ProSoundWeb Community

Please login or register.

Login with username, password and session length
Advanced search  

Pages: 1 [2] 3   Go Down

Author Topic: RF Explorer, I assume it is a scanner. I think I am looking for a wide band rec.  (Read 921 times)

John Sulek

  • Sr. Member
  • ****
  • Offline Offline
  • Posts: 440
  • Toronto Canada

We usually mill about after our terrifying talk.  Please, I beg you to introduce yourself and let's chat!

Damn...I wish I wasn't working far from NYC this week.
Logged

Scott Helmke

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 1455

The catch with most handheld & inexpensive RF SA devices is that they can't display fine enough resolution across wide spans for the display to be useful.  RF Explorer, for instance, is limited to 112 data points across any span.  However, with experience you can use it well for your purpose.  You just need to tweak it as you zero in on a narrow span that covers your signal of interest until it shows sufficiently useful info (a well-defined peak of power at the frequency of interest).

To be more specific on the "catch", if you're looking at a wide span with the RF Explorer then you just won't see narrow little wireless mic/IEM transmissions at all. You need to zoom in to see those, which means spending a lot of time tweaking frequencies.
Logged

Kevin Maxwell

  • Hero Member
  • *****
  • Online Online
  • Posts: 1271

Are there any devices that are an RF receiver that interface with an android tablet that are any good. If nothing else I am wondering if the bigger screen on a tablet would help. If it would work with an Amazon fire tablet (I guess it is sort of an android device) that would be even better. Maybe I just need to give my wife the fire tablet to play with and I need to buy a Samsung tablet.
Logged

Jason Glass

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 704
    • CleanWirelessAudio.com

Are there any devices that are an RF receiver that interface with an android tablet that are any good. If nothing else I am wondering if the bigger screen on a tablet would help. If it would work with an Amazon fire tablet (I guess it is sort of an android device) that would be even better. Maybe I just need to give my wife the fire tablet to play with and I need to buy a Samsung tablet.

Take a look at RTL-SDR USB dongles.  Very powerful for their dirt cheap price and doable on Android.  https://sdrtouch.com/

Jason Glass

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 704
    • CleanWirelessAudio.com

To be more specific on the "catch", if you're looking at a wide span with the RF Explorer then you just won't see narrow little wireless mic/IEM transmissions at all. You need to zoom in to see those, which means spending a lot of time tweaking frequencies.

Indeed.  See attached files.  FWIW, it occurred to me after I inserted the captions in these graphics that although RF Explorer claims 578 kHz RBW @ 230 MHz span in its readout, those 112 data points are over 2 MHz apart.  Meaning that the RBW is actually around 6 MHz.  It takes 3 points to define a peak.

Pete Erskine

  • Moderator
  • Hero Member
  • *****
  • Offline Offline
  • Posts: 1355
    • Best Audio

Indeed.  See attached files.  FWIW, it occurred to me after I inserted the captions in these graphics that although RF Explorer claims 578 kHz RBW @ 230 MHz span in its readout, those 112 data points are over 2 MHz apart.  Meaning that the RBW is actually around 6 MHz.  It takes 3 points to define a peak.

Its the detail that I like...not so much that I see individual carriers but to clearly see the DTV,  When I scan, even with a TTI or FieldFox, I limit span to 60 mHz and combine the files later.  TTI is convenient because it is always in my Backpack and it has enough gain to really see the DTV.  Field fox, at 4X the price, is automated with the same results and even greater detail.  The Fieldfox can demodulate the signal to listen to a carrier but I still prefer the plain old scanner which has GPS as well as iOS and Android apps.

https://www.icomamerica.com/en/products/amateur/receivers/r30/default.aspx
« Last Edit: October 14, 2019, 11:59:27 am by Pete Erskine »
Logged
Pete Erskine
917-750-1134
www.bestaudio.com
peter@bestaudio.com

Andrew Broughton

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 1633
    • Check Check One Two
Logged
-Andy

"Well, my days of not taking you seriously are certainly coming to a middle..."

http://www.checkcheckonetwo.com
Saving lives through Digital Audio, Programming and Electronics.

brian maddox

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 2373
  • HeyYahWon! ttsss! ttsss!

We usually mill about after our terrifying talk.  Please, I beg you to introduce yourself and let's chat!

Depends on how terrifying your talk is and just how frightened i am...  :)

See ya later this week!
Logged
"It feels wrong to be in the audience.  And it's too peopley!" - Steve Smith

brian maddox
bdmaudio@gmail.com

'...do not trifle with the affairs of dragons...

       ....for you are crunchy, and taste good with ketchup...'

Jordan Wolf

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 1364
  • Location: Collingswood, NJ

See attached files...
Ugh...now I REALLY want to replace vs fix my RF Explorer. Thatís looks like GEQ vs PEQ! My eyes have been opened, lol.

How does the SignalHound USB-SA44B compare with your model?
Logged
Jordan Wolf
<><

"We want our sound to go into the soul of the audience, and see if it can awaken some little thing in their minds... Cause there are so many sleeping people." - Jimi Hendrix

Jason Glass

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 704
    • CleanWirelessAudio.com

Ugh...now I REALLY want to replace vs fix my RF Explorer. Thatís looks like GEQ vs PEQ! My eyes have been opened, lol.

How does the SignalHound USB-SA44B compare with your model?

It's excellent, but it sweeps slower (a few seconds to do 30 kHz RBW over a 230 MHz span vs. milliseconds). Its input is easier to overload with out of band signals and it's more prone to display LO images due simpler front end filtering.  However, it's a great instrument for our kind of work and a bargain for its cost.

ProSoundWeb Community

Re: RF Explorer, I assume it is a scanner. I think I am looking for a wide band rec.
¬ę Reply #19 on: October 15, 2019, 08:42:42 am ¬Ľ


Pages: 1 [2] 3   Go Up
 



Page created in 0.138 seconds with 22 queries.