Nady Systems U-800 Powering the Receiver, Adjusting Antennas, Keyboard/Buttons Lock Function

Powering the Receiver

Plug the AC/DC ADAPTER (23) provided into the DC INPUT JACK (20) on the back of the receiver. Then plug the power supply into an AC outlet. (Note: Any 22V DC source with 400mA capability can also be used.) Press the POWER SWITCH (1) once to turn on the receiver. The POWER ON LED (2) and the LCD DISPLAY (5) will now light and the receiver is operational.

Adjusting Antennas

The U-800 has two permanently attached, flexible elbow ANTENNAS (3) for diver- sity reception. Unfold and rotate these antennas to operate the receiver. The optimal positions of the antennas are flared 45° out from the receiver sides and 90° 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.

Adjusting the Mute Level/ RF Squelch

The MUTE LEVEL/RF SQUELCH (13) can be changed anytime during the main screen display to quiet the receiver in high noise environment condition. The control ranges are from level 0 to level 5. The level should be adjusted to a lower number for the minimum RF squelch setting at which the RF INDICATOR (8) will remain on while your transmitter is in normal use, up to the maximum operating range antici- pated in use for your application. However, in areas of high RF activity, the squelch control may need to be adjusted to a higher number. If the transmitter is off and the receiver’s signal RF INDICATOR (8) or the diversity A or B INDICATOR (9) flickers or stays on continuously, the squelch should be adjusted to a higher number to stop the flickering. Be careful not to select too high a number setting as this may reduce the operating range to below what is needed. A range walk test will help in select- ing the proper level. If the range is not critical, note that a higher level (maximum squelch) setting will also yield a quieter mute function, which might be desired in certain applications. The squelch level is factory preset at maximum sensitivity and operating range (i.e. level 0 for minimum squelch level—maximum usable range).

Note: For easier intuitive operation, the MIN and MAX indications for this control refer to the minimum and maximum operating range settings, not to the actual mute levels selected, which are the opposite as per above.

Keyboard/Buttons Lock Function

Use keyboard/Buttons Lock Function to lock or unlock the receiver controls, prevent- ing accidental adjustment during use: You can push and hold MENU BUTTON (18), then push UP BUTTON (16) to lock; push and hold MENU BUTTON (18), then push UP BUTTON (16) again to unlock. The Keyboard/Buttons must be unlocked before you can make a selection: AUTO SCAN, Group/Channel or MUTE levels.

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