I came across something useful for myself – at least a ‘hands free’ way of investigating circuit behaviour
My question is if something similar can be implemented (if not already) that can be used for SSA’s
– especially when matched impedances are required
– not to mention much higher frequencies than typical with MSO’s
It’s possible to fabricate a suitable cable with an appropriate termination at the SSA end
Can we do same at the probe end?
I guess it’s a matter of simply trying to see what the frequency response will be – using the SSA itself ??
We can create two cables terminated at the TG and SSA input using suitable N terminations
– then simply ‘tune’ the 'probe end' and if not perfectly flat response for the entire 3.2G span
– normalize it before use
This should work I guess for TG sweeps … but if just ‘probing’ with SSA input alone will we have any problems??
Has anyone attempted something similar?
Any feedback welcome
I do also have that same set with 4 scope probes and 8 digital probes
very handy
sad they only go up to 100MHz ;(
I was in doubt if I should post it here or in the post for the SVA but sinds the calibration is still a hot topic for the upgraded SSA I decided for this forum. If I was wrong then please move or delete this post.
I came along this post:
https://www.instructables.com/id/23GHz-SMA-Calibration-Kit/
I build it on a N-connector to see how good that was only to discover that the SVA showed a poor open. My ohmmeter confirmed 50 Ohms? After close up inspection I notisted that the pin was much tinner, probebly a 75 Ohm connector.
I still think the site is good and I will try again when I have the right connectors.
Making your own calibration set is possible, but you need to keep high precision here.
In the case of the N connector there are greater distances and it should be remembered that the cable connected to the resistor must have an impedance of 50ohm (impedance not resistance). In principle, the resistor should also be non-inductive.
However, by using very short connections and a small resistor, this condition can be omitted (Can be made with small SMA connectors)...
Therefore, such a set will be easier to make using SMA connectors and using the SMA to N adapter.
I was in doubt if I should post it here or in the post for the SVA but sinds the calibration is still a hot topic for the upgraded SSA I decided for this forum. If I was wrong then please move or delete this post.
I came along this post:
https://www.instructables.com/id/23GHz-SMA-Calibration-Kit/
I build it on a N-connector to see how good that was only to discover that the SVA showed a poor open. My ohmmeter confirmed 50 Ohms? After close up inspection I notisted that the pin was much tinner, probebly a 75 Ohm connector.
I still think the site is good and I will try again when I have the right connectors.
Making your own calibration set is possible, but you need to keep high precision here.
In the case of the N connector there are greater distances and it should be remembered that the cable connected to the resistor must have an impedance of 50ohm (impedance not resistance). In principle, the resistor should also be non-inductive.
However, by using very short connections and a small resistor, this condition can be omitted (Can be made with small SMA connectors)...
Therefore, such a set will be easier to make using SMA connectors and using the SMA to N adapter.
I do also have that same set with 4 scope probes and 8 digital probes
very handy
sad they only go up to 100MHz ;(
P20B - NICE
Any chance of getting the Sensepeek probe (100Mhz) and hooking it up to the SSA - to see how long it stays 'flat' for ??
- just curious if its labeled at 100Mhz but has some more milage
I do also have that same set with 4 scope probes and 8 digital probes
very handy
sad they only go up to 100MHz ;(
P20B - NICE
Any chance of getting the Sensepeek probe (100Mhz) and hooking it up to the SSA - to see how long it stays 'flat' for ??
- just curious if its labeled at 100Mhz but has some more milage
Yeah i'll sweep it if i remember sometime next week.. gear is busy atm
Official as from Siglent? Looks good, it is like the box they deliver limited edition in.
Official as from Siglent? Looks good, it is like the box they deliver limited edition in.
Pics of the official sma cal kit... spare no expenses! Look at that fine wood craftsmanship
Pics of the official sma cal kit... spare no expenses! Look at that fine wood craftsmanship
If you still have (or ever got) the NanoVNA's SMA calibration kit - would be nice to see a direct comparison to the 'official' Siglent kit
My bet is that the NanoVNA's kit is not that far off the 'official'
But I can always be wrong
Or maybe I just wanted the box....
Or maybe I just wanted the box....
Well I am exhibiting some signs of Jealousy for the 'box' already - you know the old saying ... good things come inside small boxes
... looking foward to tautech feedback soon ...
Pics of the official sma cal kit... spare no expenses! Look at that fine wood craftsmanship
If you still have (or ever got) the NanoVNA's SMA calibration kit - would be nice to see a direct comparison to the 'official' Siglent kit
My bet is that the NanoVNA's kit is not that far off the 'official'
But I can always be wrongKeep you eyes peeled on the SVA thread in a few weeks when my F603FE Cal kit arrives.
I have a 7 GHz Kirkby SMA calibration 'correction' loaded into a fair dinkum SVA1032X and F603FE will be checked against it and another trip to see hendorog (my local VNA guru) might arise if he has any full Nano Cal kits left.
How to crossflash a SSA3000X Plus into a SVA1032X:
1. Telnet into the equipment
2. rename
/usr/bin/siglent/ecomb_p
to
/usr/bin/siglent/ecomb
3. in file /usr/bin/siglent/startup_app.sh change the line
/usr/bin/siglent/ecomb_p &
to
/usr/bin/siglent/ecomb &
4. in file /usr/bin/siglent/config/NSP_config_upgrade_info.xml change the line
<upgrade_static_id>11405</upgrade_static_id>
to
<upgrade_static_id>11403</upgrade_static_id>
5. Reboot
6. Now you can update your SSA with the Siglent's SVA stock FW.
(should work with SVA1032X_2.2.1.2.5 or SVA1032X_2.2.1.2.7, at least)
7. After having flashed your first SVA stock FW, the SSA has become a "true" SVA.
To lower the risk you can do an additional step which is to activate the telned daemon before the line reference in step 3.
(for example, place there: /sbin/telnetd -l /bin/sh -p 10101 & )
As always: do it at your own risk.
How is it possible to convert a Spectrum Analyzer into a Network Vector Analyzer by just reflashing the firmware?
Is the hardware identical?
Is an NVA better than an SA in all categories?
Is there a good detailed description available about the differences in capabilities of both devices?
Is the hardware identical?