uher SG 631 Logic, Operating Instructions Manual

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With this switch in MONO MONO 2 or STEREO (quarter-track stereo
operation using Tape Head Assembly Z 412) the full take-up reel may
be exchanged with the empty supply reel for a second tape pass after
the first pass has been completed and tape is completely on the right
(or take-up) reel. In half-track stereo operation only one tape pass is
possible; hence the tape should be rewound onto the left (or supply)
reel once the tape is completely on the take-up reel.
half-track operation slide synchronization may be only monophonic,
but stereophonic in quarter-track operation. The differences between
half-track and quarter-track operation as well as the location of the
control track for slide projector operation are clearly shown in Fig. 4.
Slide synchronization is possible only at the 9.5 or 19 cm/s
or
tape speeds!
3.7 MONITOR Switch ©
This pushbutton is for selecting "off-the-tape" ("B") or "from source" ("A")
as the mode of monitoring during record. It allows the quality of the
recording to be checked acoustically at once, during record, for in "B"
position playback of the signal just recorded is directly off the tape. On
the other hand, with "A" monitoring the signal delivered by the input
source may be heard while it is being recorded on the tape. This direct
comparison of source and tape recording lets differences between the
two be easily recognized.
When the switch is in TAPE position, a green function indicator
lights up while a red illuminated function indicator reflects the
SOURCE monitoring position. Both function indicators are located above
the MONITOR switch.
Fig. 4
3.8 Tape Speed Selector
Turning this switch sets the tape speed at (4.7, 9.5 or cm/s)
ips. As may be seen in the Performing Specifications at the end of the
Operating Instructions, the highest quality demands are fulfilled at the
speed. Note: Operation of automatic slide projectors and multi-
vision projectors is possible only at tape speeds 3% or ips.
3.9
Pressing this key lightly sets the SG 631 LOGIC in record mode, and
setting the record level may be undertaken at once. Make certain that
the tape type selector is in the proper position (see also sec. 3.21).
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