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(NOTE:
Some nonlinearity above 200 kHz is nor-
mal and not specified.)
3. If the waveform is bad in one or more of the four
lowest ranges (.1, 1, 10, 100), but the remaining
ranges are normal, refer to paragraph 6.4.9.
4. Verify square wave symmetry at FUNC OUT is in
specification. If not and cannot be calibrated,
refer to paragraph
6.3.10.
5.
If none of the above conditions apply, refer to
figure 6-4.
6.3.7 Sync Output Distorted or missing (FUNC
OUTNormal)
Improperly set controls:
1. Because the FUNC OUT is normal, this cannot be
caused by improperly set controls.
6-4
Functional block isolation:
1. Verify power supply voltages are within
±
5% of
nominal with less than 100 mVp-p of ac ripple. If
not, refer to paragraph 6.4.1.
2. Check the triangle for nonlinearity at FUNC OUT.
If it is nonlinear, but only on one range, check for
a leaky capacitor on that range. If the triangle is
nonlinear on more than one range, check for a
leaky capacitor or faulty active component in the
frequency multiplier and triangle buffer circuits.
6.3.6 TriangleDistortedor Missing
Improperly set controls:
1. SYM button depressed.
2. Excessive dc offset overdriving output
amplifer.
Figure6·2. SquareOutput Troubleshooting
REFER TO
PREAMPLIFIER
GUIDE 6.4.14
REFER TO
SQUARE
SHAPER
GUIDE 6.4.12
CHECK
OUTPUT
ATTENUATOR
REFER TO
OUTPUT
AMPLIFIER
GUIDE 6.4.15
YES
REFER TO LOOP
DELAY COMPENSATION
GUIDE 6.4.3 INCLUDING
-ICMP
AND +ICMP
VOLTAGES
--------
IF THE ABOVE
VOLTAGES ARE NOR·
MAL REFER TO
HYSTERESIS SWITCH
GUIDE 6.4.5
NO
IF THE PROBLEM
IS
FREQUENCY
RELATED,
SET UNIT TO THAT
FREQUENCY
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Table of Contents
Troubleshooting
