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Operation
The Mikroport-receiver EK 1010 provides three switch-selectable
receiving frequencies. First select the trequency to be used at the
receiver. This is accomplished at the receiver EK 1010 by means
ot the channel selector 4 (Fig 1).
Channel 1 = 36.7 MHz
Channel 2 = 37.1 MHz
Channel 3 - 37.9 MHz
These frequencies are valid lor the standard model (special fre¬
quencies see technical data).
The
frequency switch
is hidden in the slot (or the channel selector
and is protected against inadvertent operation To operate this switch
please use the tool at the end ol the antenna
A
(Fig 2). The pm
G
has the correct dimensions to serve as a tool lor the channel switch.
For the following please reler the (ig. 3: On the right side ol the
receiver head besides the connection socket you will lind a small
operating panel with the switch 8, two LED's 9 and 10 and the
control
11
.
Their (unctions will be described below.
Operation switch 8:
In the position OFF the unit is completely in¬
operative II the operation switch is put Into the position TEST first the
greon LED 10 will light up it the battery voltage is at least 6 V. Proper
operation can be expected il this control diode lights up brightly l(
this diode glows only dimly the battery should be changed The rod
LED 9 indicates receiver operation. This diode only lights up i( tho
switch 8 is set trom position TEST to position ON To extend the
battery life Iho greon LED 10 is switchod oil In the position ON
Volume control 11:
By means ol tho volume control
11
the output
level lor ihe equipment connoctod (e.g. headphone, mduciion coil,
lape recorder) to Ihe pins 2 (ground) and 3 (high level output) may
be set. Tho maximum output voltage is approximately 3 V Tho
connected load should not be less than 100 i) since otherwise the
battery life decreases rapidly Tho fixed level of 2 mV at the pins 2
(ground) and 5 (audio) is independent trom the setting ot the
volume control
11.
Connection socket 12:
According to tig 4 the audio voltage is
available at pms 2 and 3 (variable, max. 3 V) and at pins 2 and 5
(fixed level, 2 mV) ot the 8-pin connection socket. The receiver may
also be operated with external supply voltages via pm 8 (nominal
voltage + 9 V to pin 8. minus to pm 2 or connector housing).
In this case the batlery has to be taken out.
Pin 7 serves to switch off the electronic squelch. If this is desired a
solder connection das to be made in the connector between pin 6
and 7.
Squelch:
The electronic squelch prevents noise signals to reach
the equipment connected at the high level output. It the RF-input
voltage at the antenna decreases below the factory set value ol
4 MV (e.g when the distance to the transmitter is too (ar or it
the signal lades) the output switches oil The 2 mV-output ot the
receivers EK 1010 and EK 1010-R is not switched by the squelch.
This low-level output is, however, also switched off in the EK 1010-6.
If necessary, the squelch circuit can be made inoperative by bridging
pin 6 and 7 ot the connector.
Inserting the battery
The following 9-V-battenes to lEC 6 F 22 standard are recommend¬
ed: Daimon No. 249. Mallory MN 1604 or NC-accumulator Varta
Tr 7/8. The battery compartment
B
is opened by pressing gently as
indicated by Ihe arrow on tig. 2. When inserting the battery please
note that the minus terminal must tit into the large contact opening
ot the battery contacts. The unit will only operate it the battery is
inserted with correct polarity.
Close the lid until it snaps in audibly The hinge ot the battery com¬
partment lid cannot be destroyed by mishandling since it simply
comes oil and can be snapped in again
Antenna connection
The supplied flexible antenna
A
is screwed into the bottom of the
receiver (Fig. 2). The antenna has a slotted screw-terminal
S
and
can be easily replaced by means of a small screwdriver. Depending
upon the use of tho EK 1010 as a portable receiver the antenna has
to be relatively shod. For stationary operation and to improve the
reception it is recommended to extend tho length ot the antenna up to
max. 1.8 m. A lurther improvement of the reception can be achieved
by installing Ihe antenna always as high as possible • tor "MikroporT
equipment always vertically.
Identification label and licence number
The identification sticker
T
In the battery compartment contains the
figures lor all receiving frequencies lor tho three channels and the
licence number which will bo necessary when applying lor tho li¬
cence 10 operate your equipment.
Operation from accumulators - Automatic
charging unit SZL 1010
Powering the receiver Irom accumulators can be very economical
when Ihe unit is used frequently if tho normal battery is loplnced by
an accumulator (e.g Varta Tr 7/8) the accumulator can be kept opti¬
mally charged by means ol the automatic charging unit SZL 1010
(Fig. 6). The charging unit will accept Iwo units at a time (e.g. one
transmitter and one receiver). The receiver therelore has charging
contacts (Fig 5) at the side which make automatically contacl it ihe
transmitter is inserted into the charger SZL 1010
10
11
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