Frequency response of Ports A and B below 1.5 MHz?

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tracey.gardner
Posts: 1
Joined: Thu Dec 28, 2017 10:59 am

Frequency response of Ports A and B below 1.5 MHz?

Postby tracey.gardner » Thu Dec 28, 2017 11:12 am

The SDRPlay RSP2 has 3 antenna ports. For 50 ohm, port A and B and also a high-Z port.
Ports A and B are specified for reception of 1.5 MHz - 2 GHZ.

Can anybody please tell me the actual frequency response of Ports A and B below 1.5 MHz?

Many thanks

Tracey G5VU
Last edited by tracey.gardner on Thu Jan 01, 1970 12:00 am, edited 0 times in total.
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g1hbe
Posts: 350
Joined: Sat Jan 17, 2015 3:28 pm
Location: Cheshire, UK

Re: Frequency response of Ports A and B below 1.5 MHz?

Postby g1hbe » Thu Dec 28, 2017 1:54 pm

I'm sure the tech team can answer your question, but I've found that both A & B ports start to lose sensitivity below 1.5 MHz. Port B is the worst as it has the bias-T circuitry to cope with. The Hi-z port works supremely well down to a few KHz but it does not have access to the MW rejector, which is a shame. For listening to the beacon band and VLF time-signals I have to use a homebrew LPF. The RSP2 works very well at LF when treated to a decent LPF (see attached image). The hump around 100 KHz is LORAN.
Attachments
lfsmall.jpg
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Andy


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