Enping Ding Li Acoustics Technological Co. Ltd. UH3 Manuale Utente
4
1. Rackmounting the Receiver
There are 2 options available for rackmounting the UHF-3 receiver: singly or side-by-
side with another UHF-3 Series receiver.
There are 2 options available for rackmounting the UHF-3 receiver: singly or side-by-
side with another UHF-3 Series receiver.
a. Single mounting: Remove the receiver SIDE MOUNT CLIP (1) from each side of
the receiver (as shown) and slide in the optional ERM-3 RACK EARS (2).
b. Side-by-side double mounting: After removing the SIDE MOUNT CLIPS (1) from
both UHF-3 receivers, join the two receivers with the EJC-3 JOINING CLIP
(3)
(3)
and attach the ERM-33 RACK EARS (4) as shown.
(Note: Do not mount
the receiver in a rack directly above an amplifier or other source of high heat –
this could degrade the performance of the UHF-3. Always ensure adequate
airflow and heat dissipation in any rack configuration.)
this could degrade the performance of the UHF-3. Always ensure adequate
airflow and heat dissipation in any rack configuration.)
2. Powering the Receiver
Plug the 12V AC/DC ADAPTER (5) provided into the DC INPUT JACK (9) on the back
of the receiver. Then plug the power supply into an AC outlet.
Plug the 12V AC/DC ADAPTER (5) provided into the DC INPUT JACK (9) on the back
of the receiver. Then plug the power supply into an AC outlet.
(Note: Any 12V DC
source with 400mA capability can also be used.) Press the POWER SWITCH (11)
once to turn on the receiver. The POWER ON LED (12) will now light and the receiver
is operational.
once to turn on the receiver. The POWER ON LED (12) will now light and the receiver
is operational.
3. Antennas
The UHF-3 receiver is supplied with TELESCOPIC ANTENNAS (15). These should be
extended fully to obtain maximum range. Optimal antenna position is 45 degrees
from the receiver (at 90 degrees from each other). For maximum range, it is always
best to maintain a line of sight (no obstructions) between the receiver antennas and
the transmitter at all times whenever possible.
The UHF-3 receiver is supplied with TELESCOPIC ANTENNAS (15). These should be
extended fully to obtain maximum range. Optimal antenna position is 45 degrees
from the receiver (at 90 degrees from each other). For maximum range, it is always
best to maintain a line of sight (no obstructions) between the receiver antennas and
the transmitter at all times whenever possible.
4. Mute (Squelch) Adjustment
In normal operation, the SQUELCH CONTROL (6) should be set fully clockwise to the
factory preset RF level (Max. Sens.). However, in areas of high RF activity, the squelch
(or mute, as it is sometimes called) may need to be adjusted to compensate for the
adverse conditions in a particular location. If, with the transmitter off, the receiver’s A
and/or B DIVERSITY LED INDICATORS (13) flicker or stay on, the squelch control
should be turned counterclockwise until the A and/or B LEDs extinguish. When the
squelch is properly adjusted, the A and/or B LEDs will only light when the system
transmitter is turned on. Turning the squelch control too far counterclockwise will
reduce the range, but yield a quieter squelch (mute) function. During operation,
especially at ranges greater than 75 feet, one or the other of the A or B LEDs may
extinguish briefly. This is normal–the unit’s DigiTRU Diversity™ reception ensures that
the received audio will not be interrupted. When both LEDs extinguish, the transmitter
is out of range for that given location, and the user should move closer to the receiver
to re-establish the radio link.
In normal operation, the SQUELCH CONTROL (6) should be set fully clockwise to the
factory preset RF level (Max. Sens.). However, in areas of high RF activity, the squelch
(or mute, as it is sometimes called) may need to be adjusted to compensate for the
adverse conditions in a particular location. If, with the transmitter off, the receiver’s A
and/or B DIVERSITY LED INDICATORS (13) flicker or stay on, the squelch control
should be turned counterclockwise until the A and/or B LEDs extinguish. When the
squelch is properly adjusted, the A and/or B LEDs will only light when the system
transmitter is turned on. Turning the squelch control too far counterclockwise will
reduce the range, but yield a quieter squelch (mute) function. During operation,
especially at ranges greater than 75 feet, one or the other of the A or B LEDs may
extinguish briefly. This is normal–the unit’s DigiTRU Diversity™ reception ensures that
the received audio will not be interrupted. When both LEDs extinguish, the transmitter
is out of range for that given location, and the user should move closer to the receiver
to re-establish the radio link.
UHF-3 RECEIVER
9
(Note: Scratchy noises can sometimes occur when some electric guitars with dirty pots
or connections are used with any wireless system. There fore, the supplied
INSTRUMENT CORD (34)
or connections are used with any wireless system. There fore, the supplied
INSTRUMENT CORD (34)
has a factory installed capacitor inside the 1/4" plug. This
capacitor provides first order filtering of the RF signal from the cord into the guitar
and eliminates virtually all scratchy noises. Should your equipment still give you
scratchy noises, we suggest these steps to eliminate them:
1) Make sure all guitar volume and tone pots are clean and all contacts are solid–this
is very important.
