FF-CAD Codec Audio Delay

Description

The FF-CAD is a Codec-based Audio Delay module which has many features which set it above other delay module designs:

The FF-CAD is all digital which provides high fidelity audio reproduction.
Unlike other delay modules which use "bucket-brigade" devices to delay audio, the FF-CAD maintains a constant sample rate for all delay settings.
The FF-CAD is pin compatible with the S-Com audio delay module -- this allows the FF-CAD to "drop-in" to any controller which supports the S-Com unit.
The FF-CAD can perform muting functions independently, which means that it will interface to any repeater controller or other radio interface (DTMF muting requires the FF-CAD DTMF option, listed below).
The delay is set by a binary code which can be adapted for remote control of the delay time.
The FF-CAD is small -- only 2.8" x 4.6".

FF-CAD Specifications
Power requirement	+9.0 to +12 volts @ 50 mA
Digital signals:
MUTE1, Delay Inhibit	0 - 5V
MUTE2	0 - 40V
Analog signals
Audio input level	0 - 3.0 Vrms
Input and Output Coupling	AC
Input impeadance	100 Kohm (50Kohm w/ DTMF option)
Audio Output level	tracks input level
Audio Output impeadance	1Kohm
Output noise floor	69 dbV (0.3 mV)
Intermod Distortion	better than -50 db
Passband response	(200hz-3khz)+/- 0.1 db
Board dimensions	2.8" x 4.6"
Maximum delay (Factory standard)	250 msec
Note: maximum delay may be user modified (via cut jumpers) to either 500ms or 1 second