1. Clean machine
2. De-magnetize (optional - make sure machine is turned OFF)
3. Clean machine again
4. Prepare Record Pad at the END of a new reel if required, head/tail
leadered.
Alignment Procedure:
1. Repro Level
Tone: 1 kHz
Tone Source: Test Tape
Monitor Source: Repro
Purpose: To adjust output of Repro Amp so that 0 dB VU
playback of a 1 kHz signal equals a known level of
magnetism.
185 nW/m2 = 0 dB
250 nW/m2 = +3 dB
320 nW/m2 = +5 dB
370 nW/m2 = +6 dB
2. Sync Level
Tone: 1 kHz
Tone Source: Test Tape
Monitor Source: Sync or Auto
Purpose: To adjust output of Sync Amp so that 0 dB VU playback
of a 1 kHz signal equals a known level of magnetism.
3. Repro High Frequency
Tone: 10 kHz
Tone Source: Test Tape
Monitor Source: Repro
Purpose: To adjust the Repro Amp for flat frequency response
from 1 kHz to 10 kHz and beyond.
4. Sync High Frequency
Tone: 10 kHz
Tone Source: Test Tape
Monitor Source: Sync or Auto
Purpose: To adjust the Sync Amp for flat frequency response
from 1 kHz to 10 kHz and beyond.
5. Repro Low Frequency
Tone: 100 Hz
Tone Source: Test Tape (postpone this step if using MRL tape)
Monitor Source: Repro
Purpose: To adjust the Repro Amp for flat frequency response
from 1 kHz down to 100 Hz and beyond.
6. Sync Low Frequency
Tone: 100 Hz
Tone Source: Test Tape (postpone this step if using MRL tape)
Monitor Source: Sync or Auto
Purpose: To adjust the Sync Amp for flat frequency response
from 1 kHz down to 100 Hz and beyond.
7. Bias/Overbias
Tone: 10 kHz
Tone Source: Oscillator
Monitor Source: Repro while recording
Purpose: To overcome inertia for optimum low amplitude
response. Overbias according to the specifications of
your tape manufacturer.
Purpose: To adjust Input Amp so that a 0 dB VU signal from the
console equals a 0 dB VU input monitor on the tape
machine.
9. Record Level
Tone: 1 kHz
Tone Source: Oscillator
Monitor Source: Repro while recording
Purpose: To adjust Record Amp so that a 0 dB VU signal from
the console records with just enough magnetism that
the tape plays back at 0 dB VU, which was referenced
to the Test Tape in step 1.
10. Record High Frequency
Tone: 10 kHz
Tone Source: Oscillator
Monitor Source: Repro while recording
Purpose: To adjust the Record Amp for flat frequency response
from 1 kHz down to 10 kHz and beyond.
If you skipped steps 5 and 6, do them now while recording 100 Hz from
the console and monitoring the Repro Head.
11. Print Tones (30 seconds each of 1 kHz, 10 kHz, 100 Hz. Head/tail
leadered at beginning of tape.)
