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4.74 out of 5
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  • 27/05/2021

    Thank you for the very quick processing of my order (three days)

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  • 03/02/2020

    Fast delivery It did not exactly fit my needs and expectations. The analyzer needs at least a 30dB amplifier otherwise it is as deaf as a stone. It does not even indicate a a local FM radio station with an VHF antenna attached to it - unless an 30dB amplifier is in series with the antenna. I intended it to use on the IF exiting my FT1000D as a spectrum display but the bandwidth and resolution are not sufficient for such an application. The lowest span is 3Mhz and the lowest RBW is 5Khz /Kc. The display is bright and clear and very good to read. It might be a good idea to buy an additional rechargeable lithium battery for it.

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  • 07/04/2020

    Improved version with screen that can be used stand alone without needing a computer to see results. Works fine but for lower signals a 30 Db amplifier is recommended. I've ordered one but iy hasn't arrived yet (or maybe is waiting me to pick it up at work when Coronavirus crisis ends). I've also ordered a battery toavoid having to power it via USB for full portable use.

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  • 09/02/2021

    practically speaking it is USELESS!!! it is completely uncalibrated and, even following the poor calibration instructions, doesn't help. and I am not talking of 1 or 2 dB but 10 and even more dB according to the frequency and the level of the incoming signal. in the attached picture you can see an FM video signal. the central carrier is the video one while the 2 lateral are the audio carriers, 6.5 MHz apart. at a RBW=100kHz the 3 are so distorted that it's impossible to analyze them! more over the 2 audio carriers seem to be some 28 dB down the video one: and that's not true! they are 15 dB down when measured with my spectrum analyzer!!! so this equipment is really useless and I am completely unsatisfied!

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  • 13/12/2020

    RBW does not show 10,50kHz for my item. Please publish the normal firmware. Since there is a SWD port on the board, I think it is possible to write to the CPU. I would like to update the firmware at my own risk. The mixer IC has a built-in terminating resistor. No external terminating resistor for RF_IN is required. As it is, VSWR = 2. Replacing the 470uH inductor on the back of the board improved the noise floor by more than 10dB. My item has improved from -63dBm to -76dBm. But when I put the board in the aluminum case, it got a little worse. The linearity is almost satisfactory between -10dBm and -70dBm. Unfortunately, with the current specifications, this item is almost useless.

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  • 14/02/2021

    A good gadget, I use it with a noise source and a return loss bridge. It's a pity that the software is poor: a better way to set center frequency and span would be great!

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  • 05/01/2021

    I bought it to check the audio/video carrier frequency on old RF game consoles, which it does ok, but it's not easy to see the accurate spread. For the price it's amazing.

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  • 09/07/2021

    OK. Perfect components. Very functional

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  • 22/04/2021

    1000

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  • 02/03/2021

    ok

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