Timers

Timers on the VHF system are set as follows:

• Hang time: 3 s  
• time repeater carrier stays up after a user unkeys

• Courtesy tone delay:  250 ms
• time between when user unkeys and courtesy tone sounds

• Repeater time out:  180 s (3 min)

• Kerchunk timer: 150 ms 
• filters out many kerchunkers and lots of key-ups from interference


• ID timer: 540 s (9 min) 

(Updated) Note:  When a signal is sent to the repeater via the Stadium link, there is an extra delay.  Ordinarily there is:

• a delay from the time the operator pushes the PTT until the time the transmitter in the radio starts transmitting;
  
  
• a 150-ms delay to eliminate kerchunkers and stray keyups;
  
  
• a delay from the time that the receiver "sees" the CTCSS tone and activates the repeater transmitter;
  
  
• a delay while the repeater transmitter begins transmitting. 

When transmitting via the Stadium link, there is an additional (unquantified) delay while the receiver there sees the CTCSS tone and activates its transmitter.