FIRST TIME USE
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Modulation state
Modulation
Error message
Signal source
C3290
Carrier frequency
Frequency standardRF level
Soft
keys
Soft
keys
Fig. 3
-4 Division of the Sig Gen menu (main display) into fields
Modulation field
This field shows all the current modulation settings for the selected signal source: type of
modulation; modulation deviation/depth; modulation frequency; waveform type (shown
graphically); modulation ON or OFF.
The type of modulation is selected by the [FM], [AM] and [
ϕ
M] keys. Only two of the three keys
are shown at any time. This is because the display will already be showing the parameters for the
omitted selection key.
Modulation deviation/depth is selected by the [FM Devn], [AM Depth] and [
ϕ
M Devn] keys.
Modulation frequency is selected using the [FM Mod Freq], [AM Mod Freq] and [
ϕ
M Mod Freq]
keys and the value is shown on the screen against ModF:.
The type of waveform (sine, triangle or square) is obtained from a menu after pressing the [Select
Waveform] key. For external modulation this key is replaced by the [Select Coupling] key.
Internal modulation switching is controlled by the [FM ON/OFF], [AM ON/OFF] and [
ϕ
M
ON/OFF] keys.
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General