DR-4000 Series Professional UHF Wireless Systems
DR-4600 Handheld Dynamic Microphone System
DR-4500 Instrument Body Pack System
www.digital-reference.com
17
Setting the Transmitter Power Level
DR-T40 and DR-T45 transmitters have two RF power
settings: High (25mW) and Low (2.5mW)
Unnecessary use of High Power mode can result in
increased intermodulation interference between multiple
wireless units. It’s recommended that you start with the
RF Transmit Power set to Low. Please note the following
guidelines when selecting RF Transmit Power:
• RF Transmit Power is not related to sound quality.
• Low Power allows for a greater number of simultaneous
systems on air, and will not overload the receiver when
the distance between transmitter and receiver is close
(i.e. a performer standing in front of a guitar amp).
• High Power allows for greater transmission distance,
but reduces the number of simultaneous systems on
air, and can overload the receiver at close distances.
• Only use High Power mode if greater distance is
required over the Low Power setting.
Setting the Transmitter Input Volume Level
The DR-T40 and DR-T45 transmitters feature an Input
Volume attenuation adjustment in the transmitter LCD
screen. This Input Volume attenuation adjustment reduces
the transmitter’s input sensitivity in -10dB increments.
• The default Input Volume for the DR-T40 hand held
transmitter is -10dB.
• The default Input Volume for the DT-T45 body pack
is 00dB.
• The optimum average AF level on the received should
be should be between 3
–
4 Green lights.
• Input Volume should be reduced if the receivers AF
Level is consistently hitting the red, and/or the sound
is constantly distorted.
• The signal produced by loud singers or talkers may
need to be attenuated.
• Instruments with active pick-up systems may need to
be attenuated.
8868 Digital Ref 4600 Manual.indd 17
10/27/09 10:37:17 AM
