Shure - Wireless Systems - U4S and U4D Wireless Receivers

U4S and U4D Wireless Receivers

NOTE: This product has been discontinued. Please see ULX Wireless and UHF-R Wireless.

Again, UHF provides flexibility and performance with two receiver choices, the U4S with a single receiver design, and the U4D, a dual-channel receiver, both featuring Shure's exclusive MARCAD® Diversity circuitry.

(Discontinued) UHF Wireless Single and Dual Channel MARCAD Diversity Receivers with 1/2 Wave Antennas.

Two single-rack space versions:

U4S Single Channel Diversity
U4D Dual Channel Diversity

Easy-to-read, programmable, multi-function LD to set and view:

Actual freqency in megahertz
Group/Channel
Performer/system name
Squelch setting
Menu lock-out status
Battery fuel guage
UHF TV channel (in U.S. and some international versions
RF, audio and diversity metering
Independent headphone monitor
Network extension capability
Switching internal power supply
Two half-wave, flexible rubber antennas
Tone key squelch
Mic/line switch
Five-segment RF level indicators
Seven-segment audio level indicators
XLR connector provides balanced low-impedance mic or line level output
1/4 inch phone plug provides unbalanced high-impedance output
Mic/line slide switch

RF Carrier Frequency Range

554–862 MHz, depending on region

Working Range

U1: 152.4 m (500 ft.) minimum, under typical conditions; 487.6 m (1600 ft.) line of sight

NOTE: Actual working range depends on RF signal absorption, reflection and interference

Audio Frequency Response

50–15,000 Hz, +2 dB.

NOTE: Overall system frequency response depends on the microphone element

Gain Adjustment Range

U1: 0 to 40 dB

U2: 0 to 26 dB

Modulation

+10kHz to +100kHz deviation, depending on region; compressor-expander system with pre- and de-emphasis

RF Power Output

U1, U2: 10 mW maximum

Dynamic Range

>102 dB or >110dB, depending on region; A-weighted

Image Rejection

90 dB typical

RF Sensitivity

Spurious Rejection

75 dB typical

Ultimate Quieting (ref. 45 kHz deviation)

>100 dB, A-weighted

Audio Polarity

Positive pressure on microphone diaphragm (or positive voltage applied to tip of WA302 phone plug) produces positive voltage on pin 2 with respect to pin 3 of low impedance output and the tip of the high impedance 1/4-inch output

System Distortion (ref. +45 kHz deviation, 1 kHz modulation)

0.3% Total Harmonic Distortion typical

Power Requirements

U1, U2: 1.5V AA alkaline battery; Nicad optional

U4: 90 to 230 Vac, 50/60 Hz

Power Consumption

U4S: 9.6 W min., 13.2 W max.

U4D: 12 W min.,16 W max.

Battery Life (Typical)

U1, U2: 12 hours

Operating Temperature Range

–20° to 50° C (–4° to 122° F)