开云体育

2400 series of scopes -- automatic voltage measurement

Steve #87829 Looking for confirmation of my understanding of the Tek specs for automatic voltage measurement in the 2400 series scopes. Am I right in understanding that automatic voltage measurement is spec'ed to 1MHz? And that it is not spec'ed to function accurately above 1MHz? That's what I get from my reading of the the catalog pages and the service manual. Am I reading those documents correctly? Thanks. Steve
David Hess Member Profile All Messages By This Member #87832 That is a good question. The similar 100 MHz 2247A specifications divide the total bandwidth into two frequency ranges at 25 MHz and say that peak voltage measurements above 25 MHz follow the trigger response curve. The 2445B/2455B/2465B/2467B specifications mention a 10ns minimum pulse with and a maximum sine wave frequency of 1 MHz. Maybe those two oscilloscope designs are too different to compare. On Mon, 18 Feb 2013 20:02:46 -0500, Steve <steve65@...> wrote: Looking for confirmation of my understanding of the Tek specs for automatic voltage measurement in the 2400 series scopes. Am I right in understanding that automatic voltage measurement is spec'ed to 1MHz? And that it is not spec'ed to function accurately above 1MHz? That's what I get from my reading of the the catalog pages and the service manual. Am I reading those documents correctly? Thanks. Steve
victor.silva All Messages By This Member #87837 I assume you mean a 2445A/65A/67 and 2445B/65B/67B. I know the 24xx Digital Scopes have no such limit. I just tried using a 1.2V sine wave and was able to measure pk-pk accurately to over 200MHz. Maybe it depends on the signal amplitude. --Victor toggle quoted message Show quoted text --- In TekScopes@..., Steve <steve65@...> wrote: Looking for confirmation of my understanding of the Tek specs for automatic voltage measurement in the 2400 series scopes. Am I right in understanding that automatic voltage measurement is spec'ed to 1MHz? And that it is not spec'ed to function accurately above 1MHz? That's what I get from my reading of the the catalog pages and the service manual. Am I reading those documents correctly? Thanks. Steve
Steve #87859 Hi Victor, Yes, I was referring specifically to a 2456B. TEK specifications indicate that the automatic voltage reading is good up to 1MHz. Interesting that you are seeing it function up to 200MHz. Thanks. Steve toggle quoted message Show quoted text On 2/18/2013 10:33 PM, victor_j_silva wrote: I assume you mean a 2445A/65A/67 and 2445B/65B/67B. I know the 24xx Digital Scopes have no such limit. I just tried using a 1.2V sine wave and was able to measure pk-pk accurately to over 200MHz. Maybe it depends on the signal amplitude. --Victor --- In TekScopes@..., Steve <steve65@...> wrote: Looking for confirmation of my understanding of the Tek specs for automatic voltage measurement in the 2400 series scopes. Am I right in understanding that automatic voltage measurement is spec'ed to 1MHz? And that it is not spec'ed to function accurately above 1MHz? That's what I get from my reading of the the catalog pages and the service manual. Am I reading those documents correctly? Thanks. Steve ------------------------------------ Yahoo! Groups Links
victor.silva All Messages By This Member #87873 Are you referring to Page 1-11, Volts, Maximum sine-wave frequency? This is very confusing because here it actually says greater than or equal to 1MHz. --Victor toggle quoted message Show quoted text --- In TekScopes@..., Steve <steve65@...> wrote: Hi Victor, Yes, I was referring specifically to a 2456B. TEK specifications indicate that the automatic voltage reading is good up to 1MHz. Interesting that you are seeing it function up to 200MHz. Thanks. Steve On 2/18/2013 10:33 PM, victor_j_silva wrote: I assume you mean a 2445A/65A/67 and 2445B/65B/67B. I know the 24xx Digital Scopes have no such limit. I just tried using a 1.2V sine wave and was able to measure pk-pk accurately to over 200MHz. Maybe it depends on the signal amplitude. --Victor --- In TekScopes@..., Steve <steve65@> wrote: Looking for confirmation of my understanding of the Tek specs for automatic voltage measurement in the 2400 series scopes. Am I right in understanding that automatic voltage measurement is spec'ed to 1MHz? And that it is not spec'ed to function accurately above 1MHz? That's what I get from my reading of the the catalog pages and the service manual. Am I reading those documents correctly? Thanks. Steve ------------------------------------ Yahoo! Groups Links
David Hess Member Profile All Messages By This Member #87874 The 24xx digital scopes lack any such limit because they make measurements in a completely different matter. What I wonder is why the 2247A series which do operate in a similar way do not have such a limit listed. If the peak detection circuit in the 2465B series is good down to the specified 10ns, then I have no idea what the 1 MHz restriction refers to. Those two specifications seem to conflict. On Tue, 19 Feb 2013 03:33:14 -0000, "victor_j_silva" <daejon1@...> wrote: I assume you mean a 2445A/65A/67 and 2445B/65B/67B. I know the 24xx Digital Scopes have no such limit. I just tried using a 1.2V sine wave and was able to measure pk-pk accurately to over 200MHz. Maybe it depends on the signal amplitude. --Victor --- In TekScopes@..., Steve <steve65@...> wrote: Looking for confirmation of my understanding of the Tek specs for automatic voltage measurement in the 2400 series scopes. Am I right in understanding that automatic voltage measurement is spec'ed to 1MHz? And that it is not spec'ed to function accurately above 1MHz? That's what I get from my reading of the the catalog pages and the service manual. Am I reading those documents correctly? Thanks. Steve

Previous Topic Next Topic