| Products > Test Equipment |
| Keysight's new 34465A (6.5 digit) and 34470A (7.5 digit) bench multimeters |
| << < (29/145) > >> |
| TiN:
LM399 in socket? :) Beware wild voltnuts. As a serious note, maybe that's how they swap reference to LTZ1000 for 34470A, if mainboard same? Just plug a LTZ-based ref board into socket. |
| 6thimage:
--- Quote from: TiN on March 11, 2015, 02:33:21 pm ---LM399 in socket? :) Beware wild voltnuts. As a serious note, maybe that's how they swap reference to LTZ1000 for 34470A, if mainboard same? Just plug a LTZ-based ref board into socket. --- End quote --- The 34461A's LM399 is socketed as well. I doubt you could do a direct swap for an LTZ1000 though (even if it is on its own board), as I thought it required that the voltage output was separate to its input. |
| 6thimage:
--- Quote from: LaurentR on March 11, 2015, 05:59:16 am ---I am confused about the trend plotting in Data Log or Digitize modes. Is it available while logging or only when logging/digitizing is done? Does the graph get reset (and not redrawn) if you change the X axis? Can you also rebin the histogram without clearing it? --- End quote --- I have been given some answers on how the trend chart and histogram work. When data logging to memory, the trend chart and the histogram both use the stored data - so you can re-bin the histogram without data loss. When logging to a file, the measurements are also stored into memory, allowing the use of cursors, zoom and re-binning. However, when the number of readings surpasses the memory limit, both the trend chart and histogram revert to continuous mode. In continuous mode, the trend chart data is compressed into 'buckets' which have a constant time width. Each of these buckets keeps a high and a low value. For displaying of the 'recent' trend chart, the last 400 of these buckets are shown and scroll to the left hand side of the screen. When the 'all' trend chart is displayed, all the buckets are compressed to fit onto the screen - with the highs and lows being kept for each pixel column. For the histogram, in continuous mode, the samples are binned continuously, with the only limitation being that each bin count is stored as an integer. The auto-binning can compress bins to cover a broader range, but cannot arbitrarily re-bin. When digitising, the histogram is not actively updated, with its processing being postponed until the digitising is complete - this is done so that the measurement rate can be guaranteed. Additionally, the data for the histogram is only processed if the display is set to it (in continuous & data logging, the histogram is updated with every reading). --- Quote from: KedasProbe on March 11, 2015, 09:41:20 am ---The person that came up with the name "Digitize Mode" at Keysight should be fired. --- End quote --- Why do you think that? |
| EEVblog:
--- Quote from: TiN on March 11, 2015, 02:33:21 pm ---LM399 in socket? :) Beware wild voltnuts. As a serious note, maybe that's how they swap reference to LTZ1000 for 34470A, if mainboard same? Just plug a LTZ-based ref board into socket. --- End quote --- You'll have to wait for my teardown, rendering now... 35 minutes of waffle about the reference and A/B comparison with the 34461A board. |
| KedasProbe:
--- Quote from: 6thimage on March 11, 2015, 09:04:00 pm --- --- Quote from: KedasProbe on March 11, 2015, 09:41:20 am ---The person that came up with the name "Digitize Mode" at Keysight should be fired. --- End quote --- Why do you think that? --- End quote --- Because it doesn't say anything about what is different in that mode, it's digitizing in all modes, that's what a DMM is supposed to do. "Measuring Mode" would say equally as 'much'. "High Speed Mode" for example would already mean something. |
| Navigation |
| Message Index |
| Next page |
| Previous page |