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11. Increase
its maximum (for 3.5 dB of overbias; see
*When calibrating at 3.75 or 7.5 IPS, the tone generator is at a lower level, therefore meter resolu-
tion is decreased. To increase meter precision when adjusting bias at the lower tape speeds, con-
sider temporarily increasing the reproduce level.
12. Set the
Record Level
Calibration
13. Adjust
(the level depends on tape speed).
Table 11. Meter Levels for Record and HF EQ Adjustments
Tape Speed
Record EQ
14. Set the
Calibration
pends on tape speed).
Table 12. Record HF EQ Calibration Frequencies and Levels
Tape Speed
15. Adjust Record
Meters
speed).
Note:
librate the record level (steps 12, 13).
The manual calibration procedure is complete.
For related information, see the
UAD Powered Plug-Ins Manual
Bias
(clockwise) until the meter level is reduced by –3.5 dB from
Tones
frequency to 1 kHz.
Record
(input) so the
Meter Level
3.75 IPS
–20 dB
7.5 IPS
–10 dB
15 IPS
0 dB
30 IPS
0 dB
Tones
frequency to the value in
Tone Frequency
3.75 IPS
5 kHz*
7.5 IPS
10 kHz
15 IPS
15 kHz
30 IPS
20 kHz
*Note: 7.5 kHz is specified in Ampex manual.
HF EQ
display the level in
If HF EQ is adjusted by a large amount, it may be necessary to reca-
Manual Calibration
Meters
display the level in
Table 12
Tone Level
–16 dB
–6 dB
+4 dB
+4 dB
(not to be confused with
Table 11
above (the level depends on tape
Manual Calibration Notes
- 169 -
Notes).*
Table 11
below
below (the frequency de-
Repro
HF) so the
in the next section.
Chapter 12: Ampex ATR-102
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