Agilent Technologies 8590 Series Service Manual page 55

Final LC Centering
36.Press the following analyzer keys.
, 30,
BW kHz
, 100,
SPAN kHz
,
PEAK SEARCH
, 100,
BW kHz
37.Make final adjustments by adjusting A11C23, A11C45, A13C23, and
A13C45 in succession to peak the amplitude of the marker at
center-screen.
38.Repeat step 36 and
bandwidths are centered in relation to each other.
39.Press the following analyzer keys.
, 30,
BW kHz
PEAK SEARCH
MARKER ∆
, 100,
BW kHz
PEAK SEARCH
40.Verify that the MARKER ∆ frequency does not exceed 10 kHz.
If the signal shift is out of tolerance, repeat
Crystal Amplitude
41.Press the following analyzer keys.
, 30,
BW kHz
, 10,
SPAN kHz
PEAK SEARCH
MARKER ∆
,
MKR FCTN MK TRACK ON OFF
, 1,
BW kHz
42.Adjust A11R31 XTL and A13R31 XTL equally for a MARKER ∆
amplitude reading of 0 dB. Each potentiometer should be adjusted to
accomplish one-half of the necessary increase in signal amplitude.
43.If A11R31 or A13R31 reaches its limit, recenter both potentiometers
and repeat step 41
Chapter 2
MARKER → CF
step 37 until the 30 kHz and 100 kHz
(ON)
and step 42.
Making Adjustments
5. Crystal and LC Bandwidth Filter
step 26 to step 39.
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