Jump to content

TXAdvance - New app


Recommended Posts

6 hours ago, Compasseur said:

Thanks Fred, and nice view!
Here are also a nice view and pretty clean spectrum from not very far...

txadvance_kazneh.png

Hi Daniel, I am not sure I completely follow you. You need to first set up your scan limits, let's say from 470 to 694. So any frequency below 470 or higher than 608 will not be scanned but can still be selected for a TX (you will just not know the frequency content in dBFS) then set your TX frequencies limit : you can keep the default one or in the case of MCR54, set them up so that they represent 32MHz. That will make sure the app only presents you with 32MHz worth of bandwidth frequencies. You can then add exclusion lists from 608 to 614 for example (I believe this band is forbidden in the US) and any other you need. The frequencies in exclusion lists will also be kept out of the list of frequencies for every TX. That can also be useful if you have to share the RF spectrum with other people.

All good with this part since you explained about using multiple customs exclusion lists.

 

The other part I think I need to spend more time with the app and watch the videos again. Thank you for the reply.

 

 

 

 

 

 

 

 

 

 

 

Link to comment
Share on other sites

  • 2 weeks later...

As a follow up: 

I stopped trying to reference the frequency co-ordination of TXA with those of the various RX in use  (🤯) and just went with TXA (as advised by Compasseur :) and so far been very happy. Ran the scanner during a location recce, built a TX list, applied exclusions, pressed AUTO and dialled the numbers into the HW. 7 channels all good to go on the day. Next job, has no recce but I've built a new TX list specific to the shoot, dialled in the provision numbers and saved (to 'home') so i can compare numbers to results specific to the next location but the same TX list and change as required.

I think my anxiety around the difference between TXA and the RX co-ordination is not knowing how TXA handles the different RF footprints of the specific brands and ranges? I guess if TXA uses the largest 'footprint' for the calculation it doesn't matter?

 

Link to comment
Share on other sites

Hello all, back from my shoot in Palestine/Israel. 6 wireless lav LT tx, 2 HMa, 3 different IFB tx (sennheiser G4, lectro LT et sony something). No SL2 but the PSC multiplexer 8x inputs and lectrosonics lpda antennas. The app really gave me confidence and saved quite some time. I followed its auto function for each set without any trouble. Only some tx could not give me easy access to the frequency suggested by the app (no time for fine tuning) so I choose the closest available in all green and changed it manually in the app. Not a single rf interference during the 10days. Quite a breeze overall!

 

Important advice: the usb connections need to be perfect. I had a bit of gap in the female usb A connector and the sdr usb male, and that gave me lots of scans stopping not completed. I had to hold it in a way that the connection is maintained without moving for the time of the scan. Will look for better adaptor now 😉

 

 

Link to comment
Share on other sites

6 hours ago, daniel said:

As a follow up: 

I stopped trying to reference the frequency co-ordination of TXA with those of the various RX in use  (🤯) and just went with TXA (as advised by Compasseur :) and so far been very happy. Ran the scanner during a location recce, built a TX list, applied exclusions, pressed AUTO and dialled the numbers into the HW. 7 channels all good to go on the day. Next job, has no recce but I've built a new TX list specific to the shoot, dialled in the provision numbers and saved (to 'home') so i can compare numbers to results specific to the next location but the same TX list and change as required.

I think my anxiety around the difference between TXA and the RX co-ordination is not knowing how TXA handles the different RF footprints of the specific brands and ranges? I guess if TXA uses the largest 'footprint' for the calculation it doesn't matter?

 

Hi Daniel, 
I am glad that the auto mode worked well !
About it, the app does not take into account TX specific deviation but has a general settings TX bandwidth (and also IM bandwidth). This setting will affect the bandwidth of a frequency on the charts (so the red line representing TX), the number of "orange" dots in the frequency list (so the frequencies considered too close to an already taken (red) frequency and the auto mode.
The auto mode will take every possible frequency for a TX (so the "frequency step" settings in the TX setting will affect the auto mode, especially the time it takes), and give it a rate. The higher the rate, the worst the frequency is considered ; for example frequencies which are already occupied by another TX or are at a 2T3O intermod will get a very very high rate. 

For every frequency, the rate will include the surrounding frequencies (the number of surrounding frequencies is determined by the TX bandwidth setting), so the closer you are to an intermod the higher the rate will be, but a 2T7O will not increase your rate as much as a 2T3O...

And of course, the noise value of every frequency (and its surrounding frequencies) is also taken into account.

Also, the surrounding frequencies are always with a 5kHz resolution like the scans are  (and thus do not depend on the "frequency step").

I hope that it clarifies a bit how the auto mode works.

6 hours ago, Fred Salles said:

Hello all, back from my shoot in Palestine/Israel. 6 wireless lav LT tx, 2 HMa, 3 different IFB tx (sennheiser G4, lectro LT et sony something). No SL2 but the PSC multiplexer 8x inputs and lectrosonics lpda antennas. The app really gave me confidence and saved quite some time. I followed its auto function for each set without any trouble. Only some tx could not give me easy access to the frequency suggested by the app (no time for fine tuning) so I choose the closest available in all green and changed it manually in the app. Not a single rf interference during the 10days. Quite a breeze overall!

 

Important advice: the usb connections need to be perfect. I had a bit of gap in the female usb A connector and the sdr usb male, and that gave me lots of scans stopping not completed. I had to hold it in a way that the connection is maintained without moving for the time of the scan. Will look for better adaptor now 😉

 

 

Hi Fred,

 

Thanks a lot for the feedback. Indeed you are right, all OTG were not created equal and some can be sensitive. I would recommand to put the phone/tablet and SDR dongle on a table or something so that they do not move while scanning.

Link to comment
Share on other sites

  • 2 weeks later...

Hi everyone,

 

I would like to introduce a new feature in the TXAdvance app : TXAdvance Scan Exchange (TASE). It is a collaborative worldwide map of RF spectrum scans.
Scans are uploaded from TXAdvance and can be downloaded and imported by anyone.
The scans are precisely geotagged and time-stamped by the phone/tablet and have a 5kHz resolution in any band from 50 to 1300MHz. 

 

More infos there : https://www.compasseur.com/txadvance-scan-exchange-tase/
And the app is there : https://play.google.com/store/apps/details?id=com.compasseur.txadvance

 

Thank you.

txadvance_v4_tasehome_screenshot.jpg

txadvance_v4_tase_screenshot.jpg

Link to comment
Share on other sites

  • 2 weeks later...
On 5/28/2022 at 10:11 PM, Fred Salles said:

Hello all, back from my shoot in Palestine/Israel. 6 wireless lav LT tx, 2 HMa, 3 different IFB tx (sennheiser G4, lectro LT et sony something). No SL2 but the PSC multiplexer 8x inputs and lectrosonics lpda antennas. The app really gave me confidence and saved quite some time. I followed its auto function for each set without any trouble. Only some tx could not give me easy access to the frequency suggested by the app (no time for fine tuning) so I choose the closest available in all green and changed it manually in the app. Not a single rf interference during the 10days. Quite a breeze overall!

Hi Fred, am curious, what frequencies are legal over in Israel? (there was discussion on  jwsound saying all blocks from 21 to 28 are ok to use, or at least not enforced, but that was a decade ago)

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...