11
Digital Frequency Agile UHF Hand-held Transmitter
Rio Rancho, NM – USA
OPERATING INSTRUCTIONS
ADJUSTING THE GAIN
1)
Install a fresh battery. Leave the battery cover off for further adjustment.
2)
On the bottom panel, move the “P” (power) switch to ON, toward the LED. Observe that the battery status LED is
glowing green indicating a good battery. If the LED is glowing red, replace the battery.
Note: If the security level is set to “2”, the receiver must be powered on before the transmitter.
If the security level is set to “3”, communications do not begin until a fresh key is transfered.
3)
Hold the microphone in the same position that it will be used in actual operation.
4)
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.
If you find that the AUDIO LEVEL control is set to minimum and the LIMIT LED is still on often, then adjust the
preamp level control. This control is located under the windscreen. Unscrew the windscreen and carefully lift it
off the top of the unit. See the VERIMIC CONTROLS section for these adjustments. If you need to change these
controls, be sure to repeat the gain adjustment procedure beginning at step 3.
5)
Once the gain has been adjusted, the audio system audio can be turned on to make level adjustments in the
main audio system.
SETTING THE ENCRYPTION KEY
Please refer to the receiver manual for instruction on setting the encryption key.
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.
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.
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.
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.
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.
To gain access to these switches, slide the access door sideways with a finger-
nail.
The UDR700 receiver front panel will indicate the correct switch settings to match the receiver frequency.
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