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Setting Up and Using Your UM1 System
9. Set the UM1 Meter switch to "RF." One or more segments in the UM1 meter should light. If
the "HIGH" segment lights, the UM1 is receiving an optimally strong RF signal and is placed and
positioned correctly. If the "LOW" segment lights (indicating a relatively weak RF signal), try relo-
cating the UM1 or changing the position of one or both of its antennas.
10. If you want to use headphones to monitor the transmission, connect a standard "Walkman"-
type 30 ohm headphone to the UM1 headphone output and adjust the Level control until the
desired level is reached.
11. Turn on your connected amplifier and/or mixer but keep its volume all the way down. Next,
make sure that your transmitter is unmuted by setting its Audio switch to "On." If you are using
the CT7 transmitter or if you are using the CT7 transmitter with a connected lavalier microphone
or headset, speak or sing into the mic at a normal performance level while slowly raising the
volume of your amplifier/mixer until the desired level is reached. If you are using the CT7 trans-
mitter with a connected instrument, play the instrument at normal performance level while
slowly raising the volume of your amplifier/mixer until the desired level is reached. If you are
using a CT7 beltpack transmitter equipped with a lavalier microphone, note that correct lavalier
placement is critical to sound quality. We recommend that you place it as shown in the illustra-
tion on the right—as close to your mouth as possible but
off to one side (to minimize nasality) and unobstructed
by clothing. Bear in mind also that omni microphones
(mics which pick up signal from all directions) are more
prone to feedback problems than unidirectional (cardioid
or hypercardioid) ones; in general, you can avoid feedback
by taking care not to use any microphone directly in front
of a PA speaker (if this is unavoidable, try using an equal-
izer to attenuate those high- or mid-range frequencies
which are causing the feedback "squealing").
12. If you hear distortion at the desired volume level, first
check to see whether the red "Peak" LED on the UM1 is lit.
If it is not, make sure that the gain structure of your audio
system is correctly set (consult the owners manual of your
mixer and/or amplifier for details). If the red "Peak" LED is
lit, do the following:
• If you are using a HT7 transmitter, use the supplied plastic screwdriver to turn its
Microphone Input Level control (trimpot) slowly counterclockwise (towards the "Min" posi-
tion) until the distortion disappears.
• If you are using a CT7 transmitter with connected lavalier microphone or headset, its Audio
Input Level control has been factory preset to provide optimum level for the particular
lavalier or headset model being used and so no adjustment should be necessary. Any dis-
tortion present should therefore simply be a matter of the microphone being too close to
the mouth; try moving it further away. If this does not solve the problem, use the supplied
plastic screwdriver to turn the Audio Input Level control (trimpot) on the CT7 slowly coun-
terclockwise until the distortion disappears.
• If you are using a CT7 transmitter with an instrument such as electric guitar or bass, lower
the output level of the instrument until the distortion disappears. Alternatively, you can
use the supplied plastic screwdriver to turn the Level control (trimpot) on the CT7 slowly
counterclockwise until the distortion disappears.
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