Search found 494 matches
- Thu Jun 29, 2017 11:47 am
- Forum: General
- Topic: SDRConsole and SDRplay
- Replies: 5
- Views: 15718
Re: SDRConsole and SDRplay
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...
- Wed Jun 28, 2017 9:14 pm
- Forum: General
- Topic: SDRConsole and SDRplay
- Replies: 5
- Views: 15718
Re: SDRConsole and SDRplay
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?
- Mon Jun 26, 2017 3:35 pm
- Forum: SDR Antennas
- Topic: Long Wire Antenna Performance Questions
- Replies: 7
- Views: 36558
Re: Long Wire Antenna Performance Questions
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...
- Fri Jun 23, 2017 8:19 am
- Forum: General
- Topic: "Near Field" definition?
- Replies: 1
- Views: 6148
Re: "Near Field" definition?
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...
- Sat Jun 17, 2017 11:59 pm
- Forum: SDR Antennas
- Topic: Longwire antenna question
- Replies: 7
- Views: 29351
Re: Longwire antenna question
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.
- Wed Jun 14, 2017 10:33 am
- Forum: General
- Topic: RSP1 susceptibility to a DC voltage on its input?
- Replies: 3
- Views: 10216
Re: RSP1 susceptibility to a DC voltage on its input?
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. ...
- Tue Jun 13, 2017 2:39 pm
- Forum: General
- Topic: RSP-1 or RSP-2?
- Replies: 3
- Views: 12523
Re: RSP-1 or RSP-2?
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...
- Mon Jun 05, 2017 6:24 am
- Forum: SDRuno
- Topic: Liking SDRUno
- Replies: 2
- Views: 8571
Re: Liking SDRUno
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...
- Wed May 31, 2017 7:43 am
- Forum: SDRuno
- Topic: Channel Skew Adjustment Procedure
- Replies: 4
- Views: 13912
Re: Channel Skew Adjustment Procedure
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...
- Fri May 26, 2017 3:50 pm
- Forum: SDRuno
- Topic: Channel Skew Adjustment Procedure
- Replies: 4
- Views: 13912
Re: Channel Skew Adjustment Procedure
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...