59
Table 4- 7
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 carrier frequency, use the multi-functional control and direction keys or press soft key Freq, input the required value
and select the unit after selecting carrier waveform.
Select modulation source
The function/arbitrary waveform generator can select internal or external modulation source. After you use PSK function,
the modulation source is internal by default. You can change it with multi-functional control on the interface for using PSK
function or by pressing soft function key Source.
Figure 4- 58 Select modulation source
1)
Internal source
When using an internal modulation source, the modulation wave can be sine wave, square wave, sawtooth wave and
arbitrary wave, and is sine wave by default. After you use PM function, the 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
