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Table 1. DTE Connector J4
fable
4. DTE
CMOS Level Connector
Jj
2
3
4
5
6
7
8
DTEDCD
DTERXD
DTETXD
DTEDTR
DTEGND
DTEDSR
DTERTS
DTECTS
Output
Input
Output
Transmit Data
Receive Data
ata Terminal Ready
Signal Ground
Data Set Ready
Request-To-Send
Clear-To-Send
!1 ! 1 !
.
II I
I I I I !
I ' I !
l i
l~ ! 1
1 1 1 1 I
j ! I I I ! 1 1 ! ! !
1 1
1 1 1
1 ! 1 1
.1!
:
! l ! l
:
j : : ! · l
. !
! l : i ! :
: ! :
~
· :
· :
:
! ! l
: l j :
1
DTERTSC
2
DTECTS C
3
CMOS
GROUND
4
DTEDTRC
5
DTERXDC
6
DTETXDC
7
DTEDSRC
8
CMOS
GROUND
Input
Output
Ground
Input
Output
Input
Output
Ground
Request-
To-Se~
Clear-To-Sene
I
Signal
Grounc
I
I
Data Terminal
Rf
I
Transmit Date
I
Recei ve Data
Data Set Read
Signal
Grouru
I
9
DTERI
Output
Ring Indicator
2.1.4
Radio aDd Power Copnections
Table 2. Direction of DTE Interface Signal Lines
Table 5. Radio and Power Connector J2
1
Input/output
SB9600
reset
I
2
Input/output
SB9600
busy:
3
Input/output
SB9600 data sig
4
BUS-
Input/output
SB9600 data
sig
5
DMR
Output
Data Mode
Reqt
6
DPlT
Output
Data Push-
re-r
I
7
DISC
Input
Discriminatoj
8
MOD
Output
Modulator
9
RSSI
Input
Receive Signal
Str
Indicator
I
10
DMW
Input
Data Message
~
11
DMG
Input
Data Mode Gr
i
I
12
POWER
Power
External
Powl
(13.8±20% V
1
I
13
PGND
Power Ground
External Grou
I
I
2.2
R8-232 INTERFACE
I
I
The RS-232 signals incoming from the DTE and a
interface are associated with transmission and
cc
into CMOS levels.
I
Conversion in both directions takes place in U8,
U
U19. U8 and U19 are single-supply (5 V) RS-232
1
U8 drives V18 and gives it the RS-232 voltage leve
I
I
I
I
I
I
68PO~
I
I
I
Receive Data
Signal Ground
Transmit Data
Clear-To-Send
Data Set Ready
Posi tive (battery)
Request-To-Send
Negative (battery)
Data Terminal Ready
Input
Input
Input
Output
Output
Output
9-16 V
Ground
Ground
NVBAT
AUX CTS
AUX RTS
PYBAT
AUX DSR
AUXDTR
AUXTXD
AUXRXD
AUXGND
Table 3. RS-232 Auxiliary Connector J5
2
3
8
4
5
6
9
7
1
DCD
2
RXD
X
3
TXD
X
4
DTR
X
5
GND
6
DSR
X
7
RTS
X
8
CTS
X
9
RI
X
2.1.2 RS-232 Auxiliary Siana1s and COQnections
4
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