phone adapter cable WA310. If the system is to be connected to the electrical output of a musical instrument, an instrument cable such as the Shure WA302 must be used. IMPORTANT: Other manufacturer�s microphones specified for wireless use are generally not compatible, as supplied, with Shure wireless systems.
� A receiver-to-mixer cable with a 3-pin XLR connector (for bal7 8 9 10 7
anced microphone level EC4 receiver output), or 1/4-inch 2-circuit phone plug on one end (for unbalanced auxiliary level EC4 receiver output), and a mixer input connector on the other. EC4 RECEIVER SETUP AND CONNECTIONS
EC4 RECEIVER FEATURES AND CONTROLS FIGURE 3
1. Place the receiver in its operating position. Avoid placing the receiver near RF noise sources such as light dimmers, computers and other digital devices (e.g., CD players and digital delays). 2. If the receiver is placed on a horizontal surface, attach the four adhesive bumpers to the bottom corners of the receiver. If the receiver is to be rack mounted, remove the screws on each side of the receiver case, position the mounting brackets over the holes, and secure the brackets with the two removed screws and the two supplied screws. 3. Plug the AC adapter into the POWER jack on the rear panel of the receiver. 4. Plug the AC adapter into a 120V, 60 Hz power source. 5. Attach the supplied 1/4-wave antennas to the ANTENNA connectors on the receiver. Make sure they are pointing up and are within the line of sight of the transmitter. Obstructions or reflecting objects will degrade system performance. 6. Attach the audio connecting cable with an XLR connector or a 1/ -inch phone plug on the receiver end between the desired 4 EC4 OUTPUT connector and the mixer or amplifier input. IMPORTANT: Improved diversity receiver performance may be obtained by remotely locating one or both antennas so that they are separated by 1.5 meters (60 inches) or more. Optional Shure WA380 1/2-Wave High-Gain Antennas are recommended for this application. They may be remotely located using one or two Shure WA420 Antenna Cable Kits. If the receiver is to be rack mounted, both antennas must be remotely located or mounted on the front of the rack using the Shure WA440 accessory rack-mount kit. To operate up to four receivers with only two antennas, use the Shure WA404 amplified Antenna/DC Power Distribution System. Transmitter Battery Selection Only two types of batteries are recommended for use with the EC1 and EC2 transmitters: � 9V alkaline batteries (Duracell MN1604 or equivalent).A fresh 9V alkaline battery should provide 7 hours of operation.
1. POWER ON Indicator: This green light glows when the POWER button is turned on. 2. DIVERSITY Signal Indicators: Yellow lighs glow to show usable RF signals from antenna A, antenna B, or both. Normal operation is indicated when either or both lights glow. Note that these lights are not indicators of signal strength, but barely flickering lights may indicate marginally acceptable signals. 3. AUDIO NORMAL Indicator: This green light flashes regularly to show normal audio operation. 4. AUDIO PEAK Indicator: This light glows red to show approaching audio overload condition. Normal operation will cause occasional flashing of this light on loud signals; constant glowing indicates excessive audio level and need to lower transmitter Audio Gain switch or rotary control. 5. VOLUME Rotary Control: Determines signal level at both receiver OUTPUT connectors. 6. POWER On/Off Button: Applies power from the DC power input jack to the receiver circuitry. The green POWER light glows and remains on when power is applied to the receiver. 7. ANTENNA Connectors: UHF type connectors provide connection to 1/4-wave vertical antennas supplied with the EC4, to the coaxial cable in the optional WA420 Antenna Cable Kit, or to the optional 1/2-wave high-gain antennas (WA380). 8. 12 VDC Negative Ground Coaxial POWER Jack: Accepts power from the supplied ac adapter, or from any well filtered 12.5 to 18 Vdc (200 mA) power supply. 9. SQUELCH Screwdriver Control: Automatically quiets or �mutes� the receiver when no transmitter signal is received. This control is factory-set for optimum operation in most applications, but can be adjusted for unusual conditions. See the �EC4 Receiver Squelch Control Adjustment� paragraph. 10. OUTPUT Connectors: XLR connector provides balanced low impedance microphone-level output; 1/4-inch phone jack provides unbalanced auxiliary level output to audio mixer or amplifier. PRE-INSTALLATION REQUIREMENTS Before attempting to install the EC wireless microphone system, make sure you have the following items: � A 9V alkaline battery for the transmitter (Duracell MN1604 or equivalent). A rechargeable, heavy duty 8.4V nickel-cadmium (NiCad) battery may also be used.
� Rechargeable, heavy duty 8.4V nickel-cadmium (NiCad) batteries. NiCad batteries will only provide 1.5 to 2 hours of operation. IMPORTANT: Use only a 9V alkaline battery or a heavy-duty, rechargeable 8.4V NiCad battery. Carbon�zinc and zinc-chloride batteries will not provide sufficient power for proper operation, and are not recommended. EC1 TRANSMITTER SETUP
EC1 Transmitter Battery Installation 1. With the transmitter POWER ON/OFF switch in the OFF position, slide the battery compartment access cover toward the OPEN arrow until the cover pivots open. See Figure 4 below.
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A microphone for the EC1 transmitter�either one designed specifically for the transmitter (such as a Shure WL84 or WL93), or a low impedance dynamic microphone with a micro-
