Rigol DS1052E user guide: To Set up the Horizontal System

Set up Vertical Position and Scale

You can use the vertical controls to display waveforms, adjust vertical ⨀SCALE and ⨀POSITION, and set input parameters.

1. Using vertical ⨀POSITION knob. The vertical ⨀POSITION control changes the position of signal waveforms in all channels (including MATH and REF). The resolution changes according to the vertical level set. Pressing this knob will clear the channel offset to zero. (The function is available for DS1000D series, but not includes digital channel.)

2. Using vertical ⨀SCALE knob. The vertical ⨀SCALE can change the vertical sensitivity of waveforms in all channels (including MATH and REF, excluding LA). If the Volts/Div is set to "Coarse", the waveform scales in a 1-2-5 step sequence from 2 mV to 5 V. If the Volts/Div is set to "Fine", it scales to small steps between the coarse settings.

3. Channels can be adjusted by the vertical ⨀POSITION and ⨀SCALE only when they are selected.

4. During the vertical position, a position message is displayed on the left bottom of the screen, in the same color as the corresponding channel. The unit is V (Volts).

To Set up the Horizontal System

The oscilloscope shows the time per division in the scale readout. Since all active waveforms use the same time base, the oscilloscope only displays one value for all the active channels, except when using Delayed Scan, or Alternate Trigger.

The horizontal controls can change the horizontal scale and position of waveforms. The horizontal center of the screen is the time reference for waveforms. Changing the horizontal scale causes the waveform to expand or contract about the screen center.

Horizontal position changes the displayed waveform position, relative to the trigger point. Press the horizontal MENU button to display the horizontal menu as follows.

Figure 2- 37 Table 2- 19 The Horizontal menu

The parameter status symbol will be displayed on the screen during horizontal system settings, which can help users to judge the channel status quickly.

Figure 2- 38 Status bar and mark for Horizontal control

Marks Indicator:

① The position of current waveform window in the memory

② The trigger position in the memory.

③ The trigger position in the current waveform windows.

④ The horizontal time base (main time base).

⑤ The trigger's horizontal offset according to the center of the window.

Key Points

Y-T: The conventional oscilloscope display format. It shows the voltage of a waveform record (on the vertical axis) as it varies over time (on the horizontal axis).

X-Y: XY format displays channel 1 in the horizontal axis and channel 2 in the vertical axis.

Roll Mode: In this mode, the waveform display rolls from right to left. No trigger or horizontal offset control of waveforms is available during Roll Mode, and it's only available when set to 500 ms/div or slower.

Slow Scan Mode: This mode is available when the horizontal time base is set to 50ms/div or slower. In this mode, the oscilloscope acquires sufficient data for the left part to the trigger point, then wait for trigger, when trigger occurs, it continues to draw the rest part from the trigger point to the end of the right side. When choosing this mode to view low frequency signals, it is recommended that the channel coupling be set as DC.

Time/Div: Horizontal scale. The Time/Div control expands or compresses the waveform.

Delayed Scan

The Delayed Scan is a magnified portion of the main waveform window. Use Delayed Scan to locate and horizontally expand part of the main waveform window for a more detailed (higher horizontal resolution) analysis of signal. The Delayed Scan time base setting cannot be set slower than the Main time base setting.

Press horizontal MENU \rightarrow Delayed \rightarrow ON or press horizontal SCALE knob to enter Delayed Scan mode.

Figure 2- 39 Delayed Scan window

The screen splits into two parts.

The upper half displays the main waveform window and the lower half displays an expanded portion of the main waveform window. This expanded portion of the main window is called the Delayed Scan window. Two blocks shaded at the upper half; the un-shaded portion is expanded in the lower half. The horizontal POSITION and SCALE knobs control the size and position of the Delayed Scan. The value at bottom of the screen is the main time base and the value on the center bottom means the Delayed Scan time.

• Use the horizontal ⒸPOSITION knob to change the position of the expanded portion.
• Use the horizontal ⒸSCALE knob to adjust the Delayed Scan resolution.
• To change the main time base, turn off the Delayed Scan mode.
• Since both the main and Delayed Scan are displayed; there are half as many vertical divisions so the vertical scaling is doubled. Notice the changes in the status bar.

Delayed Scan Shortcut Key:

Delayed Scan function can be activated not only by menu but also by pressing horizontal ⒸSCALE knob.

