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check the manual, DANL=-158 (dBm/Hz)+ 1.1dB/GHz, OK, then I test 2550MHz frequency (no signal here) with RBW=1KHz, should be around -125dBm, why display is – 103 dBm ? please give me a explanation for this, thank you.
Hi testpoint,
DANL is specified at 0 attenuation and max gain (maximum receiver sensitivity). If you set your reference level to -50 the BB60C will be configured for maximum sensitivity and you will see the DANL you expect.
The way our software currently works, is that the sensitivity (atten/gain) is configured automatically from the reference level. You can control the gain/atten manually in the control panel, you will need to disable the lock on those controls in the file->settings menu (or F11).
Let us know if you have additional questions.
Regards,
Andrewbut when attached the antenna, even no signal band, the floor noise still increase to -112dBm, pls check the attched picture;
I also compare another wide band receiver, with or without antenna, a little difference of floor noise. same frequency and RBW setting.
It looks like the BB60C went from -133 to -112.5, and the DRT went from -128 to -121. This probably reflects how much out-of-band energy is hitting the amplifier, and that amplifier’s linearity. My guess is the DRT uses either a more linear amp, or a smaller passband.
One thing you could try, if you need a lower noise floor in this band, is to add a band pass filter. This should remove some out-of-band energy before it hits the amplifier and bring the noise floor down.Sure, I understand. You may be interested in the SM200A when we come out with it (going in to production next month). The required filters for this are built in, and the dynamic range is much better than the BB60C, so you should see minimal increase in the noise floor when you connect an antenna. Or, if they are completely satisfied with the DRT price and performance, there’s really no compelling reason to switch.
Hi Testpoint,
More information on the SM200A here
https://signalhound.com/sm200a/Let us know if you have follow up questions.
Regards,
AndrewThat is correct. There is no configurable DSP on the unit, other than the processing associated with individual measurements (sweep/real-time/IQ). The API will be very similar to our other devices.
Regards,
AndrewMay i know what is the noise floor,noise figure,SNR of BB60C.
Typical noise floor for the BB60C at 800 MHz is around -163 dBm/Hz, so the noise figure is around 11 dB. At 2.4 GHz, typical is -159 dBm/Hz, for a noise figure of 15 dB.
I suppose SNR for the BB60C depends on a lot of things, but a good starting point might be about 44 dB for a 2 MHz signal bandwidth, including phase noise and thermal noise, if I made my measurement correctly.
Dear Justin ,
I am looking for a SDR which
1.receiver sensitivity should be -104dBm or better
2.Receiver noise figure should be 8 dB or better
Whether BB60C will satisfy with this specification or i should look for some other models?Our noise figure is higher than this, so you would have to use a preamplifier with the BB60C to meet this noise figure.
How to choose a preamp to achieve 8dB of noise figure,I mean how should I select the preamp?
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