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| Keysight 3000T scope 1 GHz(or more) hardware upgrade mod |
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| sibeen:
You are all mad, and my DSOX3024T is sitting on my bench and madly agreeing with me. As I work in the power area I sometimes go as high as the 60th harmonic, so 3 kHz. I think I'll leave mine well alone, but respect to those who did this mod. |
| Samogon:
in contrast to 3000T series we have already populated inverter U1507 74ACT04 on 3000T corresponds to U1613 on 4000x This is how CPU manages front attenuator relays. It uses serial data going to Serial to parallel converter U502 74AHCT594 and then finally transistors drive relays. |
| Samogon:
--- Quote from: Pinkus on August 29, 2018, 12:22:45 pm ---The "back" picture shows a lot of flux as if somebody already reworked this. Did they (Agilent) really deliver such a board? The front end looks (almost) identical to the 3000 series, thus it should be not a big deal. Though the mod for 1.5 Ghz has afaik not been made yet. --- End quote --- Well board has flux all over it especially where through hole components are, looks to me nobody cared to clean it. But board looks intact |
| Samogon:
--- Quote from: sibeen on August 29, 2018, 12:31:08 pm ---You are all mad, and my DSOX3024T is sitting on my bench and madly agreeing with me. As I work in the power area I sometimes go as high as the 60th harmonic, so 3 kHz. I think I'll leave mine well alone, but respect to those who did this mod. --- End quote --- Well it depends what tasks you are aiming. For you probably 50Mhz scope would be enough. For me just as example i needed 500MHz scope minimum to measure Pulse Edge Time of Agilent 33250A when calibrating it. |
| TheSteve:
Had another look at the input SWR to my modded scope tonight with a newer VNA. I am quite pleased with what I see. Generally scopes seem to be specified as having an input SWR of 1.5:1 or less over the rated bandwidth with the 50 ohm input enabled. The scope beats this spec with and without the Teledyne attenuator switched in to 1.5 GHz. With that in mind I'll have another look at the low pass filter components and see if we can't finally mod the 3000t series to a full 1.5 GHz. 100 mV range(Teledyne switched in): 200 mV range: |
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