BIRD ACM500I M Series, Operation Manual

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ACMI Operation Manual
7
Push-to-Talk
The low power alarm and the VSWR alarm can falsely trigger when the
transmitter is not keyed. The Push-to-Talk feature disables alarm checking for a
predetermined period after the Push-to-Talk logic line is asserted. In order to
prevent false alarms while monitoring for low power and high VSWR, the Push-
to-Talk feature must be enabled.