Tandberg 110 Brochure

Page 1

TANDBERG °UT '"

YAPE SVNC. UNIT "0
SYNC. STAYUS

17;- 814
7"":

153

EX v. REF.

TANDBERG
TAPE SYNC UNIT 110

The Tandberg Instrumentation Tape Recorder Series 100 has a speed accuracy of

I 0.2 70. which is sufficient for nearly all applications. However, some special appli-
cations require an extremely high tape speed accuracy. To fill this requirement, the
Tandberg Tape Sync Unit 110 was developed. Working together with the Series 100
recorder, this unit provides a high quality tape servo system for long term tape speed
stability of: 50 PPM Q 0. 005 70).

Although the tape recorder has its own speed servo which ensures constant angular
velocity of the capstan (capstan sync), the signal wavelength on the tape may have varia-
tions introduced by varying tape tension and stretching of the tape. Such variations
must be compensated by corresponding variations in the playback speed if time base
errors and DC errors in the data output voltage are to be reduced. This particular
speed control problem can be solved with the Tape Sync Unit which compares a recorded
reference signal with the reference source. and provides a speed correction current to
the sync input of the recorder. The internal reference source in the tape sync unit oper-
ates at the centre carrier frequency [or the tape speed in question.

If an external reference is used for playback, it is possible to operate at a speed different
from the one used during recording.

Before recordings are made, it must be decided whether tape sync will be needed during
playback. so that the appropriate reference signal can be recorded together with data.
One channel from the TIR 100 is required [or operation with the Tape Sync Unit 110.

In using channel No. 2 for sync, the advantage of applying flutter compensation during re-
production can take place on the same channel.

TANDBERG

Page 2

The Tape Sync Unit 110 is primarily intended for tape speed control, but it is also
very useful for calibration of the Series 100 recorder as a very accurate crystal
oscillator provides the carrier frequencies which correspond to the selected tape speed.

For centre carrier calibration of modulator and demodulator. the modulator is placed In
phase-locked loop with a reference oscillator, whereas for speed calibration the repro-
duced reference is phase-locked to the reference source via the tape speed servo of the

recorder.

Examples of general applications are:

The data must be reproduced with a very high time bace accuracy.

2. The data signal to be recorded is closely related to a sync signal that will
later be needed for recovery of the data (time-multiplexed signal).

3. The tape speed during recording, or the signal wavelength on the tape is
varying under influence of external speed control or as a result of mechanical
strain, extreme temperatures or poor tape quality.

The application of the Tape Sync Unit 110 does not require any changes to the existing

Series 100 Recorder.

TECHNICAL SPECIFICATIONS

Power requirements:
Temperature range:

Humidity:
Vibration:
Shock:
Altitude:

Internal reference frequency:

Reference stability:

Synchronizer tracking range:

Usable external reference
signal:

Dimensions:

Weight:

Tandbergs Radioiabrikk A/S.

PO. Box 9. Korsvoll,
Oslo 8. Norway.

115/230 v: 10 %, 48 - 1000 Hz. 12 w.

0 to + 55 degrees Centigrade,, operating. - 40 to + 75
degrees Centigrade, nonoperating.

10 % to 95 % (- 25 to+ 40degrees Centigrade). noncondenslng.
0.1" displacement, 5 - 18 Hz. 1.3 g. 18 - 200 Hz.

50 g max. (10 ms. half-sine), nonoperating.

15,000 ft., operating, 25,000 ft., nonoperating.

13500, 6750, and 3375 Hz.

3 50 PPM.

3 2880 degrees at the relevant reference frequency.

Any frequency within the deviation range for the tape
speed in question.

Minimum amplitude : 2.5 V
Maximum amplitude : 10 V
Width 8 1/4" (21 cm). Height 4" (10 cm).
Depth 12 7/8" (15 cm).
3.3 lbs (1.5 kg)
92] - 6 - 72 Primed In Norway