HP 8562E, Service Manual

Page: 72 / 482

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Log Amplifier Adjustments
Set the spectrum analyzer controls as follows:
Center frequency
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...15 MHz
Span . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..O
Reference level
. . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -10
dB/division . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 dB/DIV
Resolution bandwidth . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300
IFADJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OFF
Set up an HP 3335A as follows:
Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...15 MHz
Amplitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -18dBm
Press (CAL), IF STATE, wait for the analyzer to complete adjustments, then
for maximum on-screen amplitude. Refer to Figure 2-10 for the location of
Press (LINE) to turn the spectrum analyzer off. Remove the spectrum analyzer cover
and place the spectrum analyzer in the service position as illustrated in Figure 2-9. See
Figure 2-10 for adjustment location.
Connect the HP 3335A 50 output to the spectrum analyzer 50 input. Press to
turn the spectrum analyzer on.
Press LINEAR, MORE of 3 , AMPTD UNITS ,
IF ON OFF, (OFF).
Set the spectrum analyzer controls as follows:
Center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...15 MHz
Span . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Resolution bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300
Reference level
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -10
Set up an HP 3335A as follows:
Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...15 MHz
Amplitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -10
Press
[
PEAK SEARCH
),
DELTA .
Reduce the HP 3335A input power to -58
If the delta marker amplitude reads -40 no adjustment is necessary.
If the signal is lower on the screen than expected (delta marker amplitude reads less than
then adjust (see Figure 2-10) for an even lower level and press (CAL],
ADJ IF STATE . Allow sufficient time for the analyzer to complete the adjustment.
If the signal is higher on the screen than expected (delta marker amplitude reads greater
than -38
then adjust for an even higher level signal and press
ADJ IF STATE. Allow sufficient time for the analyzer to complete the adjustment.
2-32 Adjustment Procedures