1. G E N E R A L
2. F E A T U R E S
Y o u r K E N W O O D ' S E l e c t r o n i c V o l t m e t e r , Model V T - 1 7 1 ,
r " V T - 1 7 1 E J , is a voltmeter of absolute-mean value
indication type capable of measuring A C voltages
f r o m I m V T S O O ^ V J to 300V r 100VJ in the frequency
range as wide a s 5Hz to 1MHz on root-mean-spuare
value scales. Y o u r V T - 1 7 1 T V T - 1 7 1 E J is a v a i l a b l e in
v a r i e t y of applications as it is highly sensitive and responds
accurately to given voltages in such a wide frequency
range. F o r use on production lines, it can be controlled
by a remote control device ( o p t i o n ) .
T h i s manual oovers t w o models, the V T - 1 7 1 and
V T - 1 7 1 E .
Most dest descriptions are common to both models.
Where there are differences, the descriptions for
the V T - 1 7 1 E are shown enclosed by T J .
a . D u a l power d i f f e r e n t i a l input a m p l i f i e r s used in the
entire circuit provide a high r e l i a b i l i t y and good
c h a r a c t e r i s t i c of restoration f r o m possible s a t u r a t i o n
due to excessive inputs.
b. A large-sized T a u t - b a n d meter has a high s e n s i t i v i t y
and r e l i a b i l i t y .
c. The number of adjusting t r i m m e r s are minimized
w i t h the use of the a m p l i f i e r s which are precisely
calculated in the open loop gains and are negative-
biased through m e t a l - f i l m resistors as accurate as 1%.
The a m p l i f i e r c h a r a c t e r i s t i c s , therefore, are free f r o m
any secular change.
d. The input resistance is a s high as 1 0 M O in a l l
ranges and its parallel capacitance is 4 5 p F or lower.
e. The meter scales are graduated in the root-mean-
square values f o r sinusolidal waves. A l s o , the meter
has a d B and d B m scales convenient f o r measuring
relative values.
f. The output t e r m i n a l a l l o w s your V T - 1 7 1 T V T - 1 7 1 E J
to use as a high-gain, wide-band a m p l i f i e r .
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