woodpecker
Member
- Joined
- Aug 7, 2005
- Messages
- 729
After almost 3 months of waiting, firmware 1810A has finally appeared for the DV10, using the cumbersome I/Q feature where you have to keep removing the SD here are some initial measurements.
With the "new feature" of being able to adjust the XTAL offset (something a user should never have to do) I still can only get my DV10 to within 180Hz of being on frequency.
Radio warmed up, 452.000 MHz AM signal 30% modulated with a 1kHz tone fed into an RSP1A and DV10 at the same time.
The RSP1A reads 20Hz off frequency, excellent.
The DV10 with an XTAL offset of:-
0000 is 1.1kHz off frequency
+5000 is 640Hz off frequency
+9990 (max available) still 180Hz off frequency
There are 1 set of measurements at 1 ambient temperature not across the -10 to +50C operating range.
The attached images show the 3 offsets selected and the resulting frequency error in sdr#
In each image the top is the RSP1A, below the DV10 I/Q recording.
If this is the best they can come up with in 3 months, its clear they cannot fix it with firmware.
With the "new feature" of being able to adjust the XTAL offset (something a user should never have to do) I still can only get my DV10 to within 180Hz of being on frequency.
Radio warmed up, 452.000 MHz AM signal 30% modulated with a 1kHz tone fed into an RSP1A and DV10 at the same time.
The RSP1A reads 20Hz off frequency, excellent.
The DV10 with an XTAL offset of:-
0000 is 1.1kHz off frequency
+5000 is 640Hz off frequency
+9990 (max available) still 180Hz off frequency
There are 1 set of measurements at 1 ambient temperature not across the -10 to +50C operating range.
The attached images show the 3 offsets selected and the resulting frequency error in sdr#
In each image the top is the RSP1A, below the DV10 I/Q recording.
If this is the best they can come up with in 3 months, its clear they cannot fix it with firmware.
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