User's Manual

5
U-81 OCTAVO RECEIVER OPERATING INSTRUCTIONS
• For each channel you wish to use, insert an audio cord with a XLR female plug into its
Balanced XLR out (9) jack on the back of the receiver. Plug the other end of this cord
into your amplier, effects or mixing board. The individual receiver outputs are all xed
mic level.
• The U-81 OCTAVO also has a MIX unbalanced output (10), which is a SUM line
level output of all the channels. To use it, just plug an audio cable with a 1⁄4” mono
plug into the MIX out (10) and plug the other end to your amplier or mixing board.
The front panel individual receiver volume controls (6) can be used to adjust any
channels level on the MIX out (10). Turn the volume controls on each of the channels
being used clockwise to near full gain. Adjust each volume up or down so that no
audio distortion is present when the ampier or mixer is set at their usual levels.
(Note: Turn the volume controls of any unused channel all the way off, full counter-
clockwise, so that only the channels being used are in the MIX output.)
• Your U-81 OCTAVO is now operational and ready to use. Now that you have completed
the above step, proceed to instructions for the UH-81 or UB-81 transmitters included
with your system.
Note:
• To prevent possible undesired noise during use, keep the volume controls of unused
channels (corresponding transmitter off) turned off in the amplier or the mixer. The
audio should only be “live” if the transmitter is on.
• As when making any connection, make sure the amplier or mixing board volume is
at the minimum level before plugging in the receiver to avoid possible sound system
damage.
• Only one transmitter can be used with one receiver. It is not possible to use two
transmitters on the same frequency and mix the output of these transmitters into one
wireless receiver.
SPECIFICATIONS
OVERALL SYSTEM PERFORMANCE
RF Carrier Frequencies ........................................................ Selected factory installed frequencies
between 902-928MHz and 944-952MHz
Frequency stability ......................................................................... +/-0.005% (Crystal Controlled)
Audio Deviation ..............................................................FM +/-20kHz normal, +/-50kHz maximum
Frequency Response ......................................................................................... 20Hz-20kHz, -3dB
Dynamic Range...................................................................................................................... 120dB
Harmonic Distortion ........................................................................................... 0.5% THD, normal
Operating Range ...........................................................250 feet normal, 500+feet max line of sight
RECEIVER
Reception ...................................................................................................Mono antenna reception
Antennas ..................................................................................10” (25.4 cm) Dual adjustable angle
Mute Threshold ....................................................................................... -95dBm (none-adjustable)
Image Rejection ..................................................................................................... -70dB, minimum
Balanced output ....................................................Audio outputs: +/-24mV xed level (600 Ohms)
Unbalanced MIX output ........................................ Audio output: 360mV variable level (Open load)
Connectors ........................................................... Balanced: XLR, Unbalanced: 1⁄4” TS, Antennas:
TNC connector. DC in: 2.1mm barrel type
Indicators .............................................................................................Power On, RF and AF LEDs
Controls ...........................................................................Power ON/OFF buttons, Volume Controls
Power Requirement ................................................................................................15VDC/1200mA
Dimensions ................ 14.25” x 12” x 1.75 [W / D / H] (36.20 cm x 30.50 cm x 4.45 cm) [W / D / H]
Weight ................................................................................................................... 7.20 lbs (3.37 Kg)
TRANSMITTERS
Models Available .................................................................UH-81 Handheld and UB-81 Bodypack
Input Connectors
UH-81 Handheld .......................................Integral Nady DM-50D neodymium dynamic cartridge
UB-81 Bodypack .................................................................................... 3.5mm locking mini-jack,
Controls
UH-81 .......................................................................................................Power ON/STDBY/OFF
UB-81 ................................................................... ON/STDBY/OFF, Input Level Control (LT/HM),
selectable inputs—internal HM/LT switches
RF Power ........................................................... 20mW normal (50mW Maximum allowed by FCC)
Harmonics and Spurs ........................................................................................................< -50 dB
Antennas ....................................................................................... UH-81/UB-81: Internal antennas
LED Indicators
UH-81/UB-81 .............................Single LED ashes once for “ON”, lights steady for ”LOW BAT”
Battery
UH-81 ..........................................................................................2xAA Alkaline or NiMH batteries
UB-81 ......................................................................................Single 9V Alkaline or NiMH battery
Battery Life ......................................................................................................8-10 Hours (Alkaline)
Dimensions
UH-81 .........................................................................................10.5”x 1.875” (26.7 cm x 4.8 cm)
UB-81 ................................................................... 4.25” x 2.5”x 1.0” (10.8 cm x 6.4 cm x 2.5 cm)
Weight ...............................................................................................................................................
UH-81 .............................................................................................. 7.5 oz (213 g) without battery
UB-81 ................................................................................................ 3.1 oz (88 g) without battery
12
10
5 8 1
2a
6
4 7
9 2c3
2d2d
2b
2a