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安诺尼IsoLOG 3D测向天线空中信号测向问题

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#1 2023-04-06 09:53
我正在尝试使用安诺尼IsoLOG 3D测向天线对1850 MHz的信号进行测向,使用1850 MHz作为中心频率,实时带宽为92 MHz。但是,我可以很好地对1850 MHz的信号进行测向,但我根本无法对1865 MHz进行测向。频谱图(我指的是"IQ directional finding" block中的频谱图)完全相同,甚至在不断重复扫描的扇区(在chopper模式下)中也是在两者的顶部。以下文件是一张图片和一段视频,图片用于1850 MHz信号,测向良好且稳定,但.gif文件用于1865 MHz信号,工作不正常。



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#2 2023-04-06 09:54

您是否设置了Filter Direction和Time Compression的缓存?
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#3 2023-04-06 10:05

Customer:
Filter direction is 5%
And time compression is 10 units with the type of average or power.
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Support:
Use the posted settings. Your settings are far to low.
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Customer:
that may solve the problem, but we want to DF e.g., the burst signals (signals with low exiting time) in a given frequency band, BTW I think extending time compression or filter direction just doesn't make sense in our problem. Am I right? Is there any other suggestion for us to do?
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Support:
Tracking single short bursts only works with the chopper mode hardware option.
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Customer:
I know it
I have chopper mode option and doing the mission on 500 us chopper time with generic mode.
But I want to know how may I perform DF on burst signals while I can't even DF the common LTE signals in the air without missing real time option.

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Support:
Why don't you use the settings we posted?
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Customer:
sorry for the late response.
actually, I'm using your settings. except time compression and filter direction.
my time compression is 100 and my filter direction is 5-10%.
increasing time compression more than this make my DF system not to be real-time.
Do you have any suggestion to catch burst signals like CW signals without the loss of being real-time?

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Support:
Set the chopper time to 12 µs. 500µs is way too long.
Then you can collect much more data and increase the compression and filter settings to our specified values.
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