Yaesu FT-902DM Instruction Manual page 48

V R 7 0 1
Q 7 0 3
o 9
Q 7
C a r r i e r u n i t ( P B - 1 7 0 6
7.
A LC LEVEL ADJU STMENT
S e t the M ETER swi tch to A L C , the
to U S B or LS B , the
MIC GAIN
clockwise , and the VOX GAIN c on trol to M O X .
the m e t e r reading is not fully deflected to the
I f
right, adjustment o f the A LC l evel con trol VR 2 0 1
on PB- 1 9' 9 4 will be required . Adjust V R 2 0 1 for a
3 5 0
( full scal e ) and re turn the VOX
reading o f
GAIN con trol to PTT.
8 .
R F SPEECH PROCESSOR A D J USTMENT
Tune up the transceiver on U S B at 1 4. 2 M H z . S e t
V R 2 0 2 and the P ROC LEV E L con trols t o the .
center of their range . Apply a
to the m icrophone input and adjust i ts level to
the p oi n t where p ower outpu t levels o ff after
reaching its m aximum value ; d o n o t advance the
i n pu t l evel past the saturati on poin t . Adjust V R 2 0 3
so as t o ob tain the same power outpu t when the
RF Processor swi tch is in the ON and OFF p osi­
tions.
9.
IF PAS SBAND TUNING A D J U STMENT
Tune the receiver to J 4 . 2 M H z in the USB m o d e
an d s e t t h e con trol t o t h e 1 2 o 'clock
WI DTH
p osition. S e t the R F GAIN con trol fully clock­
wise.
Change the M O D E switch from U S B to LSB . The
receiver background noise a t the speaker should
n o t change in pitch.
I f
adjust VR2 3 0 1 l ocated adj acent t o the M O D E
switch b e l o w t h e chassis until the n oise is of t h e
same p i tch w h e n switching b etween USB a n d
L S B .
Q 7 0 1
X 7 o 3
X 7 D 2
X r n 1
V R , 0 2
Q7os
Q707
Q705
Q705
A)
�
ODE switch
con trol coun ter­
I
kHz audio signal
there is any di fference ,
T 2 0 7
Q207
N B /P R O C u n i t
VRs, b
R ej e c t /W i d t h b o a r d
1 0. APF SELECTIVITY
The selectivity of the APF (Audio Peak Fil ter)
can be adj usted by varying V R 5 0 1 , located on
7 0 SI A .
P B- l Clockwise rotation of V R 5 0 1 will yield
sharper selectivity of the filter.
AF
4 6
- -
V R 203 V R 202 V R 2 0 1
( P B - 1 9 94)
Mod e s w i t c h
V R 2 3 0 1
( P B - 1 722)
u i ( P B - 1 7 0 5 A )
n t
X F2 0 1
T z o z
T z o 1
Q203
M e m o r y un i t