Q: How do I delay the PTT on a port after a power cycle?

After a power failure, some radios require that the PTT not be asserted for some amount of time.  You might need this if you have a tube power amplifier that needs to warm up, a Yaesu DR-1X that might lock up, or a Kenwood TKR-x50 Version 1 that switches modes.

This example uses a User Timer (see page 20-1) that is started by the Power-Up Macro (see page 5-28).  Macros disable the transmitter PTT (see page 11-26), then reenable it after the delay time.

; Powerup Macro PTT Delay
;   Prevent PTT for 30 seconds after an initial powerup.

99 26 0000 A000 *   ; Set the Power ON-Triggered Macro to restart on a power failure

; setup a delay timer
99 49 00 03 300 *   ; Set timer 00 to 30.0 seconds
99 49 00 02 A001 *  ; Set macro A001 to execute when the timer times out

; Powerup Macro
99 20 A000 99 63 0112 0 * ; Disable PTT #1
99 29 A000 99 49 00 04 *  ; Start the Timer in One-Shot mode (fixed length)

; Delayed Powerup Macro
99 20 A001 99 63 0112 1 * ; Enable PTT #1
 

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