Agilent Technologies 8590 Series Service Manual page 60

Making Adjustments
6. Cal Attenuator Error
1 dB Step Check
6. To measure the 1 dB step correction, press the following analyzer
keys.
, 25,
FREQUENCY
, 10,
SPAN MHz
75 Ω input:
AMPLITUDE
, 18,
AMPLITUDE
SCALE LOG LIN
AMPTD UNITS, dBm
PEAK SEARCH
,
MKR FCTN MK TRACK ON OFF
, 50,
SPAN kHz
, 3,
BW kHz
VID BW AUTO MAN
7. Press the following analyzer keys.
,
PEAK SEARCH
,
MKR FCTN MK TRACK ON OFF
8. The MKR ∆ amplitude reading should be 0.0 dB ±0.01 dB. If it is not,
repeat step 7.
9. Set the analyzer by pressing
10.Set the amplitude of the synthesizer/level generator to −18 dBm.
11.Press on the analyzer.
MKR
12.Record the MKR ∆ amplitude reading in
attenuator step error of the A12 amplitude control assembly.
60
MHz
,
More 1 of 2, AMPTD UNITS
−dBm
(LIN),
More 1 of 2
(ON)
, 300,
Hz
MARKER DELTA
(ON)
AMPLITUDE
,
dBm
−dBm
, 17, .
Table 2-2. This is the 1 dB
Chapter 2