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 If the receiver is to be used in conjunction with the transmitter SI 234 and, for example, a stereo music centre, the selector switch should be placed in the middle position. With single-chan ne I or 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 at one

another. Ifthe room is larger,a slave radiatorSZI 234 can be used in -

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.

Fault check-list

Fault

Only strong hissingnoise can be heard

Despite the volume controls

being at a high setting, no signal is audible

Distortion

Slight hissing

Very little dynamic

HDI 234

Frequencyresponse

Modulation. . . . .

Carrierfrequency . . .

Peakswing/ nominalsWing Oeemphasis.

Acousticalsystem. . ....

Olstortlonat 1000Hzand nominalswing

Operatingvoltage. ....

Max.operatingtime with onebattery and medium volume .

Weight . . Couplingto the ear . Max.voiume level.

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

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.

20-20000 Hz

FM

95 kHz/250 kHz

:f: 50 kHz/:f: 35 kHz

50 I'sec.

dynamic transducer <1%

9-V-Battery IEC 6 F22

approx. 50. h

approx. 395 g crrcumaural

approx. 110 dB black

20- 20 000 Hz

FM

95 kHz/ 250 kHz

:f: 50 kHz/:f: 35 kHz

50I'sec.

ISV <1%

85 dB (A)

220 V/ 50-60 Hz, approx. 10 W transmitter: approx. 260 g power supply unit: approx. 320 g

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