| Products > Test Equipment |
| Best Oscilloscope under $300? |
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| tggzzz:
--- Quote from: Aldo22 on February 22, 2024, 02:32:11 pm ---@tggzzz: I understand what you mean, but we're in the "under $300" thread here and we're not talking about the same thing. I'm talking about a first somewhat "complete" scope that opens a door to a new world. --- End quote --- I'll sell you a very "complete" working recapped Tek 2465 4-channel 300MHz scope for £300. I have two, and ought to reclaim the space. After making sure it works properly (possibly including recapping), I'll sell my spare 350MHz Tek 485 with real 50ohm input (not 50ohm//15pF) for the same. You're not having my working dual-channel 1.7GHz scope that I bought for £20 :) But that definitely isn't a general purpose scope for a beginner :) --- Quote ---In the old days, you might have bought a book on oscilloscopes. Today you buy a Hantek (or similar) for the same money and try out what you can do with it. There is even something to read through the help system (Attachment). ;) The price is so low, it's about the same as the surcharge of a Rigol DHO914S on a Rigol DHO914. If you get tired of it, you can continue to use it as a signal generator. :D I can't see anything wrong with it. --- End quote --- You do realise that 100MHz was just adequate for digital logic in the early 80s, don't you? Modern jellybean logic is much faster than that, and important features on the waveforms will simply be invisible. You won't get tired of either the 485 or 2465; they are both delightfully easy to use. Unlike some new scopes, those Teks "do what they say on the tin". The full manual for the Tek scopes are all free. The 1ns risetime "signal generator" in the Tek 485 is useful for verifying performance, much more so than the traditional one in the 2465s. |
| Aldo22:
--- Quote from: tggzzz on February 22, 2024, 03:39:53 pm ---I'll sell you a very "complete" working recapped Tek 2465 4-channel 300MHz scope for £300. I have two, and ought to reclaim the space. After making sure it works properly (possibly including recapping), I'll sell my spare 350MHz Tek 485 with real 50ohm input (not 50ohm//15pF) for the same. --- End quote --- Thanks, but with shipping and taxes it will cost me an estimated CHF 500.- I don't want to spend that at the moment. I'm just playing and learning. :D |
| nctnico:
--- Quote from: tggzzz on February 22, 2024, 03:39:53 pm ---You do realise that 100MHz was just adequate for digital logic in the early 80s, don't you? Modern jellybean logic is much faster than that, and important features on the waveforms will simply be invisible. --- End quote --- You keep repeating this but in the real world you rarely run into situations where you need more than 100MHz. And certainly relatively simple circuits beginners are working on don't require use of >100MHz scopes. Features like single shot capture, deep memory and protocol decoding are far more useful when doing things with microcontrollers. And if the need arises, a typical university will have a high speed oscilloscope available. Or, when on a tight budget, one can buy one of the many older >500MHz DSOs from Agilent or Tektronix. |
| tggzzz:
--- Quote from: Aldo22 on February 22, 2024, 03:55:08 pm ---I'm just playing and learning. :D --- End quote --- Including, I hope, the first two lines of my .sig ;) |
| tggzzz:
--- Quote from: nctnico on February 22, 2024, 04:03:08 pm --- --- Quote from: tggzzz on February 22, 2024, 03:39:53 pm ---You do realise that 100MHz was just adequate for digital logic in the early 80s, don't you? Modern jellybean logic is much faster than that, and important features on the waveforms will simply be invisible. --- End quote --- You keep repeating this but in the real world you rarely run into situations where you need more than 100MHz. --- End quote --- You keep failing to understand the only reason for needing a scope for digital logic is to ensure signal integrity. Once that is ensured, flip to digital domain tools. Analogue tools such as scopes make very suboptimal digital domain tools. --- Quote ---And certainly relatively simple circuits beginners are working on don't require use of >100MHz scopes. Features like single shot capture, deep memory and protocol decoding are far more useful when doing things with microcontrollers. And if the need arises, a typical university will have a high speed oscilloscope available. --- End quote --- If they are working on modern digital logic, 100MHz is insufficient. <yawn>No, the signal period doesn't matter; only the transition time is important</yawn> For the reasons I noted earlier, the deep memory and protocol decodes on low-end scopes can be very unsatisfactory to the point they become unhelpful. Much better to get the appropriate dedicated digital-domain tool. |
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