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Pocket-Sized 6 GHz 1 TS/s ET Scope

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Randy222:
I think it's a neat product, but outside my budget. Niche market for sure, but even that, probably still limited audience.
I would be more interested if it could at cover wifi7 bands.
Also, why does the silkscreen on device say +-950mV(max), but the manual print says +-1.2V(max)?
Also, considering it reaches into GHz, I would like to see some specs listed in dBm units, but that's just me.

SJL-Instruments:
@perdrix Yes, this is a sequential sampling oscilloscope. It builds up a waveform over many triggers, and can only view data after the trigger (not before).

@Randy222 The ±1.2V in the manual is the absolute maximum rating. The usable signal range is ±950 mV (actually ±1V, datasheet is conservative). [Anecdotally, we've sent 5V into a test unit without damage.]
For an arbitrary (non-sinusoidal) waveform, there is no one-to-one correspondence between Vmax and dBm.
Applying a constant 950 mV corresponds to 12.6 dBm power, but a 2.4 Vpp sine wave (at the absolute max rating) is only 11.6 dBm.

Randy222:

--- Quote from: SJL-Instruments on January 08, 2024, 02:12:29 pm ---@perdrix Yes, this is a sequential sampling oscilloscope. It builds up a waveform over many triggers, and can only view data after the trigger (not before).

@Randy222 The ±1.2V in the manual is the absolute maximum rating. The usable signal range is ±950 mV (actually ±1V, datasheet is conservative). [Anecdotally, we've sent 5V into a test unit without damage.]
For an arbitrary (non-sinusoidal) waveform, there is no one-to-one correspondence between Vmax and dBm.
Applying a constant 950 mV corresponds to 12.6 dBm power, but a 2.4 Vpp sine wave (at the absolute max rating) is only 11.6 dBm.

--- End quote ---
?
DC and RMS(sine) should be the same. 950mV(dc) is not same as RMS of 2.4Vpp sine.
The device can sink 12.6dBm in DC, but not 12.6dBm sine wave?

SJL-Instruments:
The ratings for absolute max and usable range are properly in volts, and you should look at Vmax to gauge your application.
For an extreme example, you could send in a 10 V, 1 ns pulse every microsecond, which would eventually blow up the scope, despite only reaching 3 dBm average power.

You can use 10 dBm as a rough guideline for a CW waveform, but for anything odd, check Vmax. If you don't know Vmax, you can try a series of decreasing SMA attenuators until the signal is in range.

Marco:

--- Quote from: joeqsmith on January 07, 2024, 09:29:32 pm ---Normally, like with an ignition signal, there is no good way to create a pretrigger

--- End quote ---
A comparator and 5 meters of coax.

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