Страница 1: ...l 7040A SPECIFICATIONS Vertical Amplifiers Ch l 2 Bandwidth 3 dB DC coupled DC to 40 MHz normal DC to 7 MHz magnified AC coupled 10 Hz to 40 MHz normal 10 Hz to 7 MHz magnified Risetime 8 8 nS normal 50 nS magnified Deflection Coefficients 5 mV div to 5 V div in 10 calibrated steps of a 1 2 5 sequence Continuously variable between steps highest uncalibrated deflection factor is at least 12 5 V div...
Страница 2: ... 50 kHz Same as Vertical Amplifier Main timebase only Main timebase intensified B timebase delayed B timebase triggered 0 2 uS div to 0 2 S div in 19 calibrated steps of a 1 2 5 sequence Uncalibrated continuously variable control extends deflection factor to at least 0 5 S div Magnifier extends fastest sweep rate to 100 nS div 0 2 uS div to 20 uS div in 7 calibrated steps of a 1 2 5 sequence Magni...
Страница 3: ...mpedance Maximum Input Voltage CHI CH2 Line External AC HF Reject LF Reject DC Auto Normal TV V TV H or Variable Negative 30 Hz to 5 MHz 0 5 div 5 MHz to 40 MHz 1 5 divs 30 Hz to 5 MHz 0 2V 5 MHz to 40 MHz 0 8 V At least 1 div or l OV 1 megohm in parallel with approx 30 pF 300 V DC peak AC 500 mV p p 3 Approx 1000 Hz Square wave Positive going signal decreases intensity 5 V signal causes noticeabl...
Страница 4: ... Line Voltage Line Frequency Power Consumption Supplied Accessories Operater s Manual Direct Low capacitance Probes fuse AC Power Cord 6 inch square tube Approx 12 kV P31 standard Internal 1 cm square divisions 8 divisions high 10 divisions wide Illuminated 11 6 X 5 8 X 15 inches 290 X 145 X 375mm Approx 18 7 1bs 8 5 kg 10 to 35 t 50 to 95 F 0 to 40 t 32 to 104 F 20 to 70 t 4 to 158 F 45 to 85 35 ...
Страница 5: ... 4 4 b 30 1IlL _ 32 FIGU RE 2 1 FRONT PAN EL ITEMS OUWUT 0 0 OSCILLOSCOPE OS 7040A GoldStor Precision CO Ltd I IADE IN KOREA 0 0 POWER C JtSUWPTlON APPR025W WARNING 0 0 FIGURE 2 2 REAR PAN EL ITEMS 0 0 0 0 ...
Страница 6: ...section The following descriptions are keyed to the items called out in Figures 2 1 and 2 2 2 1 1 Display and Power Blocks Item Function 1 POWER switch Push in to turn instrument power on and off 2 POWER lamp Lights when power is on 3 INTEN control Adjusts the brightness of the CRT display Clockwise rotation increases brightness 4 FOCUS control To obtain maximum trace sharpness 5 ROTATION control ...
Страница 7: ...lished DC position connects the amplifier directly to its input connector thus passing all signal components on to the amplifier To select the method of coupling the input signal to the CH2 vertical amplifier To select the calibrated deflection factor of the input signal fed to the CH1 vertical ampli fier To select the calibrated deflection factor of the input signal fed to the CH2 vertical amplif...
Страница 8: ...ion displays only the channel 1 input signal on the CRT screen CH2 position displays only the channel 2 input signal on the CRT screen ALT position displays the input signals of both channels 1 and 2 The CRT beam is switched between channels at the end of each sweep to achieve this multi channel display CHOP position displays the input signals of both channels 1 and 2 The CRT beam is switched betw...
Страница 9: ...occuring after the delay time determined by the A TIME DIV switch and the DELAY TIME POS controL To select either the calibrated sweep rate of the main A timebase the delay time range for delayed sweep operation or X Y operation To select the calibrated sweep rate of the delayed B timebase To determine the exact starting point within the A timebase delay range at which the B timebase will begin sw...
Страница 10: ...ect the frequency characteristics of the trigger circuit coupling AC position inserts a large capacitor in the trigger coupling chain to remove and DC com ponent from the trigger signal HF REJ position inserts a filter in the trigger coupling chain that removes signal components higher than 4 kHz Use this position to elimin ate high frequency noise LF REJ position inserts a filter that removes sig...
Страница 11: ...nal for initiating sweep Pushed in the switch selects the positive slope When pulled this switch selects the negative slope Lights when the sweep generator is being trig gered Allows triggering on certain complex signals by changing the holdoff dead time of the main A sweep This avoids triggering on intermediate trigger points within the repeti tion cycle of the desired display The holdoff time in...
Страница 12: ...urces and equipment having output connectors The outer conductor of the cable shields the central signal conductor from hum and noise pickup These cables are usually fitted with BNC connectors on each end and specialized cable and adaptors are readily available for mating with other kinds of connectors Scope probes are the most popular method of connecting the oscilloscope to cir cuitry These prob...
