Yaesu MEMORIZER FT-227R Instruction Manual page 28

( 3 ) S Mete r S e n s itivity
a ) Apply the s i gnal g ene r ator output to th e ante nna c o nne cto r .
Tl 0 2 fo r maximum S mete r r e ading .
b ) S e t the output l e vel o f the s i gnal g en e r a to r to 2 0d B and adj u s t
VRl Ol fo r full s c ale indi cation on foe S m e te r .
( 4 ) N o i s e Squ e l ch T h r e s hold
a) Re c e ive 0 d B s i g nal from the s i gnal g ene r ato r .
b ) S e t the SQL c o nt r ol on the front panel to T ON E po s iti on and s li ght ­
ly advan c e clo c kwi s e di r e c tion to minimum S Q L po s iti on .
VR1 0 2 t o the point whe r e the s qu e l c h s ta r t s t o o p en.
PLL C i r cuit
a) S et the channel fr e qu e n c y to 14 6 . 00 MHz .
b ) C o nne c t the Y C 5 0 0 S f r e quency counte r t o T P 3 o f the P L L unit and
adju s t T C 3 0 9 fo r 5 . 1 2 0 0 MHz, and make s u r e the RF volta g e o f the
emitte r of Q 3 1 2 i s appr oximately 1 . 6 Volts rm s .
c ) C onne c t R F p r ob e o f the V T VM to the b a s e o f Q 3 11 and p e ak T C 3 0 8
fo r maximum V T VM r e a ding . Slowly r o tate T C 3 0 8 in the di r e c tion
of inc r e a s ing c ap a c itanc e until the V TVM r e ading b e c ome s 5 %
l ow e r than p e a k ind i c ati o n ( app r ox . 6 0 mV rm s ) .
d ) C onne c t RF p r ob e o f the V T VM to the b a s e o f Q 3 0 5 .
mitte r and p e ak T 3 0 2 fo r m aximum V T VM r e ading ( ap pr ox . 1 7 0 m V
rm s ) .
e ) C onne ct the Y C - S O OS fr e qu ency c ount e r b e tw e en c a thode o f D 3 0 2
in P L L unit and the g r ound .
Adju s t T C 3 01 fo r 1 3 5 . 3 0 0 MHz c ounte r r e ading .
f) S et the F UN C TION switch to - 6 0 0 .
T C 3 0 2 fo r 1 3 4 . 7 0 0 M Hz c ounte r r e ading .
MH z at + 6 0 0 .
g ) S e t the FUN C TION switch to SIMP .
ju s t T C 3 04 fo r 1 3 5 . 3 0 5 MHz in r e c e ive mod e .
at - 6 0 0 and adju s t T C 3 0 5 fo r 1 3 4 . 7 0 5 MHz , at + 6 0 0 kHz adju s t
T C 3 0 6 fo r 1 3 5 . 9 0 5 M Hz .
C onne c t V T VM ( D Cl O V r ang e ) b e tw e en the c a thod e o f D 3 2 4 and g r o und .
h)
A d ju s t T C 3 01 fo r 3 . 4 Volt V TVM r e ading .
i )
C onne c t RF p r o b e o f V T VM betw e e n T X out t e rminal and g r ound i n
P L L unit . P e ak T4 0 2 - T 4 0 8 fo r m aximum V T VM r e ading i n transmi t .
S e t the FU N C TION switch to SIMP .
K e y the t r an s mitte r and adju s t
Adju s t T C 3 0 3 fo r 1 3 5 . 9 0 0
P r e s s 5 U P switch down .
K e y the transmitte r
- 2 6 -
P ea k
S e t
K e y the t r an s ­
Ad ­