Vertex Standard VX-5500U Service Manual page 8

COMP (Compander)
Press the PF button assigned to the "COMP"
function to turn the "Compander" IC ON or OFF.
This IC contains two variable gain circuits con-
figured for compressing and expanding the dy-
namic range of the radio's transmitted audio sig-
nal.
When you enable this function, the signal-to-noise
radio can be improved by reducing the transmit-
ted audio dynamic range.
A O
DVANCED PERATION
Encryption (Option)
When the Voice Scrambler feature is enabled,
pressing the assigned PF button of the "Encryp-
tion" toggles the Scrambler on and off.
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