25
FM demodulation
Instruction
Key strokes
Connect the signal generator to the RF IN
connector and turn on the signal generator’s
FM and RF output.
Set the signal generator to 100 MHz, FM; FM
deviation, 100 kHz; FM rate, 1 kHz; amplitude
–15 dBm.
Turn on the FM demodulation analysis
function.
[MODE], rotate the knob to highlight
Demodulation Analysis, [ENTER], {FM}
Set the carrier frequency.
{Carrier Freq}, [100], {MHz}
Set the attenuation state to auto.
{More 1 of 3}, {More 2 of 3}, {Attenuation
{Auto}}, {More 3 of 3}
Set the Y scale.
{Y Scale}, {Auto Scale}, {Return}
Set the FM deviation limit and turn on the limit
function.
{More 1 of 3}, {Limits}, {FreqDev UP}, [11],
{kHz}, {FreqDev Low}, {9.9}, {kHz}, {Limits
on)}, {Return}
Figure 16. FM demodulation
Detailed metrics give you a complete understanding of the FM signal.
Section 12
AM/FM, ASK/FSK Demodulation (continued)