X-Y Format

This format is useful for studying phase relationships between two signals. Channel 1 in the horizontal axis(X) and channel 2 in the vertical axis(Y), the oscilloscope uses a none-trigger acquisition mode, data is displayed as dots.

Press horizontal MENU \rightarrow Time Base \rightarrow X-Y to enter the X-Y mode.

Figure 2- 40 X-Y display format

NOTE: In Y-T format, all sample rates are available. But in X-Y format, 100 MSa/s is not available. In common, deceasing the sample rate can display the wavefrom better.

The following modes or functions will not work in X-Y format.

● LA Function (DS1000D series) ● Automatic Measurements ● Cursor Measurements ● REF and MATH Operations ● Delayed Scan Mode ● Vector Display Mode ● Horizontal POSITION knob ● Trigger Controls

The Horizontal Knobs

POSITION: The horizontal POSITION knob adjusts the horizontal position of all channels (including Math) waveforms. The resolution of this control varies with the time base. Pressing this button clears trigger offset and moves the trigger point to the horizontal center of the screen.

SCALE: Use SCALE to select the horizontal time/div (scale factor) for the main or the time base of Delayed Scan. When Delayed Scan is enabled, it changes the width of the window zone by changing the Delayed Scan time base.

To Set up the Trigger System

The trigger determines when the oscilloscope starts to acquire data and display a waveform. When a trigger is set up properly, it can convert unstable displays or blank screens into meaningful waveforms.

When the oscilloscope starts to acquire a waveform, it collects enough data so that it can draw the waveform to the left of the trigger point. The oscilloscope continues to acquire data while waiting for the trigger condition to occur. After it detects a trigger, the oscilloscope continues to acquire enough data so that it can draw the waveform to the right of the trigger point.

The trigger control area on the front panel includes a knob and three buttons:

LEVEL: The knob that set the trigger level; press the knob and the level will reset to zero.

50%: The instant execute button setting the trigger level to the vertical midpoint between the peaks of the trigger signal

FORCE: Force to create a trigger signal and the function is mainly used in Normal and Single mode

MENU: The button that activates the trigger controls menu.

Press the Trigger MENU key to enter the trigger system setting interface.

Figure 2- 41 Trigger controls interface

Trigger Modes

The oscilloscope provides seven trigger modes: Edge, Pulse Width, Slope, Video, Alternate, Pattern (only for DS1000D series) and Duration trigger (only for DS1000D series).

Edge: An edge trigger occurs when the trigger input passes through a specified voltage level at the specified slope direction.

Pulse Width: Use this trigger type to catch pulses with certain pulse width.

Slope: The oscilloscope begins to trigger according to the signal rising or falling speed.

Video: Use video trigger on fields or lines for standard video signals.

Alternate: Trigger on non-synchronized signals of the dual channels.

Pattern: To Trigger through detecting a specified code.

Duration: To trigger within a specified time on the conditions of a specified code.

Edge Trigger

Edge Trigger Mode; An edge trigger determines whether the oscilloscope finds the trigger point on the rising or the falling edge of a signal. Select Edge trigger Mode to trigger on Rising edge, falling edge or rising & falling edge.

Press Trigger [MENU] → Mode → Edge to display the edge trigger menu as follows.

Figure 2-42 Table 2-20 The Edge Trigger Menu

Pulse Width Trigger

Pulse Width Trigger Mode: Pulse trigger occurs according to the width of pulse. The abnormal signals can be detected through setting up the pulse width condition.

Press Trigger MENU \rightarrow Mode \rightarrow Pulse to display the pulse width trigger menu as follows.

Figure 2- 43 Table 2- 21 The Pulse Width Trigger Menu (page 1/2)

Figure 2-44 Table 2-22 The Pulse Width Trigger Menu (page 2/2)

NOTE: The Pulse width adjust range is 20ns ~ 10s. When the condition is met, it will trigger and acquire the waveform.

Slope Trigger

Slop Trigger Mode: Slope trigger sets the oscilloscope as the positive/negative slope trigger within the specified time. Press Trigger MENU \rightarrow Mode \rightarrow Slope to display the slope trigger menu as follows.

