| Products > Test Equipment |
| REVIEW - Rigol DS2072 - First Impressions of the DS2000 series from Rigol |
| << < (393/566) > >> |
| Fagear:
Yes, multifunctional knob is very touchy. Rarely it utilizes velocity of rotating. For example in Trigger -> Menu -> Setting -> Holdoff - it does. But most cases - no. Also it's a pity that trigger level knob doesn't use this feature. I think that waveform playback knob must act as multifunction knob because it is hardly used at all. And it is bigger and has fixed angles, good for selecting something. I've discovered some bugs (?) with MATH FFT funtion. After you turn on FFT (MATH -> Operate -> FFT) horizontal controls move and zoom the FFT graph. It's ok. But then press CH1 button and use horizontal scale knob. The FFT will scale with CH1 waveform as well and will shift to the side. Playing around with both horizontal knobs (rotating and pushing, while CH1 is selected) will force FFT graph to shift and jump around and sometimes to dissapear. To reposition FFT graph you need to press MATH, set required zoom and push POSITION to center the graph. Also with FFT turned on it is impossible to turn on "delayed sweep" by pushing SCALE horizontal control knob (with CH1 selected). But this may be a processing power limitation. With other MATH functions it's not a problem, "delayed sweep" turns on and works ok. Also if you turn on MATH -> Anti-Aliasing while in FFT graph will shift to the side and you have to recenter it by pushing horizontal POSITION knob. After turning Anti-Aliasing off you have to do it again. Strage. :-// When FFT is active you can not add any measurements, it's ok. But when you select something else in Operate box, measurement menu doesn't change color to MATH. To add some measurements on MATH you must push button of any channel and then press MATH again. Also I'd prefer to turn off MATH function in way that I can do it with CH1, CH2 and REF. If it is selected and I press its button, it turns off. If not selected it selects and if you press a button again - it turns off. But with MATH the button only selects MATH menu and opens/closes it. It doesn't turn it off, you have to go in MATH menu -> Operate and select OFF with that touchy knob. :-/O My unit: DS2072A, HW: 1.0.2.0.2, SW: 00.02.01.00.03 |
| Teneyes:
Back in July I reported to Rigol ======================= I wish to report a Bug! Using the FFT on the DS2000, the DSO must maintain the Center frequency selected at the center of the display as you change through span scales. At the start, an operator will set the span set widest to see peak, Then the operator will adjust the position so the peak (or point of interest) is at the center frequency After that ,the operator will narrow span and the display must spread the frequency holding the center frequency at the Center of the Display!!!. The DS2000 does NOT do this! The DSO moves the selected Peak way off the display, and Making the 'Pissed Off' User constantly needing to adjust the Center Frequency. ++++++++++++++++++++++++++++++++ This is Fixed Now :-+ |
| Fagear:
Something strange with trigger level. Attach CH1 probe to internal 1 kHz generator and push AUTO. Timebase sets to 200 us and vertical scale to 1 V/div (1:10 probe). Trigger is auto-set to 1.50 V. Set scale to 500 mV/div and set CH1 position to 1 div from bottom (POS: -1.5 V). Trigger is in the middle of the screen (same 1.50 V) and waveform is 6 divisions amplitude. Set trigger level to 500 mV (2 divisions from bottom). Now move CH1 waveform with POSITION knob to the bottom until trigger level dissapears from the screen (it will point that it is somewhere at the bottom). Continue moving waveform down until it is barely visible. Than return it back to 1 div from the bottom. Trigger level will be offset to the top somewhere (it was at 2.54 V in my case). This also happens with SCALE knob. Readjust trigger level to 500 mV (damn non-velocity sensitive knob!). Than adjust CH1 scale to 20 mV and then set it back to 500 mV. Once again, trigger level will be shifted, this time - down. To 160 mV in this case. :-BROKE So while trigger level stay on the screen, SCALE and POSITION of CH1 do not affect its level at all. But when trigger level dissapears from the screen it level starts to change. I think is strange. :-// In this case trigger level icon pointing "up" or "down" is pretty useless, because its previous setting is corrupted. It must stay on dialed level or clip withing screen with no "up" or "down" icon. :-// |
| marmad:
--- Quote from: Fagear on December 22, 2013, 04:04:12 pm ---I think that waveform playback knob must act as multifunction knob because it is hardly used at all. And it is bigger and has fixed angles, good for selecting something. --- End quote --- It does. Note the menu symbol for Navigation Knob from the DS2000 User Manual: |
| Rory:
--- Quote from: Teneyes on December 22, 2013, 04:18:57 pm --- --- Quote from: Fagear on December 22, 2013, 04:04:12 pm ---But then press CH1 button and use horizontal scale knob. The FFT will scale with CH1 waveform as well and will shift to the side. Playing around with both horizontal knobs (rotating and pushing, while CH1 is selected) will force FFT graph to shift and jump around and sometimes to dissapear. To reposition FFT graph you need to press MATH, set required zoom and push POSITION to center the graph. --- End quote --- @ Rory Yes the CH1 and Math buttons change the function of the <Scale> Knob. But as Fagear states , ackward or bugging --- End quote --- Thanks Fagear and Teneyes. Exactly what I needed to know. I got tired of turning off Math to make the timebase changes then turning FFT back on. Sometimes need to see envelopes in the time domain at slower clockrates than the right rate for the FFT. |
| Navigation |
| Message Index |
| Next page |
| Previous page |