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Manual abstract: user guide ELECTRO-VOICE 625HSDATASHEET

Detailed instructions for use are in the User's Guide.

[. . . ] SECURE-PHASEtm DIVERSITY The 625HS Series receivers utilize patented Secure-Phasetm diversity circuitry that provides the strongest, cleanest signal possible. Unlike other diversity circuits that switch antennas, SecurePhasetm utilizes the signal from both antennas at all times to increase signal strength, minimize dropouts and lower the potential for interference. If the signal from the transmitter changes phase or polarity (a common cause of dropouts), the circuit adjusts the phase angle between the two antennas receiving circuits to prevent cancellation. 625HS SERIES COMPONENTS 625HS Secure-Phasetm Diversity Receiver Secure-Phase diversity for maximum range and reliable performance tm Description Power can also be supplied from a 12-volt battery or filtered power supply. [. . . ] Speak into the microphone or strum the instrument and, if necessary, adjust the receivers output until the volume level from the wireless system approximates the level of an equivalent wired microphone or instrument. If problems occur, see the troubleshooting section. Figure 1 HTV HANDHELD TRANSMITTER SETUP 1. Slide open the battery compartment cover by pressing lightly with your thumb on the horizontal grooves (at the back end of the transmitter) while gently pulling back (see Figure 2). Turn on the transmitter by sliding the power switch (nearest the battery compartment) forward, toward the mic element. Both red and green LEDs above the power switch should be illuminated, indicating power on and good battery condition. Observe that the audio carrier light on the front panel of the receiver is illuminated, an indication that the receiver is picking up the signal. Then, walk the intended area of use and make sure that there are no barriers to reception or sources of interference. Unmute the audio by sliding the audio switch (immediately below the mic element) towards the windscreen. First, speak or sing into the microphone and listen closely for distortion or hiss. If the gain is too low (hiss) page 4 Figure 2 or high (distortion), adjustments are necessary. flat head screwdriver) into the hole near the head of the transmitter (see Figure 4). Because of the specialized equipment required to adjust these units properly, users cannot change frequencies. If two or more 625HS and/or other VHF/UHF wireless systems are being used in the same location, proper frequency coordination is required to avoid interference. Frequency mixing and spacing must be factored along with local TV stations to determine if conflicts will result from a specific group. Contact your dealer or Electro-Voice for frequency-selection assistance if you are planning to add more wireless systems to be operated simultaneously in the same location. POTENTIAL SOURCES OF INTERFERENCE There are many potential sources of interference for your wireless system. Any electronic compo- nent that contains digital circuitry including digital signal processors (reverb/multi-effects units), electronic keyboards, digital lighting controllers, CD players and computers all emit rf energy that can affect the performance of your wireless system. It is always best to place your receiver as far away from these devices as possible to minimize the potential for of problems. BATTERY RECOMMENDATIONS Fresh 9-volt alkaline batteries from a quality manufacturer will yield the best performance from 625HS transmitters. 8. 4-volt ni-cad batteries can be used but will yield much shorter operational time. When the transmitter switch is turned on, the battery light will flash one time if the battery is good. If the light does not flash or stays lit continuously, the battery is weak or nearly dead. [. . . ] Receiver audio set too high, overloading the mixer/preamp/amplifier input. Signal interference Another wireless microphone in the immediate vicinity operating on the same frequency, or on a frequency that mixes with another transmitter (such as a TV broadcast transmitter) onto the wireless frequency. Strong electromagnetic field from stage lighting or other source near the transmitter or receiver, producing "rf noise" on or near the operating frequency of the wireless system. Short-range or frequent drop-outs Faulty receiving antenna system. Reposition antennas or receiver. Faulty transmitter antenna. [. . . ]


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