User manual NADY ALD-800

[. . . ] The transmitter connects to the line out or tape out from a venue's existing sound system, and broadcasts the audio as an FM radio signal. Audience members who desire listening assistance use a pocket size Nady ALD-800 receiver with adjustable volume control and ergonomic, high performance earphones. The ALD-800 system is expandable--one transmitter will provide audio to a limitless number of receivers. ALD-800 TRANSMITTER Compact RF transmitter operating within the 72-76 MHz band designated for auditory assistance frequencies by the FCC. · · · · · · · · Eight factory switchable channels Input for line level audio Input for microphone Audio input gain control Automatic level control Extendible antenna AC-ALD800 9VDC regulated power supply adapter supplied LED power on and audio modulation indicators SETTING UP THE TRANSMITTER Your Nady ALD-800 requires minimum installation. [. . . ] If the LED stays on continuously and does not flash during modulation, the input is overloading and needs to be 2 3 Confirming Correct Installation The transmitter's "TX" LED 6 will flash when a microphone or line level signal is broadcast by the transmitter. If "TX" does not flash, turn the audio input gain control clockwise. This will increase audio level and cause "TX" to flash along with the program source. When "TX" is flashing, the transmitter is broadcasting properly. *For the best performance, (and to minimize the possibility of interference from another source), we suggest you experiment to find the minimal height the antenna must be extended in order to perform well in your particular environment. Channel Selection Channel selection is controlled by DIP switches inside the transmitter. Changing the channel can be done quickly by any qualified service technician. Contact your dealer or the Nady Customer Service Department for details. Using More Than One ALD-800 System You may operate up to three ALD-800 systems in the same location. For multiple system operation, please observe: · · · If operating two ALD-800 transmitters in the same location, use Ch. Locate the transmitters ten feet or more away from the performers wearing ALD-800 receivers. ALD-800 RECEIVER OPERATING INSTRUCTIONS ALD-800 RECEIVER Pocket-sized RF receiver for personal listening assistance. · · · · · · · · · Any number of ALD-800 receivers can be used with a single ALD-800T transmitter Ultra compact and lightweight Preset to one of eight auditory assistance channels Provides up to 130 dB SPL for hearing assistance Volume control adjust Antenna integral with earphone cord Mini binaural EB-800 earbud earphones included LED "power on" indicator Accepts standard 9V alkaline battery Powering The Receiver Install a 9V battery in battery compartment 1 , observing polarity. To preserve battery life, always turn the ALD-800 receiver off when it is not in use. The number of hours of operation per battery is as follows: carbon zinc type battery: 10-12 hours alkaline battery (recommended): 17-20 hours. Channel Selection Your receiver is pre-tuned at the factory to the same channel as your transmitter. Should you wish to have your transmitter channel changed, as explained in the Transmitter Operating Instructions section of this manual, you must also have your receiver(s) retuned as well. Using the ALD-800 Earphones Plug the included earphones into the earphone jack 2 on top of the receiver. The earpads can be ordered separately, and since they cost very little, you may wish to dispose of them after use. However, the earpads can be replaced and reused after being washed in a mild detergent, rinsed and air dried. Operating the Receiver While wearing your earphones, stand near the ALD-800 transmitter. (To turn the receiver off, rotate the Off/On/Volume wheel until it clicks, and the "power on" indicator will go out. ) Listen for your program source, and adjust receiver volume to a comfortable listening level. NOTE: A slight buzzing may be heard if the receiver is used within six feet of the transmitter. [. . . ] The receiver provides a 3. 5 mm headphone output jack mounted on the top panel. The receiver has an OFF/ON/VOLUME control mounted on the top panel, LED lamp to indicate battery strength, and an antenna shall be integral to the earphone/earbud cord. The receiver model number is ALD-800. NADY ALD-800 RECEIVER ALD-800 Receiver (Front Panel) ALD-800 Receiver (Top Panel) 2 Earphone Jack 4 Power On LED 3 ON/OFF Volume SPECIFICATIONS OVERALL SYSTEM PERFORMANCE Frequency Response . . . . . . . . . . 100 Hz-15KHz ± 3 dB Signal to Noise Ratio . . . . . . . . . . 60 dB Total Harmonic Distortion . . < 0. 5% RF Carrier Frequencies . . . . . . Eight channels between 72-76 MHz. Channel AA:72. 1, BB: 72. 3, CC: 72. 5, DD: 72. 7, EE: 72. 9, FF:75. 5, GG: 75. 7, HH: 75. 9 Frequency Stability. . . . . . . . . . . . . . Better than . 005% Modulation . . . . . . . . . . . . . . . . . . . . . . . . . . FM ± 75 KHz max Operating Range . . . . . . . . . . . . . . . . Up to 300 feet line-of-sight Power Requirement . . . . . . . . . . . . 9 VDC, regulated @200 mA, AC-ALD800 adapter provided Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . 1. 25" H, 8. 25" W, 4. 25" D (3. 175 x 20. 9 x 10. 8 cm) Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18. 2 oz. [. . . ]