Frequently Asked Questions - Hamilton Air 5000 Series Installation & Service Manual

Audio/video system
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Frequently Asked Questions

Q. How do I get technical support on these audio/video products?
A. Contact tech support at 877-236-0245 or 513-988-9524. Office hours are Monday through Friday,
8AM to 5PM Eastern time, excluding holidays.
Audio
Q. Why is there sometimes a "gurgling" sound in the incoming audio of a 5000 Series audio console?
A. This is the left over effect of background noise cancellation when the background noise is constantly
changing and the processor cannot keep up with the changes. See the section "Echo Canceller &
Background Noise Cancellation" for more information.
Q. I just added a new 5501 Series audio console to an existing system and the outgoing volume is
considerably louder than the other consoles. What can I do about this?
A. 5501 Series consoles with 1.1 or 2.# firmware have much higher outgoing volume than 5501
consoles with 1.0 firmware or older series consoles. If new consoles are mixed on the same system
with older consoles the outgoing volume must be matched by adjusting the mic gain pots. See the
section "5501 Series Audio Console Firmware" for adjustment procedures.
Q. I just replaced all the older consoles on a system with new 5501 consoles and now I get occassional
static and the customer's voice sometimes cuts out. Why is this happening?
A. Quite likely the matrix gains are set too high, the tellers are too close to the microphone, the cabling
from the matrix to the lanes has improper shielding for the mic pair, or a combination of these items.
5501 Series consoles with 1.1 or 2.# firmware have much higher outgoing volume than 5501
consoles with 1.0 firmware or older series consoles and thus have different requirements. The
possible causes listed all can overwhelm the echo canceller in the audio processor and cause the
static and cutting out issues. See the sections "Cable Considerations", "Adjusting the Audio System"
and "Echo Canceller & Background Noise Cancellation" for more information.
Q. When a lane is selected using a 5001 Series audio console, why are the first few words from the
customer sometimes hard to understand?
A. The echo canceller feature in 5001 Series consoles can have dynamic or fixed learning. Dynamic
learning will do the best job of echo cancellation but can occasionally cause the first few words to
sound robotic while "learning" is taking place. See the section "Echo Canceller & Background Noise
Cancellation" for more information. The echo canceller must be set for dynamic learning with 5501
Series consoles.
Q. The teller can hear their own voice through the console speaker when certain lanes are selected. Also
there is sometimes feedback. What can be done to prevent this?
A. Any console that operates in full duplex can exhibit these problems if the customer speaker and
microphone are too close together and the volume levels are too loud. Sound bouncing off the
customer vehicle contributes to this. 5000 Series consoles have an echo canceller feature which
reduces the effect of this condition. See the section "Echo Canceller & Background Noise
Cancellation" for more information about this feature. It is also possible that the wrong type of
cabling was used from the matrix to the lane which causes coupling between the speaker and
microphone wires in the cable. See the section "Cable Considerations" for more information.
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08-315 (3/6/12)

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