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National Communications
BALANCE POT ADJUSTMENT
Your DOOR PHONE is preset at the factory for maximum performance. Our
sophisticated circuitry is designed to measure the background noise present
at your site and then apply maximum gain.
In most cases you SHOULD NOT NEED TO MAKE ANY ADJUSTMENTS.
If you are using Two Door Phones, it is possible that you will need to adjust
the POT of one or both Door Phones to suit your specific site conditions.
The balance POT is provided in case you experience one of the following :
•
Audio is distorted.
•
Audio (speech) can only be heard in 1 direction.
Should you encounter one of these problems, you will need to make slow
careful adjustments in one direction or the other until speech can be heard
in both directions and without distortion.
The balance POT is located on the back of DOOR PHONE under a small
removable white plastic plug. It should be adjusted using a small flat blade
screwdriver.
IMPORTANT NOTES
1) You will require TWO PEOPLE to adjust your Door Phone.
2) Wait 10 seconds after answering before adjusting the Pot.
3) DO NOT USE A TELEPHONE IN CLOSE PROXIMITY TO THE DOOR
PHONE, as feedback interference will affect the Balance Pot settings.
4) The Balance POT does not increase volume. Moving it when unnecessary
may cause a deterioration in audio quality or a loss of audio in 1 direction.
