Audio-Technica U891RC User's Manual
Contents
1. U891RC Cardioid Condenser Boundary Microphone with Local or Remote Switching Features e Electronic switch can be set to any of three operating modes touch on touch off touch to talk and touch to mute External contact closure capability permits control of remote devices from microphone switch External LED control allows for accurate depiction of the live status of the microphone PivotPoint rotating output connector allows cable to exit from either the rear or the bottom of the microphone UniGuard RFl shielding technology offers outstanding rejection of radio frequency interference RFI UniSteep filter provides a steep low frequency attenuation to improve sound pickup without affecting voice quality Available interchangeable elements permit angle of acceptance from 100 to 360 e Heavy die cast case and non slip silicon foam bottom pads minimize coupling of surface vibration to the microphone Description The U891RC is a wide range condenser microphone with a cardioid polar pattern It is designed for surface mount applications such as high quality sound reinforcement conferencing distance learning and other demanding sound pickup applications The microphone features an ultra quiet electronic touch switch programmable external contact closure and LED indicator The electronic touch switch can be set to any of three operating modes touch on touch off touch to talk and touch to2. UniSteep filter provides easy switching from a flat frequency response to a low end roll off The roll off position reduces the pickup of low frequency ambient noise such as traffic aithandling systems etc room reverberation and mechanically coupled vibrations To engage the UniSteep filter slide the switch toward the bent line The microphone s PivotPoint rotating output connector allows the cable to exit from either the rear or the bottom of the microphone without the need for tools or disassembly Avoid leaving the microphone in the open sun or in areas where temperatures exceed 110 F 43 C for extended periods Extremely high humidity should also be avoided 221 U891RC Note Audio Technica has developed a special RFI shielding mechanism which is an integral part of the connectors in the UniPoint line If you remove or replace the connector you may adversely affect the unit s RFI immunity Audio Technica offers a crimp tool ATCT and RFI shields that enable you to shorten the cable and correctly reinstall the connector while maintaining the highest level of RFI immunity Note Placing any object on a surface such as a conference table before its finish is fully cured may result in damage to the finish Architect s and Engineer s Specifications The microphone shall be a fixed charge condenser designed for use in surface mount applications It shall have a cardioid polar pattern with a unifo
3. Weight shall be 266 grams 9 4 oz The microphone shall be housed in a die cast case with a perforated steel grille Finish shall be low reflectance black The microphone shall include a soft protective pouch The Audio Technica U891RC is specified Switch Settings and Functions CONTROL Switch in Local Position SW Setting Microphone Audio LED External Contact Closure TOUCH ON OFF Follows touch sensitive switch Follows touch sensitive switch Follows touch sensitive switch MOM ON On when switch On when switch Closed when switch E EE is pressed Jis pressed is pressed MOM OFF Off when switch Off when switch Open when switch is pressed is pressed is pressed CONTROL Switch in Remote Position SW Setting Microphone Audio LED External Contact Closure TOUCH ON OFF Always On Follows touch Follows touch basissen Sensitive switch sensitive switeh MOM ON Always On On when switch Closed when switch MOM OFF Always On Off when switch Open when switch is pressed is pressed CONTROL Switch in LED Remote Position SW Setting Microphone Audio LED External Contact Closure TOUCH ON OFF Always On Remotely controlled Follows touch a eeaeee SEOSHVE switch MOM ON Always On Remotely controlled Closed when switch So tee a a a aae a a I aa MOM OFF Always On Remotely controlled Open when switch is pressed Specification
4. mute The microphone s external contact closure capability permits control of remote devices The contact closure can also be configured to operate independently of the microphone element for applications that require a constant signal from the microphone element A switch on the bottom of the microphone allows selection of local or remote operation In remote operation the LED and electronic touch switch operate independently of the microphone A third position on this switch enables the LED to be controlled from an external source The microphone requires 11V to 52V phantom power for operation The microphone is equipped with UniGuard RFl shielding technology which offers outstanding rejection of radio frequency interference RFI The microphone s cardioid polar pattern provides a 120 angle of acceptance cardioid in hemisphere above mounting surface Additional interchangeable elements with omnidirectional 360 and hypercardioid 100 pickup patterns are available The microphone includes a 76 m 25 output cable terminating in a special TA5Ftype connector at the microphone end The equipment end is stripped and tinned for connection to an electronic device The microphone is equipped with Audio Technica s unique PivotPoint rotating output connector unipoint microphones A switch permits choice of flat response or low frequency roll off via integral 80 Hz high pass UniSteep filter to help control unde
