Dataradio Gemini/PD+, Installation Manual

Page: 18 / 26

120 20120-211 Gemini
PD+
Installation Guide 12
Table 1 - Gemini
PD+
LEDs indications
Gemini
PD+
LEDs indications
Power-on Sequence (LEDs are paired) Normal Operation (LEDs are independent)
PWR RX / TX Indication PWR Indication RX / TX Indication
Red Red
Normal boot-up
start
(10 to 27 sec.)
Green* Normal ready state Off No network activity
Amber Off
Then 8 seconds
to completing
boot-up
Normal
Green Off Normal state
Amber*
1 Pulse per sec (1 pps)
Sufficient satellites
acquired by GPS
Green
Receiving packets
“DBA sync” allows transmit
Red Off Hardware failure
flashing
Red
-
Missing DSP
RSSI calibration
Amber
Receiving packets
“DBA out-of-sync” prevents
transmit
Errors
Slow
Red/Green
Red
Software failure
(firmware erased)
Red Transmitting
Special
Fast
Red/Green
Red
Programming in
progress
* For 800 & 900 MHz US models (using Transmit duty cycle limit firmware) :
- PWR lit Green = normal indication or Flashing Amber = 1pps
- PWR lit Amber = exceeded duty-cycle or Flashing Green = exceeded d-c + 1pps
3.2 DTE Port Interface
For all three ports, we recommend the use of a shielded 9-wire cable with all pins connected. These ports
can be used for unit configuration, maintenance, & adjustment as well to connect user applications.
Table 2 - DTE port pin functions
DE-9 F pin # Function
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 resistor
7 RTS - to Gemini
PD+
, handshaking
8 CTS – from Gemini
PD+
, handshaking
9 AUX - auxiliary input to Gemini
PD+
, (for port 2:
“Officer requires assistance”
Alarm input)
It may be activated by (normally open) dry contact pull-up to the port’s DSR output. It may also tolerate
user pull-up to ex12 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.
A +3 to +12 V signal at this pin will send a DMP
“x” (On) message to the base.
An open or ground signal will send a DMP “y” (Off) message.
Messages are only sent when a signal transition occurs.
See Appendix “A” on page 24 for further details.
3.2.1 RS-232 Interface Signal Levels
In the descriptions of data signals, the following conventions are used:
Table 3 - RS-232 Signal Levels
Term
Alternates
Signal level
ON asserted, spacing +3 to +15 V
OFF
dropped, marking
-3 to -15 V