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fullscale deflection.
Next set the meter c a l i b r a t o r output level to
themeter range switch to the 1V range.
A d j u s t V R 1 of the Input
deflection.
7.
F o r adjustment of the 10/4V to 300/A/ ranges use
a calibrated resistive attenuator
of
100 iN.
Set the meter range to
adjust V R 2 of the Input
deflection.
8.
T o adjust the 10/iV range of the
the calibrator output to
range s w i t c h to the 10/A/ position.
of the Input
Unit f o r a fullscale deflection.
9.
Depress the A V E R A G E / P E A K
W E I G H T switches in the F L A T condition.
done in step 5, adjust V R 7 o f the Output
for a f u l l s c a l e deflection.
10. Remove the c a l i b r a t o r and connect a wideband
oscillator to the I N P U T .
frequency to
1kHz a n d the meter range switch
1 V .
A d j u s t the oscillator output level for a .
fullscale deflection
in this
1V and
Unit
for a fullscale
to obtain an output
100/iV and
Unit for a fullscale
VT-172, set
10/iV and set the meter
A d j u s t
V R 2 0 1
switch and leave the
A s w a s
Unit
Set the
oscillator
to
condition.
11. S h i f t the oscillator frequency to 100kHz and use
the T C 1 on the Input
fullscale deflection.
12. Repeat the above procedure.
A C - D C O U T adjustment
Depress the A V E R A G E / P E A K
leave the W E I G H T switches in the F L A T
1)
A C - O U T
adjustment
Apply a signal so t h a t
A d j u s t V R 8 so t h a t the A C O U T is 1 V r m s .
2)
D C - O U T
adjustment
Short c i r c u i t the input and adjust
the D C O U T is O V .
meter reads for fullscale.
A d j u s t V R 9 so t h a t the D C O U T is 1V. Repeat
above procedure until the specified value is obtained.
- 1 4 -
U n i t to adjust the meter
switch on the panel and
condition.
the meter reads for fullscale.
V R 1 0 so t h a t
A p p l y a signal so t h a t
for
the
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