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Aphex 207D Скачать руководство пользователя страница 2

207d

instruction Manual

Aphex Systems Ltd. Model 207D

Page 2

207d

2-ch tube mic preamp with adc

Page 3

Aphex Systems Ltd. Model 207D

Copyright 2001 by Aphex Systems, LTD. All rights reserved. All Aphex products are trademarks or registered trademarks of Aphex Systems,

LTD. Other brand and product names are trademarks or registered trademarks of their respective holders.

A MESSAGE FROM THE PRESIDENT

Dear Aphex Customer,

We are pleased to present the Model 207D Tube Microphone and Instrument Preamplifier with analog and digital
outputs. This continues the commitment made in all the products in our Solution Delivery Series- high performance audio;
extensive, useful and unique features; attractive and clean front panel design; and cost effective pricing.

Rather than being locked into a channel strip that has many functions but does few or none well, the Model 207D gets
you the best possible preamplifier and the freedom to choose the best processing for your application. Loop the output
of the processing back into the insert of the 207D and you have a complete front end without any compromises.

As with all our products, we are very proud of the ingenuity of design and the manufacturing quality of the Model 207D.
We love to hear from you, our customers, about your experiences with any of our products. Our customer support is
unmatched in the industry, so please do not hesitate to contact us.

Sincerely,

Marvin Caesar

Safety Declarations

CAUTION:

For protection against electric shock, do not remove the cover. No user serviceable parts inside.

WARNING:

This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to

Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when
the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the operating guide, may cause interference to radio communica-
tions. Operation of this equipment in a residential area is likely to cause interference in which case the user will be required
to correct the interference at his own expense.

The user is cautioned that changes and modifications made to the equipment without approval of the manufacturer could
void the user’s authority to operate this equipment.

It is suggested that the user use only shielded and grounded cables to ensure compliance with FCC Rules.

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Содержание 207D

Страница 1: ...ems Ltd 11068 Randall St Sun Valley CA 91352 USA S Y S T E M S two channel tube mic And Instrument preamplier Solution Delivery Series Copyright 2004 Aphex Systems Ltd All rights reserved Produced by...

Страница 2: ...and the manufacturing quality of the Model 207D We love to hear from you our customers about your experiences with any of our products Our customer support is unmatched in the industry so please do no...

Страница 3: ...Power 4 3 2 Using the Polarity Switch 4 3 3 Using the Pad 4 3 4 Using Low Cut 4 3 5 Using MicLim 4 4 Using Word Clock 4 4 1 External WC 4 4 2 Internal WC 4 5 Using Digital Audio S PDIF Output 4 6 Repl...

Страница 4: ...llows you to insert any kind of line level equip ment into the signal path between the 207D s front end preamps mic and instrument and tube output stage The operating level at this jack is in the vici...

Страница 5: ...oise floor of the 207 That will result in a very poor signal to noise ratio Always use the most gain possible in the 207 and adjust your mixer s fader or line input gain to accept it and never feed a...

Страница 6: ...received high acclaim among some of the world s top sound engineers Meanwhile our Model 107 remained a solid prod uct in the marketplace because of its low cost high 2 0 Introduction performance and v...

Страница 7: ...d expensive d c operated sealed bifurcated gold contact relays to switch these functions These relays never oxidize and can remain stationary for many years without contact distortion Next let s look...

Страница 8: ...TCHED 48V PHANTOM POWER POLARITY PAD MiCLiM LDR DISCRETE NPN FRONT END LOW CUT FILTER 1 4 TRS PHONE INSERT JACK MiCLiM CONTROL RPA DISCRETE TUBE AMPLIFIER OUTPUT HEADROOM METER DRIVER OPERATING LEVEL...

Страница 9: ...end stage and the tube output stage This is clearly shown in the 207D s block diagram at left The inter connect is unbalanced by way of a stereo TRS I O jack on the rear panel You will need a conventi...

Страница 10: ...is assumed that the user will likely intermix home hi fi equipment such as cassette decks and CD play ers Most professional recording gear and live sound equipment operates at 4dBu 3 9 OUTPUT TRIM In...

Страница 11: ...t active pickups piezo and otherwise are most suited to a 1 megohm impedance at the amplifier input Since we wanted to design the Model 207D to meet the widest requirements we gave it a 1 megohm input...

