Lectrosonics Inc UM400 사용자 설명서
9
Frequency-Agile UHF Belt-Pack Transmitter
Rio Rancho, NM – USA
7)
While speaking or singing at the same voice level that will actually be used, observe the MODULATION LEDs.
Adjust the AUDIO LEVEL control knob until the LEDs begin to light. At too low a setting neither LED will light 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 knob until the LEDs begin to light. At too low a setting neither LED will light 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.
8)
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 knob 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.
This 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 only the -20 LED will light green. This condition may cause hiss
and noise in the audio.
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.
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.
ADJUSTING THE TRANSMITTER FREQUENCY
If you are experiencing interference from another signal on your frequency, you may want to change the operating
frequency of your system. The left switch changes the operating frequency by 1.6 MHz per step and the right switch
changes it 100 kHz per step. If you are experiencing interference, change the operating frequency in 100 kHz steps to
find a clear channel. If it is not possible to find a clear channel using the 100 kHz switch, return it to its original
position and change the 1.6 MHz switch by one click then try the 100 kHz
switch again.
frequency of your system. The left switch changes the operating frequency by 1.6 MHz per step and the right switch
changes it 100 kHz per step. If you are experiencing interference, change the operating frequency in 100 kHz steps to
find a clear channel. If it is not possible to find a clear channel using the 100 kHz switch, return it to its original
position and change the 1.6 MHz switch by one click then try the 100 kHz
switch again.
To gain access to these switches, slide the access door sideways with a
fingernail.
fingernail.
With the 400 series receivers, the front panel LCD character display will
indicate the correct transmitter switch settings.
indicate the correct transmitter switch settings.
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0 1
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