OPERATION
3-1-9
FIRST TIME USE
First time users can quickly become familiar with the principles of control and display by
carrying out the following exercise, which demonstrates how to set up a typical basic signal
having the following parameters:
Carrier frequency:
100 MHz.
Output level:
10 dBm.
Amplitude modulation: 30% depth at 1 kHz.
Switching on
(1)
Before switching the instrument on, check that the voltage selector has been set to
the value of the power supply as described in Chap. 2, and that no signal voltage
is present on the PULSE INPUT socket.
(2)
If the default display shown in Fig. 3-1-3 is not obtained, a previous user may
have set the instrument to switch on with one of the user memories recalled rather
than using the default factory settings. Before proceeding any further you should
reset this selection, see 'Power up options'. Switch off and on again.
Alternatively use the [MEM] key followed by entering 50 and terminating by
pressing the [enter] key. This will reset the instrument to the factory default
setting.
If the RF level units and the internal/external standard are not as shown, they can
be changed as described on Page 3-1-56, 'RF level units' and Page 3-1-52
'Selection of frequency standard'.
(3)
Observe that the main menu appears on the display showing default parameters
for FM. The soft key label marked
[Carrier Freq.]
is highlighted (i.e. the line
bordering the label is increased in thickness to about 1 mm), which means that
anything entered at this stage will change the carrier frequency.
(4)
If necessary, adjust the display for brightness and contrast, see 'UTILITIES'
Page 3-1-49.
