Products > Test Equipment
Pocket-Sized 6 GHz 1 TS/s ET Scope
joeqsmith:
--- Quote from: SJL-Instruments on February 09, 2024, 12:16:19 am ---
--- Quote from: joeqsmith on February 09, 2024, 12:09:23 am --- :-DD Are you getting any feedback from Signal Path?
--- End quote ---
We can't comment on that, sorry. (Not sure whether Shahriar wants his schedule publicized.)
--- End quote ---
I wasn't referring to his schedule. I want to know if he is finding other problems or offering suggestions outside of what had been mentioned here....
SJL-Instruments:
--- Quote from: joeqsmith on February 09, 2024, 12:58:22 am ---I wasn't referring to his schedule. I want to know if he is finding other problems or offering suggestions outside of what had been mentioned here....
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Not yet - although if he does have suggestions or finds any problems, we will be similarly responsive in addressing them (and have mentioned this to him).
joeqsmith:
Too bad. It may prove helpful to hear from others who are trying it out.
Using the GigaWave to look at the output from my frequency extender. LiteVNA set to 10GHz. 250ps sweep time with 500fs resolution. I have to say, the more I play around with it, the more surprised I am with just how well it works.
joeqsmith:
LiteVNA set to 11GHz, 100ps sample time with the start of collection at 7.7ns, ran overnight. What is interesting about this plot is while the signal is all negative, the trigger is set to a positive value.
Is there a sign problem or is it possible that voltage values calculated are not the same as what the trigger circuit sees?
--- Quote ---4.5.2 L (Set Trigger Level)
Command Format: Lx
Expected Response: OK Lx.
Available in all firmware revisions.
Sets the trigger level on a scale from –1.5 V (L0) to +1.5 V (L65535).
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I limit it to +1 (54612) to -1 (11909). Trigger level with this test was set to +3mV or 32833.
SJL-Instruments:
--- Quote from: joeqsmith on February 09, 2024, 01:38:47 pm ---LiteVNA set to 11GHz, 100ps sample time with the start of collection at 7.7ns, ran overnight. What is interesting about this plot is while the signal is all negative, the trigger is set to a positive value.
Is there a sign problem or is it possible that voltage values calculated are not the same as what the trigger circuit sees?
--- End quote ---
This is essentially the reverse of the DC transient on CH1 prior to the spec'd start time. When the trigger circuit is reset, there can be a residual offset of a few mV when switching from the CDF query voltage to the trigger voltage. (Anecdotally, this offset is always negative, but we again haven't characterized this thoroughly).
This is mainly important if you are pushing the frequency beyond spec, as the trigger sensitivity tends to drop with frequency.
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