| Products > Test Equipment |
| A review of the GWInstek 1054B |
| << < (4/16) > >> |
| saturation:
Welcome, I've had some for a while never posted. I'm not sure if my FM generator is good past 25 MHz; Vo likely drops with higher frequency. Here's a crude frequency response curve I generated some time back and never posted. This is the raw dBVpp and dBV using the DSO's native RMS calculator. Its consistent with a typical -6dB/octave low pass filter with 66 MHz at -3dB point. Response from a Tek 284 pulse generator. Between 6ns and 3 ns, called it 4.5ns or 0.35/4.5 = 78 MHz, consistent with the frequency test. --- Quote from: whited on December 16, 2016, 01:13:05 am ---Glad you are sharing screenshots, saturation. Is source waveform amplitude the same for all 3 carrier frequencies? It looks like -40dbv attenuation from 1MHz to 75MHz? That's a lot. Or maybe it's happening before the scope or I am missing something? Instek has not yet replied regarding serial decode app for 1000B. It has only been 1 day though. Perhaps there is not enough memory as mentioned. --- End quote --- |
| saturation:
Yes, the VPO is a major improvement over its prior models, but it still could be improved further with a firmware tweak. Some waveforms looks better than others, but my view is against my old Trio CRT. The fast update rate makes it much easier to see transients. I think if zero intensity were made truly zero it will help a lot, it would give the adjust for 'contrast' a greater span and act much more like a true CRT intensity adjust. --- Quote from: wraper on December 15, 2016, 02:18:55 am --- --- Quote from: saturation on December 15, 2016, 02:09:02 am ---Both uses VPO, but Rigol's is far superior as far as CRT like view. I think Instek can improve on this easily, they need to increase the contrast options to the variable persistence, what exists barely changes the appearance. --- End quote --- Dunno, at least on 2000E, you set persistence to minimum setting (16ms) and get pretty much Rigol like "analog view". Except zero intensity is not really zero, so won't completely hide "low intensity" waveforms. --- End quote --- |
| wraper:
--- Quote from: saturation on December 16, 2016, 12:23:08 pm ---I think if zero intensity were made truly zero it will help a lot, it would give the adjust for 'contrast' a greater span and act much more like a true CRT intensity adjust. --- End quote --- And what is practical use for it? |
| nctnico:
--- Quote from: wraper on December 16, 2016, 12:39:06 pm --- --- Quote from: saturation on December 16, 2016, 12:23:08 pm ---I think if zero intensity were made truly zero it will help a lot, it would give the adjust for 'contrast' a greater span and act much more like a true CRT intensity adjust. --- End quote --- And what is practical use for it? --- End quote --- None. Actually it is rather counter productive to want to have a dim (invisible) signal on a DSO! Fortunately GW Instek didn't hop on the 'emulate a CRO display' band wagon but went the practical way instead by starting at (approx.) 50% intensity and go from there. Ofcourse you can turn the trace intensity down to invisible. |
| whited:
Yes this makes more sense. Above I missed memory segmentation in my 2000E diff list. You mentioned it too. I am adding to my list (since it's there, so I don't forget). --- Quote from: saturation on December 16, 2016, 03:18:03 am ---Welcome, I've had some for a while never posted. I'm not sure if my FM generator is good past 25 MHz; Vo likely drops with higher frequency. Here's a crude frequency response curve I generated some time back and never posted. This is the raw dBVpp and dBV using the DSO's native RMS calculator. Its consistent with a typical -6dB/octave low pass filter with 66 MHz at -3dB point. Response from a Tek 284 pulse generator. Between 6ns and 3 ns, called it 4.5ns or 0.35/4.5 = 78 MHz, consistent with the frequency test. --- Quote from: whited on December 16, 2016, 01:13:05 am ---Glad you are sharing screenshots, saturation. Is source waveform amplitude the same for all 3 carrier frequencies? It looks like -40dbv attenuation from 1MHz to 75MHz? That's a lot. Or maybe it's happening before the scope or I am missing something? Instek has not yet replied regarding serial decode app for 1000B. It has only been 1 day though. Perhaps there is not enough memory as mentioned. --- End quote --- --- End quote --- |
| Navigation |
| Message Index |
| Next page |
| Previous page |