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FSK
To select FSK press the MOD key to turn on modulation and then press the Type soft key to
show the display below.
The
soft-key indicates that there are too many options to show all at once so press this key to
show more. In this case there is one more list of types which will show when the
soft-key is
pressed.
One more press of the
soft-key will show the first list again.
The soft-keys present all of the modulation types which may be applied to the selected carrier
waveform. If
FSK is not already selected press the FSK soft-key followed by the Done key to
return to the top level modulation menu.
To select the modulation source press the
Source soft-key. The options are Internal or
External. Internal will use an internally generated trigger signal, external will use the signal
present at the TRIG IN connector and the
Rate soft-key will disappear. The Graph Box will show
a switching carrier and a square-wave as the modulating waveform irrespective of the source of the
switching signal.
FSK will generate the carrier frequency while the switching signal is false and the hop frequency
while the switching signal is true. To set the hop frequency press the
HopFrq soft-key. The hop
frequency parameter will appear in the Edit Box and the modulating waveform in the Graph Box will
show that hop frequency is being edited.
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