General Dynamics DIGITAL TRACKING RECEIVER - Beacon Select Inputs (GPIO 0-3)

Installation
CG-1220 DT
R
3-5
the highlight from the fault display on the DTR LCD and restoring the Summary Fault
contact to the normal (no-fault) state, which is CLOSED. However it may not clear
the fault condition. If any new faults occur after the Summary fault relay was
forced to close by using ACKNOWLEDGE FAULTS, the Summary Fault relay will
open again to indicate a new fault condition.
The following listing of faults that can cause a Summary Fault in the DTR (also listed
in Appendix C under the 5.1 Keyword Commands, LIST-FAULTS keyword
description):
 Low Input Signal
 Input Saturated
 MCU Link loss
 DSP Link loss
 DSP Data loss
 SPU Overflow
 TBT Link loss
 TBT Summary Fault
 TBT in Local Ctrl
 Out of Band
 Invalid Band Setup
 Band 1 BDC fault
 Band 2 BDC fault
 Band 3 BDC fault
 Band 4 BDC fault
 PLL1 Unlocked
 PLL2 Unlocked
 Temperature alarm
 NVRAM corrupted
 Mute Switch Fault
 SPU Link locked
3.3.1.1.3 Beacon Select Inputs (GPIO 0-3)
The BEACON SELECT inputs (not available on Monopulse units) are formed through
pin groups (5,18), (6,19), (7,20) and (8,21)—internal drive common ground, short
GPIO + to – to turn off optically coupled isolator. GPIO 0-3 are inputs that switch
the DTR to a pre-set BEACON (set of parameters). The main purpose is to provide
a discrete, parallel control interface that is compatible with existing 7134 (and
7200) controllers. Selecting one of the 4 BEACON inputs, while the DTR is in
REMOTE CONTROL (not Local) and the REMOTE CONTROL PORT parameter is set
to I/O Interface #1, will enable the DTR to switch to the pre-set BEACON
parameters.
To setup the beacons, the appropriate DTR parameters should be set, and the
STORE BEACON command executed. (Refer to Section 3.5.2 for further
information about setting up beacons.) This action will store the BEACON
parameters into NVRAM, which may then be recalled from the CONFIGS/BEACON-