This is a mature product and no longer offered for sale.
The S-COM Digital Audio Delay Module (DADM) is an enhanced replacement for the original S-COM Audio Delay Module (ADM/K, ADM/U), and competitive audio delay units. It is the same size and shape as the analog original, and offers much better frequency response and signal-to-noise ratio. Additionally, the DADM contains an on-board audio gate which allows it to become a standalone squelch tail eliminator. This means no external gating or controller is needed in simple applications. A COR (carrier-operated relay or switch) connection is needed from the receiver to activate the audio gate.
The DADM is supplied with a 4-pin male header and 4-conductor cable compatible with the S-COM 5K, 6K, and 7K controllers. An additional wire must be attached to the DADM for COR when the DADM is expected to perform audio gating.
|Delay||Dipswitch selectable from 12 to 197 milliseconds in 16 steps of approximately 12 milliseconds each.|
|Audio Levels||Nominal input level, 2 V peak-to-peak (0.7 Vrms)
Maximum input level, 4 V peak-to-peak (1.4 Vrms)
Output level same as input level (gain = 1)
|Input Impedance||Approximately 100K ohms, AC-coupled. Source impedance should be less than 5K ohms.|
|Output Impedance||Approximately 100 ohms. Load impedance should be greater than 5K ohms. The output on pin 2 is DC-coupled with a DC component of 0.45 x Vsupply (compatible with S-COM 5K, 6K, and 7K controllers.) The output on pin 6 is AC-coupled|
|Frequency Response||30 Hz to 5000 Hz +/-1 dB (guaranteed); 30 Hz to 5000 Hz +/-0.5 dB (typical) over the entire delay range.|
|Distortion||Less than 2 percent (-34 dB) THD (guaranteed);
Less than 1 percent (-40 dB) THD (typical).
|Signal-to-Noise Ratio||Greater than 60 dB referenced to a 2V peak-to-peak input signal.|
|Audio Gate||External signal may be connected to pin 5 to control the on-board audio gate. Dipswitch selectable for either high-true or low-true control. (Low level is defined as less than 1 VDC; high level is defined as greater than 3 VDC.)|
|Power Requirements||+9.0 VDC to +12.0 VDC at 25 mA.|
|Dimensions||Only 2.1 by 2.7 inches; tallest component is 0.5 inches above the board. Four mounting holes provided for 6-32 hardware.|