Страница 12: ...Using the 207D interfering with the audio signal carried on the same wires The industry standard phantom power source is posi tive 48 volts d c supplied to pins 2 and 3 through precision low noise 6...

Страница 13: ...r possible Even though it is outstanding as a rumble fixer you will notice its presence We suggest as a matter of good practice that you always try isolating the mic from unwanted vibrations instead o...

Страница 14: ...ould first double check this setting The Model 207D does not source out its internal word clock so you won t be able to use it for a master clock 4 4 3 Multiple 207D Clocking If several 207D s are to...

Страница 15: ...preamps require a lot of circuitry that just won t fit inside Let s not forget too that a really great mic preamp requires its own ingenious circuitry and design It is not surpris ing that of all the...

Страница 16: ...ording we believe you will truly appreciate the outstanding performance benefits afforded by the Model 207D their work The low noise and highly detailed open sound of the 207D delivers breathtaking re...

Страница 17: ...7 Aphex Systems Ltd Model 207D Distance X 3X Stage Figure 4 4 SPACED PAIR 3 to 1 TECHNIQUE Stage Figure 4 6 M S TECHNIQUE Cardioid Mid Bi Directional Sides Figure 4 5 X Y TECHNIQUE Stage Cardioid Mics...

Страница 18: ...ting from accident misuse abuse neglect unauthorized product modification or failure to follow instructions contained in the User s Manual 3 Resulting from repair or attempted repair by anyone not aut...

Страница 19: ...us OUTPUT TRIM loss Same Same Same Same infinity to 38dB minus OUTPUT TRIM loss AUDIO Frequency Response EIN Crosstalk THD Tube Type 0 0 5dB 30Hz 30KHz 129dBu Input Shorted 10Hz 22kHz 79dB or better 1...

Страница 20: ...gnal before any amplification to prevent input overload The input stage shall be transformerless and actively balanced The preamplified microphone signal shall be sent through an INSERT jack to the ou...

Страница 21: ...tutorial will teach you about the principles of balanced and unbalanced lines wiring standards and how to effectively interface them Standards Professional audio equipment usually comes equipped with...

Страница 22: ...nds The principle is that the outer shield conductor shields the inner conductor from induced noises This can only work well if the cable is relatively short and the ground at each end of the cable is...

Страница 23: ...u re on the same leg by measuring the ac voltage between the hot slots of the different outlets you ve chosen It should be very low or zero That will remedy 50 percent of the cases 6 0 Appendices Chec...

Страница 24: ...he picture The standard for terminat ing ground is Pin 1 Sleeve But which ground It could be connected to audio signal ground or chassis ground depending on the method of grounding used by the equipme...

Страница 25: ...ECTOR WIRING STANDARDS 3 Pin XLR 1 4 TRS Phone Standard Wiring Convention Balanced Pin 1 Sleeve Ground Shield Earth Screen Pin 2 Tip Positive Signal High Hot Pin 3 Ring Negative Signal Reference Retur...

Страница 26: ...nd of balanced output you are dealing with Simply treat it generically Appendices PART 1 BALANCED OUT to BALANCED IN OK for Microphones Standard store bought cable Shield grounded at both ends Positiv...

Страница 27: ...PLIFIED SCHEMATIC Voltage Balanced Outputs Used on the 207 Mono Phone Plug Female XLR SIMPLIFIED SCHEMATIC Don t Ground or Connect Pin 3 Ground Pin 3 Directly to Pin 1 Alternatively Carry Pin 3 Throug...

Страница 28: ...4 UNBALANCED OUT to BALANCED IN Mono TS Phone Plug Stereo TRS Phone Plug Standard Method Standard Cable Guitar Cord Mono TS Phone Plug Stereo TRS Phone Plug Enhanced Method Pseudo Balanced Advantage R...

Страница 29: ...ice This product is protected under one or more of the following Aphex patents 4 578 648 4 633 501 4 843 626 4 939 471 5 115 471 5 155 769 5 334 947 5 359 665 5 422 602 5 424 488 5 450 034 5 463 695 5...

Страница 30: ...20 7d instruction Manual Aphex Systems Ltd Model 207D Page 30...

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