5. he operation of the touch switch when in the local mode For applications that require the microphone to remain active or always on regardless of the touch switch setting a Local Remote LED Remote control function is provided e When the CONTROL switch located on the bottom of the microphone is in the Local position the touch switch controls the microphone s audio output LED status and contact closure internally e When the CONTROL switch is in the Remote position the microphone s audio output remains active or on all the time The touch switch controls only the LED and contact closure e When the CONTROL switch is in the LED remote position it allows remote control of the LED for accurate depiction of the microphone s live status The LED will remain on when driven logic high or open and off when driven logic low or connected to ground The microphone s audio output remains active or on all the time and the contact closure follows the configuration of the touch switch Refer to the table for switch LED closure states Output is low impedance balanced The signal appears across the red and yellow wires audio ground is the shield connection Output is phased so that positive acoustic pressure produces positive voltage on the yellow wire The small diameter black and blue wires are the contact closure The white wire is the external LED control An integral 80 Hz high pass
6. off 266 g 9 4 oz 108 0 mm 4 25 maximum length 84 0 mm 3 31 maximum width 23 0 mm 0 91 maximum height TB5M type 7 6 m 25 0 long 3 2 mm 0 13 diameter 5 conductor shielded cable 2 conductors under shield 3 control wires outside shield TA5F type connector at microphone end output end stripped and tinned for connection to electronic device UE O omnidirectional 360 UE H hypercardioid 100 Soft protective pouch 20mm O 3 BK GND WH LED CONTROL BL CONTACT CLOSURE RD COLD YL HOT SH GND audio technica Audio Technica U S Inc 1221 Commerce Drive Stow Ohio 44224 Audio Technica Limited Old Lane Leeds LS11 8AG England 2010 Audio Technica U S Inc audio technica com 0001 0111 01
7. rm 120 angle of acceptance cardioid in hemisphere above mounting surface and a frequency response of 30 Hz to 20 000 Hz It shall be capable of accepting optional interchangeable elements for additional polar patterns It shall operate from an external 11V to 52V DC phantom power source The microphone shall be capable of handling sound input levels up to 130 dB with a dynamic range of 104 dB Nominal open circuit output voltage shall be 19 9 mV at 1V 1 Pascal Output shall be low impedance balanced 200 ohms It shall offer outstanding rejection of radio frequency interference RFI The microphone shall feature a touch sensitive on off switch indicator LED and an external contact closure output for controlling remote devices The microphone shall offer three choices of switching modes touch on touch off momentary on momentary off A three position Local Remote LED Remote control function switch shall be provided on the microphone The output of the microphone shall be aTB5M type connector A 7 6 m 25 miniature output cable with a TA5Ftype connector at microphone end shall be supplied The output end of the cable shall have stripped and tinned color coded leads for connections The microphone shall include a switch to permit choice of flat response or 80 Hz low frequency roll off The microphone shall have a maximum width of 84 0 mm 3 31 a maximum length of 108 0 mm 4 25 and a maximum height of 23 0 mm 0 91
8. s Element Polar pattern Frequency response Low frequency roll off Open circuit sensitivity Impedance Maximum input sound level Dynamic range typical Signal to noise ratio Phantom power requirements Switches Weight Dimensions Output connector Cable Optional interchangeable elements Accessory furnished In the interest of standards development A T U S offers full details on its test methods to other industry professionals on request 1 Pascal 10 dynes cm2 10 microbars 94 dB SPL 1 Typical A weighted using Audio Precision System One Specifications are subject to change without notice requency response 30 20 000 Hz 31 a 5 Response in dB 50 100 200 500 Ik 2 5 Frequency in Hertz 12 or more on axis 10k 20k LEGEND Roll off polar pattern ad BRHZ vee SCALE IS 5 DECIBELS PER DIVISION 8kHz Fixed charge back plate permanently polarized condenser Half cardioid cardioid in hemisphere above mounting surface 30 20 000 Hz 80 Hz 18 dB octave 34 dB 19 9 mV re 1V at 1 Pa 200 ohms 130 dB SPL 1 kHz at 1 T H D 104 dB 1 kHz at Max SPL 68 dB 1 kHz at 1 Pa 11 52V DC 4 mA typical Touch sensitive control on off Switch function touch on off momentary on momentary off Control local remote LED remote Flat roll
9. sired ambient noise The microphone s heavy die cast case and non slip silicon foam bottom pads minimize coupling of surface vibration to the microphone The microphone includes a soft protective pouch and features a low reflectance black finish Installation and Operation The U891RC requires 11V to 52V phantom power for operation The electronics in the microphone take up to 30 seconds to stabilize after power is applied during this start up period some sonic disturbances may be heard upon switching if the system is live The microphone should be placed on a flat unobstructed mounting surface with the front Pa of the microphone facing the sound source 60 y The sound source should not be below WORKING or higher than 60 above the plane of the mounting surface tts 4 The microphone features a touch sensitive on off switch indicator LED and external contact closure ability for controlling remote devices The microphone offers three choices of switching modes The SW FUNCTION switch located on the bottom of the microphone selects the desired mode TOUCH ON OFF Touch the on off switch once to turn the microphone on touch again to turn off MOM ON momentary on Microphone is on only while the switch is being touched press to talk MOM OFF momentary off Microphone is off only while the switch is being touched press to mute The indicator LED and external contact closure follow t
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