EL-31_V2.1b_en.docx
April 7, 2019, ©
Elcon
, Switzerland
Page 9 / 29
Figure 1
Plug in a 5V-power supply to the connector P3 (pin 1 is
+
pole, pin 2 is
-
pole).
If you own a power supply with current limit, set it to a maximum current of about
40mA.
Connect the frequency counter to the RF signal generator so that you can always meas-
ure the exact frequency.
Connect the input of the auxiliary circuit to the signal generator. Connect the output of the
auxiliary circuit with P3 / Pin 3 of the display board.
Turn on the 5V power supply to power the display board.
If the display shows
.
.
select the
„Setup“-Mode by pressing the
VOL+
or
VOL-
button on the remote control.
Press the numeric key no
3
on the remote control.
„Automatic Frequency Display
Mode“ is displayed.
Using the
VOL+
or
VOL-
buttons the
„10Hz-Frequency Display Mode“, the fre-
quency is always displayed in the 10Hz-resolution without the MHz digits.
Press the numeric key no
3
on the remote control again. You are now back in the
mode.
Press the
VOL+
or
VOL-
key until
.
.
is displayed.
Turn on the signal generator and set a frequency, for example 13.000.000 MHz at a level
of about 0dBm.
Change the trim potentiometer at the auxiliary circuit to a stable frequency reading on the
display unit, for example
.
.
(last digit = 10Hz).
Set the frequency with a non-conductive screwdriver on the trimming capacitor C7 exactly
to the frequency that you are reading on the frequency counter.
e.g.
.
.
if accurate 13.000.000 MHz is measured.
Use the remote control by pressing the
VOL+
or
VOL-
key to select the
„Setup“
mode.
Press the numeric key no
3
on the remote control. You see
.
Change with the
VOL+
or
VOL-
key to the
mode.
Press the numeric key no
3
on the remote control again. You see
.
Press the
VOL+
or
VOL-
key until the display shows
.
.
(last digit = 100Hz).