Rigol DS2000 Series Uživatelská příručka stáhnout pdf (Strana 118)

RIGOL 5 To Trigger the Oscilloscope

DS2000 User’s Guide

5-42

USB Trigger (Option)

Trigger on the SOP, EOP, RC, Suspend and Exit Suspend of the data packet on the

differential USB data cable (D+ and D-). This trigger supports USB Low Speed and

Full Speed. The figure below shows the USB data transmission protocol.

Trigger Type:

Press Type to select “USB”. At this point, the trigger setting information as shown in

the figure below is displayed at the upper right corner of the screen.

Source Selection:

Press D+ and D- to specify data sources for D+ and D- data cables respectively.

They can be set to CH1 or CH2 and the current trigger sources are displayed at the

upper right corner of the screen.

Signal Speed:

Press Speed to select “Low Speed” (1.5 Mb/s) or “Full Speed” (12 Mb/s).

Trigger Condition:

Press When to select the desired trigger condition.

 SOP: trigger at the sync bit at the start of the data packet (SOP).

 EOP: trigger at the end of the SEO portion of the EOP of the data packet.

 RC: trigger when SEO is greater than 10 ms.

 Suspend: trigger when the idle time of the bus is greater than 3 ms.

 ExitSuspend: trigger when the bus exits from idle state for more than 10 ms.

Trigger Mode:

Press Sweep to select the Trigger Mode (page 5-3) under this trigger type as auto,

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Rigol DS2000 Series Uživatelská příručka Strana 118