Datasheet

5.10.5 Trigger Source

Press〖Trigger〗softkey. When Internal source selected, generator takes internal source

and shift rate setting is available. When External source selected, generator takes

external source and shift rate setting is disabled. Details refer to Chapter 3.14.

5.11 Frequency Sweep

Press 【Sweep】 key to enter the sweep mode. The frequency sweep sketch and menu

will be both displayed.

5.11.1 Set Sweep Signal

Firstly, set up the waveform shape, amplitude and offset of sweep signal. In the

frequency sweep mode, the waveform generator moves from the start frequency to the

stop frequency at a sweep rate which you specify. It can span within the whole frequency

range and the phase of output signal is continuous. The waveform generator can

produce a frequency sweep for most waveforms mentioned above, but some waveforms

are not available.

5.11.2 Sweep Mode

Press〖Sweep Mode〗to select Linear or Log for sweeping.

(1) In Linear mode, frequency step is fixed. For wide sweep range, fixed step has

negative influence, which leads to high sweep resolution, slow sweep speed and

precise sweeping at high frequency, but low sweep resolution, fast sweep speed

and coarse sweeping at low frequency. Therefore, linear is much applicable for

narrow sweep range.

Linear sweep is similar as FM with modulating waveform ramp, the difference

between which is that no modulating wave needed for sweep, just output discrete

points in interval continuously.

(2) In Log mode, frequency step is not fixed but changes with log relationship. At high

frequency, the step is large and at low frequency step is less. For wide sweep range,

the variation is relative well-proportioned, so log sweep is applicable for wide sweep

range.

5.11.3 Start Frequency and Stop Frequency

Press the 〖Start Freq 〗or 〖Stop Freq〗 softkey. Then use the knob or numeric keypad

to enter the desired frequency.