Universal Audio Ampex ATR-102 Manual page 42

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
level depends on tape speed).
Table 4. Meter Levels for Record and HF EQ Adjustments
Tape Speed
Record EQ 14. Set the
Calibration
pends on tape speed).
Table 5. 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 5
Tone Level
–16 dB
–6 dB
+4 dB
+4 dB
(not to be confused with
Table 4 above (the level depends on tape
Manual Calibration Notes
- 42 -
Notes).*
Table 4 below (the
below (the frequency de-
Repro HF) so the
in the next section.
Chapter 2: Ampex ATR-102