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RF EXPLORER WSUB1G vs lectro internal freq scan

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has anyone tested and used the rf explorer WSUB1G and compared with the ucr 411 freq scan, specially when working with bag with several wireless mics from differents blocks and frequencies range i need a a wider rf scan, from block 24 to block 29 (included some sennheiser for camera hops in range b. 
Does it worth the money ? 
 

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Here's a pic of what the same window looks like (block 21) on the explorer and SRb. Main advantages to explorer is you can adjust the noise floor/threshold to see more detail on Y-axis, and you can set it to average the readings over up to 28 iterations of the sweep, helpful for finding intermittent or spurious interference!

IMG_20200110_222135.jpg

I will let you know how the RTL-SDR works out, one advantage I see is you can tune the channels in FM and actually listen, which might help nail down the source of interference.

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I have a couple different versions of the RF Explorer.  Personally I've found that the center of frequencies that appear in it's "scan" can be off by as much as 5Mhz.  For that reason I don't trust the specific frequency numbers that it displays.  However it is helpful for showing "relative" frequencies especially when you see two on top of each other, but only one is coming from you!  I'd rather trust the scan on the Lectro receiver, in spite of the limited info that it provides.

 

Tom

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Hi there,

 

RF Explorer internal frequency is correct in range of +/-2Khz if calibrated. The reason you may see up to 5MHz deviation is not due to frequency accuracy, but screen resolution. To understand how the screen becomes a limitation in your measurement is important to get the best out of the instrument:

  • RF Explorer has 112 pixels to represent horizontal spectrum. Therefore, if you select a frequency span of, say, 1MHz, you get 1,000KHz/112=8.9KHz resolution per screen point. If you select a frequency span of 100MHz the resolution now becomes 100,0000KHz/112=892KHz, etc.
  • For best results in normal operation, you should use a large span to start, say 30MHz in the picture above, to locate point of interests. Then move to narrow span to get higher resolution frequency read.
  • If you need to read frequency with higher resolution, click ENTER once to enter Advanced Mode, then use RIGHT key to reduce span and, therefore, increase resolution. Or use FREQUENCY MENU to select a new center frequency of your choice, and a smaller span value.
  • It also becomes very useful to pre-record your frequencies of interest with large and narrow spans, using Presets, so a single click can help you navigate through your frequencies of interest using high and low resolution as needed. For more details www.rf-explorer.com/preset

Hope this helps

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9 hours ago, LoganSound said:

Here's a pic of what the same window looks like (block 21) on the explorer and SRb. Main advantages to explorer is you can adjust the noise floor/threshold to see more detail on Y-axis, and you can set it to average the readings over up to 28 iterations of the sweep, helpful for finding intermittent or spurious interference!

IMG_20200110_222135.jpg

I will let you know how the RTL-SDR works out, one advantage I see is you can tune the channels in FM and actually listen, which might help nail down the source of interference.

Ive got a sdr nooelec used with android smartphone app. Ive Heard the app Touchstone pro would work with and sdr usb dongle but they have Never  answered. The limit of the sdr dongle is the 2Mhz visualization.

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11 hours ago, RF Explorer Team said:

Hi there,

 

RF Explorer internal frequency is correct in range of +/-2Khz if calibrated. The reason you may see up to 5MHz deviation is not due to frequency accuracy, but screen resolution. To understand how the screen becomes a limitation in your measurement is important to get the best out of the instrument:

  • RF Explorer has 112 pixels to represent horizontal spectrum. Therefore, if you select a frequency span of, say, 1MHz, you get 1,000KHz/112=8.9KHz resolution per screen point. If you select a frequency span of 100MHz the resolution now becomes 100,0000KHz/112=892KHz, etc.
  • For best results in normal operation, you should use a large span to start, say 30MHz in the picture above, to locate point of interests. Then move to narrow span to get higher resolution frequency read.
  • If you need to read frequency with higher resolution, click ENTER once to enter Advanced Mode, then use RIGHT key to reduce span and, therefore, increase resolution. Or use FREQUENCY MENU to select a new center frequency of your choice, and a smaller span value.
  • It also becomes very useful to pre-record your frequencies of interest with large and narrow spans, using Presets, so a single click can help you navigate through your frequencies of interest using high and low resolution as needed. For more details www.rf-explorer.com/preset

Hope this helps

I use mine in 'Max Hold' mode and run it while recording in the hope it'll pick up intermittent interference should it happen. Am I right in thinking a direct 'hit' on 1 of my freqs would present as an increase in amplitude of 1 of my existing 'spikes' (and therefore need to leave some headroom for this to show)? 

