Internal connections, Ptt iib to otal driver pcb, Otal – CTI Products OTAL On-the-Air Driver Assembly User Manual
Page 13: River, Nternal, Onnections
CTI Products, Inc.
OTAL Driver Assembly User Guide
I
NTERNAL
C
ONNECTIONS
PTT
IIB
TO
OTAL
D
RIVER
PCB
The PTT IIB is connected to J2 on the OTAL Driver board through a ribbon cable as follows:
PTT IIB J1
IIB I/O
IIB Function
OTAL Driver PCB
Connector J2
OTAL System
Function
1
Gnd Ground
1
Ground
4
I
Link Fail Enable
7
Ground
29
I
Link Fail Invert
8
Ground
30
O
Fail 8 / Link Fail
10
LinkUp1
19
O
Rx 1
37
PTT 1B
44
O
Rx 2
38
PTT 2B
12
O
Rx 3
23
PTT 3B
37
O
Rx 4
24
PTT 4B
6
O
Rx 5
11
PTT 5B
31
O
Rx 6
12
PTT 6B
18
O
Rx 7
35
PTT 7B
26
O
Rx 8
2
PTT 8B
All signals are active low.
The Link Fail Enable and Link Fail Invert signals are inputs to the IIB. They are read-only at power-up of the
IIB. Therefore, the IIB must be connected to the OTAL Driver PCB before it is powered up. Otherwise, the
Link UP signal will not be active.
Internal
Connections
13