Software/hardware for signal recording?

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Discussion Overview

The discussion revolves around the recording of a paging signal from a cordless phone, specifically focusing on the hardware and software options available for capturing and playing back such signals. Participants explore the technical requirements and potential solutions for recording both the paging signal and DTMF tones.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant seeks advice on recording a paging signal from a cordless phone using a VSA from Agilent, questioning its capability to record a full second with the specified bandwidths.
  • Another participant suggests that the recording might involve capturing the sound made by the phone, but clarifies that the original poster is interested in the FM format of the paging signal itself.
  • There is a suggestion that a radio receiver and oscilloscope could be necessary to record the radio signal, with an alternative proposal to duplicate the hardware used by the cordless phone base station for easier signal generation.
  • A participant mentions using a spectrum analyzer as a basic receiver to demodulate the signal, but notes limitations with their current oscilloscope for recording purposes.
  • The original poster indicates that while duplicating the hardware could work, the specific application requires recording and playback capabilities, though details cannot be shared.
  • In a later reply, the original poster shares that they have decided to use Adobe Audition for their recording needs, reporting satisfactory results.

Areas of Agreement / Disagreement

Participants express differing views on the best approach to recording the paging signal, with some advocating for hardware duplication while others suggest recording methods. The discussion remains unresolved regarding the optimal solution, as various methods are proposed without consensus.

Contextual Notes

Participants mention various technical tools and methods, but there are limitations in terms of the original poster's oscilloscope capabilities and the specifics of the application they are working on, which are not fully disclosed.

Firefox123
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Im trying to record about 1 second of a page signal from a cordless phone (later I might need to do this to the DTMF tones as well) so I can play it back and send it to a signal generator.

I am using a VSA from Agilent, but I am not sure if it can record a full second with the bandwidths I am using.

My span is about 50 kHz and I have a resolution bandwidth of 1kHz (I may change this to 10 or 30 kHz though)...

If anyone knows some good hardware/software for recording and playing back signals please let me know...

And some software that can record, decode, and create DTMF signals would be a nice bonus as well.

If anyone has any info Id really appreciate it.

Thanks.
 
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Are you talking about recording the sound the cordless phone makes when it's paged?

The web should be absolutely littered with DTMF tone generators. You can probably write one with ten lines of a language like Python.

- Warren
 
chroot said:
Are you talking about recording the sound the cordless phone makes when it's paged?

Im talking about recording the paging signal itself...in its FM format as transmitted.

chroot said:
The web should be absolutely littered with DTMF tone generators. You can probably write one with ten lines of a language like Python.

- Warren

Sure they are out there...but it never hurts to ask.
 
Well, I suppose you'd need a radio receiver and oscilloscope to "record" the radio signal itself.

Why don't you just duplicate the hardware the cordless phone base station uses to generate the page signal? That'd probably be much easier than trying to "record" and "play back" the RF signal.

- Warren
 
chroot said:
Well, I suppose you'd need a radio receiver and oscilloscope to "record" the radio signal itself.

Thats the basic idea...you can use a spectrum analyzer as a basic receiver (to demodulate the signal and strip the carrier off) and then record with an oscilloscope...but the scope I currently have can't really do a recording like I need it to...

chroot said:
Why don't you just duplicate the hardware the cordless phone base station uses to generate the page signal? That'd probably be much easier than trying to "record" and "play back" the RF signal.

That could be done, but the application I am using it for would be better served with recording and playback capability. Id explain, but unforutnately I really can't give any specifics.
 
Thanks for all the replies...

I decided to use Adobe Audition and it is working out pretty good.






Russ
 

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