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. [. . . ] 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. Set A SEC/DIV to 2 ms, A TRIGGER MODE to TV FIELD and A & B INT to CH 1 or CH 2 as appropriate for the applied signal. To display either Field 1 or Field 2 individually at faster sweep rates (displays of less than one full field), set VERTICAL MODE to BOTH and ALT simultaneously. This synchronizes the Channel 1 display to one field and the Channel 2 display to the other field. To change the field that is displayed, interrupt the triggering by repeatedly setting the AC GND DC switch to GND or disconnecting the signal from the applied signal input until the other field is displayed. To display both fields simultaneously, apply the input signal to both the CH 1 and CH 2 inputs via two probes, two cables, or through a dual-input coupler. To examine either a TV Field-rate or Line-rate signal in more detail, either the X10 Magnifier or HORIZONTAL MODE functions may be employed as described for other signals elsewhere in this manual. TV SIGNAL DISPLAYS Displaying a TV Line-rate Signal 1. 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. The following information describes the recommended procedures and techniques for making basic measurements with your instrument. When a procedure first calls for presetting instrument controls and obtaining a baseline Instrument Familiarization" section trace, refer to the " and perform steps 1 through 4 under " Baseline Trace. " 2. Apply the ac signal to either vertical-channel input connector and set the VERTICAL MODE switch to display the channel used. Set the appropriate VOLTS/DIV switch to display about five divisions of the waveform, ensuring that the VOLTS/DIV Variable control is in the CAL detent. 4. Adjust the TRIGGER LEVEL control to obtain a stable dispaly. NONDELAYED MEASUREMENTS AC Peak-to-Peak Voltage To perform a peak-to-peak voltage measurement, use the following procedure: 5. Set the SEC/DIV switch to a position that displays several cycles of the waveform. NOTE 6. Vertically position the display so that the negative peak of the waveform coincides with one of the horizontal graticule lines (see Figure 11, Point A). This procedure may also be used to make voltage measurements between any two points on the waveform. 7. Horizontally position the display so that one of the positive peaks coincides with the center vertical graticule line (see Figure 11, Point B). Measure the vertical deflection from peak to peak (see Figure 11, Point A to Point B). 16 REV OCT 1981 2212 Operators 2. Apply the signal to either vertical-channel input connector and set the VERTICAL MODE switch to display the channel used. POSITION TO CENTERLINE 3. [. . . ] Pulse jitter. SPECIFICATION The following electrical characteristics (Table 2) are valid for the 2212 when it has been adjusted at an ambient temperature between +20°C and +30°C, has had a warm-up period of at least 20 minutes, and is operating at an ambient temperature between 0°C and +50°C (unless otherwise noted). performance characteristics for which no absolute limits are specified, or characteristics that are impractical to check. Environmental characteristics are given in Table 3. The 2212 meets the requirements of Ml L-T-288008, Class 5 equipment, except where otherwise noted. Item listed in the "Performance Requirements" column are verifiable qualitative or quantitative limits, while items listed in the "Supplemental Information" column are either explanatory notes, calibration setup descriptions, Physical characteristics of the instrument are listed in Table 4. 26 2212 Operators Table 2 Electrical Characteristics Characteristics I Performance Requirements VERTICAL DEFLECTION SYSTEM Supplemental Information Deflection Factor 1X gain adjusted with VOLTS/DIV switch set to 20 mV per division. 10X gain adjusted with VOLTS/DIV switch set to 2 mV per division. Range 2 mV per division to 10 V per division in a l-2-5 sequence. Accu racy +2o " to +3o " c c 0°C to +5o"c Range of VOLTS/Dl V Variable Control. [. . . ]