2) A 47pf capacitor soldered across the hot to ground terminals of the guitar’s
volume and tone pots will provide extra filtering.)
and eliminates virtually all scratchy noises. Should your equipment still give you
scratchy noises, we suggest these steps to eliminate them:
1) Make sure all guitar volume and tone pots are clean and all contacts are solid–this
is very important.
2) A 47pf capacitor soldered across the hot to ground terminals of the guitar’s
volume and tone pots will provide extra filtering.)
6. Microphone Use (with either a lavalier or headworn microphone)
Secure the connection from the LAVALIER (36) or HEADWORN MIC CORD (35) by
turning the slip ring on the plug into the transmitter clockwise to thread it on to the
jack. To unplug, reverse the process. To use the lavalier mic, attach it at chest level.
Do not place it too close to the mouth–a distance of about six inches usually works
best. To use the headworn mic, place it on the head and adjust the boom so that the
mic is about one inch to the side of the front of the mouth. As the microphone cord
also serves as the antenna, be sure to extend it fully. Rolling up or shortening the cord
may reduce the effective operating range–keep it as straight as possible. When ready
to speak, slide the audio MUTE SWITCH (27) to the ON position. Adjust the volume of
the receiver as per the Audio Output Microphone Connection section of the above
UHF-3 receiver instruction
Secure the connection from the LAVALIER (36) or HEADWORN MIC CORD (35) by
turning the slip ring on the plug into the transmitter clockwise to thread it on to the
jack. To unplug, reverse the process. To use the lavalier mic, attach it at chest level.
Do not place it too close to the mouth–a distance of about six inches usually works
best. To use the headworn mic, place it on the head and adjust the boom so that the
mic is about one inch to the side of the front of the mouth. As the microphone cord
also serves as the antenna, be sure to extend it fully. Rolling up or shortening the cord
may reduce the effective operating range–keep it as straight as possible. When ready
to speak, slide the audio MUTE SWITCH (27) to the ON position. Adjust the volume of
the receiver as per the Audio Output Microphone Connection section of the above
UHF-3 receiver instruction
[Note: Observe care in selecting P.A. volume, transmitter location and speaker
placement so that acoustic feedback (howling and screeching) will be avoided. Please
also note the pickup pattern characteristics of the microphone selected.
Omnidirectional mics pick up sound equally from all directions, and are prone to
feedback if not used carefully. Unidirectional mics are more resistant to feedback, but
pick up sound sources best that are directly in front of the mic. Also, mics that are
farther from the sound source, such as lavaliers, require more acoustic gain and thus
are also more prone to feedback than close-source mics such as handheld or
headworn models that are used close to the mouth].
placement so that acoustic feedback (howling and screeching) will be avoided. Please
also note the pickup pattern characteristics of the microphone selected.
Omnidirectional mics pick up sound equally from all directions, and are prone to
feedback if not used carefully. Unidirectional mics are more resistant to feedback, but
pick up sound sources best that are directly in front of the mic. Also, mics that are
farther from the sound source, such as lavaliers, require more acoustic gain and thus
are also more prone to feedback than close-source mics such as handheld or
headworn models that are used close to the mouth].
For optimum performance, an INPUT LEVEL CONTROL (25) is provided. Adjust the
gain by turning the control with a small screw driver. For lavalier mic use, it is
recommended that the level be set at about 2/3 maximum. For headworn mic use, it
may be advisable to turn the gain down somewhat, depending on the volume levels
expected. In either application, experiment and set for maximum possible gain
without audible distortion on the high level peaks. (Note: Turning down the gain too
much can compromise the signal-to-noise and is not recommended.)
gain by turning the control with a small screw driver. For lavalier mic use, it is
recommended that the level be set at about 2/3 maximum. For headworn mic use, it
may be advisable to turn the gain down somewhat, depending on the volume levels
expected. In either application, experiment and set for maximum possible gain
without audible distortion on the high level peaks. (Note: Turning down the gain too
much can compromise the signal-to-noise and is not recommended.)
The UHF-3 receiver is equipped with a 5 segment LED AF LEVEL DISPLAY (14).
Occasional flickering of the top AF Peak LED indicator on loud inputs to the
transmitter is normal. If this LED lights continuously, but if the LED stays lit
continuously, turn down the INPUT LEVEL CONTROL (25) on the UB-3 transmitter, or
noticeable distortion may result.
Occasional flickering of the top AF Peak LED indicator on loud inputs to the
transmitter is normal. If this LED lights continuously, but if the LED stays lit
continuously, turn down the INPUT LEVEL CONTROL (25) on the UB-3 transmitter, or
noticeable distortion may result.