HP 85662A, Руководство по устранению неисправностей и ремонту

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through 26 give the step gain errors. Acceptable error is Locations of the correction
data are given in Table l-l.
1 0
C O R R ’ D
C E N T E R
R E F . O 1 0
I I I I I I
M H z
S P A N 1 . 0 0 M H z
E S 1 0
V B W 1 0
3 0
Figure 6. Error Correction Routine Data
Table 1. Locations of Step Gain Calibration Data
-10 -20 -30 - 4 0 - 5 0 - 6 0
Step Gain
A20 A10
Control Line
assembly) assembly)
Calibration Line
26 25
24
23 22 21 20
The and circuitry of the to A15.9 Attenuator is activated by the
following routine. First, connect a 1 step attenuator between CAL OUTPUT and the
input to the analyzer. Set this attenuator to 10 press Instrument Preset, and key in the
following:
equal to the CAL OUTPUT frequency
0 Hz
LOG SCALE
1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20 s
-10
Press sweep and repeatedly press the DATA STEP key. The display should
appear as in Figure 7. If every other step is missing, the control line is faulty. Check
the circuitry on the IF Control board to find the defective component. If
6