Brenell MINI 8 - Appendices; Alignment Procedures Introduction

appendix ft .
alignment
a 1 INTRODUCTION
e is intended to bring the tape recorder to
(Ref A). It comprises the following procedures.
Al.l The alignment procedur
within the NAB specification
1. Adjusting the REPLAY gain
Adjusting the SYNC gain
2. Adjusting the RECORD head azimuth
3* . Adjusting the REPLAY head azimuth
4, Adjusting the RECORD head rotation
5. Adjusting the REPLAY head rotation
6. Adjusting the REPLAY top frequency response
7. Adjusting the RECORD bias
8. Adjusting the RECORD top frequency response
9. Adjusting the RECORD level
these can only be carried out if a calibration tape is
, or equivalent - see Appendix B) .
e tape recorder according to the NAB
The first seven of
available (BASF Calibration Tape 15,
will align the replay section of the
specification.
replay section.
Al. 3 It must be stressed that the tape recorder is fully aligned during
manufacture and it is extremely unlikely that the major! y o
, . . i. iiiiii he necessary during normal use of this machine -
required if they have been subjec o mec anic RECORD BIAS adjustment
The adjustment likely to be made most f-quentlis the RECORD BIAS^
if a different recording tape is used. Apart from tnis oniy p
on the gains and frequency responses are required.
A 2 PREPARATION
A2.1 Prior to attempting any of the alignment procedures, ensure:
the correct test equipment is available - an AC
(e.g. Levell Tm3B) and an Audio Signal Generator ( .g.
a. that
scaled in dB
200DM)
b. That
c. That
you are thoroughly familiar with the alignment procedure
the correct calibration tape is available
the heads, tape
d. That
and guides daily, before a session starts.
guides, capstan and any tools to be used on
to mounting the calibration tape.
or
In
A2.2 If it is intended to carry
- — of the
terms azimuth and rotation.