Tandberg TPA 3003 Brochure 3

Page 1

Tandberg Series 3000 Separates

Peak Chwmg

Page 2

Tandberg TPT 3001.

Programable Tuner.

The TPT 3001 is the sensitive ear of
the Series 3000. The design aim was
to create a tuner with no compromise -
the world's finest FM tuner. The result
is a signal to noise ratio previously un-
heard oi in an FM tuner. Noise levels oi
better than 90 dB below the signal level
in stereo.

Long term development in the Ultimate Signal to Noise Ratio.

Tandberg laboratories has produced a Like the sensitivity, the ultimate signal

host oi advanced features - including a to noise ratio is determined by the

remarkable stereo decoder that takes component quality and the applied

full advantage oi the excellent front end level of technology in the unit's

signal to noise ratio. circuitry. In the TPT 3001, the extra-
ordinary ultimate signal to noise ratio is
achieved by the unparallelled overall
engineering and design. Intact, the
ultimate signal to noise ratio is limited
only by the laws of physics: that is by
the thermal resistance of the load
impedance of the detector itself. (Fig. 1)

Antenna Voltage Signal/Noise

th/75 ohm 0 dB
léo

100 % mod. Out- 40

put level 2.5 V HMS "7

Wide/Normal -60

Narrow c .7. .. , .

Noise stereo 80

Noise mono , 7,,"

Fig. 1 -100

:1 10 302 l03 10 i105

Sensitivity

The sensitivity of a tuner is determined
by the component quality, the applied
level of technology and the physical
layout of the electronic circuitry. The
highest design skills have gone into the
electronic layout of the TPT 3001 ,
which utilizes metal film resistors and
specially selected transistors and
capacitors.

fl

unity-um u we

\-

Fig. 2 TPT 3001

Stereo Decoder.

Even ii a tuner is excellent for mono-
phonic reception. the distortion in
stereo introduced by the stereo
decoder is often considerably higher
than expected. even if the harmonic
distortion is very low. This is caused by
the intermodulation between the pilot
tone, the subcarrier and the pro-
gramme, creating beat notes at certain
frequencies non harmonic to the pro-
gramme. In tact, reducing the inter-

001!

mm

In»;

Fig. 2 Other high quality tuner

modulation and the beat notes of the
decoder is much more important than
reducing the harmonic distortion,
because the ear is much more sensi-
tive to non harmonic distortion than it is
to harmonics. The TPT 3001 over-
comes this problem and avoids beat
note generation by using discrete com-
ponents of the highest quality in the
signal handling stages. The result is
clearly shown by comparison in Fig, 2.