The NHRC-Squelch is a microprocessor-controlled carrier-activated switch on a single circuit board. It is intended for use in repeater systems, to provide a source of the CAS signal independent of the radio's squelch circuitry. The NHRC-Squelch requires discriminator audio as its only input, and continuously evaluates the amount of noise that is present. Extremely quiet signals are subject to instant squelch action, noisier signals increase the amount of hysteresis in the squelch action, resulting in progressivly longer delays as signal quality degrades. This allows the repeater to properly "follow" weak mobiles as they fade from "mobile flutter."

(Not quite actual size, it's approximately 3.0" x 1.5")

• Continuous evaluation of received noise adjusts squelch hysteresis.
• Jumper selectable CAS polarity.
• Four delay levels based on signal quieting.
  Jumper selectable longer squelch delay for VHF low bands.
• Simple interface to repeater and controller.
• Simple setup uses status LEDs, no test equipment needed!

• NHRC-Squelch User's Guide

NHRC-Squelch	Intelligent CAS	$69.00
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