What's the difference between history and sequence function? Current high-performance oscilloscope provides a high sampling rate and high bandwidth, but in some continuous measurement of multiple low duty ratio of pulse or have a long free time pulse sequence signal (Burst), such as laser pulse and the stability, low duty ratio radar pulse, or even embedded in the circuit the occasional narrow pulse signal, to capture and view the multiple continuous pulse, must increase the oscilloscope sampling time. According to the theorem the sampling rate × the sampling time = the storage depth, to improve the sampling time with the storage depth in a certain number, we have to reduce the sampling rate. Another way is to upgrade the storage depth, but because of the high-speed storage in oscilloscope is very precious, It’s a high cost way. SDS2000 series oscilloscopes Siglent recently launched have 28 Mpts deepest memory. Under the 2 GSa/S sampling rate, the oscilloscope can only capture 14 ms signal. It’s not enough to view the continuous multiple free time signal. So upgrade the storage depth to solve the problem is not an economic and efficient way. To this end, Siglent provides an effective way to solve the similar problem: the Sequence (Sequence waveform).Just as its name implies is the memory of the oscilloscope can be divided into a number of sequences, each sequence of waveform that is put in the current triggered waveform, trigger a save one. In Sequence mode, the waveform capture rate can reach 300000 times. Cooperate SDS2000 oscilloscope unique History (History waveform) function, can see every moment of waveform captured and the time interval between two times. By this technique, the oscillosco

can maintain the high sampling rate, means it can’t lost signal details information, at the same time, we can acquire the signal we interest in for a long time, and not leak any useful information. Sequence 1 Sequence Schematic Figure 1 the princ iple of Sequenc e For a long time to acquire burst signal. The Burst signal is often used in radar and sonar signals. Long time acquiring Burst signal with the traditional sampling method is a big challenge, which has to compromise between the acquisition time and sampling rate. In many cases, even reduce the sampling rate can't satisfy the acquisition...

Burst waveform's Zoom view of SDS2000 For the same Burst signals, if open the Sequence mode, SDS2000 can acquire Burst signal for a longer time. As shown in figure 3. SDS2000 series oscilloscope in 28 MPTS standard memory can support up to 80000 frame sequence. For example, when set the oscilloscope waveform sequence frames to 4067, as shown in figure 3 and 4, the oscilloscope can acquire 4067 segments Burst signal.

Figure 2 Sequence waveform in overlay display mode view Figure 3 Sequence in waterfall display mode view Open History function History furnish navigation and playback of the Sequence, by using the fast forward and fast rewind function, you can quickly find the time period wanted to know, and view the current sequence number (NO) and the sequence of Time

5IGLGNT TECHNOLOGIES CO.,LTD. -The leading manufacturer of oscilloscopes by shipments in China Add: 3F, Building No.4, Antongda Industrial Zone, 3rd Liuxian Rd, Bao'an District, Shenzhen, 518101, China Tel: +86-755-3661 5186 Fax: +86-755 3359 1582 Website: www.siglent.com/en information (Time) which can be used to determine the Time interval between the Time and events. The figure shows the time interval of the Sequence is 1 ms. HISTORY View On Figure 4 waveform playback view in History function 2. Acquire narrow pulse for a long time Same to Burst waveform, for continuous accidental narrow pulse...

the narrow pulse's Zoom view of SDS2000 If you open the sequence function, SDS2000 can acquire more occasional narrow pulse signal. Open the History function we can playback and analysis the narrow pulse signal which we care about. the narrow pulse view in Sequence waveform

Add: 3F, Building No.4, Antongda Industrial Zone, 3rd Liuxian Rd, Bao'an District, Shenzhen, 518101, China Tel: +86-755-3661 5186 Fax: +86-755 3359 1582 Website: www.siglent.com/en