Forum Replies Created
- Posts
lsullivan,
When average detector is selected, the averaging algorithm is used, when min/max detector is selected the IIR filter is used.
If you are able to provide more information about your measurement, we can try to help you determine the best settings for the device.
Andrew
Chuck,
Once you enter both the map and the lat/lon coords, you can use the import/export session to load/save both the map and coords simultaneously for future use. For my testing, I exported the session with map and coords before making any measurements, so I could quickly load a clean map on each startup.
In the case of mapping, the preset doesn’t store the map/coords, only the mapping session. So when you want to start up where you left off, load your exported session, and load a preset with the mapping settings you like.
Hope this helps!
AndrewChuck,
The import guide is located in the Spike installation directory at C:/Program Files/Signal Hound/Spike/manuals.
Let us know if you still have problems after looking through that.
Thanks!
Thanks for the feedback Tuong.
Thanks for the feedback Henry.
As of right now only channel power measurements are available in the RF mapping mode. We will look into P25 in the future as this is a highly requested measurement. I don’t have a timeframe on this at this time.
Andrew
November 28, 2021 at 7:02 am in reply to: Automatic modulation scheme selection in Digital Modulation Analysis Tuong,
This is not currently planned functionality. If you need this type of functionality, consider looking into our third party software vendors.
https://signalhound.com/support/third-party-software/
Some of these vendors support this type of measurement.
Andrew
Tuong,
There is no SNR measurement for the mapping functionality. Is there a certain type of signal you are trying to measure? Based on your other post, are you trying to perform a digital demodulation measurement to overlap on the map?
Regards,
Hi Stanley,
The Quasi-peak detector is currently only available in Spike. We don’t have any way to automate this measurement via an API at this time. If we provide anything in the future it would probably be through SCPI commands to Spike. We don’t have any plans to pursue this at the moment though.
I appreciate your feedback, if you would like to reach out to me via email at aj at signalhound dot com, I can contact you if we ever pursue this in the future.
Andrew
I’m not sure if we’ve used an external GPS with a ublox. Our SM200 uses this chipset, but we don’t interface it over serial as Spike does.
It is probably better in the short term to consider using a different GPS if possible. If you would like to email me at aj at signalhound dot com, I can keep your email and let you know if we are able to acquire the GPS you are using and get it working in Spike. Also, it might be interesting for us to add some debugging utilities to the GPS interface in a future release of Spike, and I can reach out if we ever add something like that.
I apologize for the inconvenience. Thanks for your patience and providing the information.
Andrew
Looking at the logic now. It does not appear to stop reading after a comm err. It continues to read the input and if it found the RMC sentence in a subsequent message it would update the dialog with the nav info found.
The Spike software does expect the RMC string to be sent in each update, and it does expect roughly a 1 second update rate. My COM reads have a 50ms readintervalTimeout, and a 2second total timeout. I read 2k bytes at a time in a loop. If you are using a low baud, like 9600, you might simply be trying to transmit too much data in this interval. Consider increasing your baud rate or decreasing your message size if you can.
If RMC messages were still coming in periodically, I would expect you to see it flip between valid and Comm Error.
Looking at the code here, it also looks like it will still save the last lat/lon it found. So even if it was flipping between valid data and comm err, the mapping mode should still be able to query the last valid value seen.
Andrew
The ‘V’ in the second field indicates “void” or that the data is invalid. You can see this too, as the fields after the ‘V’ should contain the lat/lon but they are empty.
Are you getting the “Comm Err” message? If yes, then it’s not even getting that far to see the ‘V’. The Comm Err indicates the software is not even seeing the “RMC” substring, which does indicate potentially the baud rates not matching or some other issue with the data. It looks like you can control the baud rate in the document you linked, you might try configuring different rates on the unit itself. Presumably you can also see the device listed under the COM ports in the device manager?
If you were able resolve the comm error, then the device would still report “Unlocked” with your current message shown and the lat/lon wouldn’t be available to the mapping measurements.
We used this USB GPS antenna (linked below) with success in our testing. It did involve some setup we can try to help you with if you go this route.
Andrew
Brian,
I’m assuming you are on Windows? The software is looking for the RMC NMEA sentence. Have you used something like tera term to verify the serial output of the GPS? What is the model number for your unit?
Andrew
The type 2 BB60C was a minor component change with no affect to the operation of the unit. You can determine if you have a BB60C-2 by connecting your unit to the PC and looking in the device manager under USB devices. It will show up as a “BB60C” for type 1 devices, and “BB60C-2” for type 2 devices.
If you are still unsure, you can contact our service department at service@signalhound.com with your serial number and we can look up your unit.
Andrew
DAtkins,
Thanks for the suggestion. I got it into the customer request log. We’ll consider how we can add this to our software.
Thanks!
Hi Volker,
Yes, we have been working on LTE measurements and hope to release them in Spike soon. Due to customer feedback we are also exploring 5G measurement support to be released simultaneously. Unfortunately we don’t have a set release date, but it does look like 2022 at this point.
If you have specific LTE/5G measurement requirements, please reach out to me at aj at signalhound dot com to let me know about them. I look forward to any feedback on this.
Andrew
Michael,
I will add your name to our contact list for the SM435B any any high freq gen we release. We will contact users closer to when the SM435B goes on sale.
Mneuman,
Our RF engineer Justin might be able to reply with a suggestion.
Andrew
Hi Michael,
We have discussed it, but there is nothing in the works yet.
Andrew
Please email aj at signalhound dot com and I can help you further. Please send me the following information.
1) What is the S/N of the unit?
2) Did you buy the unit new from us? How recent?
3) If the front end is damaged (such as a switch/atten) you may not see a signal. Is it possible the unit was damaged due to static or high input (> 20dB). Are you grounded when attaching your antennas?I look forward to your response.
Andrew
Are you able to upload a smaller picture? It rejected your picture based on file size.