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RF-TRANSMITTER SK 1011
The SK 1011 may alternatively be powered by three batteries, type
IEC LR 6, or by rechargeable batteries of the same size. Two
contacts are provided on the side of the set to allow recharging
batteries with an SZL 1011-2 battery charger. The transmitter is
supplied with a neck strap and a clip.
Operation
Inserting the batteries
Delivery includes: 1transmitter
1 neck strap EZU 1011
1clip GZK 1011
Introduction
The SK 1011is a battery-powered RF-transmitter for wireless sound
transmission in combination with an RF-receiver, preferably our
model EK 1011.
A typical application for the SK 1011is as an acoustical support for
persons with impaired hearing in regular schools, evening schools
and universities. The Sennheiser Mikroport system consisting of an
SK 1011 and an EK 1011ofters the listener direct reception of the
spoken word, thus eliminating all influences caused by the acous-
tical characteristlcs of the room along with the normal attenuation
due to the distance between speaker and listener. We would like to
explaln this by way of the following example:
The speaker, e. g. a teacher, wears the combination of a micro-
phone and a transmitter. The listener, a child or adult with a hearing
disability, wears the EK 1011 receiver. Depending upon the extent of
audltory impairment, the output of the receiver may be connected to
either a set of headphones or to a hearing aid already in use. The
amplified signal from the EK 1011reaches the listener's ear loud and
clear. Even a person sitting in the last row of an auditorium with
poor acoustics will be able to understand the teacher just as though
he were speaking at a close distance into the listener's ear.
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Fig.1: Fig.2:
Opening the batterycompartment Insertingthe batteries
A few words about the technical performance of this transmitter:
A selector on the SK 1011makes it possible to choose one of three
frequencies (36,7 MHz, 37,1 MHz and 37,9 MHz) assigned by the
German telecommunications authority for Mikroport-operation. The
8-pin input connector on the transmitter matches
the MKE4012
and MKE 2012 microphones. The 3.5 mm jack next to the micro-
phone connector accepts audio signals from cassette or tape
recorders.
Connecting the microphone
To the microphone input connector Q)Sennheiser microphones,
types
MKE4012 (cardioid) and MKE 2012 (omnldirectional) may be
connected. Due to its high directivity and the resulting enhanced
intelligibility MKE 4012 should be given preference in noisy environ-
ments. In any case, we strongly suggest using the windscreen
which comes with the microphone to eliminate wind and popping
noises.
The built-in "HiDyn" noise reduction system makes for supreme
transmission quality. To ensure that this quality is maintained the
"HiDyn" system is not defeatable. Therefore, the system requires
receivers wh Ich are also equipped with the "HIDyn"-system, such
as EK 1011.
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3
2 r ... + UBfor electret microphone
4 I. J
1 AF
Fig. 3: Wiring diagram
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