Technical data

ASTi DACS: Operation & Maintenance Manual (Version 4, Rev. B.1) www.asti-usa.com

Appendix C: Common Problems

Problems with Waveform Synthesizer Audio I/O

PROBLEM:

One or more channels is dead - no sound is coming out.

SUGGESTION:

Run DRED_LOC by exiting to DOS and typing DRED_LOC. This will play a unique sound out

of each audio output. If sound does come out of each channel now, you probably have a problem

with your model.

If one or more of the output channels is still dead, check your cabling and make sure any powered

speakers or intermediate ampliﬁers are turned on.

If you still get no sound, check the DSP Timing page (above) to see if all the cards are running

properly. If they are, and you still get no sound, the card may need to be replaced.

PROBLEM:

Sound comes out of the outputs, but the inputs don’t seem to be working or have a lot of noise in

them.

SUGGESTION:

Check to see that your preamp gain is turned up if you are using a microphone. The preamp gain

for each channel can be viewed in the “Gains” menu, which is in the “Waveform DSPs” menu. A

typical microphone will require a gain of about 40. Use the ‘+’ and ‘-’ keys to adjust the gain.

To have the gain set at start-up, read the section of the Model Builder Reference manual titled

“System Conﬁguration”.

PROBLEM:

Audio input from a piece of audio equipment (such as a CD player) to the DACS sounds very bad.

SUGGESTION:

Check to see that the preamp gain is set to 1. All line level sound into the DACS should not be

ampliﬁed, or else clipping of the signal will occur.

Problems with Host Interface

PROBLEM:

Host computer and DACS are not communicating.

SUGGESTIONS:

Several things could be happening. Go to the Ethernet Status Window.

IF:

RX Good Count is incrementing and RX Errors is not incrementing.