Shure U4D J4 2-Channel Wireless System with 2 Belt Packs UHF 554-584 Mhz
Shure U4D J4 2-Channel Radio Frequency Receiver UHF 554-584 Megahertz
The receiver is available in either dual or single models that fit into a standard 19 inch (482 mm) equipment rack. An auxiliary unswitched AC output jack allows multiple receivers to be linked “daisy chain” style. The optional UA830 Remote Antenna Kits can be powered by 12 Vdc, 500 mA output provided through the antenna connectors. The optional UA845 Antenna Distribution Amplifier Kits allows connection of multiple receivers using only two antennas.
Features:
- Menu Driven Display: User-programmable receiver display shows Group, Channel, Frequency, Name, Squelch level, and Locked/Unlocked status.
- Exclusive Shure MARCAD Circuitry: MARCAD (Maximum Ratio Combining Audio Diversity) circuitry constantly monitors signals from both receiver sections and combines them in a single output signal. MARCAD provides superior reception and exceptional freedom from dropouts.
- Noise Squelch Circuitry: Analyzes signal quality instead of signal strength. This virtually eliminates the possibility of annoying noise bursts coming through your receiver. Dual RF Level Meters: The U4D receivers have two RF meters, one for each antenna. The dual meters indicate received signal strength at each antenna, and make it easier to identify and troubleshoot “dead spots”.
- Audio Metering: Each receiver includes a seven-segment audio meter that lets you monitor audio level and helps optimize transmitter gain setting.
- Transmitter Display: Shows Group, Channel, Battery Power Level, and POWER LOCK ON/OFF* condition. Both displays are user programmable.
- Tone Key Squelch: Eliminates unwanted noise from entering system; eliminates popping noises when turning the transmitter on or off.
- Dual Receiver Option: Provides greater flexibility while conserving rack space.
- Preconfigured Group/Channel: Ensures frequency compatibility and simplifies system installation.
- Network Expansion Capability: U4S and U4D receivers have a 25-pin serial connector for future computer control and monitoring via an accessory interface box.
- DC/DC Converter: Ensures consistent audio and RF performance, even if battery voltages change
Specifications:
- Actual frequency in megahertz
- Range: 554-584mhz
- Group/Channel
- Performer/system name
- Squelch setting
- Menu lock-out status
- Battery fuel gauge
- 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
Shure U1 J4 Radio Frequency Beltpack Transmitter UHF 554-584 Megahertz
The wireless bodypack transmitter shall operate in the UHF band and shall provide a tone key (32,768 kHz) to increase reliability and to minimize unwanted noise. The system shall allow to change the operating frequency in 25 kHz steps in order to avoid RF interference, enabling up to 47 systems to operate simultaneously in one frequency band. Preconfigured group, channel and frequency setups shall be available to ensure that multiple systems in use do not interfere with one another. The transmitter shall be programmable through a menu as well as infrared synchronization. The transmitter shall provide a threaded connector to securely lock microphones or instrument cables. The backlit LC display shall show name, battery gauge, carrier frequency, as well as gain and sensitivity settings. The LCD menu controls should cover separately adjustable gain (-10 to +20 dB) and input sensitivity (attenuation pad: +15, 0, -10 dB), tunable carrier frequency, switchable RF power, frequency and power lock as well as the access to the RF Safety Mode (transmitter operation with muted RF carrier).
Features:
- Switchable RF Power (10/50mW or 10/100mW, Region Dependent)
- Low Profile, Compact Design
- Frequency and Power Lockout
- Bit-mapped Backlit LCD Display
- 2 AA Batteries – Up to 8 hours Continuous Use
- Automatic Transmitter Setup
- Durable, Light-weight Magnesium Construction
- Removable Bodypack Antenna
Specifications:
- RF Carrier Frequency Range: 554–584 MHz
- Working Range: 152.4 m, minimum, under typical conditions; 487.6 m line of sight
- Audio Frequency Response: 50 to 15,000 Hz, ±2 dB
- Gain Adjustment Range: 0 to 40 dB
- Modulation: ±45 kHz deviation compressor-expander system with pre-and de-emphasis
- RF Power Output: 10 mW maximum
- Dynamic Range: >110 dB, A-weighted
- Image Rejection: 100 dB typical
- 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: Two (2) 1.5V AA alkaline batteries recommended; Nicad batteries optional
- Battery Life (Typical): 12 hours (with Duracell MN1500 1.5V AA alkaline battery)
- Operating Temperature Range: -7° to 49° C
- Overall Dimensions: 92.2 mm L x 64.7 mm W x 24.2 mm D
- Net Weight: 175.2 g without battery
