Kenwood 150HTM31 User Manual Download

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C S - 1 1 0 0 •

(100MHz DUAL TRACE OSCILLOSCOPE)

INSTRUCTION MANUAL

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Summary of Contents for 150HTM31

Page 1: ...C S 1 1 0 0 100MHz DUAL TRACE OSCILLOSCOPE INSTRUCTION MANUAL ...

Page 2: ...r or panel Refer servicing to qualified personnel CONTENTS SAFETY 2 FEATURES 3 SPECIFICATIONS 4 PREPARATION FOB USE 6 CONTROLS AND INDICATORS 8 FRONT PANEL 8 REAR PANEL 12 OPERATION 13 INITIAL STARTING PROCEDURE 13 1 NORMAL SWEEP DISPLAY OPERATION 13 2 MAGNIFIED SWEEP OPERATION 15 3 DELAYED SWEEP OPERATION ALTERNATING SWEEP OPERATION 15 4 X Y OPERATION 16 5 VIDEO SIGNAL OBSERVATION 16 6 SINGLE SWE...

Page 3: ...le scale Delay sweep mode is available to observe the portion of waveform with magnification as necessary Single sweep permits viewing and photographing one time events The delay line permits viewing of leading edge of high frequency fast risetime pulses The VIDEO synchronization circuit permits to observe video signal easily x 10 magnification and alternating sweep are provid ed The 20 MHz bandwi...

Page 4: ...ng Vertical system bandwidth with the 20 MHz BW push button switch pushed is ap proximately 20 MHz HORIZONTAL AXIS Input thru CH2 Operating Modes With HORIZ DISPLAY switch X Y operation is selectable C H 1 Y a x i s CH2 X axis Sensitivity Same as vertical axis CH2 Accuracy Same as vertical axis CH2 Input Impedance Same as vertical axis CH2 Frequency Response DC DC to 5 MHz 3 dB AC 5 Hz to 5 MHz 3 ...

Page 5: ...es automatically selected at A sweep times of 50 is div to 20 ns div and FRAME sync vertical sync pulses automatically selected at A sweep times of 0 5 s div to 0 1 ms div Polarity Trigger Sensitivity External trigger Input impedance 1 MO approx 40 pF A Maximam Input Voltage 250 V dc ac peak CALIBRATING VOLTAGE 1 V 2 square wave positive polarity 1 kHz 3 INTENSITY MODULATION Sensitivity TTL compat...

Page 6: ...is applied or set up the scope for spot blanking 2 Never cover the ventilating holes on the top of the oscilloscope as this will increase the operating temperature inside the case 3 Never apply more than the maximum rating to the oscilloscope inputs CH1 CH2 INPUT jacks 500 Vp p or 250 V dc ac peak EXT TRIG INPUT jack 250 V dc ac peak Z axis INPUT jack 50 V dc ac peak Never apply external voltage t...

Page 7: ...t 50 Hz Rated 16 amp 1 2 A 250 V Fast blow 5 x 20 mm None E30 1819 05 U K 240 volt 50 Hz Rated 13 amp 1 2 A 250 V Fast blow 5 x 20 mm 1 2 A Type C Australian 240 volt 50 Hz Rated 10 amp 1 2 A 250 V Fast blow 5 x 2 0 mm None E30 1821 05 North American 240 volt 60 Hz Rated 15 amp 12 amp max NEC 1 2 A 250 V Fast blow AGC 3AG None Switzerland 240 volt 50 Hz Rated 10 amp 1 2 A 250 V Fast blow AGC 3AG 5...

Page 8: ...ulled out the VOLTS DIV setting is multiplied by five and for X Y operation the Y axis sensitivity is multiplied accordingly In x 5 GAIN mode the vertical gain is increased and the trace becomes thickness 4 AC GND DC Switch Three position lever switch which operates as follows AC Blocks dc component of channel 1 input signal GND Opens signal path and grounds input to vertical amplifier This provid...

Page 9: ...nd CH2 ADD The waveforms from channel 1 and channel 2 input signals are added and the sum is displayed as a single trace When the CH2 INV Q button is engaged the waveform from channel 2 is subtracted from the channel 1 waveform and the difference is displayed as a single trace I NOTE The various vertical mode settings are related to horizontal mode and trigger source See the section on HORIZ DISPL...

