Difference between revisions of "Portsdown Output Levels"
Jump to navigation
Jump to search
| Line 52: | Line 52: | ||
===Spectrum plots of version 1a=== | ===Spectrum plots of version 1a=== | ||
| − | |||
[[File:mod after.JPG|400px]] | [[File:mod after.JPG|400px]] | ||
| + | 1255MHz, 333ks, 5MHz/division | ||
| − | |||
[[File:333ks.JPG|400px]] | [[File:333ks.JPG|400px]] | ||
| + | 1255MHz, 333ks, 500KHz/division | ||
| − | |||
[[File:1ms.jpg|400px]] | [[File:1ms.jpg|400px]] | ||
| + | 1255MHz, 1Ms, 5MHz/division | ||
| − | |||
[[File:2ms.jpg|400px]] | [[File:2ms.jpg|400px]] | ||
| + | 1255MHz, 2Ms, 5MHz/division | ||
| − | |||
[[File:4ms.jpg|400px]] | [[File:4ms.jpg|400px]] | ||
| + | |||
| + | 1255MHz, 4Ms, 5MHz/division | ||
Revision as of 17:12, 6 April 2017
The typical performance for a well-adjusted Portsdown Filter-modulator board, being driven by a black ADF4351 module through a VCO Filter is as follows:
| Frequency MHz | SR | Output Level dBm | MER dB from MiniTioune V0.5a |
|---|---|---|---|
| 71 | 333 | 9.6 | 25 |
| 146.5 | 333 | 10.1 | 26 |
| 437 | 333 | 9.2 | 26 |
| 437 | 1000 | 9.0 | 26 |
| 1255 | 333 | 5.0 | 26 |
| 1255 | 1000 | 5.0 | 26 |
| 2400 | 333 | −7.0 | 25 |
| 2400 | 1000 | −7.0 | 25 |
These figures were measured by G8GKQ using a Version 1 board (as sold by the BATC Shop in Jan/Feb 2017) modified to Version 1a standard. The measured performance of the the factory-assembled V1a boards was very similar. Figures are included for 2.4 GHz out of interest - this is well outside the specification for the board.
Spectrum plots of version 1a
1255MHz, 333ks, 5MHz/division
1255MHz, 333ks, 500KHz/division
1255MHz, 1Ms, 5MHz/division
1255MHz, 2Ms, 5MHz/division
1255MHz, 4Ms, 5MHz/division