Phase Linear 1000 Owners Manual

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Phase Linear Model 1000

Autocorrelator Noise Reduction System

You have just purchased the most advanced and most versatile noise reduction and dynamic
range recovery system available. Proper use of your Phase Linear 1000 will allow you to
reproduce music with less noise and greater dynamic range than previously thought possible. We
hope you will read this manual thoroughly in order to appreciate all the benefits of the 1000.

Recording studios and record processing companies employ a number of "necessarily evil"
techniques brought about by the state of the recording art. Taken together, these techniques may
be described as processes which serve to limit and restrict the dynamic range of recorded
material. Unfortunately, their use is necessary in order to put the tremendous dynamic range of
live music onto the surface of modern phonograph discs and tapes. When used properly, the
Phase Linear 1000 will significantly correct these shortcomings inherent in the recording process.

Before leaving our factory your Phase Linear 1000 was tested and certified to be in perfect
operating condition. This manual has been prepared to help you operate your Phase Linear as

well as keep it in perfect condition. Your Phase Linear when used with care befitting all fine
instruments, is capable of truly providing a lifetime of musical fulfillment.

CONNECTIONS

1. Check front panel to insure:
a. The power switch is in the off position.
b. The 1000s tape switch is in the source position (out).

2. Connect tape output on your receiver (preamp) to the input on the 1000 and connect the
1000s outputs to your receivers (preamp) tape input jacks.

3. Plug in the 1000s AC cord while leaving the unit turned off.

4. Turn on your receiver (preamp), and then turn on the 1000.

5. The tape monitor on your receiver or preamp should be in the monitor position.

6. Refer to the Operating Instructions for correct operation and adjustment of the Correlator and
Peak Unlimiter circuits.

AUXILIARY EQUIPMENT

Outboard units such as Dolby or DBX may be used with your 1000 but the 1000 must be placed
after" the units in the signal path and before any equalizer in signal path, or as shown.

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CONNECTION DIAGRAM

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CONNECTION DIAGRAM

Any source played through the 1000 will be processed. It is not necessary, therefore, to process
a signal prior to recording since it will be processed on playback. However, if you wish to make a
tape to be played back on another system, simply install the 1000 between source and the tape
recorder.

Note: It is not advisable to use the Expander during recording since it will stress the recorders
dynamic range capability.

FRONT PANEL CONTROLS

Unlimit Threshold Lamp: Provides visual indication of peak unlimit operation. This lamp should
come on during the peaks in the program material but should not stay on all the time.

Unlimit Threshold: Rotate clockwise to increase dynamic range of program material. Adjust so
that unlimit indicator lamp illuminates on peaks and extinguishes between musical peaks. This
knob adjusts both the peak unlimiter and the downward expander.

Low Frequency Calibration: Adjusts low frequency noise reduction. Once this is adjusted
properly it should not be changed unless your cartridge or turntable is changed. An incorrect
setting of this control will cause a loss of bass response. (See Operating Instructions)

Correlation Threshold: Rotate counterclockwise to remove noise from program material.
Correct adjustment is indicated by absence of random hiss and presence of all high frequencies
associated with the musical program. Incorrect adjustment is indicated by complete loss of high
frequencies or by presence of noise in the program. Typically, proper settings are found in the
eleven to three oclock positions though this setting will vary with the source material.

Power Indicator: Illuminates when unit is on.

Power: Press in to turn unit on.