Figure 2- 45 Table 2- 23 The Slope Trigger Menu (Page 1/2)

NOTE[1]: Slope time can be set from 20ns to 10s. When a signal meets the trigger condition, The oscilloscope will execute the acquisition.

Figure 2- 46 Table 2- 24 The Slope Trigger Menu (Page2/2)

NOTE[2]: You can adjust LEVEL A/ LEVEL B or both simultaneous by turning the LEVEL knob.

V ideo Trigger

Video Trigger Mode: Video trigger is used to capture the complicated waveforms of television. The trigger circuitry detects the vertical and horizontal interval of the waveform and produces triggers based on the video trigger settings you have selected. Choose video trigger to trigger on fields or lines of NTSC, PAL/SECAM standard video signals. Trigger coupling preset to DC.

Figure 2- 47 Table 2- 25 The Video Trigger Menu (Page 1/2)

Figure 2- 48 Table 2- 26 The Video Trigger menu (Page 2/2, Sync is line)

NOTE[^1]: The line number ranges can be set from 1 to 525 under NTSC standard, and from 1 to 625 under PAL/SECAM.

Figure 2-49 Table 2-27 The Video Menu (When the Sync is set as All lines, Odd field and Even field)

Key points

Sync Pulses: When positive polarity is selected, the trigger always occurs on negative-going sync pulses. If the video signal has positive-going sync pulses, use the negative polarity selection.

Figure 2-50
Video Trigger: Line Synchronization

Figure 2-51
Video Trigger: Field Synchronization

User’s Guide for DS1000E, DS1000D Series

Alternate Trigger

Alternate Trigger Mode: When alternate trigger is on, the trigger sources come from two vertical channels. This mode can be used to observe two non-related signals. You can choose two different trigger modes for the two vertical channels. The options are as follows: Edge, Pulse, Slope and video. The information of the trigger level of the two channels will be displayed on the upper-right of the screen.

Press Trigger MENU \rightarrow Mode \rightarrow Alternate to display the alternate trigger menu as follows.

Figure 2- 52 Table 2- 28 The Alternate menu (Trigger Type: Edge)

Figure 2- 53 Table 2- 29 (Trigger Type: Pulse, Page 1/2)

Figure 2-54 Table 2-30 The Alternate menu (Trigger Type: Pulse, Page 2/2)

Figure 2-55 Table 2-31 The Alternate menu (Trigger Type: Slope, Page 1/2)

Figure 2-56 Table 2-32 The Alternate menu (Trigger Type: Slope Page 2/2)

© 2008 RIGOL Technologies, Inc. 2-43 User’s Guide for DS1000E, DS1000D Series

Figure 2- 57 Table 2- 33 The Alternate menu (Trigger Type: Video, Page 1/2)

\begin{tabular}{|l|l|l|} \hline \textbf{Menu} & \textbf{Settings} & \textbf{Comments} \ \hline Select & CH1 & Set trigger mode for Channel 1 \ & CH2 & Set trigger mode for Channel 2 \ \hline Type & Video & Video Trigger for the channel \ \hline Polarity & \ulcorner positive & Triggers on positive going sync pulses \ & \urcorner negative & Triggers on negative going sync pulses \ \hline \end{tabular}

Figure 2- 58 Table 2- 34 The Alternate menu (Video, Line Num Page 2/2)

\begin{tabular}{|l|l|l|} \hline \textbf{Menu} & \textbf{Settings} & \textbf{Comments} \ \hline Sync & ALL lines & Trigger on all lines \ & Line Num & Trigger on an specified line \ \cline{2-3} & Odd field & Select to trigger on odd field or even \ & Even field & field \ \hline Line Num & \circlearrowleft & Select the specified line number for sync \ & $<$Lines Set $>$ & \ \hline Standard & PAL/SECM & Select Video standard \ & NTSC & \ \hline Set Up & & To go to set up menu, see table 2-39 \ \hline \end{tabular}

Figure 2-59 Table 2-35 The Alternate menu (Trigger Mode: Video, All Lines, Odd Field or Even Filed, Page 2/2)

© 2008 RIGOL Technologies, Inc. 2-45 User’s Guide for DS1000E, DS1000D Series

Pattern Trigger (Only for DS1000D Series)

Pattern Trigger Mode: Pattern trigger identifies trigger terms by checking appointed code. The code is logical relationship of all channels, with high (H), low (L) and ignore(X). Press Trigger MENU→Mode→Pattern to display the pattern trigger menu as follows.

