Difference between revisions of "Portsdown Output Levels"
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! style="text-align:left;"|SR | ! style="text-align:left;"|SR | ||
! style="text-align:left;"|Output Level dBm | ! style="text-align:left;"|Output Level dBm | ||
| − | ! style="text-align:left;"|MER | + | ! style="text-align:left;"|MER MiniTioune V0.6d Sharp Tuner |
| + | ! style="text-align:left;"|MER MiniTioune V0.6d Serit Tuner | ||
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|71 | |71 | ||
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|9.6 | |9.6 | ||
|25 | |25 | ||
| + | |19 | ||
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|146.5 | |146.5 | ||
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|10.1 | |10.1 | ||
|26 | |26 | ||
| + | |19 | ||
|- | |- | ||
|437 | |437 | ||
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|9.2 | |9.2 | ||
|26 | |26 | ||
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|- | |- | ||
|437 | |437 | ||
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|9.0 | |9.0 | ||
|26 | |26 | ||
| + | |25 | ||
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|1255 | |1255 | ||
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|1255 | |1255 | ||
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|5.0 | |5.0 | ||
|26 | |26 | ||
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|2400 | |2400 | ||
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|−7.0 | |−7.0 | ||
|25 | |25 | ||
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Latest revision as of 16:40, 12 January 2018
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 MiniTioune V0.6d Sharp Tuner | MER MiniTioune V0.6d Serit Tuner |
|---|---|---|---|---|
| 71 | 333 | 9.6 | 25 | 19 |
| 146.5 | 333 | 10.1 | 26 | 19 |
| 437 | 333 | 9.2 | 26 | 19 |
| 437 | 1000 | 9.0 | 26 | 25 |
| 1255 | 333 | 5.0 | 26 | 25 |
| 1255 | 1000 | 5.0 | 26 | 24 |
| 2400 | 333 | −7.0 | 25 | 19 |
| 2400 | 1000 | −7.0 | 25 | 24 |
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