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Model 280B
Operation
SECTION 3
OPERATION
3.1
GENERAL
Operating controls for the 280B Series tape trans
ports are located on the front panel assembly of the
tape transport mechanism. Operating controls for
the amplifiers are located on the record playback
control panel. The transport pushbuttons contain
lamps
.
to indicate the mode of operation of the
transport.
The control and indicators are illustrated in Figure
3-1.
3.2 TAPE THREADING
Before installing and threading the tape, make sure
that routine procedures for tape path maintenance
have been followed according to the recommended
practice outlined in section 4. Figure 3-2 shows the
tape threading path. Set the TENSION control to
HI for large reels and LO for small reels.
3.3 SELECTING SPEED AND
APPLYING POWER
A.
Tum the POWER switch to on. The STOP
pushbutton and the vu meter lamps light to
indicate that power is on.
B.
Select the desired capstan speed (CAPSTAN
HIGH/LOW switch). The CAPSTAN switch
automatically changes electronic equalization.
~1
Do not change tape speed while
in the Play mode. Damage to the
machine may result.
3.4 PLAYBACK MODE
A.
Thread the recorded tape on the transport.
B.
Set the Monitor switch to PLAYBACK.
C.
Set the Function switch to SAFE.
D.
Press the START pushbutton.
3.5 STOPPING THE UI\IIT
Press the STOP pushbutton to halt tape motion
from any mode. The 280B automatically stops if
the tape breaks or end-of-tape is reached. This is
provided for by the tape-break ann, located on the
righ t side of the tape transport.
3.6 RECORD MODE
A.
Thread the transport with a blank tape or
a tape previously recorded with program
material no longer required.
NOTE
If
the previously
recorded tape was
recorded with a different head config
uration, best results are obtained by
bulk erasing the tape before recording.
B.
Set the Monitor switch to RECORD.
C.
Adjust record level with the RECORD LEVEL
control.
D.
Set the Function switch to RECORD READY
for those channels to be used for recording.
E.
Press the START push button to start tape
motion.
F.
Press the RECORD pushbutton. The indicator
lamp in the RECORD pushbutton lights (red),
but RECORD READY must also be selected
before the RECORD indicator on the amplifier
lights and the transport enters the RECORD
mode.
3-1
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