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7
r
4 . H E A D A Z I M U T H A D J U S T M E N T
In form ation
This alignment is one of the most important among
the mechanical adjustments. It affects equalization
and recording bias.
Effect of improper alignment.
a. Mis-alignment causes a loss in output at short
wavelengths
especially
when
playing
tapes
which were recorded by other decks.
b. When adjusting the playback equalizer leaving
the azimuth
improper,
the loss of azimuth
should be compensated by the equalizer which
will deteriorate
S/N.
Fig. 3 shows the rela-
tions among equalizer curve, frequency charac-
teristics and S/N.
2
4
6
8
1 0
10 " 2oo 30 "
A ngle o f incli nati o n lo ss . ->
c T - F s | 1 9 1
Adjustment
While reproducing the 10kHz signal on the azimuth
alignment test tape (STD-341), adjust the output
level to maximum. The tape selector should be
set to STD. Be sure to lock with paint after adjust-
ment.
P hoto
mV meter
4
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5
o
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3.
-
U'
@
J
a
F i g . 2
r
li. ;.
-
O U I P I I
\ .
I i P U I
' P r A r ,
l i
, r t c '
P o l
6 L / A \ , 6 )
' t l . - , i - t " l
;=tO.lr@l n tOl(Ol I
- - r ! Y . : f
I
t
W i t h a z i m u t h p r o p e r l y a d j u s t e d .
H i s s n o i s e p r o p e r t o t a p e s
F i g . 3 - a
n o t p r o p e r l y a d j u s t e d
F i s . 3 - b
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