Chapter 2 61
Making Adjustments
6. Cal Attenuator Error
2 dB Check
13.Press the following analyzer keys.
AMPLITUDE, 16, −dBm.
14.Set the amplitude of the synthesizer/level generator to −17 dBm.
15.Press the following analyzer keys.
PEAK SEARCH
MARKER DELTA, MARKER DELTA
MKR FCTN, MK TRACK ON OFF (ON)
16.MKR ∆ amplitude reading should be 0.0 ±0.01. If it is not, repeat
step 15.
17.Set the analyzer by pressing
AMPLITUDE, 14, −dBm.
18.Set the amplitude of the synthesizer/level generator to −15 dBm.
19.Press
MKR on the analyzer.
20.Record the MKR ∆ amplitude reading in Table 2-2. This is the 2 dB
attenuator step error of the A12 amplitude control assembly.
4 and 8 dB Step Error
21.Repeat step 13 to step 20 for attenuator steps 4 dB and 8 dB. Use
Table 2-2 for synthesizer values and analyzer reference-level values.
Table 2-2 A12 Amplitude Control Assembly Attenuator Errors
SynthesizerSettings(dBm) Reference Level Settings
(dBm)
Attenuator
Step (dB)
Error
Attenuator
OFF
Attenuator
ON
Attenuator
OFF
Attenuator
ON
−19 −18 −18 −17 1 ____________
−17 −15 −16 −14 2 ____________
−18 −14 −17 −13 4 ____________
−19 −11 −18 −10 8 ____________
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