UAD Powered Plug-Ins Manual v7.1 - Universal Audio

Secondary Controls
The secondary controls (Figure 4 below) adjust the various
calibration, ancillary noise, tone generator, and tape delay
parameters. The secondary controls panel is accessed by
clicking the OPEN button beneath the AMPEX label.
Figure 4. UAD Ampex ATR-102 secondary controls
Auto Cal
The Ampex ATR-102 has individual calibration controls for adjusting
sync (record) EQ, reproduction (playback) EQ, and
record bias, which are used to compensate for the inherent
non-linearities of tape systems. On the hardware, these controls
are typically adjusted to calibrate the system for optimum response compensation
due to tape non-linearities whenever the tape type, tape speed, emphasis
EQ, or head width are changed.
When the Auto Cal (Automatic Calibration) ON button is clicked, the calibration
EQ and bias controls are automatically adjusted to their “flat” calibrated
position for the currently active Tape Type, Tape Speed, Emphasis EQ, and
Head Type. The Auto Cal ON LED illuminates green when the calibration parameters
(Shelf EQ, HF EQ, Repro HF, Repro LF, and Bias) are in their calibrated
position.
Auto Cal is enabled by default. When Auto Cal is ON, the calibration parameters
(Shelf EQ, HF EQ, Repro HF, Repro LF, and Bias) change values
whenever Tape Type, Tape Speed, Emphasis EQ, or Head Type is modified.
When Auto Cal is OFF, the calibration parameters do not change values
when Tape Type, Tape Speed, Emphasis EQ, or Head Type is modified.
Important: Any calibration settings made manually are lost when Auto Cal
is activated. Consider saving manual settings as a preset before activating
Auto Cal.
UAD Powered Plug-Ins Manual - 32 - Chapter 2: Ampex ATR-102