User's Manual

FreeWave Technologies
October 22, 2013
900 MHz Spread Spectrum Installation Manual
V5.3
LIG0003AC Rev D 11 of 11
in antenna placement (as little as 2 feet) will solve noise problems. In extreme cases, such as
when the transceiver is located close to Pager or Cellular Telephone transmission towers,
FreeWave offers a band pass filter to reduce the out of band noise.
C. Board Level Pin Assignments
The board level transceiver uses standard RS232 polarity and voltage levels for all of the RS232
signal lines (DTR, Transmit Data, Receive Data, Carrier Detect, RTS, and Clear to Send).
Pin 1: B+ Power input.
Pin 2: Interrupt (INT) – Input – A 0 volt level on this pin will switch the radio into setup mode.
Note: Pin 1 on the DGRO9 board level transceiver is the pin farthest from the three
LEDs and pin 10 is closest to the LEDs.
D. Power Connection
The DGR and FGR series transceivers can be operated from any Class 2 power source, input
voltages vary by model. The power source should be capable of providing at least 0.8 amperes
of continuous current. The pin #1 of the 10-pin connector on the transceiver is the positive lead;
pin #4 or pin #6 of this connector should be as a negative lead.
Transceiver is designed to operate in negative ground systems only.
Table 4: Board Level
Transceiver Pinout
Pin
Signal
Assignment
1
Input
B+ input
2
Input
Interrupt (Ground to invoke menu)
3
Input
DTR
4
Ground
5
Output
Transmit Data
6
Ground
7
Input
Receive Data
8
Output
Carrier Detect
9
Input
RTS
10
Output
Clear to Send