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RF Explorer Team

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    RF Explorer questions, requests and information
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  1. An noise floor or "rf background" of -55dBm is pretty high, you may get any sort of interference in such an environment. What you are interested in measuring is not absolute but relative levels, that is, how much stronger is your received microphone signal from the noise floor. You should typically be about 20dB higher to play safe, assuming of course your RF Explorer is close to your microphone receiver station so you measure what your station will get.
  2. 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.
  3. 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
  4. Yes, in the presence of out-of-band, strong signals such as the one produced by a microwave oven, the signal can produce intermodulation inside a receiver or an instrument.
  5. Thanks for the added details, that makes sense. The new WSUB1G+ model has a very effective low pass filter in the RF input stage. This filter prevents any signal higher than 960MHz to produce false intermodulation in the instrument, or saturate sensitive electronics producing spurs. That is not the case with the original simpler WSUB1G model. Therefore what you see is most likely a false reading produced by the strong 2.4GHz signal entering the instrument and creating internal spurs. To test this, you only need an external 1GHz low pass filter connected between the WSUB1G RF port and the antenna, it will behave the same as the WSUB1G+ as far as this signal is concerned. Best, RF Explorer Team
  6. Hi AlenK, The new RF Explorer WSUB1G PLUS is likely the model being presented in this thread as VHF/UHF, and being compared with RF Explorer WSUB1G standard model. If that is correct, please note the new, more advanced model has internal DSP features that, when enabled, may take a few milliseconds longer to complete a sweep by doing a better filtering of <spurs / false signals> which were not filtered by RF Explorer WSUB1G standard model. You can still run the WSUB1G PLUS model in the same way as standard model, if you prefer, being faster: select DSP:Fast mode in the CONFIG MENU. The DSP selection allows you to switch filter / no filter spur signals so you are always in control. More details in the DSP section of the user manual www.rf-explorer.com/manual Regards RF Explorer Team
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