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Find the nominal input channel impedance of the TDS2002C and TBS1052B-EDU and also the maximum frequency...

Find the nominal input channel impedance of the TDS2002C and TBS1052B-EDU and also the maximum frequency that the DSO is able to measure reliably. What happens to measurement of signals close to the maximum frequency?

Engineering   Electrical-Engineering   
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Answer #1

The input Channel Impeence with DSO --> TBS1052B-EDU is 1 Mega Ohm and Max. Freq. is 50 MHz . See Page-6 at https://www.tek.com/sites/default/files/media/media/resources/TBS1000B-EDU-Series-Oscilloscope-Datasheet-2_0.pdf

The input Channel Impeence with DSO --> TBS2002C is 1 Mega Ohm also and max. Freq. 70 MHz. See Page-6 at

http://www.testequipmenthq.com/datasheets/TEKTRONIX-TDS2002C-Datasheet.pdf

A 50 Mhz or 70 MHz DSO indiactes its bandwitdth for signal measurement and indicates the point where the measured amplitude decreases by -3 db (70.7 %). A signal with freq. close to max. freq. will show the amplitude 70.7 % of the actual amplitude. Therefore at 5V signal will actually show up as 3.5V, and 3.3V will show up as 2.3V.

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