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Manual
Calibration Tools
modeled Magnetic Reference Laboratory (MRL) alignment tapes.
Note:
is set to Sync or Repro. Additionally, the tools may not operate in some hosts
unless audio is present on the track containing the plug-in and the transport is
running. Placing the plug-in on an aux, bus, or master output may eliminate
this host limitation.
This section describes the functions of the manual calibration tools. For instruc-
tions on how to use the tools to perform a manual system calibration, see the
"Manual Calibration Procedure" on page
Alignment tapes are carefully recorded with accurate and consistent flux lev-
About MRL
Alignment Tapes
els and test tone frequencies. They are constant companions to all well-main-
tained professional tape machines. Different alignment tapes are required for
each tape speed, head width, equalization standard (CCIR/IEC or NAB),
and fluxivity level.
Alignment tapes are required for system calibration and adjustment so that
playback of previously-recorded session tapes will have correct and consis-
tent equalization and levels, regardless of when, or where, the session tape
was originally recorded.
After tape playback system EQ and levels are calibrated to match the
known-to-be-correct values of the alignment tape(s), the record-side alignment
is performed. The entire record/playback system will then have proper EQ
and gain structuring.
Magnetic Reference Laboratory ("MRL") is a company that produces align-
ment tapes. The MRL tapes used in the UAD Ampex ATR-102 are fringing
compensated. In-depth discussions about fringing compensation and system
alignment are beyond the scope of this manual; thorough resources are avail-
able from the MRL website at:
UAD Powered Plug-Ins Manual
These controls are the suite of tools included to perform
manual calibration of the recorder. These UAD-only
tools are not in the original hardware. Manual calibra-
tion is entirely optional, as the
quickly and automatically calibrate the system.
The manual calibration tools consist of an "external"
tone generator with multiple test tones and levels, a dis-
tortion meter with digital readouts, and a full suite of
The Manual Calibration Tools are operational only when
167.
http://www.mrltapes.com
- 165 -
Auto Cal
feature can
Path Select
Chapter 12: Ampex ATR-102
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