HP 8560E - Page 435

434 Chapter8
IF Section
A5 IF Assembly
9. On the HP 8560E/EC, press PRESET and set the controls as follows:
Center frequency ......................................................300MHz
Span ..............................................................................5MHz
10.On the HP 8560E/EC, press
SGL SWP and CAL.
11.Simultaneously press
SINGLE on the HP 8566A/B and ADJ CURR IF
STATE on the HP 8560E/EC. The IF signature is displayed on the HP
8566A/B display. It may be necessary to experiment with different
time intervals between initiating the sweep on the HP 8566A/B and
initiating the current IF state adjustment on the HP 8560E/EC.
12.Compare the IF signature to the signature of a properly operating
spectrum analyzer illustrated in Figure 8-3 on page 435. If the
signatures do not closely resemble each other, a more detailed view
of the signature may show the failed hardware.
a. Set the HP 8566A/B controls as follows:
Sweep time ........................................................ 550ms
dB/DIV ................................................................... 5dB
Reference level ................................................ − 5 dBm
b. Press
SINGLE on the HP 8566A/B and, a very short time later,
press
ADJ CURR IF STATE on HP 8560E/EC. Figure 8-4 on page
436 through Figure 8-8 on page 440 illustrate detailed IF
signatures of a properly operating HP 8560E/EC. It may be
necessary to experiment with different time intervals between
initiating the sweep on the HP 8566A/B and initiating the current
IF state adjustment on the HP 8560E/EC to obtain the waveforms
shown. Note the changes in the HP 8566A/B video bandwidth and
sweep time.
13.Reconnect W27 (coax 3) to A5J5.