OPERATION
3-1-10
Changing the value of the selected parameter
If an error is made when keying in, press the soft key again and key in the correct value.
If an error message is displayed, it can be canceled by entering a value which is within limits.
(1)
Using the numerical key pad, enter 100 MHz by pressing keys [1], [0], [0] and the
key marked [MHz/mV/ms]. Observe that the Carrier Freq. display changes to
100.000 0000
MHz.
(2) Press
[RF level]
. The
RF Level
soft key label is now highlighted.
(3)
Using the numerical key pad, enter 10 dBm by pressing keys [1], [0] and the key
marked [Hz/dB/rad]. Observe that the RF Level display changes to
10.0 dBm
.
(4) Press
[AM]
on the left-hand side of the display. The menu will now change to
display AM modulation parameters in the lower panel. The
[FM Devn.]
soft key
on the right hand side of the menu changes to
[AM Depth]
and this label is now
highlighted.
AM
disappears from the left-hand side.
(5)
Using the numerical key pad, enter 30% AM depth by pressing [3], [0] and
[kHz/
μ
V/%]. Observe that the
AM
depth display changes to
30%
. The display
will now be as in Fig. 3-1-4 and the selected signal will now be present at the RF
OUTPUT socket.
Enabling or disabling the modulation
The modulation is ON by default, but the AM can be turned ON and OFF by pressing
[AM ON/OFF]
at the right hand side of the display and the modulation can be enabled or
disabled by pressing [MOD ON-OFF]. These are both toggle actions, i.e. press ON, press OFF.
The soft key acts only on the selected modulation whereas the [MOD ON-OFF] acts on all
modulations.
Fig. 3-1-4 Amplitude modulation - menu configuration
RF
Level
Carrier
Freq.
LOCAL
AM
ON/OFF
AM
Depth
Source
Freq: F4
Low
Intermod.
Select
Source
Wideband
FM
FM
Carrier :
Freq.
RF Level :
dBm
Single Modulation Mode
Modulation ENABLED
MHz
Int Std: 10 MHz
AM:
Int F4 : 1.0000 kHz
ON
100.000 0000
10.0
ON
30.0%
C1886
Φ
M
