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In video applications, digital audio sample clocks must be locked to a video reference. The VRG-1 provides a means to do so, easily and cost effectively. This module produces word clock and silent AES outputs that are locked to an NTSC or PAL reference input. Use the VRG-1 in conjunction with the SoundPals ADC-24, DMIC- 24, DTG-1 or ADAT-3 modules, or with any other digital audio equipment that requires an AES or word clock reference signal that is locked to video.

Like all of the SoundPals line, the VRG-1 is housed in a compact, rugged aluminum enclosure.

Features include:

• Looping video input accepts NTSC or PAL video, color black, or sync
• Outputs for word clock, silent AES, and silent AES3id
• Internal crystal oscillator provides stable 48kHz reference in the absence of an input signal
• Dipswitch selection of mute outputs or revert to internal reference upon loss of input signal
• Alarm output to warn of loss of input signal

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Specifications:

Video input:	Hi-z looping. Minimum 0.25V p-p sync component, maximum 2V p-p sync or video
Word clock output:	4.5 to 5V p-p
Frequency lock range:	+/- 200 ppm
AES3 output:	4V p-p, 110Ω balanced
AES3id output:	1V p-p, 75Ω unbalanced
Sample rate:	48kHz
Alarm output:	+5V @ 25mA
Power:	150mA @ 6Vdc

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Additional resources:

VRG-1 Datasheet

VRG-1 User Guide

Power Supplies, frames and other options

See also DTG-1