Keysight Technologies X Series Service Manual page 39

Overview
Service Equipment You Will Need
Step Attenuator Loss Characterization
The step attenuator combination should have each attenuator setting
characterized by a metrology lab at 50 MHz. The following tables show which
sections of the 10 dB and 1 dB step attenuators are utilized for each attenuator
setting. The tables also list the Allowable Uncertainty for each attenuator
setting. The interconnect cable should NEVER be disconnected once the loss
characterization is performed.
Table 1-2 1 dB Step Attenuator
Nominal Attenuation (dB)
0
1
2
3
4
5
6
7
8
9
a. TME requires that Section 3 be characterized.
Table 1-3 10 dB Step Attenuator
Nominal Attenuation (dB)
0
10
20
30
40
50
Keysight N9010A EXA Service Guide
Attenuator Section
#1 #2
(1 dB) (2 dB)
Off Off
On Off
Off On
On On
Off Off
On Off
Off On
On On
Off Off
On Off
Attenuator Section
#1 #2
(10 dB) (20 dB)
Off Off
On Off
Off On
On On
Off Off
On Off
#3 #4
(4 dB) (4 dB)
Off Off
Off Off
Off Off
Off Off
Off
a
On
On Off
On Off
On Off
On On
On On
#3 #4
(40 dB) (40 dB)
Off Off
Off Off
Off Off
Off Off
Off
a
On
On Off
Allowable Uncertainty (dB)
0 (Reference)
< 0.005
< 0.005
< 0.005
< 0.005
< 0.005
< 0.005
< 0.005
< 0.005
< 0.005
Allowable Uncertainty (dB)
0 (Reference)
< 0.010
< 0.015
< 0.020
< 0.025
< 0.030
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