GE TransNET 900 Reference Manual page 86

CAUTION
POTENTIAL
EQUIPMENT
DAMAGE
Figure 26. User Interface I/O Jumper Eyelets
NOTE: If your PCB does not look like the one in the
Technical Services for assistance.
Each pin connected to user-designed equipment must be connected through a
special cable constructed to breakout the User I/O pins.
Your interface can complement your unique requirements. The input signals
and output interface must be within the radio's interface parameters as
summarized in Table
Table 29. TransNET User I/O Connection Resources
Function or Service
Filtered Receive Audio
(For test purposes)
General Purpose I/O 1 (GPIO 1)
General Purpose I/O 2 (GPIO 2)
c
Analog 1
Do not connect. Factory use only.
74 MDS TransNET Ref. Manual
Care should be taken when soldering to the PCB eyelets due to
their small size. For this reason, only qualified personnel should
install the jumpers and external connections.
Installation of internal jumpers and connection to non-standard
interface pins may void the product's warranty.
If you are uncertain of your interface design, please consult with
the factory Technical Services Department for a review of your
design to assure maintenance of your warranty.
Invisible place holder
PCBs 03-4040A03/A04 and later
29.
Range
0 – 5 Vac, 30–5 kHz
TTL; External 10K to 3.3 V
a
Vcc Recommended
TTL; External 10K to 3.3 V
b
Vcc Recommended
0 – 5 Vac,  60 HZ
Figure 26, consult with the factory
Available
at eyelet:
H2
H3
H4
H6
H5
MDS 05-2708A01, Rev. F