Advertisement
RM-1100
RVITC9137P (IC7): EACH TERMINAL
FUNCTION
&
WAVEFORM
1) Terminal view
2) Block Diagram
PSC
AMIN
_ FMIN
GND
Voo
(38
=
TEST
rad
xT
INE
Oyen
PROGRAMMABLE
BI
AM IN
=P
__|OSC
lOkHa
COUNTER
-
B2
PSC
E!
FM
IN
E2
Mute
- BAND
ose
Bes
@O- SELECTOR
gts
ait
CONTROL
DOWN
HI
eas
A-STOP
H2
ST
H3
RAl
=)
Mi
H4
5
M2
H5
e
M3
cl
8
ma
a
=
MEMORY
"
M
4
ss
CHANNEL
&
M6
L
vie
CONTROL
=
CK-!I
0/5
my
LED pRiveR|
|=
CK-2
Date
Voo
GND TEST iNH
Fig. 26
3) Explanation of each terminal
ft
[one fomnstemee
|
} 2.9 per Used to connect a quartz oscillator (7.2 MHz).
Input terminals for FM/AM band switching and
IF fine tuning selection.
Applying the voltages shown below effects band
switching and IF selection.
External CR connection terminal.
Extemally connected C123 (10 V, 2.2 4F) and
R133 (27 kQ) determine the auto-search scan-
ning speed,
automatic
reset
of the
preset
memory storage state, and the shifting time of
manual tuning to fast scanning.
Auto/manual switching input terminal.
Selects manual or auto-search mode
in the
up/down tuning mode.
"L" level
manual mode
B1 (Pin 4) | B2 (Pin 5)
"H" level......auto-search mode
AM (450 kHz)
Sustained pressing of the UP/DOWN tuning key
for a certain time switches from manual mode to
SH
| FM (10.7 MHz)
auto-search mode, and moves the A/M terminal
"H" Level: 5 V
"L" Level: 0 V
from "L" to "H".
Band-mode switching input terminals.
Tuning key input terminals.
:
'
When the voltages shown below are applied to
ey plot voneges sown belrw ewilcnes te
the UP and DOWN
terminals, the reception
frequency is raised or lowered.
E1 (Pin 6) | E2 (Pin 7)
"uy
| H|-For U.S.A. BAND
"H" Level: 5 V
"L" Level: 0 V
[He [ie pion tine ae
"H" level: 5 V, 'L" level:
0 V
Advertisement
