select
[1]
on the 11713C. The mean value should read -10 dB (± 1 dB). Select
[1]
again,
it should read 0 dB.
10.Select
[2]
on the 11713C. The mean value should read -20 dB (± 1 dB). Select
[2]
again,
it should read 0 dB.
11.Select
[3]
on the 11713C. The mean value should read -5 dB (± 1 dB). Select
[3]
again,
it should read
0 dB.
12.Repeat
step 7
through
step 11
for Channel B, C and D RF INPUTS.
