Velleman K4601, Illustrated Assembly Manual

Page: 11 / 16

11
Preparation:
Set trimmer potentiometers RV1 (audio) and RV2 (video) to a maximum (completely clockwise).
Set the frequency trimmer capacitor, CV1, to the middle of its range.
Carefully turn the core of L4 completely down using a suitable screwdriver.
Put the housing cover into place.
Connect a video and audio signal to the inputs of the modulator
Using a cable and connectors, connect the antenna output of the modulator to the antenna input of the
TV set, or connect a 30cm length of stiff wire to the modulator antenna connector.
ATTENTION: As soon as an antenna is connected to the modulator, it becomes a transmitter
which is prohibited in some countries.
Connect a supply voltage (adaptor) of between 12 and 15 VDC to the supply voltage connector. Check
the polarity, the edge of the connector must be negative.
Set the modulator switch to ON. The control LED should now light up.
19. Test and setup
Test and setup