| General Information |
| Manufacturer | Sony |
| Manufacturer Part Number | WD-820A |
| Product Line | MHz Band Antenna |
| Product Name | WD-820A MHz Band Antenna Divider |
| Marketing Information | UHF antenna divider allows connection of up to 4 diversity distribution outputs when using a pair of AN-820A antennas. The WD-820A can receive RF signals from a WRT-810A, WRT-830A or WRT-820A and distribute then to up to four WRR-840A or WRR-820A tuners. Connection of up to 4 AN-820A antennas, expanding the operating area. |
| Features & Benefits |
- Four diversity distribution output connectors for distributing the RF input signal from up to three MB-806A tuners
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- Two pair of antenna input connectors for connection of up to four AN-820A antennas allowing expansion of the operating area
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- Cascade three WD-820A's to control up to 19 channels
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- Unlike the heavily used VHF band, the area around 800 MHz in the UHF band is underused. With this lower activity, the systems are not affected by external noise and interference caused by other wireless systems and provide for low noise transmission and reception.
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- A PLL (Phase Locked Loop) synthesized system controls the transmission and reception frequencies of the system. It assures stability and easy access to multiple channel frequencies. Equipped with a PLL synthesized control system, Sony's UHF Synthesized system provides up to 94 selectable frequencies.
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- Each unit has a convenient memory back-up capability. When the Power switch is turned on, the previous channel setting is automatically recalled and displayed.
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- Wireless channels are conveniently preset in each tuner for use in a multi-channel operation at one location. The UHF Synthesized System employs 6 channel plans with up to 19 channels for simultaneous multi-operation use. The use of preset channels instead of random selection of channels prevents interference such as beat noise in multi-channel operation and guarantees better unit isolation.
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- To ensure accurate audio reproduction, the UHF Synthesized System is equipped with tone squelch circuitry control. Here's how it works: the transmitters broadcasts audio signals together with a 32 KHz tone signal. Only after receiving the tone signals will the receivers reproduce the audio signals for output. This function eliminates external noise and other unwanted signals.
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- All of the transmitters and receivers have built-in LCD displays. They provide extensive information on group, battery status, AF level, etc. Employing a back light, these indicators can be seen even in low-light situations.
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- The UHF Synthesized System employs a Compander (Compressor/Expander) system for optimum transmission over a wide dynamic range with low noise and interference.
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- A space diversity reception system is equipped with two or more antennas used to eliminate noise and signal dropouts, thus ensuring stable reception. An additional benefit of this system is stable reception and cleaner audio at extended operating distances.
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