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reach to 5MHz only.
3.5.2 Setting of amplitude of carrier waveform Press the key of 【Menu】 to
light up the indicator light of “Carrier” and the value of amplitude of carrier
waveform will be displayed. The setting of carrier frequency can be set by the
numeric keys or adjusting of knob.
3.5.3 Setting of frequency deviation modulation： Press the key of 【Menu】 to
light up the indicator light of “Devia”， the offset value of frequency modulation
will be displayed. The setting of frequency deviation modulation can be carried by
the numeric keys or adjusting of knob. The frequency deviation modulation stands
for the change of carrier frequency in the frequency modulation process expressed as
following：
DEVI％ =100×SHIFT/PERD.
Where, DEVI is the frequency deviation modulation. SHIFT is the maximum single
peak change value in frequency modulation. PERD is the period value when the
frequency deviation modulation is 0.
In practice, the offset value of frequency modulation is under 5％ in order to limit the
bandwidth taken by the carrier signal.
3.5.4 Setting of frequency modulation： Press the key of 【Menu】 and light up
the indicator light of “FM”， the value of frequency modulation will be displayed.
The setting of the value of frequency modulation can be set by the numeric keys or
adjusting of knob. In frequency modulation, the signal of channel B is taken as
modulation signal and the modulation frequency is in fact the frequency of channel B.
Generally speaking, carrier frequency should be 10 times higher than modulation
frequency.
3.5.4 Setting of modulation waveform： Since the signal of channel B is taken as
the modulation signal, the modulation waveform is, in fact, the waveform of channel
B. Press the key of 【Menu】 and light up the indicator light of “FMfreq”. The
sequence number and the name of the waveform of channel B will be displayed. The
setting of modulation waveform can be carried by entering the sequence number by
the numeric keys or adjusting of knob.
3.5.5 Exterior modulation ： Frequency modulation uses exterior modulation
signals. There is a port of “Modulation input” on the back panel, which can import
exterior modulation signals. The frequency of exterior modulation signal should fit
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