53
Table 4- 5
Carrier waveform
Frequency
72-14120
72-14122
72-14126
Sine wave
1μHz~ 80MHz
1μHz ~ 120MHz
1μHz ~ 160MHz
Square wave
1μHz ~ 30MHz
1μHz ~ 40MHz
1μHz ~ 50MHz
Sawtooth wave
1μHz ~ 30MHz
1μHz ~ 40MHz
1μHz ~ 50MHz
Pulse wave
1μHz ~ 2MHz
1μHz ~ 3MHz
1μHz ~ 4MHz
Arbitrary wave
1μHz ~ 30MHz
1μHz ~ 30MHz
1μHz ~ 30MHz
To set the carrier frequency, please use the multi-functional control and direction keys or press soft function key Freq,
input the required value and select the unit after selecting carrier waveform. If the current carrier waveform meets your
requirements, you can also directly set the carrier frequency in the interface of FSK modulation, providing a more flexible
and intuitive input mode.
Select modulation source
The function/arbitrary waveform generator can select either an internal or external modulation source. After you use FSK
function, the modulation source is internal by default. You can change it with the multi-functional control on the interface
for using FSK function or by pressing Source.
Figure 4- 49 Select modulation source
1)
Internal source
In case of internal modulation source, modulation wave can be sine wave, square wave, sawtooth wave and arbitrary
wave, and is sine wave by default. After you use PM function, you can see that modulation wave is sine wave by default.
You can change it with the multi-functional control on the interface for using phase modulation function or by pressing the
key of basic waveform type setting.
•
Square wave: duty ratio is 50%
•
Sawtooth wave: degree of symmetry is 0.10%
•
Arbitrary wave: when selecting arbitrary wave as modulation waveform, function/arbitrary waveform generator
limits length of arbitrary wave to 32Mpts by automatic test count.
