Monitoring Frequency Satellite and Local Noise

[agung_ap]

Hallo Everyone,

My name Agung From Indonesian, I have USB-SA44B and my plan is monitoring our carrier our Freq satellite with this device.

I have been getting our carrier screen display on SA44B but there is a problem that we found is visible high carrier that arise and move on our other spectrum and become a interference to the HUB to lock the satelite frequency

so how are we to eliminate noise or interference caused by SA44B?

Thanks for your attention and advice.

Regards,

Agung Priyono Gunawan

• This topic was modified 8 years, 7 months ago by agung_ap.

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What do you have connected? and how are they connected?
i.e. draw a schematic.

Hi Jared,

Thanks for your attention.

The schematic are like this On antenna VSAT from (LNB) with cable Coaxial to 4 Ways Splitter and from the splitter are connected port 1 connected to LNB, port 2 Modem Satellite, port 3 Portable Spectrum and port 4 Signal Hound SA44B, my Plan is This signal Hound I will access online from Computer with Other Computer.

But the problem is SA44B shot Local interference to our Received like Spike move and move to our carrier so that our HUB can’t locked the signal when the Local interference has came caused it shot the our carrier (please find attachment From our Portable Spectrum)

so is there feature from Signal Hound that we can do to eliminate noise or interference caused by SA44B like from my attachment?

Thanks
Regards,

Agung Priyono Gunawan

Agung,
If the problem is that the USB-SA44B has some LO feedthru which is causing interference, there are several ways to mitigate this.
1) Use a reference level of -30 dBm. This will turn on the RF preamplifier, which also blocks LO leakage. Your leakage should be well below -50 dBm in this state.
2) Add an external 20 dB pad to the input of the SA44B and increase the sensitivity by lowering the reference level. With a 20 dB pad, and a reference level of -40 dBm, your LO leakage should be around -70 dBm.
3) If this is not enough, switching to the BB60C is recommended. Its LO feedthrough is below -80 dBm in all modes, and the LO frequency is >2.4 GHz higher than the signal, so it is very unlikely to interfere.

Hi Justin,

Ok I will Try..

Thanks

Regars,
Agung Priyono Gunawan

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