Dataradio Gemini PD Manual de servicio - Página 7

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2.1.1 LED Indicators

The Gemini/PD has two LED indicators:
LED's
Indicates
name
PWR
red
red
RX/TX
green
flashing
red/green
2.2

DTE Port Interface

For all three ports:
DE-9 F
Function
pin #
1
DCD – from Gemini/PD, normally
asserted
2
RXD – data from Gemini/PD
3
TXD – data to Gemini/PD
4
DTR – to Gemini/PD, handshaking
5
Ground
6
DSR – from Gemini/PD, tied to
VCC through current limiting resis-
tor
7
RTS - to Gemini/PD, handshaking
8
CTS – from Gemini/PD, hand-
shaking
9
AUX auxiliary input to Gemini/PD,
"panic line" input (port 3):
It may be activated by dry contact
pull-up to the port's DSR output. It
may also tolerate user pull-up to
external +12 VDC (car battery), but
an isolated dry contact is preferred
due to the risk of noise related false
alarms caused by the vehicle's
electrical system.
120 20110-003 PRELIMINARY
Description
DC Power is applied
Unit transmit
Unit receive
Radio is unlocked
We recommend the use of a shielded 9-wire
cable with all pins connected. These ports
can be used for unit configuration, mainte-
nance & adjustment as well to connect user
applications.
2.2.1 RS-232 Interface Signal
Levels
In the descriptions of data signals, the fol-
lowing conventions are used:
Table 1 - RS-232 Signal Levels
Term
Alternates
ON
asserted, spacing
OFF
dropped, marking
Gemini/PD Technical Manual
3
Signal level
+3 to +15 V
-3 to -15 V