Power Up; Sidetone Adjustment - Telex Audiocom WM1000 User Instructions

Power Up

Make sure any local power supplies are plugged in, and turn ON the power switches
of any phantom power supplies.
NOTE: If you are using a large number of locally powered intercom stations (10
or more), you should activate their local power supplies before
activating any phantom power supply. Otherwise, you may get an
overload indication on the phantom supply. In this case, either reset the
phantom supply, or momentarily turn it OFF, then ON.

Sidetone Adjustment

The WM1000/2000 uses full-duplex audio (the same as conventional telephone lines)
in which the talk and listen audio are sent and received on the same wires. When you
talk on a channel, you also hear your own voice back in the headphones. If you are
using open-ear style headphones, this could cause unwanted feedback, since the
microphone may pick up your returned voice audio and re-amplify it.
On the other hand, if you are using headphones that completely enclose the ears, a
certain amount of your own voice level is desirable to overcome the muffled sensation
when talking. The sidetone adjustment is different for these two situations.
To adjust the sidetone, do the following:
Activate channel 1.
1.
NOTE: Required only for the WM2000, the WM1000 is active on
Activate talk and listen.
2.
Slowly increase the volume to maximum while talking into the microphone.
3.
Using a small, flathead screwdriver, adjust the channel 1 sidetone trimmer
4.
(Figure 1 on page 2) to minimize you voice level in the headphones
For the WM2000 only, activate channel 2 and repeat 2 through 4 to adjust
5.
channel 2 sidetone.
Install the intercom station mounting screws after completing the
6.
adjustments.
The station is now ready for use.
whichever channel it is connected to).
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