User manual TEKTRONIX 2212 QUICK REFERENCE

[. . . ] Rise-time amplitude and measurement points are indicated at the left edge of the graticule. PROBE ADJ Connector-Provides an approximately 0. 5 V, negative going, square-wave voltage (at approximately 1 kHz) that permits the operator to compensate voltage probes and to check operation of the oscilloscope vertical system. It is not intended to verify the accuracy of the vertical gain or time-base calibration. 5 0 2 0 3 0 BEAM FIND Switch-When held in, compresses the display to within the graticule area and provides a visible viewing intensity to aid in locating off-screen displays. POWER Switch-Turns instrument power on and off. Press in for ON; press again for OFF. 6 0 AUTO FOCUS Control-Adjusts display for optimum definition. Once set, the focus of the crt display will TRACE ROTATION Control-Screwdriver control used to align the crt trace with the horizontal graticule lines. 7 0 AUTO INTENSITY Control-Adjusts brightness of the crt display. [. . . ] Set both the CH 1 and CH 2 VOLTS/DlV switches to 2 (1X). Note that the dots are now separated by 2. 5 horizontal divisions and 2. 5 vertical divisions. 5. Return the SEC/DIV switch to 0. 5 ms and adjust the AUTO INTENSITY control for desired display brightness. REV OCT 1981 2212 Operators Using the Z-Axis Input 1. Disconnect the dual-input coupler from the CH 2 input connector and connect a bnc-female-to-bnc-female adapter to the disconnected end of the coupler. 4. Adjust the A TRIGGER LEVER control for a stable display, and AUTO INTENSITY for desired display brightness. If necessary, adjust VERTICAL VOLTS/DIV control to obtain 5 divisions or greater amplitude for a stable display. Connect a 42-inch, 50-a bnc cable from the Z - A X I S INPUT connector (located on the rear panel) to the dualinput coupler via the bnc-female-to-bnc-female adapter. Set the Channel 1 VOLTS/DIV switch to 1 (IX) and adjust the output of the calibration generator to provide a 5-division display. Observe that the positive peaks of the waveform are blanked, indicating intensity modulation (adjust AUTO INTENSITY control as necessary). Disconnect the 50-a cable from the Z-AXIS INPUT connector and disconnect the dual-input coupler from the CH 1 input connector. 1. Perform Step 1 under Displaying a TV Line-rate Signal. 2. Set both VOLTS/DIV switches to 0. 1 (10X PROBE) and set both AC-GND-DC switches to DC. Select CH 1 VERTICAL MODE and insert the tip of the Channel 1 probe in the PROBE ADJUST output jack. Using the approximately 1-kHz PROBE ADJUST square-wave signal as the input, obtain a display of the Instrument Familiarization" ). Set the SEC/DIV switch to display several cycles of the PROBE ADJUST signal. Use the Channel 1 POSITION control to vertically center the display. Check the waveform presentation for overshoot and rolloff (see Figure 10). If necessary, adjust the probe compensation for flat tops on the waveforms. Refer to the instructions supplied with the probe for details of compensation adjustment. Figure 10. Probe compensation. OVER COMPENSATED (OVERSHOOT) UNDER COMPENSATED (ROLLOFF) 465/DM-O-5 8. Select CH 2 VERTICAL MODE and connect the Channel 2 probe tip to the PROBE ADJUST output jack. Use the Channel 2 POSITION control to vertically center the display and repeat step 7 for the Channel 2 probe. BASIC APPLICATIONS After becoming familiar with all the capabilities of the 2212 Oscilloscope, the operator can then adopt a convenient method for making a particular measurement. [. . . ] A 400 V (dc + peak ac) or 800 V p-p ac at 1 kHz or less. a 1 MQ_+2%a . Input Resistance Input Capacitance AC Coupled LEVEL Control Range (with NORM TRIGGER MODE) INT EXT and DC 30 pF +3 PF. ~ 10 Hz or less at lower -3 dB point. a On screen limits. a At least +2 V (4 V p-~). ~ aPerformance Requirement not checked in Service Manual. 28 2212 Operators Table 2 (cont) Characteristics I Performance Requirements TRIGGER SYSTEM (cont) Supplemental Information LEVEL Control Range (with NORM TRIGGER MODE) (cont) EXT and DC+ 10 VAR HOLDOFF Control Range At least 520 V (40 V p-~). ~ Increases sweep holdoff time by at least a factor of four. a HORIZONTAL DEFLECTION SYSTEM Sweep Rate Calibrated Range A Sweep 0. 5 s per division to 0. 05 pus per division in a l-2-5 sequence. Xl 0 Magnifier extends maximum sweep speed to 5 ns per division. Unmagnified +3% Accuracy +2o" to +3o" c c 0" c to +5o" c I Magnified +5% +6%a Sweep accuracy applies over the center 8 divisions. Exclude the first 50 ns of the sweep for both magnified and unmagnified sweep speeds and exclude anything beyond the 100th magnified division. POSITION Control Range Start of sweep to 100th division will position past the center vertical graticule line with X10 Magnifier. [. . . ]