Infrared receiver HDI 234
1. Open battery compartment as in figure 1 and insert battery.
2. Switch on the headphones by means of the switch 1.
3. Set selector switch 2 to middle position. With this switch the receiver
can be set for three different modes of operation: Position 1 = channell,
middle position = stereo, position 2 = channellL Ifthe receiver isto be
used inconjunction with the transmitter SI 234 and, for example, astereo
music centre, the selector switch should be placed inthe middle position.
With single-chan neIor two-channel mono transmission systems one has
the choice between channell and channellL
4. Switch "HiDyn" selector switch 4 to the position "HiDyn" -on. When
using non - "HiDyn" transmitters (e. g. SI 434) the switch must be set to
the "HiDyn" -off position.
5. Select the desired volume by means of the volume controls 3. Red
knob = right channel, yellow knob = left channeL
6. Wear the receiver with the receiving diode 5 pointing towards the front
(figure 2).
General
Invisible infrared light is emitted not only by your transmitter but also by
natural light sources such as the sun and other artificial sources such as
lamps, heaters etc. Perfect sound transmission is dependent on the
amount of power radiated by the transmitter, the size of the room and the
ratio of emitted power to the interference light in the transmission area.
Interference-free infrared transmission with the transmitter SI 234 can be
expected when the living-room in question is no larger than 24 m2,light
conditions are normal and the transmitter and receiver are pointing atone
another.Iftheroomislarger,aslaveradiatorSZI234canbeusedin -
addition to the SI 234. This additional radiator with its own power supply
unit is connected to the SI 234 via the 75 m long connecting cable
GZL 434-6.
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Fault check-list
Fault
Onlystronghissingnoisecan
be heard
Despite the volume controls
being at a high setting, no signal
is audible
Distortion
Slight hissing
Very little dynamic
Cau5e
a) Transmitter not yet switched on
b) Transmitter faulty
(possibly mains fuse)
a) Transmitter not modulated,
L e. audio signal is not present
b) Battery in the receiver is empty
Receiver battery running low
Transmitter SI 234 not properly
positioned
"HiDyn" switch in "Off" position.
HDI234
Frequencyresponse
Modulation. . . . .
Carrierfrequency . . .
Peakswing/nominalsWing
Oeemphasis.
Acousticalsystem. . ....
Olstortlonat 1000Hzandnominalswing
Operatingvoltage. ... .
Max.operatingtimewithonebattery
and mediumvolume.
Weight . .
Couplingtothe ear.
Max.voiumelevel.
Colour
51234
Frequency response
Modulation. ..
Camer frequencles .
Peak sWing/nominal swing.
Preemphasis .
Input voltage tor nominal sWing. .
Oistortion at 1000 Hz and nominal swing
S/N ratio wlth "HiOyn" and HOl 234.
Operating voltage.
Weight
20-20000 Hz
FM
95 kHz/250 kHz
:f: 50 kHz/:f: 35 kHz
50 I'sec.
dynamic transducer
<1%
9-V-Battery IEC6 F22
approx. 50. h
approx. 395 g
crrcumaural
approx. 110 dB
black
20- 20000 Hz
FM
95 kHz/ 250 kHz
:f: 50 kHz/:f: 35 kHz
50 I'sec.
ISV
<1%
85 dB (A)
220 V/ 50-60 Hz, approx. 10 W
transmitter: approx. 260 g
power supply unit: approx. 320 g
10
