System features, Specifications – Nady Systems OCTAVO U-81 User Manual
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SYSTEM FEATURES
U-81 OCTAVO Wireless Receiver
• Operates on select UHF frequencies from 740MHz to 806MHz
• Eight independent single-channel UHF wireless receivers in a single housing for simul-
taneous operation for up to eight transmitters
• Front panel LED display indicates the RF and AF status for each channel
• Ch 1-8 individual balanced XLR MIC level outputs and Unbalanced LINE level SUM
1⁄4” jack output for 8-in-1 MIX audio output with separate volume control for each
channel
• Nady’s exclusive patented companding circuitry with 120dB dynamic range and highest
quality audio for an unsurpassed UHF performance
• Dual removable high gain antennas with TNC connector, front or back mounting
• Standard 19” 1U, all-metal rack mount housing
• Externally powered with AC/DC adapter included
• Choice of any combination of 2 transmitters: UH-81 and/or UB-81
UH-81 Handheld Microphone Transmitter
• Nady DM-50D neodymium cartridge delivers transparent vocals, maximum feedback
rejection and minimal handling noise
• ON/STDBY/OFF switch allows convenient audio muting while transmitter “ON”
• Status LED indicator flashes once for unit “ON”; lights steady for low battery alert
• 2 X AA alkaline or NiMH battery operation
• Rugged ABS and rubber-coated housing with integral antenna
UB-81 Bodypack Transmitter
• Choice of headworn or lavalier microphone operation with convenient input volume
control for proper level adjust, or instrument operation without input level control
• OFF/STDBY/ON switch allows convenient audio muting while transmitter “ON”
• Status LED indicator flashes once for unit “ON”; lights steady for low battery alert
• Single 9V alkaline or NiMH battery
• Lightweight, rugged ABS housing with integral antenna
SPECIFICATIONS
OVERALL SYSTEM PERFORMANCE
RF Carrier Frequencies ............ Selected factory installed frequencies between 740MHz-806MHz
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 variable 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/1000mA
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—GT/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 flashes 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