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MXH Multiplier Option Manual
1.3.3. Adjustment Procedure
1. Verify that oscilloscope is isolated from ground.
N O T E : An oscilloscope that is not isolated may cause permanent damage to the multiplier.
2. Connect signal common of scope to TP5 (2.5 VDC reference voltage), channel A scope probe to TP10
(COS-N), and channel B scope probe to TP9 (SIN-N). Refer to
3. Display encoder signals as a Lissajou pattern on the oscilloscope (x y mode).
4. Set channels A & B of the oscilloscope for 0.5 VDC per division, and zero the scope reference to the
center of the display.
5. Move table over the entire range of travel at a low speed, and verify that the peak to peak amplitude of
the circular pattern is between 2 to 3.9 Vp-p.
6. Move the table to the area where the amplitude is the largest, and verify or adjust for the following. (See
Diagram A – Diagram H in
i. COS-N gain is 3.8 Vp-p (+/- 0.1 Vp-p). Adjust R16 if necessary.
ii. COS-N DC offset is 0 VDC (+/- 0.1 VDC). Adjust R15 if necessary.
iii. SIN-N gain is equal to COS-N gain (+/- 0.1 Vp-p). Adjust R18 if necessary.
iv. SIN-N DC offset is 0 VDC (+/- 0.1 VDC). Adjust R17 if necessary.
v. Phase error is 0 degrees (+/- 4.5 Degrees). Adjust R14 if necessary.
vi. Repeat steps 6i through 6v.
7. Move table over the entire range of travel at a low speed and verify the following information in
2.
Diagram A (Ideal)
SIN-N & COS-N Sweep Display No Phase, Gain or Offset Error
SIN-N
COS-N
0.5 VOLT/DIVISION
0.1 MILLISECOND/DIVISION
Figure 1-4:
12
Figure 1-4
and
Figure 1-5
Ideal Oscilloscope Displays (Sweep and Lissajou)
Chapter 1
Figure 1-6
for MXH part locations.
for examples.)
Diagram B (Ideal)
SIN-N & COS-N Lissajou Display No Phase, Gain, or Offset Error
SIN-N
0.5 VOLT/DIVISION
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Introduction
Table 1-
COS-N
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