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18 hours ago, daniel said:

I use mine in 'Max Hold' mode and run it while recording in the hope it'll pick up intermittent interference should it happen. Am I right in thinking a direct 'hit' on 1 of my freqs would present as an increase in amplitude of 1 of my existing 'spikes' (and therefore need to leave some headroom for this to show)? 

 

Yes, an increase of amplitude in MaxHold mode may clearly indicate an interferer higher than your expected signal link at that specific frequency.

You can refresh MaxHold levels anytime using RETURN key.

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An advantage of the RF exdporer is that it shows the spectrum in real time.

Sometimes I see temporal bursts at bands that otherwise are emty.

These are not picked up with a single sweep scan, i'd think.

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An advantage of using a SDR receiver, be it a cheap RTL or something more expensive like a SDRPlay (or Airspy) is that the SDR work as "real time spectrum analyzers" while the RF Explorer and others (like my Siglent SVA1000X) are classical sweeping analyzers.

 

The difference is: A sweeping analyzer is not monitoring the whole SPAN bandwidth simultaneously, but sweeping a receiver over the frequency range and sampling amplitudes. So there is a chance that a very quick burst may be missed. Of course if you leave it in peak hold mode and have it running for several minutes the detection probability will be high.

 

A real time analyzer, however, samples a whole chunk of spectrum (1 MHz or so for the RTL, 8 or 10 MHz or so for the SDRPlay and the Airspy) and calculates a Fourier transform, which means it is sampling the SPAN at once. So even really short bursts can be made visible.

 

But the disadvantages of using a SDR are too many. You need more equipment (computer), SPAN is limited unless you buy a really expensive one (10 MHz or less) and complexity skyrockets because you need SDR software running on the computer. And at least all of the SDR software I know is a royal p.i.t.a. so unusable in a demanding situation like a shot or stage where you need to focus 200% on everything else.

 

On the other hand, if anyone is considering a full RTA, it would be a huge overkill and the minimum prices are in the thousands of dollars. Such units are useful for people who design digital communications equipment, especially if doing bursty transmissions. 

 

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On 1/11/2020 at 1:33 PM, RF Explorer Team said:

Hi there,

 

RF Explorer internal frequency is correct in range of +/-2Khz if calibrated. The reason you may see up to 5MHz deviation is not due to frequency accuracy, but screen resolution. To understand how the screen becomes a limitation in your measurement is important to get the best out of the instrument:

  • RF Explorer has 112 pixels to represent horizontal spectrum. Therefore, if you select a frequency span of, say, 1MHz, you get 1,000KHz/112=8.9KHz resolution per screen point. If you select a frequency span of 100MHz the resolution now becomes 100,0000KHz/112=892KHz, etc.
  • For best results in normal operation, you should use a large span to start, say 30MHz in the picture above, to locate point of interests. Then move to narrow span to get higher resolution frequency read.
  • If you need to read frequency with higher resolution, click ENTER once to enter Advanced Mode, then use RIGHT key to reduce span and, therefore, increase resolution. Or use FREQUENCY MENU to select a new center frequency of your choice, and a smaller span value.
  • It also becomes very useful to pre-record your frequencies of interest with large and narrow spans, using Presets, so a single click can help you navigate through your frequencies of interest using high and low resolution as needed. For more details www.rf-explorer.com/preset

Hope this helps

Hi, ive just purchased an rf Explorer but i dont see any advanced menu option to get the span view setting. 

 

 

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What is the level of the background rf energy to work safely?

For example I set 650 Mhz as my working frequency  on my wireless mic and Rf explorer get an average  rf background energy of -55 dbm,  what kind of problems can happens, what should be the rf background energy level to work without risk of dropping?

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