Figure 2-60 Table 2-36 The Pattern Trigger Menu

Key Points:

1. H (High): Logic high: voltage is higher than threshold setting.
2. L (Low): Logic low: voltage is lower than threshold setting.
3. X (Ignore): Don’t care. If all the channels are ignored, the oscilloscope won’t be triggered.
4. Rising Edge (↗) or Falling Edge (↘): Set the code as an edge of the channel, rising edge or falling edge. When the edge is appointed, if code settings of other channels are all true, the oscilloscope will be triggered on the appointed edge. If no edge is appointed, the oscilloscope will be triggered on the last edge whose code is true.

Edge of appointed code

You can only appoint one code as edge. If you have appointed an edge, then appointed another edge in a different channel, and the first appointed edge will be set to X (Ignore).

User’s Guide for DS1000E, DS1000D Series

Duration Trigger (Only for DS1000D Series)

Duration Trigger Mode: Trigger in appointed time when code terms are satisfied. Press Trigger MENU \rightarrow Mode \rightarrow Duration to display the duration trigger menu as follows.

Figure 2- 61 Table 2- 37 The Duration Trigger Menu (Page 1/2) \begin{tabular}{|l|l|l|} \hline \textbf{Menu} & \textbf{Settings} & \textbf{Comments} \ \hline Select & D15-D0 & Choose digital channel for Duration Trigger \ \hline Code & H & High \ & L & Low \ & X & Ignore \ \hline Qualifier & $<$ & Set time limit terms \ & $>$ & \ & $=$ & \ \hline \end{tabular}

Figure 2- 62 Table 2- 38 The Duration Trigger Menu (Page 2/2) \begin{tabular}{|l|l|l|} \hline \textbf{Menu} & \textbf{Settings} & \textbf{Comments} \ \hline Time & \circlearrowleft & Set duration and limit symbol time \ & $<$Time Setting$>$ & \ \hline Sweep & Auto & Acquire waveform even no trigger occurred \ & Normal & Acquire waveform when trigger occurred \ & Single & When trigger occurs, acquire one waveform and then stop \ \hline Set Up & & To go to set up menu, see table 2-40 \ \hline \end{tabular}

Key Points:

1. H (High): Logic high: voltage is higher than threshold setting.
2. L (Low): Logic low: voltage is lower than threshold setting.
3. X (Ignore): Don't care. If all the channels are ignored, the oscilloscope won't be triggered.
4. Qualifier: A timer begins when code terms are satisfied. Duration trigger occurred in the time set by the qualifier.

© 2008 RIGOL Technologies, Inc. User's Guide for DS1000E, DS1000D Series 2-47

Trigger Setup

Set up different trigger settings according to different trigger modes. When choosing source as D15-D0 in the mode of Edge and Pulse (DS1000D series), only Holdoff is adjustable. When source is non-digital channel and in slope trigger, only trigger coupling, trigger sensitivity and Holdoff can be set. For video trigger, Sensitivity and Holdoff can be set. For the pattern trigger and the duration trigger (DS1000D series), only Holdoff is adjustable.

Figure 2- 63 Table 2- 39 The Trigger Set Up Menu (Settings for trigger coupling, trigger sensitivity and holdoff)

Figure 2- 64 Table 2- 40 The Trigger Set Up Menu (Settings for sensitivity and holdoff)

Figure 2-65 Table 2-41 The Trigger Set Up Menu (Settings only for holdoff)

© 2008 RIGOL Technologies, Inc. 2-49 User’s Guide for DS1000E, DS1000D Series

Trigger Holdoff

Trigger Holdoff can stabilize complex waveform, such as the pulse range. Holdoff time is the oscilloscope’s waiting period before starting a new trigger. During Holdoff, oscilloscope will not trigger until Holdoff ends. For instance: To trigger on the first pulse on a group of them, users can set the holdoff time to Pulse cluster width.

Figure 2- 66 Trigger Holdoff display

To use trigger Holdoff:

1. Press the trigger MENU key to display Trigger Menu.
2. Press Set Up key to display trigger set up menu.
3. Turn the multi function knob ( ) to change Holdoff time until waveform is stable.
4. Press Reset can reset the Holdoff time to its default value.