Lectrosonics Inc MM400 Manuale Utente
8
BATTERY INSTALLATION
The transmitter is powered by a standard lithium, NiMh or alkaline AA 1.5 Volt battery. Standard zinc-carbon batteries
marked “heavy-duty” or “long-lasting” will not work. NiMh rechargeable batteries will only provide 2 hours of
operation but will run down quite abruptly. Alkaline batteries provide over 2 hours of operation with some warning.
Lithium batteries can be used to provide up to 4.5 hours. The battery status circuitry is designed for the voltage drop
over the life of lithium batteries.
marked “heavy-duty” or “long-lasting” will not work. NiMh rechargeable batteries will only provide 2 hours of
operation but will run down quite abruptly. Alkaline batteries provide over 2 hours of operation with some warning.
Lithium batteries can be used to provide up to 4.5 hours. The battery status circuitry is designed for the voltage drop
over the life of lithium batteries.
To open the battery compartment, unscrew the battery door. Remove the door and take note of the polarity marked on
the case showing the location of the positive (+) and negative (-) terminals. You can see the small contact hole inside
the battery compartment with the door open.
the case showing the location of the positive (+) and negative (-) terminals. You can see the small contact hole inside
the battery compartment with the door open.
Insert the battery correctly and close the cover by screwing the door shut. If the battery is inserted incorrectly, the
door will not screw in easily and the unit will not work.
door will not screw in easily and the unit will not work.
OPERATING INSTRUCTIONS
1)
Insert the microphone plug into the input jack, aligning the pins; be sure that the connector locks in.
2)
Attach the antenna to the SMA connector on the top of the transmitter.
3)
Mute the sound system.
4)
Install a fresh battery according to the instructions above.
5)
Position the microphone in the location you will use in actual operation.
6)
While speaking or singing at the same voice level that will actually be used, observe the MODULATION LEDs.
Adjust the AUDIO LEVEL control until the LEDs begin to light. Start at a low setting where neither LED lights as
you speak. Gradually, turn the gain up until the –20 dB LED lights green and then the -10 dB lights green. We
strongly recommend setting the gain of the transmitter even higher so that the first red LED occasionally lights.
Adjust the AUDIO LEVEL control until the LEDs begin to light. Start at a low setting where neither LED lights as
you speak. Gradually, turn the gain up until the –20 dB LED lights green and then the -10 dB lights green. We
strongly recommend setting the gain of the transmitter even higher so that the first red LED occasionally lights.
7)
Once the gain has been adjusted, the audio system audio can be turned on to make level adjustments in the main
audio system.
audio system.
OPERATING NOTES
The AUDIO LEVEL control should not be used to control the volume of your sound system or recorder levels. This
gain adjustment matches the transmitter gain with the user’s voice level and microphone positioning.
gain adjustment matches the transmitter gain with the user’s voice level and microphone positioning.
If the audio level is too high — both red LEDs will light frequently or stay lit. This condition may reduce the dynamic
range of the audio signal.
range of the audio signal.
If the audio level is too low — neither LED will light, or the -20 LED will light green. This condition may cause hiss and
noise in the audio. Different voices will usually require different settings of the AUDIO LEVEL control, so check this
adjustment as each new person uses the system. If several different people will be using the transmitter and there is
not time to make the adjustment for each individual, adjust it for the loudest voice.
noise in the audio. Different voices will usually require different settings of the AUDIO LEVEL control, so check this
adjustment as each new person uses the system. If several different people will be using the transmitter and there is
not time to make the adjustment for each individual, adjust it for the loudest voice.