(1)
F r e q u e n c y r e s p o n s e
W a y s To Better Dual-Channel Voltmeter Operation
The t w o input channels and t w o meter pointers arranged
s p e c i f i c a l l y in V o l t m e t e r are most useful f o r measuring
an electronic equipment having t w o signal sources.
F o r example, V o l t m e t e r is f a r more convenient f o r
measuring stereo left and right channel c h a r a c t e r i s t i c s
than using t w o units units of usual single-channel
voltmeter.
S T E R E O A M P
C H 2 S E L E C T O R s w i c h to pressed (interlock p o s i t i o n )
as most stereo a m p l i f i e r s are not deviated
v e r t u a l l y in the left and right channel levels. Set the
G N D M O D E s w i t c h to " G N D . " If the given stereo
a m p l i f i e r output has no connector common to the left
and right channels, then t u r n t he s w i t c h to " O P E N " a n d
connect the G N D post on the rear panel of voltmeter to
t h a t of the stereo a m p l i f i e r . '
- 1 2 -
2«/2
• Absolute-mean v a l u e = • x = 0 . 9 x .
it
2«/2
2
• Root-mean-square v a l u e = — — - x •—— x =
7u
v 3
4 x / 2
— — x = 1.04 x
TTVO
4<s/2 ^ 4V2
• Peak v a l u e = - x v 3 x = -~ x = 1.8x .
TV
v
3
71
Rch
L c h
Figure 6 - Stereo Amplitier Frequency
Response Measurement