Page 10: ... a trigger source ADD The algebraic sum of channel 1 and channel 2 signal is the trigger source If CH2 INV engaged the difference becomes the trigger source ALT Display is alternately triggered by CH1 and CH2 CHOP The display cannot be synchronized with the input signal since the chopping signal becomes the trigger source CH1 Sweep is triggered by channel 1 signal regardless of vertical MODE selec...

Page 11: ...ep time adjustment In the fully clockwise CAL position the sweep time is calibrated No fine adjustment is available for the B sweep time POSITION FINE PULL x 10 MAG Controls Rotation adjusts horizontal position of trace For X Y opera tion this controls have no effect P O S I T I O N Horizontal position coarse adjustment FINE PULL x 10 MAG Rotation becomes fine adjustment of horizontal position of ...

Page 12: ...k CH1 vertical output signal connector This connector is used to measure the frequency by con necting the frequency counter H Power Connector The input connector for the ac power cord Fuse Holder Contains the line fuse Verify that the proper fuse is install ed 1 2 A Feet Cord Wrap Feet support oscilloscope in vertical position face up and serve as cord wrap for storing power cord 1 2 ...

Page 13: ... the above procedure In the ADD mode the algebraic sum of CH1 CH2 is displayed If the CH2 INV switch has been engag ed the algebraic difference of the two waveforms CH1 CH2 is displayed If both channels are set to the same VOLTS DIV the sum or difference can be read directly in VOLTS DIV from the CRT In the ALT or CHOP modes allow simultaneous observa tion of channel 1 and channel 2 waveforms In t...

Page 14: ...of the position of vertical MODE If the SOURCE switch is set to the LINE position triggering is derived from the input line voltage This is useful measurements that are related to line fre quency External Sync When the SOURCE selection is in EXT the input signal at the EXT TRIG jack becomes the trigger This signal must have a time or frequency relationship to the signal be ing observed to synchron...

Page 15: ...ing divided by 10 3 DELAYED SWEEP OPERATION ALTERNATING SWEEP OPERATION Delayed sweep operation is achieved by use of both the A sweep and the B sweep Procedure 1 First select the HORIZ DISPLAY switch to A and adjust for a normal waveform display 2 Pull out the SLOPE control to set the B MODE to in itiate the STARTS AFTER DELAY mode Select the HORIZ DISPLAY switch to ALT mode and the B sweep will ...

Page 16: ... horizontal sync pulse for sweep triggering when viewing composite video waveforms In the LINE position 50 jts div to 20 ns div horizontal sync pulses are selected as triggers to permit viewing of horizontal line of video In the FRAME 0 5 s div to 0 1 ms div position vertical sync pulses are selected as triggers to permit viewing of vertical fields and frames of video When observing the video wave...

Page 17: ...al display of the waveform to be measured Set the VARIABLE control to CAL position 2 Set the trigger MODE switch to AUTO and AC GND DC to the GND position which established the zero volt reference Using the T POSITION control adjust the trace position to the desired reference level position making sure not to disturb this setting once made 3 Set the AC GND DC switch to the DC position to observe t...

Page 18: ...ken lines undesired component envelope Undesired component signal Substituting the given value Voltage between two points 4 4 div x 0 2 V x 10 8 8V 18 MEASUREMENT OF THE VOLTAGE BETWEEN TWO POINTS ON A WAVEFORM This technique can be used to measure peak to peak voltages Procedure 1 Apply the signal to be measured to the INPUT jack Set the vertical MODE to the channel to be used Set the AC GND DC s...

Page 19: ...ITION EXAMPLE For the example the horizontal distance between the two points is 5 4 divisions If the SWEEP TIME DIV is 0 2 ms div we calculate See Fig 15 Substituting the given value Time 5 4 div x 0 2 ms 1 08 ms F R E Q U E N C Y M E A S U R E M E N T S Frequency measurements are made by measuring the period of one cycle of waveform and taking the reciprocal of this time value as the frequency Pr...

Page 20: ...tting x x M A G 10 value 1 1 10 Adjust to the vertical scale with o POSITION Align the waveform with the center using A POSITION Be sure that the correct 10 and 90 lines are us ed For such measurements the 0 10 90 and 100 points are marked on the CRT screen 0 Using the formula Risetime Horizontal distance div x SWEEP TIME DIV setting x x 10 MAG value 1 1 10 Pulse length at 50 Fig 18 Fig 17 EXAMPLE...

