( 2 ) AFP ( Automati c Final P rote c tion)
a ) Conn e c t the Y P -1 5 0 to the antenna c o nnecto r . Set VR2 0 5
to the extreme C C W po s ition . C onnect the VTVM to cathode
(+)
of D 2 0 8 and g round ( -) and adju s t VR2 04 for minimum
VTVM r e a ding .
b ) Slowly advanc e VR2 0 5 in C W (Clo ckwi s e ) di r e ction until the
output p owe r i s about to de c r e a s e .
( 3 ) PO Mete r
S e t VR2 0 3 to the point whe r e S mete r show s 8 with full output .
(4 ) D e viation
a) C o nne ct Y P -1 5 0 to the antenna c onne cto r , the output of an
audio o s cillator betwe en pin 2 (hot) and 1 (g round) of mi c ro
phone r e c epta cle and a deviation m ete r a s illu s trate d in Fig.
13.
S e t the audi o output level to 2 5 mV at
1
kHz.
b) Conn e c t a frequency c ounte r betwe en TP 3 of the P L L unit and
g r ound.
c ) K e y the transmitte r by g r ounding pin
3
of mi c r ophone r e cepta cle .
Adju s t T4 01 fo r a 1 0 . 7 MHz c ounter r eading .
d) Set the output level of the audio s ignal gene rato r to 2 5 mV at
1
K Hz and adju s t VR2 0 2 fo r
�
5 kHz deviation .
e )
�
e t the audio level to 2 . 5 mV. Adju s t VR2 01 fo r a deviation of
-2 . 5 kHz.
FT-227R
Deviation
Meter
Audio
Oscillator
Figure
13
P.0
Meter
(Dummy Load)
0
Oscillo
·
scope
counter
counte r
clo ckwis e clo ckwi s e clokwi s e clockwi s e
- 24 -
/
�"
;{ -�
F ront Vi ew
Rea r View
Figur e 14
Summary of Contents for FT-227R Memorizer
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