Own Products: DMA80
The DMA80 is a system that combines top quality microphone amplifiers and A/D converters with advanced gain optimization facilities plus a robust digital transmission link that maintains maximal signal integrity at all times.
The main display on the controller shows clock status (internal or external), sample rate selected and whether phantom power is present for each channel. These settings are adjusted via 4 push button keys. The controller handles 8 microphones via 4 pods, each pod handling two microphone inputs and one digital output. AES data received by the controller is re-clocked prior to re-transmission. No power connection is needed for the pods as this is provided down the link cable. This enables the pod to be placed as freely as any normal analogue stage box. Four pods alligned horizontally will fit exactly into a 2U 19" rack space.
Microphones are controlled via elliptical control clusters, set out in pairs to correspond to each microphone pod. The green displays show selected analogue gain. Two gain ranges are available, low and high, spanning respectively 0 to 30dB and 25 to 65dB. Gain adjustments are in 1dB steps, smooth and virtually silent. Adjustments are made independently for each microphone via push button toggle switches. Channels can also be ganged such that global gain changes can be made. The red displays show peak levels held since last peak reset and thus available headroom. The display range is from 0 to 63dB. Clipping from 0 to +5dB is displayed in 1dB steps.
The remaining LEDs indicate the condition of the link: OK confirms that the phase locked loop in the AES receiver is locked. CONF indicates that the link is of compromised quality due to the received date eye opening being less than half a bit period. SLIP warns that the incoming data is asynchronous with the selected clock. Samples will in this instance be slipped or repeated causing low level clicks in the audio. FAIL indicates that the connected pod is faulty or badly connected.
The system is designed to be used with standard analogue XLR cables and will work without problem with lengths of up to 100-150m at 48kHz. If 110ohm cable is used, lengths of up to 300m can be used. The sample frequency used does affect cable length limits - the higher the frequency, the shorter the maximum cable length.
Download the DMA80 brochure for further product details and specifications:Downloads:
DMA 80 Brochure (129kB)