HP 8562E Service Manual page 349

FULL
IF ADJUSTSTATUS: 300 kHz RBW
period, the voltage should be within a 2 to 10 Vdc range.
d. Observe the DVM reading while
reading should be within the 2 to 10 Vdc range.
e. If the DVM reading is outside the range in step c but inside the range in step d, suspect
a reactive component of the filter.
8. If the ALC loop is working correctly (A4J9 pin 4 within the test tolerances given), then
either the output attenuator is defective, or A4U810 pin 6 (in ALC loop integrator) is
outside of its +3 to +6 Vdc range.
9. Reconnect W52 (coax 9) to A5J4.
1. If the 3 dB bandwidth of one of these filters is incorrect, suspect a failure of one of the five
available sweeps from the cal oscillator sweep generator (function block Z). These sweeps
are generated by changing the switch settings of A4U803 which routes signals through
2. Disconnect W52 (coax 9) from A4J8.
3. Connect an SMB tee to A4J8, using a short coaxial cable with SMB connectors.
4. Connect one output of the tee to cable W52 (coax 9).
5. Connect an HP 85024A active probe to the other output of the tee.
6. Connect the output (type N connector) of the active probe to the input of the
HP 8566A/B spectrum analyzer.
7. Connect the probe power cable to the HP 85623 spectrum analyzer front-panel PROBE
POWER connector (you may need to use a probe power extension cable, HP 10131B).
8. Press
PRESET
Center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.8 MHz
Span . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 Hz
Reference level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -43 dBm
Resolution bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 kHz
Videobandwidth
Sweep time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50ms
Scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 dB/division
Sweep . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Single
9. On the HP 8562E spectrum analyzer, press (jj] and (CAL).
FULL IF ADJ
the HP 8566A/B.
11. The HP 8566A/B screen illustrates frequency versus time of the cal oscillator output
sweeps. See Figure 9-16. The slope of the HP 8566A/B 100 kHz resolution bandwidth is
used to detect frequency changes. Sweeps that vary (greater than 30 percent) from the
normal levels, trigger error code
FULL IF ADJ
HP 8566A/B.
9-34 IF Section
and
IF ADJUST STATUS: AMPLITUDE
on the HP 8566A/B and set the controls as follows:
)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10kHz
. When the display reads
ERR 581 or
. When the display reads
IF ADJUST STATUS: 3 kHz RBW.
ADJUSTING IF: 10 kHz RBW,
ERR 582.
ADJUSTING IF: 3 kHz,
Duringthistime
is displayed. The
press cm) on
press (ml on the