Страница 13: ...g cables of nearly and practical length without signal loss If a low resistance ground connection between oscilloscope and circuit is not established enormous amounts of hum will appear in the displayed signal Generally the outer conductor of shielded cable provides the ground connection If you are using plain lead wire be certain to first connect a ground wire between the Model 7040A Ground conne...
Страница 14: ...E POWER switch 1 ON pushed in AC GND DC switches 11 12 AC Vertical POSITION controls 19 20 Mid rotation and pushed in VARIABLE controls 15 16 Fully CW and pushed in V MODE switch 21 CHI CH2 HORIZ DISPLAY switches 23 A A VARIABLE control 27 Fully CW and pushed in Trigger MODE switch 30 AUTO Trigger SOURCE switch 32 CHI CH2 Trigger COUPLING switch 31 AC Trigger LEVEL control 34 Mid rotation HOLDOFF ...
Страница 15: ... in frequency that AC coupling attenuates or distorts the signal flip the AC GND DC switch 11 or 12 to DC CAUTION If the observed waveform is low level AC make certain it is not riding on a high amplitude DC voltage You will also have to reset the Trigger MODE switch 30 to NORM if the signal frequency is below 25 Hz and possibly readjust the Trigger LEVEL control 34 2 3 3 Dual trace Operation Dual...
Страница 16: ...iZontal lignal pulee 1V VerticIl SYNC pulse a composite video I b TV V coupling l NEGATIVE POlARI TV SVNCHROOIZATIOO I c TV H coupling 1 I I J 1 l t U I JC 1 I i 0 I i d sync polarity f FIGURE 2 4 USING THE 1V SYNC SEPARATOR ...
Страница 17: ...gle horizontal line with no signal and a vertically deflected but non synchronized display when vertical signal is present but the trigger controls are improperly set This immediately indicates what is wrong The only hitch with AUTO operation is that signals below 25 Hz cannot and complex signals of any frequency may not reliably trigger the timebase Therefore the usual practice is to leave the Tr...
Страница 18: ... that has only the trailing edge jitter of the original signal If you are ever in doubt or have an unsatisfactory display try both slopes to find the best way The LEVEL control determines the point on the selected slope at which the main A timebase will be triggered The effect of the LEVEL control on the displayed trace is shown in Figure 2 5C The 0 and panel markings for this control refer to the...
Страница 19: ...STARTING AT POSITIVE SLOPE STARTING AT NEGATIVE SLOPE a SAWTOOTH WAVEFORM STABLE RISING TI I AT STARTING NEGATIVE SLOPE FALLING PORTION 1117J1mRl STARTI pOSITIVE S NG AT LOPE b SQUARE WAVEFORM 0 SLOPE c TRIGGER LEVEL I FIGURE 2 5 TRIGGER SLOPE SELECTION _i ...
Страница 20: ...e single trace resulting is the algebraic sum of the CHI and CH2 signals Either of both of the Vertical POSITION controls 19 and 20 can be used to shift the resultant trace NOTE If the input signals are in phase the amplitude of the resultant trace will be the arithmetic sum of the individual traces eg 42 div 1 2 div 5 4 div If the input signals are 180 out of phase the amplitude will be the diffe...
Страница 21: ...cted spot damage the CRT phosphor 2 Apply the vertical signal to the CH2 or Y IN connector 10 and the hori zontal signal to the CHI or X IN connector 9 Once the trace is deflected restore normal brightness 3 Adjust the trace height with the CH2 VOLTS DIV switch 14 and the trace width with the CHI VOLTS DIV SWITCH 13 The PULL X5 MAG switches 15 and 16 on the VARIABLE controls can be used if greater...
Страница 22: ... out 3 Press the A INT HORIZ DISPLAY pushbutton 23 A section of the trace s will brighten NOTE The intensified portion will be quite small if there is a large difference between the setting of the A and B TIME DIY switches 4 Turn the B TIME DIY switch 25 until the intensified portion of the trace widens to an amount equal to the portion of the trace you wish to magnify see Figure 2 6b 5 Turn the D...
Страница 23: ...l delay time will be that plus the additional time until the next available trigger The result is that actual delay time is variable only with step resolution in increments of the interval between triggers The maximum magnification possible by this technique is several thousand times CRT brightness being the limiting factor For triggered B sweep proceed as follows 1 Set up the scope for basic dela...
Страница 24: ... 1 10 I c B TIMEBASE DISPLAY 90 T a A TIMEBASE DISPLAY INTENSIFIED PORTION OF A SWEEP b A INTENSIFIED BY B DISPLAY I l fIIioot l PELAY TIME r I I I I 11 FIGURE 2 6 SWEEP MAGNIFICATION BY THE B TIME BASE ...
