Mitel GPS Orion-S/-HD Receiver 사용자 설명서

Document Title: 

 

7 

User’s  Manual for the GPS Orion-S/-HD Receiver 

Document No. 

 

Issue 1.0 

GTN-MAN-0110 

 

June 22, 2003 



 DLR/GSOCNo part of this document shall be reproduced in any form or disclosed to third parties without prior authorization. 

The interface board provides auxiliary devices that are required for standalone operation of 
the Orion receivers. It comprises  

• 

a switching regulator allowing operation from unregulated power supplies, 

• 

a rechargeable battery to maintain the non-volatile memory and real-time clock during 
power down times and 

• 

two RS232 serial line drivers for communication with standard peripheral devices.  

Key parameters of the interface board are summarized in Table 2.2.  

Table 2.2 Physical and electrical parameters of GPS Orion interface board 

Dimension 

95mm x 50mm x 20mm 

Weight 

70g 

Operating voltage 

8–30V 

Efficiency of switching regulator 

85% 

Total power consumption (I/F and main board)  2.4 W 
Battery 

+3.6V NiCad, 110 mAh ([1]) 

I/O ports  

2 x RS232 (±10V) 
Sub-D9 connector (male) 

 
The two serial ports support the ground, receive and transmit line using the standard pin as-
signment for Sub-D9 connectors (Table 2.2).  Pins 7 and 8  are cross-connected since the 
Orion receiver does not support a hardware handshake. Likewise the three pins 1, 4, and 6 
are connected among each other.  

Table 2.2 Pin assignment for RS232 Sub-D9 connectors (Port A and B) 

1 

DCD  (Data Channel Received 
Line Signal Dete ctor) 

Connected with DTR and DSR (pins 4 , 6) 

2 

RxD (Receive Data) 

 

3 

TxD (Transmit Data) 

 

4 

DTR (Data Terminal Ready)  

Connected with DCD and DSR (pins 1 , 6) 

5 

GND (Signal Ground) 

 

6 

DSR (Data Set Ready) 

Connected with DCD and DTR (pins 1 , 4) 

7 

RTS (Request to Send ) 

Connected with CTS (pin 8) 

8 

CTS (Clear to Send) 

Connected with RTS (pin 7) 

9 

RI (Ring Indicator) 

Not connected 

 

 

The GPS Orion receiver is operated with an active antenna (or a passive antenna and exter-
nal preamplifier) having a minimum gain of 16 dB and a noise-figure of less than 4 dB  More 
specifically, the ANPC-131 antenna of M/A COM is recommended (cf. [4]), for terrestrial ap-
plications. It offers an LNA gain of +26 dB and a 1.5 dB noise-figure at the L1 frequency 
(1575.42 MHz).  

For space applications dedicated antenna designs with heat and vacuum resistant radomes 
are generally required. For sounding rockets wrap around antennas, helix tip antennas or 
blade antennas with separate preamplifiers are available on request. GPS antennas for 
satellite applications are offered by e.g. Sensor Systems Inc.