Company Confidential
44
Raveon Technologies Corp.
11. Internal Radio Connection
Internal to the
FireLine
, the modem circuit board interfaces to a radio transceiver
module via a 14 pin single in-line connector. The following table describes the
function of each pin.
Pin #
Function
1
System ground
2
+7.5V regulated output,
±
5%. 1.5amp maximum current source.
3
+7.5V transmit,
±
5%. 100mA maximum current source.
4
RX ON. +5.0V in RX mode 0V TX mode. 10mA maximum current
source.
5
Radio ON. +5.0V DC to radio. Digital output. 10mA maximum
current source.
6
Transmit modulation. 2.5V DC RX, 2.5V DC with 2V p-p Gaussian
filtered 9600bps data during transmit.
7
Synthesizer lock detect input. Low=unlocked. High = locked.
8
PLL enable signal. Latch enable signal for serial interface to PLL.
9
PLL data signal. Data to PLL chip via three wire interface, pins 8,9,
and 10.
10
PLL clock for three wire interface.
11
No connect
12
RSSI input from radio. Optional input signal.
13
Receiver discriminator input from radio. On-board AGC for signals
with amplitude of .1V-2Vp-p and a DC bias of 1V-2.5V.
14
Modulation balance output. Adjustable DC voltage, set with the
ATR9 command.
