Install Instructions - Williams Sound

unacceptable situation, use a connection scheme like those described in the section AvoidingGround Loops.Set the Audio Select Switch for Line input when connecting to 2-16 Ω speakers. Set theAudio Select Switch for 70 V when connecting to 25 V or 70 V speaker lines.Speaker lines are most often equalized, making them an inferior signal source. Source signalsshould not be equalized.TAPE OUTPUTA line level output of the fully processed, “as transmitted” audio is provided through thisjack. Use it for monitoring audio quality, providing a processed signal for recording, or forother uses.FM CHANNEL/FM POWER SWITCHThe channel frequency and RF output power level are set according to a chart shown inFigure 4 as well as on the top of the unit. “On” and “Off” are labeled on the body of the DIPswitches. 10 wide band FM frequencies are available.Once the FM Channel/FM Power Switch is set, no further adjustment is required. RF outputcan be reduced to alleviate problems caused by inadequate immunity to RF in some audioequipment. Williams Sound offers a document (Technical Bulletin: Buzz Or Hum In TheSound System, FRM 531) giving suggestions for improving RF immunity in existing audioequipment.Figure 4: FM Channel Switch SettingsRF CONFIG SWITCHSWITCH SETTINGS1 2 3 4 5FREQUENCY72.100 MHz ON ON ON ON OFF72.300 MHz ON ON OFF ON OFF72.500 MHz ON OFF ON ON OFF72.700 MHz ON OFF OFF ON OFF72.900 MHz OFF ON ON ON OFF74.700 MHz OFF ON OFF OFF ON75.300 MHz ON ON ON OFF OFF75.500 MHz ON ON OFF OFF OFF75.700 MHz ON OFF ON OFF OFF75.900 MHz ON OFF OFF OFF OFFRF OUTPUT POWERFULLHALFQUARTEROFF6 7 8OFF OFFOFFONONOFFON ONSwitches 1-5 toggles controlfrequency settingsSwitch 6 is not usedSwitches 7 and 8 control RF outputpower. The factory setting is FULL, andcan be adjusted if conditions warrant.See Troubleshooting Guide.Remember: If you change thetransmitter frequency, you must alsochange receiver frequencies.POWER IN21 VAC to 26 VAC only, 50 or 60 Hz (TFP 016 Power Supply included with system).Current consumption is approximately 200 mA. One side of power input is connecteddirectly to circuit common (Chassis).10Williams Sound ®Helping People Hear