Kenwood TS-5700 Service Manual page 24

TS-570 0
Address (HEX) Bit (HEX)
C + 1 E
0 - 7
C + 1 F
0
1
C + 2 0
0 - 3
C + 2 1
0 - E
C + 2 2
0 - E
C + 2 3
0 - F
C + 2 4
0 - 2
C + 2 5
0 - F
C + 2 6
0 - E
C + 2 7
0 - E
C + 2 8
0 - E
C + 2 9
C + 2 A
C + 2 B
C + 2 C
C + 2 D
C + 2 E
C + 2 F
•
Ot her Ci rcuits in the Analog U n it
Several circuits in the analog unit have already been
described in the section of the flow of transmit/re­
ceive signals. This section explains the other circuits .
1) Reference vo ltage ci rcuit
Since the TS-570 0 does not have any negative
power supply, it uses a 2.5V reference voltage, which
is half the 5V power supply voltage, for operational
amplifiers, to process analog signals linearly. The ref­
erence voltage circuit is shown below . 2.5V is pro­
duced by dividing the power supply voltage with R539
and R540. The voltage is supplied to the circuitry
through a buffer amplifier I C506 : N JM2 1 00M.
2) Pop soun d m ute ci rcuit
The mute circuit shown below reduces the pop
sound when the power switches off. If pin 23 (AMU)
of C N3 is low, the mute circuit consisting of 0 1 1 , 0 1 2:
DTC143EK mutes the AF amplifier ( I C8: LA4446) and
suppresses the pop sound when the power turns on .
26
CI RCU IT D ES CR I PTI O N
DSP-MCU
Accept
--7
U pdated at P R O C c o m p r e s s i o n l e v e l
fs i n te rva l s 0 • Od B - S 7 F F F • 30d B
--7
U pdated at Stat u s voxs
fs i n t e rva l s
CTCSS
f--
I R 02 Adj u s t m e n t m o d e
0 • Tone o u t p u t , T h e ot h e r
f--
Everyt i m e Test t o n e freq u e n cy 1
0 • O F F , 1
f--
Everyt i m e Test t o n e fre q u e n cy 1
0 • O F F , 1 • f = n x 1 2 0 0 + 2 A 1 6 ( O H z - 6 k H z)
--7
Everyt i m e CW b e a t tra c k i n g
1 6 b i t s w i t h a s i g n • f
f--
I R 02 RX voice e q u a l izer
RX voice e q u a l izi n g O N/O F F a n d s e l ection
f--
Everyt i m e R F g a i n VO L
0 �d B - 2 5 5
--7
U pdated at
CW beat trac k i n g f re q u e n cy
f s i n t e rva l s 1 6 b i t s w i t h a s i g n • f
f--
Everyt i m e L i n e e n h a n c e r tra c k i n g s p e e d
0 • Defa u lt, 1
f--
Everyt i m e B e a t c a n ce l e r tra c k i n g s p e e d
•
0 Defa u lt, 1 • S l ow - S 7 F F F
R e s e rve
R e s e rve
R e s e rve
R e s e rve
R e s e rve
R e s e rve
R e s e rve
Fu ncti o n ( Para meter)
• s e m i l o g
o .
O F F , 1 • O N
•
1 D e t .
• To n e stop
· =
f n x 1 2 00 + 2 A 1 6 ( 0 H z - 6 k Hz)
•
E r ro r freq u e n cy
=
± n x 3000 + 2 A 1 5
•
O d B • F u n e
=
n x 1 2 000 + 2 A 1 6
•
S l ow - S 7 F F F •
Fast
•
Fast
5A
(J')
M
"'
a:
0
...
"'
a:
Fi g. 2 1 Reference vo ltag e ci rcuit
D 1 0
...
0:
Fi g . 22
: 5V
B U F F
IC506: N J M 2 1 00M
N
...
Pop soun d m ute ci rcuit
PSC