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Tektronix scope bandwidth?
开云体育I've never heard of that, either. The manuals of that period all use the conventional 3dB figure.Now, if the statement had been "Tek spec'd in-band flatness to a 1dB error band" out to where it finally rolls off, sure. But to specify the bandwidth as the 1dB roll off point would have driven Tek's marketing folks crazy, trying to explain to prospective buyers why a lower bandwidth number was actually better. Tom -- Prof. Thomas H. Lee Allen Ctr., Rm. 205 350 Jane Stanford Way Stanford University Stanford, CA 94305-4070 On 9/13/2022 11:15, Gary Johnson via
groups.io wrote:
I've never heard that. And I've measured the bandwidth of many a 'scope over the the last 40 years, always finding it to be -3 dB very close to the rated BW, and conforming to BW = .35/RT. |
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Paul
开云体育The +/- 1 dB was back in the Tek 453 scope days. ? Paul, W8AEF ? From: [email protected]
[mailto:[email protected]]
On Behalf Of Gary Johnson via
groups.io
Sent: Tuesday, September 13, 2022 11:16 AM To: [email protected] Subject: Re: [Test Equipment Design & Construction] Tektronix scope bandwidth? ? I've never heard that. And I've measured the bandwidth of many a 'scope
over the the last 40 years, always finding it to be -3 dB very close to the
rated BW, and conforming to BW = .35/RT. |
开云体育Also one place that Tek over speced their bandwidth that drive other vendors crazy was in the probes. A 100Mhz Tek probe can be used to 100Mhz with no roll off this is not true of all probes as a 100Mhz probe on a 100Mhz scope could lower the system bandwith of the combination to something less than 100Mhz ? Eric ? From: [email protected] <[email protected]> On Behalf Of Paul via groups.io
Sent: Tuesday, September 13, 2022 5:37 PM To: [email protected] Subject: Re: [Test Equipment Design & Construction] Tektronix scope bandwidth? ? The +/- 1 dB was back in the Tek 453 scope days. ? Paul, W8AEF ? From: [email protected] [mailto:[email protected]] On Behalf Of Gary Johnson via groups.io ? I've never heard that. And I've measured the bandwidth of many a 'scope over the the last 40 years, always finding it to be -3 dB very close to the rated BW, and conforming to BW = .35/RT. |
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Rodger Bean
开云体育The vertical amplifier specs for the Tek 1480 waveform monitor were, frequency response; 50KHz – 5MHz ± 0.5% (or ± 0.043dB), and for amplitude on the 1V range; ± 3mV (or ± 0.026dB). ? From: [email protected] <[email protected]> On Behalf Of Eric
Sent: Wednesday, 14 September 2022 11:34 To: [email protected] Subject: Re: [Test Equipment Design & Construction] Tektronix scope bandwidth? ? Also one place that Tek over speced their bandwidth that drive other vendors crazy was in the probes. A 100Mhz Tek probe can be used to 100Mhz with no roll off this is not true of all probes as a 100Mhz probe on a 100Mhz scope could lower the system bandwith of the combination to something less than 100Mhz ? Eric ? From: [email protected] <[email protected]> On Behalf Of Paul via groups.io ? The +/- 1 dB was back in the Tek 453 scope days. ? Paul, W8AEF ? From: [email protected] [mailto:[email protected]] On Behalf Of Gary Johnson via groups.io ? I've never heard that. And I've measured the bandwidth of many a 'scope over the the last 40 years, always finding it to be -3 dB very close to the rated BW, and conforming to BW = .35/RT. |