Related Manuals for True PRECISION 8i
Summary of Contents for True PRECISION 8i
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Page 1: Operation Manual
TRUE systems PRECISION 8i 8-CHANNEL PRECISION MICROPHONE PREAMPLIFIER with M/S decoding and Direct Inputs OPERATION MANUAL Version 1.2... -
Page 2: Safety And Operating Precautions
SAFETY and OPERATING PRECAUTIONS Important Information: This symbol indicates the presence of dangerous voltage within the product enclosure that presents the risk of electric shock injury. When this symbol appears next to an operation discussed in this manual, only qualified technical personnel should perform that operation. -
Page 3: Certifications
CERTIFICATIONS Declaration of Conformity – CE Sunrise Engineering and Design Inc. hereby declares the TRUE Systems PRECISION 8i 8-channel microphone preamplifier to be in material conformity with the following directives and related standards: 73/23/EEC – Low Voltage Directive 89/336/EEC – EMC Directive ... -
Page 4: Table Of Contents
PRECISION 8i OPERATION MANUAL CONTENTS SAFETY and OPERATING PRECAUTIONS CERTIFICATIONS Owner’ s Record Table of Contents INTRODUCTION PRODUCT OVERVIEW UP-AND-RUNNING IN A HURRY INSTALLATION Unpacking and Inspection Mounting Ventilation OPERATION Connections AC Mains Connection Output Cable Connection Microphone Cable Connection... -
Page 5: Introduction
Dual output connections provide easy interconnection as well as the ability to act as a mic splitter. PRECISION 8i is ideal for location recording due to its compact, 1U rack size, 8- channel format, useful level metering and easy interconnect. The integral M/S decoder provides creative spatial image control and can be particularly useful in attaining an exciting stereo image with minimum effort and microphone re-positioning. -
Page 6: Up-And-Running In A Hurry
2. Set buttons as appropriate. 3. Adjust DI-1 or DI-2 Gain controls for adequate signal level as indicated on the PRECISION 8i level indicators or on the level indicators of the device to which it is connected. If you’ re using the M/S Decoder: 1. -
Page 7: Installation
INSTALLATION Unpacking and Inspection We recommend that you inspect your PRECISION 8i upon unpacking it from the factory shipping carton. In the unlikely event that the unit exhibits any physical damage, DO NOT connect it to the AC mains power, but contact your dealer immediately. -
Page 8: Mounting
Fuse Drawer 1 . It is important that the voltage is set correctly for both safety reasons and to insure that the PRECISION 8i will operate according to specifications. Note also that the correct fuse type must be used. See Table below. Product damage caused by incorrect voltage settings or fuse selections cannot be covered under warranty. - Page 9 PRECISION 8i OPERATION MANUAL To change the AC operating voltage selection: This procedure should be performed only by qualified technical personnel. If you are not qualified, please consult TRUE Systems or your dealer for assistance. 1) Using an appropriate AC voltmeter, measure the AC line voltage at the installation site.
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Page 10: Output Cable Connection
When connecting an output of the PRECISION 8i to an unbalanced input, you must connect the negative signal pin (pin 3 of the XLR or “ ring” of the TRS) to the shield. Failure to do this will result in audible distortion. -
Page 11: Microphone Cable Connection
Please TURN OFF phantom power and turn down the gain prior to connecting or re-patching microphone inputs routed through a patch bay. Failure to do so may result in transients that can damage the PRECISION 8i or equipment that is connected to its outputs-not to mention your ears! Electric Instrument Connection: Dual-purpose input connectors 5 are available on channels 7 and 8. -
Page 12: Front Panel Controls
Depress RESET 10 to clear OL. Peak-Hold indicators. These are provided to help optimize level setting when the PRECISION 8i is remotely located from the device to which it is connected. The PK indicator activates (and holds) at the level selected on the PEAK REFERENCE... - Page 13 PEAK REFERENCE switch. Note that the overload level of the PRECISION 8i is +31dBu at the output. This level exceeds the input capability of some devices (check manufacturer’ s specifications).
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Page 14: More About M/S Decoding
AC power indicator. The green power LED indicates that the unit is on. More About M-S Decoding: M-S (Mid-Side) decoding is a particularly creative feature of the PRECISION 8i. While the M-S microphone technique has been around for many years, the opportunity to use it is frequently limited by the need for specialty microphones and/or decoders. - Page 15 This mode can be helpful in live sound and recording applications where the PRECISION 8i is remotely located from the device(s) to which it is connected. Jumpers inside the unit select this optional mode. If you wish to configure the unit for this mode, proceed as follows: WARNING - ELECTRIC SHOCK HAZARD.
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Page 16: Design Approach
PRECISION 8i OPERATION MANUAL DESIGN APPROACH PRECISION 8i features a high-voltage composite architecture with discrete devices plus integrated circuits. The totally balanced, dual servo, dc-coupled design provides exceptional transient response, headroom, imaging and noise performance. Critical devices have been selected on the basis of extensive listening tests as well as engineering tests. -
Page 17: Troubleshooting
PRECISION 8i OPERATION MANUAL TROUBLESHOOTING Solution Symptom Check AC power source and cord. No signal output. Main power switch Check fuses (pull fuse drawer next to power is on, but no LED’ s are illuminated. cord inlet) Check status of phantom power. -
Page 18: Registration And Warranty
REGISTRATION and WARRANTY Don’ t forget to register your PRECISION 8i by filling out the enclosed Registration Card and returning it to us. This allows TRUE Systems to contact you regarding any updates, upgrades or applications information that may become available. -
Page 19: Service And Support Information
SERVICE INFORMATION Other than cleaning the exterior surfaces of your PRECISION 8i and occasional inspection of the AC power cord and audio cables for damage, no maintenance procedures should be attempted by the user. Cleaning can be performed using a lint- free cloth dampened with Windex.