David Clark 9500 SERIES, Руководство по установке

Страница: 30 / 31

19532P-76 (09-15) D-1
Appendix D
Master Station Adjustments
Radio Transmit Level Adjustments
These adjustments have been pre-set to optimum levels and should not need to be performed in the
field. However, they are included in this section should their adjustment be necessary.
To increase or decrease the transmit mic audio level for Radio 1, locate and adjust R3 on the inside
of the U9500 Master Station. For Radio 2, locate and adjust R17. For Radio 3, locate and adjust
R30. (see
Figure A1 for the locations of these components). Turning the potentiometers clockwise
will increase the levels and counter-clockwise will decrease the levels. Use a jeweler’s screwdriver to
make these adjustments. Please note that these are multi-turn potentiometers, so several rotations
may be necessary to achieve the desired results.
It is also important not to increase the levels so much as to over-modulate the radios. This is in
violation of FCC regulations and will seriously degrade the quality of the transmissions. If you have
the equipment to measure the modulation, 4-4.5 KHz is an optimum deviation level.
Radio Receive Level Adjustments
The factory has pre-set the receive audio adjustment potentiometers to levels which should be
acceptable in most applications. Should the need arise to change these settings, the installer may do
so by the following procedure:
To increase or decrease the receive audio levels for Radio 1, locate and adjust R2 inside the U9500
Master Station. For Radio 2, locate and adjust R10. For Radio 2, locate and adjust R21 (see
Figure
A1 for the locations of these components). Please note that these are multi-turn potentiometers, so
several rotations may be necessary to achieve the desired results.
System Volume Level Adjustment
The system volume (intercom volume) level is adjusted from the U9500 Master Station’s System
Volume knob. These instructions are provided should additional adjustment be necessary.
To increase or decrease the system volume level, locate and adjust R77 (See
Figure A1 ). Please
note that this is a multi-turn potentiometer, so several rotations may be necessary to achieve the
desired result.