Sennheiser SK 1013-6-1 User manual

Controls
8-pinmicrophoneconnector
2) Lineinputjack, 3.5 mm 0
Selectortor microphonesensitivity
Recommendedposition: ~
4) Contactstor recharger
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Inserting batteries
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Fig.1: Fig. 2: Inserting batteries
Recommanded battery type:
alcaline manganese, type Mignon
IEC LR 6 or NiCd -accu.
Removing the cover
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Fig.3a Fig.3b
Fastening chest and neck strap
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Fig.4 Fig.5
Note: During operation avoid pressing the antenna of the SK 1013 -6-1
against your body or touching it with your hand as this would affect
the performance of the transmitter. 3

Wearing the SK 1013 - 6 - 1with clip
If aclip- onmicrophoneisused,thetransmitteristo bewornaccordingto fig.6 and7.
Fig.6
Fig.7
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Fixing the clip
D.
Wearing the transmitter
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RF Transmitter SK 1013-6-1
Delivery includes: 1 transmitter
1 neck strap EZU 1011
1 clip GZK 1011
Introduction
The SK 1013-6-1 is a battery-powered RF-transm itter for wireless sound transmission in com-
bination with the R F-receiver E K 1013-6-1.
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The SK 1013-6-1 has been designed as an acoustical support for persons with impaired hearing
in regular schools, evening school; and universities. The Sennheiser Mikroport system consisting
of a SK 1013-6-1 and an EK 1013-6-1 offersthe listener direct reception of the spoken word,
thus eliminating all influences caused by the acoustical characterstics of the room along with
the normal attenuation due to the distance between speaker and listener. The bullt-in "HiDyn"
noise reduction system makes fm supreme transmission quality.
The SK 1013-6-1 may alternatively be powered by three batteries, types IEC LR 6, or by re-
chargeable batteries of the same type"
Connecting the microphone
To the.microphone input connector (1) Sennheisermicrophones,types MKE4012 (cardioid)
and MKE 2012 (omnidirectional) may be connected. Due to its high directivity and the re-
sulting enhanced intelligibility MKE 4012 should be given preference in noisy environments.
In any case, we strongly suggest using the windscreen which comes with the microphone to
eliminate wind and popping noises.
~3
2 r ., + VB for electret microphone
L J
41 AF
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jWiring diagram
Connection of a tape or cassette recorder
If you want to feed audio signals from a tape recorder or a cassette recorder into the trans-
mitter to complement the normal voice transmission, plug these sets into the 3.5 mm jack (2).
In those case the microphone is automatically switched off.
Always use the record/playback connector of the tape or cassette recorder. If the set is only
equipped with an output for headphones or an external speaker, please observe the following:
the line input isdesigned for input levels between 70 mV and 1.5 V. Transient peaks on the
input exceeding 1.5 V are compensated by the high-grade limiter. This should, however, only
happen under exceptional circumstances. The better way is always to reduce the input level
by means of the volume control on the ~ecorder. Sources with a fixed output level of more
than 1.5 V require the use of an attenuator which should be inserted between the source and
the transmitter
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Example
Adjusting sensitivity 01 microphone and line input
Under the cover (5) you will find a control (3) for the sensitivity of the microphone or line
input which works similar to the level control on a tape recorder (fig. 3a + 3b). Besides the
manual control the transmitter contains a limiter circuitry which reduces the input gain if a
certain threshold isexceeded (i. e. if the swing of the transm itter reaches.:!:.8 kHz). For sen-
sitivity adjustment proceed as foliows:
Switch on transmitter and receiver. Make sure that both sets are operating at the same fre-
quency. Turn the control (3) to its left stop. Speak into the microphone at normal voice.
Optimum results have in practice been reached by speaking a long "aaahh" into the micro-
phone. During this level check hold the transmitter in its normal operating position.
Listen to the signal at the receiver with a set of headphones while you speak into the mi-
crophone. Slowly increase gain until the volume ceases to rise. Now reduce the setting by a
quarter-turn.
Fastening neck strap and clip
The set is supplied with a neck strap and a clip for fastening the set to the body. The strap must
be attached to the slots shown in fig. 4 and 5. When fastening it must snap into place with an
aud ible click.
With the clip the transmitter can be easily attached to the waistband or belt (fig. 7). Since the
microphone MKE 2012 and MKE 4012 are not suitable for this kind of application a clip-on
microphone, e. g. MKE 2 R, MKE 10 R or MKE 40 R isto be used instead.
During operation avoid pressing the antenna against your body, touching it with your hand er
winding the microphone cable around it. Otherwise the radiated power would be reduced.
Operation with batteries or rechargeable batteries
The transmitter may be powered either by alkaline batteries, type Mignon IEC LR 6, or by
nickel cadmium accumulators (1.2 V / 500 mAhl. The preferred type of battery should be the
alkaline type, as other types of dry cells might not ensure reliable operation of the transmitter.
In frequent use of the transmitter nickel cadmium accumulators are more economical. The
SK 1013-6-1 features two lateral contacts (4) for recharging; so the batteries can remain in the
set while recharging them. Depending on the type of battery used, there are variations in operat-
ing time:
NiCd-accumu lators: approx. 10 hours
alkaline batteries: approx. 30 hours
Hints for operation on rechargeable batteries
1. Switch off the transmitter before recharging.
2. After use always put the transmitter into the charger. This will ensure that the accumulators
are at all times optimally charged.
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Technical data
Carrier frequencies
Frequency stabil ity between - 1ooC and + 550C
and battery voltage deviation of + 10 % and - 30 % .:!:.2 kHz
RF-output into dummy load 10 mW
Rad iated power ~ 1 mW
Radiated spurious and harmonic frequencies ~ 4 nW
Modulation mode FM
Nominal swing .:!:.8kHz
S/N ratio at nominal swing and max. sensitivity typ. 68 dB (CCIR 468, peak)
typ. 82 dB (DIN 45500, curve A, rms)
1 frequency in the range of 30 to 45 MHz
Microphone input
AF-sensitivity (nominal swing) max. 3.5 mV (limiter threshold)
min. 70 mV (limiter threshold)
pin 1: AF
pin 2 + 3: ground
pin 8: DC-voltagefor supply of electret mi-
crophones
Wiring
Line input
Input impedance
AF-sensitivity (nominal swing)
approx. 220 kD
max. 70 mV (ljmiter threshold)
min. 1.5 V (limiter threshold)
approx. 26 dB
Adjustlng range of the level control
Control range oflimiter at
max. sensitivity
min. sensitivity
THD at nom. swing, 1000 Hz
AF-frequency response Ci.3 dB)
Roll-off above upper cut-off frequency
Preemphasis
Current consumption at 4.5 V
Power supply
Operating time
approx. 40 dB
approx. 20 dB
.:s1%
100 Hz to 10 kHz
18 dB/oct. (active lowpass filter)
50 ILS
approx. 35 mA
3 x 1.5 V battery (Mignon IEC LR 6)
approx. 30 h with alkaline batteries
approx. 10 h with NiCd-accumu lators
height: 100, with helical antenna: 185
width: 66
deoth: 38
200 9
Dimensions in mm
Weight (with batteries and microphone)
We reserve the right to alter specifications, in particular with regard to technical improvements.
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