SDRplay Community Forum

Ah. The error at VHF seems to be about 50 KHz, but at low frequencies it is 5 KHz. This suggests an error in the reference oscillator, but it's a much bigger error than we normally see, and probably way beyond the calibration adjustment. I'm assuming you've tried a different program such as SDRUno o...

Is the frequency offset always the same, regardless of the frequency you enter (ie LF or VHF)? Or does the offset get worse the higher the frequency?

Ultravista - As Danube said, the two connections input connections on the balun form a 'differential' input. If you put the same signal on each end, they will cancel and there will be no output. Obviously a pair of wires twisted together are picking up the same signal so they should not be connected...

Hi. My RSP2 is fed from a Wellbrook loop (or sometimes a random wire) only a few metres from my 160m vertical (it's for the 160m band, not 160m tall!) and I've not had any problems. I use fairly modest power levels though, never more than 35 watts PEP. One thing as amazed me - if I keep the power do...

Are you selecting the Hi-z input? You have to click on the Hi-z button. Other than that I can't think of much. The RSP is very sensitive on all bands.

Just to play devil's advocate! I'd be wary of building any bias-T without a DC blocking cap on the receiver side. It may be OK for the RSP1, but if you get into the habit of using a DC-coupled bias-T you may absent-mindedly attach it to something that is NOT AC coupled and then you'd be in trouble. ...

I agree with Mike. The 2 uses the same receiver chips as the 1 so it has the same basic performance, but the added flexibility of the three antenna inputs and the better controllability of the front-end gain make it better in use. Then there is the bias-T on one input which gets rid of the extra box...

Paul I use the Hi-z input for all my LF, MF and HF operation and it has a very good response right down to a few kHz, much better than the two SMA inputs. In fact SDRPlay recommend the Hi-z input for these bands. I'm not sure of the response above 30 MHz but the SMA inputs work well from 30 MHz to U...

I must admit I haven't seen the 1,2,3 settings, and I'm away from home now so I can't check. Optimum balance does seem to change with frequency, so perhaps they are pre sets as you suggest. I've found the auto setting works well enough. Your noise level seems high (or your signals low). Is everythin...

I've found the best way to adjust I/Q balance is to tune in a very strong signal and position it on one side of the waterfall display. Look in the same position on the other side of the display for a mirror image. If you can't see one, then you probably don't need to adjust anything! If you do see o...