Page 21: ...EMENTS This procedure is useful in measurement of time dif ferences between two signals that are synchronized to one another but skewed in time Procedure 1 Apply the two signals to channel 1 and channel 2 INPUT jacks Set the vertical MODE switch to either ALT or CHOP mode Generally for low frequency signals CHOP is chosen with ALT used for high frequency signals 2 Select the faster of the two sign...

Page 22: ...re ac curacy is required the SWEEP TIME DIV may be changed and magnified without touching the VARIABLE control and if necessary the trigger level can be readjusted For this type of operation the relationship of one division to 4 5 no longer holds Phase difference is defined by the for mula as follows Phase difference Horizontal distance of new sweep range div x45 div New SWEEP TIME DIV setting x O...

Page 23: ...cient is then the period of the reference signal divided by the product of the number of divisions used in step 1 for setup of the reference and the setting of the SWEEP TIME DIV con trol Using the formula Sweep coefficient Period of the reference signal sec Horizontal width div x SWEEP TIME DIV setting Phase difference Expanded sweep waveform display Fig 23 Unknown signal Fig 24 2 The vertical ca...

Page 24: ... CAL position 2 Select the HORIZ DISPLAY to ALT and pull out the SLOPE switch to affect the STARTS AFTER DELAY mode Adjust T TRACE SEP control and the DELAY TIME MULT control for intensified display of the waveform to be measured 3 Using the B SWEEP TIME DIV adjust the display for in tensification of the entire jitter area of the waveform 4 Select the HORIZ DISPLAY to B DLY D Measure the width of ...

Page 25: ...of operation 1 Perform the above steps 1 through 3 2 Push the SLOPE switch to cancel the STARTS AFTER DELAY mode and set the B MODE to TRIGGER 3 Select the HORIZ DISPLAY to either ALT or B DLY D The apparent magnification will be the same as describ ed above D E L A Y E D S W E E P TIME M E A S U R E M E N T Using the B sweep high accuracy time measurements can be made 1 Apply a signal to INPUT ja...

Page 26: ... waveform 4 Using the DELAY TIME MULT adjust the display so that the intensified portion touches the center horizontal graduation line of the CRT screen and record the dial setting at this point 5 Using the DELAY TIME MULT adjust the falling edge of the pulse so that it touches the center horizontal gradua tion line and is intensified The pulse width is the second dial reading minus the first dial...

Page 27: ...ENT OF RISETIMES AND FALLTIMES Risetimes and falltimes are generally measured by using the 10 and 90 amplitude points as reference starting and ending points for the rise or fall 1 Apply the signal to the INPUT jack and set the vertical MODE to the channel to be used Use the VOLTS DIV and VARIABLE controls to obtain a normal 6 divisions vertical amplitude waveform A Using the w POSITION control se...

Page 28: ...culations bas ed on the Lissajous patterns obtained using X Y operations Distortion due to non linear amplification also can be displayed A sine wave input is applied to the audio circuit being tested The same sine wave input is applied to the vertical input of the oscilloscope and the output of the tested cir cuit is applied to the horizontal input of the oscilloscope The amount of phase differen...

Page 29: ... a Lissajous pattern shows the ratio between the two frequencies Unknown frequency to Vertical input Standard frequency to Horizontal input See note Ratio of unknown to standard 1 1 1 1 2 1 6 1 Note Any one of these figures depending upon phase relationship Fig 37 Lissajous waveforms used for frequency measurement No amplitude distortion no out of phase Amplitude distortion no out of phase 180 out...

Page 30: ...top side of the case with the snaps at the top 3 Attach the four corners of the retainer plate to the oscilloscope case with the four nylon rivets supplied 4 Attach the probe pouch to the retainer plate using the snap fastener INSTALUNG PROBE HOLDER The probe holder is attached to the handle as shown in Fig 4 1 Install the probe holder as follows 1 Rest the upper two claws of the probe holder on t...

Page 31: ...A product of KENWOOD CORPORATION 17 5 2 chome Shibuya Shibuya ku Tokyo 150 Japan PRINTED IN JAPAN B50 7535 20 T 87 121110987654321 86 12111098765 ...

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