Honeywell N431X ユーザーズマニュアル

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The beeper transmit order determines when the good read beep occurs.  
The engine can be set to emit the good read beep either before or after 
data transmission.  

Default = Before Transmission.

The beeper pitch codes modify the pitch (frequency) of the sound the 
engine emits when there is a bad read or error.  

Default = Razz.

The beeper duration codes modify the length of the beep the engine emits 
on a good read.  

Default = Normal.