3B SCIENTIFIC PHYSICS 1009950 Manual De Instrucciones página 10

5.1 Set-up of base rails (basic set-up)

Insert the central screw under the scale disc
in the hole in the long rail.
The default set-up is with the rails opened out in
a line (the arrow on the long rail points to "0°" on
the protractor scale.

Move the articulated base so that the pointer
coincides with the zero point of the scale.
The pointer is aligned with the normal of the
screen holder and thus allows the angle of inci-
dence to be read off or adjusted directly (read off
the outer numeric scale).
5. Operation
5.2 System set-up

Connect to the mains.

Connect the receiver with horn antenna or the
microwave probe to the receiver terminal (1).

Connect the transmitter with horn antenna to
the transmitter terminal (4).

Set up the transmitter and receiver on the
base rails as appropriate to the experiment.

Set the controller for the signal gain of the
speaker (9) to its centre position.

Use the switch (8) to turn on the speaker.

Use switch (7) to send the modulator to "INT".
The microwave signal emitted is modulated with
a square wave. The modulation frequency can be
listened to by means of the built-in speaker.
The amplified receiver signal can be output from
sockets (2) and (3) in the form of a DC signal
(once modulation has been turned off), in the
form of a square wave (with internal modulation)
or in the form of low frequency signal (external
modulation). Modulation is deactivated when
switch (7) is in its centre position. DC signals pro-
portional to the level and gain are output from
sockets (3) and (4).
This can, for example, be displayed using an in-
strument with a dial (e.g. Escola 30 analog multi-
meter 1013526).
If switch (7) is set to "EXT" low frequency signals
(e.g. from an MP3 player) can be input to sockets
(5) and (6) and played on the internal speaker in-
side the basic apparatus. (jack to 4-mm socket
adapter needed).
Information is sent via the microwave signal from
the transmitter to the receiver.
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