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Old September 16th, 2011, 06:08 AM   #1
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Spectrum analyzer for working with wireless mics

I just stumbled across a reasonably priced, handheld spectrum analyzer that can help with the task of dodging noisy frequencies.

It's originally designed for radio-control enthusiasts but one of the units covers the same band that is used by wireless mics. Price is $129.

RF Explorer model WSUB1G [TES82252P] - $129.00 : Seeed Studio Bazaar, Boost ideas, extend the reach

Frequency band: 240 - 960 MHz
Frequency span: 112KHz - 100MHz
Graphics LCD 128x64 pixels, great visibility outdoors
PC Windows client supports Windows XP/Vista/Win7 both 32 and 64bits
Backlight for great indoor visibility
Standard SMA 50 ohms connector, wideband Nagoya NA-773 telescopic antenna included
Amplitude resolution: 0.5dBm
Dynamic range: -115dBm to 0dBm
Absolute Max input power: +5dBm
Average noise level (typical): -110dBm
Frequency stability and accuracy (typical): +-10ppm
Amplitude stability and accuracy (typical): +-3dBm
Frequency resolution: 1Khz
Resolution bandwidth (RBW): automatic 2.6Khz to 600Khz
Weight: 185g
Size: 113x70x25 mm
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Old September 18th, 2011, 11:32 AM   #2
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Re: Spectrum analyzer for working with wireless mics

Have you tried this thing? It looks like the display would be very small and hard to read, and I would suspect the software slow. A good cheap spectrum analyzer is one of those things that I suspect will appear as an ipad application soon.
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Old September 18th, 2011, 04:22 PM   #3
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Re: Spectrum analyzer for working with wireless mics

Quote:
Originally Posted by Tom Morrow View Post
A good cheap spectrum analyzer is one of those things that I suspect will appear as an ipad application soon.
For RF? What would you use for the antenna, RF preamp, tunable RF filters, etc.? Certainly nothing that's part of an iPad. At best the iPad might serve as a display for an external RF spectrum analyzer box.
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Old September 19th, 2011, 02:33 PM   #4
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Re: Spectrum analyzer for working with wireless mics

Quote:
Originally Posted by Tom Morrow View Post
Have you tried this thing? It looks like the display would be very small and hard to read, and I would suspect the software slow. A good cheap spectrum analyzer is one of those things that I suspect will appear as an ipad application soon.
I haven't. Just saw it recently since I also have an interest in RC topics. The RC people seem to think this is a great piece of equipment to determine RF "noise" levels to prevent their expensive aircraft from being lost or "shot down".

I've looked at the possibility of getting a spectrum analyzer to make setting up wireless mics a little easier, although my ATW-1800 can scan for clean channels.

As for size of display, some of the Lectrosonic systems have built-in spectrum analyzers and the display is tiny. Seems to work for them.

Hard to beat the price of this analyzer. Other spectrum analyzers are several times this price. That's what caught my attention.
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Old September 19th, 2011, 03:02 PM   #5
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Re: Spectrum analyzer for working with wireless mics

BTW, if anyone does get this, it would be a good idea to check with the guy who builds them to make sure it covers the frequency range you're working in. It's not clear if the range of frequencies it covers is a continuous range, or if it covers that range in separate bands.
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Old October 2nd, 2011, 12:01 AM   #6
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Re: Spectrum analyzer for working with wireless mics

Just ordered one of the units to search for open blocks.... as I'm running my radio mics in the 740-820 Mhz range (which supposedly to go soon) I cant imagine it's going to all disappear rapidly.... (but I could be wrong)
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Old October 2nd, 2011, 03:26 AM   #7
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Re: Spectrum analyzer for working with wireless mics

Brian... Could you write up a review after testing?
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Old October 27th, 2011, 03:51 AM   #8
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Re: Spectrum analyzer for working with wireless mics

I received the unit today (starting to get worried after 25 days in the mail).... first impressions BRILLIANT.
No instruction book supplied but within 5 mins got my head around it.
Its actually interesting what RF is around... but very little RF action in the 750-800Mhz range where I live so that means the Sennheiser G2 radio mics that I own will be used for a lot longer. It was also interesting to see the inter-mods when 2 mics are on and not on compatible groups and how it cleaned up when compatible frequencies were selected.
I have an OB late next week and intend to take it with me, it has 4x radio mics 2x IFB channels 3x TX / RX communications setups as well as the in house systems. And in about a month I have a job 8x radio mics 4x IFB channels and 4x Communications channels.
Its also interesting watching the 800-900Mhz area with the mobile phones coming and going.
Size of the unit (without antenna) is about same as an iPhone and just over twice as thick, screen is easy to read / see.
I have included a few pics of the screen (plastic protective cover is still on the unit)
First pic of a single radio mic the second pic with the inter mods.
Attached Thumbnails
Spectrum analyzer for working with wireless mics-img_0219.jpg   Spectrum analyzer for working with wireless mics-img_0221.jpg  

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Old October 27th, 2011, 05:13 AM   #9
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Re: Spectrum analyzer for working with wireless mics

Nice review in a nutshell. Thanks, Brian!

That looks like a very useful piece of equipment.
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Old October 27th, 2011, 10:00 AM   #10
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Re: Spectrum analyzer for working with wireless mics

Looks great! I surely would like to see a version that covers VHF, at least the high half of VHF. Thanks for the review!
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Old November 4th, 2011, 11:39 PM   #11
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Re: Spectrum analyzer for working with wireless mics

I used it for the first time on a job yesterday, a venue that has given RF problems for years with radio mics has now been sorted out..... nice.
The RF tech on the OB has ordered one from his iPhone within 20 minutes of seeing / using it.
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Old November 11th, 2011, 12:26 AM   #12
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Re: Spectrum analyzer for working with wireless mics

Nice find Dean, and based on Brian's comments I bought one. It arrived inside of two weeks and for the money it's brilliant! Anyone using rf toys should have one of these...
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Old November 11th, 2011, 12:31 AM   #13
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Re: Spectrum analyzer for working with wireless mics

Glad to hear it's working out. The RC folks are pretty demanding when it comes to sorting out RF issues. For them it means the difference between a successful flight or losing a couple thousand bucks of equipment in the dirt.
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Old December 4th, 2011, 02:12 AM   #14
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Re: Spectrum analyzer for working with wireless mics

I've been watching the suppliers site and they have been selling quite a few, it seems they build them in batches of 15-20.
I still love it, with the ability to go to a job with confidence knowing that you can find potential problems before they cause major issues.

RF Explorer model WSUB1G [TES82252P] - $129.00 : Seeed Studio Bazaar, Boost ideas, extend the reach
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Old December 4th, 2011, 03:27 AM   #15
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Re: Spectrum analyzer for working with wireless mics

Thanks for the heads up Brian :) might be an update or 2 here ..

News

I operate around historical aircraft with valve wirelesess .. oh boy.

Cheers.
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