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Thank you for purchasing AZDEN’S “PERFORMANCE SERIES” wireless system. UHF wireless
systems yield a better signal to noise ratio and improved frequency response over VHF systems. The
UHF band is less crowded than VHF thus giving you less likelihood of interference. This manual covers
the 411UDR and 511DRH receivers and the 51BT, 51XT and 51HT transmitters.
Receiver Descriptions: The 411UDR and 511DRH are crystal controlled, PLL synthesized receivers with 63
on-board user selectable frequencies with a range of 794MHz to approx. 806MHz. They are true diversity,
containing two separate receivers, each operating on the same frequency. The transmitter’s output signal is
monitored constantly by a diversity circuit, which switches automatically to the receiver with the stronger RF
signal. This allows wireless performance that is virtually dropout free, even under the most adverse condi-
tions. Both receivers feature a 1/4-inch and XLR output jacks and volume adjustment.
(1) Power LED and on/off switch (511DRH only)
After plugging in the 511DRH, depress the on/off switch to turn unit on. The 411UDR’s Power LED will
illuminate as soon as the unit is plugged in.
(2) Antenna A-B LED’s
When the transmitter is turned on and is in reception range of the receiver, either the A or B LED will light up
RED, depending on which receiver circuit is getting the strongest signal from the transmitter. Flickering
between the A and B LED is a normal function of the system.
(3) Peak LED
These will flash if the audio component of the incoming signal is approaching distortion. The 511DRH has a 7
segment LED display to show the incoming audio signal from -20 to + 6 dB.
(4) Antennas, antenna connections
On both the 411UDR and 511DRH, position the antennas vertically for best reception. On the 411UDR, when
not in use put the antennas in the holder to avoid damage. On the 511DRH the antennas are connector
mounted (BNC) so that the supplied antennas can be disconnected and/or removed.
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