Nady Systems U-81 owner manual System Features, Specifications, Octavo Wireless Receiver

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

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