the amount of sidetone. On the other hand, if you are using headphones that com-
pletely enclose the ears, a certain amount of your own voice level is desirable to
overcome the muffled sensation when talking.
If you are using a speaker and microphone, or open-ear style headphones, ad-
just sidetone as follows:
1.
Simultaneously press the All Talk and PA keys to activate the test tone.
2.
Tap the channel 1 Call key to send the test tone on channel 1.
3.
Increase the volume until you can hear the test tone. (If you are using a headset,
adjust the volume control at the US2000A. If you are using a speaker, adjust the
volume control at the speaker).
4.
Using a small flat-bladed screwdriver, adjust the channel 1 sidetone through the
access hole in the bottom of the US2000A (Figure
ume.
5.
Tap the channel 1 Call key to turn off the test tone on channel 1 when finished.
6.
Tap the channel 2 Call key, and repeat the adjustment for the channel 2 sidetone.
7.
Tap any other key, except a Call key, to turn off the test tone when finished.
If you are using headphones that completely enclose the ears, adjust sidetone as
follows:
1.
Tap the Headset key to turn the headset microphone on.
2.
Tap the channel 1 Talk key to turn it on.
3.
While speaking into the microphone, use a small flat-bladed screwdriver to ad-
just the channel 1 sidetone so that you hear your voice at an acceptable level in
the headphones. Tap the channel 1 Talk key to turn it off when finished.
4.
Tap the channel 2 Talk key to turn it on, and adjust the channel 2 sidetone as for
channel 1. Tap the channel 2 Talk key to turn it off when finished.
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