CTI Products OTAL On-the-Air Driver Assembly - Manual (Page 8)

CTI Products, Inc. OTAL Driver Assembly User Guide
OTAL D
RIVER
L
OGIC
The OTAL Driver Assembly features two types of OTAL logic, depending on jumper settings selected:
• COR + PTT OTAL Logic
(Enabled with E4 & E10 jumpers OUT)
• COR Only OTAL Logic
(Enabled with E4 & E10 jumpers IN)
COR AND PTT OTAL D RIVER L OGIC
Output Logic
OTAL Out = (Local PTT OR Remote PTT) AND COR
Keyup Fail Output Logic
The Keyup Fail signal is derived from the PTT signals and the COR signals. If a PTT is active and there is no
COR within a fixed time (typically 1 second), the Keyup Fail will become active. The time delay allows for
tone keying, keyup delay, and COR delay. The Keyup Fail feeds the Status CIB and can be indicated on the
MCN PC.
Keyup Fail Alarm = (Local PTT OR Remote PTT) AND NOT COR
COR O NLY OTAL D RIVER L OGIC
The COR Only logic is as follows:
OTAL Output = COR
Keyup Alarm = not applicable (PTT signals are not used in the OTAL logic)
OTAL Logic 8