6.9 F/V Converter
6-207
Chap. 6
CONTROL OPTIONS
6.9.5 Adjustment method
• The switches and volumes inside the option have been adjusted at the factory. Never touch a volume or switch
other than those used for adjustment by the user.
(1) Adjust SC1 to SC3 depending on the input form and usage.
(2) Set VR1 and VR3 as 0 notch.
(3) Adjust VR2 so that the voltage output S4 and S5 become
minimum with the minimum frequency input.
(4) Adjust VR1 and VR3 so that the voltage output S4 and S5
become maximum with the maximum frequency input.
(5) Repeat (3) and (4) until the settings converge.
(For S4, the polarity of the output is reversed depending on the
A- and B- phases when SC3: 1-2 is shorted.)
Table 6.9.4
Adjustment
position
Name Adjustment contents
1-2 side: (Threshold level 5.1 V) V
L
= 0 to 1 V, V
H
= 8 to 15 V
3-4 side: (Threshold level 2.5 V) V
L
= 0 to 1 V, V
H
= 3.5 to 5 V
SC1
Input frequency switching
Common to A- and
B-phase pulses
5-6 side: (A, A, etc. for differential input)
1-2 side: Maximum input frequency 5 to 10 kHz
3-4 side: Maximum input frequency 10 to 20 kHz
SC2
Input frequency division
switching
5-6 side: Maximum input frequency 20 to 40 kHz
1-2 side: Double polarity (S4 becomes negative with A-phase delayed)
*Note 1
3-4 side: Single polarity, output polarity is fixed (S4 is positive).
SC3
F/V output polarity
switching
5-6 side: Single polarity, output polarity is fixed (S4 is negative).
VR1 Gain adjustment Adjust the gain against the voltage output S4.
VR2 Bias adjustment Adjust the F/V bias.
VR3 Gain adjustment Adjust the gain against the voltage output S5.
* Refer to Note 1.
Table 6.9.5
Input square wave (voltage pulse input) S4 output
A-phase delay
A-phase
B-phase
Negative polarity
A-phase
advance
A-phase
B-phase
Positive polarity
Turning each volume clockwise
increases the set value.
Figure 6.9.5
0 10
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