COR, COS, TOR, & TOS

CATAWBA911 · Post by **CATAWBA911** » Sat Dec 01, 2001 7:46 am

WHAT IS THE DIFFERENCE BETWEEN COR, COS, TOR, & TOS...? WHICH WILL I NEED IF I WANT TO USE THIS FOR A RECEIVE INDICATIOR ON A REPEATER TO GET THE TX RADIO TO TX....THIS SETUP IS FOR A SYSTEM THAT HAS A PL ON IT

Monty · Post by **Monty** » Sat Dec 01, 2001 8:55 am

Hi:

In general:

[ COR ] Means Carrier Operated Relay ( Big,
bulky, major power consumer, but reliable.)
Is activated the same way as the COS

[ COS ] mean Carrier Operated Switch. in general a solid State Device such as a Transistor to activate a transmitter circuit
when a Signal is detected at the receiver which has the proper freq and tone.

[ TOS ] Mean Time Out Switch, in genaeral a
circuit that is employed to " Turn Off" the
transmitter after a pre-determined period of time. ( transistorized or IC controlled )

[ TOR / TOT ] Means Time Out Relay ( AKA Time Out Timer ) .....Maybe used to disable High-Power Transmitters that require a Relay due to High-current / voltage circuits.

Also can be known as a Transistorized Operated Relay as in a prefab circuit.

If you desire saftey, at least a COS, and TOT
is required for a good repeater. Many controllers such as a R*IC*K already have these circuits built in.

MS

Will · Post by **Will** » Sat Dec 01, 2001 4:46 pm

TOS also refers to Tone Opereated Switch. ie; PL "Tone" activated switch! It is a receiver function.
To use a Maxtrac/Radius M or GM radio for a repeater receiver it needs to have a way of telling an external device if the receiver is detecting "receiving" a carrier and if it has the proper "PL" tone and or DPL code.

Thus COS+TOS = carrier and proper PL code!
TOS = proper PL code only!
Most of the time you want a valid unsquelch AND a proper PL code detected for proper repeater operation.