User manual FLUKE 99B

[. . . ] 92B/96B/99B/105B ScopeMeter Users Manual 4822 872 00724 March 1996, Rev. Printed in the Netherlands All product names are trademarks of their respective companies. I TABLE OF CONTENTS CHAPTER 1 INTRODUCING YOUR SCOPEMETER TEST TOOL SCOPEMETER TEST TOOL FEATURES . 3-12 II 92B/96B/99B/105B Users Manual CHAPTER 4 USING THE DUAL DISPLAY MODE FUNCTIONS MAKING CONNECTIONS . 5-21 USING THE SCOPE RECORD AND MIN MAX ENVELOPE FUNCTIONS OF THE FLUKE 96B, 99B, or 105B . [. . . ] With a high-speed time base (10 µs/div) you can look at line #1. TIME DELAY is used to shift the beginning of the waveform display at some time before or after the trigger point in all trigger functions. 5 - 16 Selecting TV System and Scan Rate Before using TV triggering, make sure that the test tool is set for the correct TV system and scan rate. The TV system setting is shown at the top of the display, as shown in Figure 5-13. 92B/96B/99B/105B Users Manual To verify or change TV trigger settings, do the following: 1. From the TV Trigger Menu (see Figure 5-12): Press to display the TV trigger settings in the MORE TRIGGER menu. NOTE If the TV trigger settings are incompatible with the TV system under test, the test tool might not display a stable picture or might select a wrong line number. TV System PAL PAL/M NTSC SECAM NON-INTERLACED Video =Positive =Negative TV Trigger Function LINES FRAME LINE :### 3. TV system and trigger function indicator Using in Scope Mode Using the LINES Trigger Function With this function, all lines are displayed. The test tool triggers on the horizontal synchronization pulse (line sync). To activate the LINES trigger function, open the TV trigger menu (see Figure 5-12); then press to highlight LINES. The top of the display now indicates the Lines function (see Figure 5-13). 5 - 17 Using the FRAME Trigger Function With this function, the test tool triggers on vertical synchronization pulses (frame sync). To activate the FRAME trigger function, open the TV trigger menu (see Figure 5-12); then press to highlight FRAME. The top of the display now indicates the Frame function (see Figure 5-13) 5 - 18 Using the SELECT LINE Trigger Function With this function, the test tool can trigger on any specific line in a frame. From the TV Trigger Menu, press (SELECT LINE) to display the select line menu (see Figure 5-14). 92B/96B/99B/105B Users Manual 1) 1) 2) 1) 1) These menu options are disabled (blank) for noninterlaced setting. 2) This menu option is disabled (blank) if 4-FIELD SEQUENCE is off (not highlighted). Figure 5-14. NOTE When you have selected 'TV System: Non-interlaced' in the MORE TRIGGER menu, the ODD and EVEN FIELD selection is disabled (not visible on the display shown in Figure 5-14). 3. If you have selected an interlaced TV system in the MORE TRIGGER menu, you can press (ODD / EVEN) to swap between a line in the odd field and its corresponding line in the even field. The line counter decreases or increases accordingly. Using in Scope Mode NOTE When viewing signals from an interlaced video system, you may need to use the 4-field sequence function to get a stable display, as described in the next section, "Using the 4-Field Sequence Function". To begin the waveform display at some time before or after the trigger point, press (TIME DELAY) on the TV trigger menu; then use to increase or decrease the time delay. Note that the waveform shifts to the right or the left while doing so. Using the 4-field Sequence Function 5 - 19 In interlaced video systems the color information in a selected line may be alternating between two phases or between two amplitudes. If you use the 4-field sequence function, each second frame is discarded (i. e. the test tool displays the line in a 4-field sequence) and the alternating image gets stable. Using the AVERAGE WAVEFORM function (under the key), with the 4-field sequence function gives you more accurate measurements. [. . . ] Oscilloscope A device for viewing and diagnosing electrical signals such as waveforms. The highest and lowest voltage value of a Menu A list of choices on the display to select functions via the five function keys. Messages On-line information for the user, provided in situations where there is a conflict. Percentage of Pulse Width The ratio of signal on-time to its total cycle time, as measured in percent. Appendixes Probe Calibration A procedure that adjusts the ScopeMeter test tool internally to compensate for resistance variations between probes. Probes Measuring conductor that connects the ScopeMeter test tool to a circuit; specifically for use in the BNC jacks. [. . . ]