User's Manual

19
©2013 Broadcast Electronics
Figure 3 - Standard D-Sub 37 Connector Numbering
Table 2 – GPIO Pins
Pin
Direction
Name
Description
1
Input
Fault Reset
Resets all the transmitter faults with an active low
edge.
2
Input
Failsafe
Transmitter failsafe input. Requires a sustained low
to run RF in the system.
3
Input
Transmitter On
Turns RF power on with an active low edge.
4
Input
Transmitter Off
Turns RF power off with an active low edge.
5
Input
Mute
Mutes RF while the input is held low. This essentially
performs the function of “Transmitter Off” with a
low edge and “Transmitter On” with a high edge.
6
Input
Raise Transmitter
Power
Raises the system power 1 Watts every second that
this input is held low.
7
Input
Lower Transmitter
Power
Lowers the system power 1 Watts for every second
that this input is held low.
8
Input
Reserved
Reserved
9
Input
Controller Reset
Forces hardware reset on the system controller and
exciter when active. Hold this line low for up to 5
seconds and release to enable RF output once again.
Note: this input is not intended to be used during
normal operation of the system and should only be
used in extreme circumstances.
10
Input
Reserved
Reserved
11
Input
FM Only Mode
Reserved
12
Input
Ground
Isolated ground to be used for remote input
connections.
13
Input
Reserved
Reserved
14
Input
Reserved
Reserved
15
Output
Reflected Power
DC voltage for total reflected power at the system RF
output. Varies linearly from 0V = 0W to 5V = 8
Watts
16
Output
PA Total Current
DC voltage for total RF power supply current for PA
module. Varies linearly from 0 = 0A to 5 V = 6 A.
17
Output
PA Temperature
DC voltage for heat sink temperature reading in PA
module. Varies linearly from 0V = 0 degrees C to 5V
= 100 degrees C.
18
Input
Reserved
Reserved
19
N/A
Ground
Isolated ground intended to be used for safe remote
input logic connections on this interface. Jumper J9
allows this to be wired to a system-wide chassis
ground. Pin 37 provides an alternate place to
connect to this circuitry.
20
Output
General Fault
Low when any fault is active in the system. Can be
setup to be active High.