added sync output mode #20
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In contradiction with the documentation, e4k_reg_write() was returning the value 2 upon success (the number of bytes written), not zero as documented. Patched to return zero upon success. As a consequence, this corrects also the return value of e4k_reg_set_mask() and e4k_dc_offset_calibrate().
This improves SDR performence for nearby channel interference. As a sideeffect also improves dynamic range becase ADC is not overloaded by onwanted singlas. Signed-off-by: Steve Markgraf <[email protected]>
Signed-off-by: Steve Markgraf <[email protected]>
Correct return code of e4k_reg_write().
Signed-off-by: Steve Markgraf <[email protected]>
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Sorry, I am not going to merge this. Synchronous mode doesn't work. Rtl_fm used to use synchronous mode. It produced constant minor glitches that made data decoding impossible. Don't use it. The whole "many simultaneous dongles" problem is a well-known issue related to LibUSB. All you need to do is reduce the |
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Thank you very much for your insights, will do as you said.
Best regards
…On Tue, Mar 7, 2017 at 9:19 PM, Kyle Keen ***@***.***> wrote:
Sorry, I am not going to merge this.
Synchronous mode doesn't work. Rtl_fm used to use synchronous mode. It
produced constant minor glitches that made data decoding impossible. Don't
use it.
The whole "many simultaneous dongles" problem is a well-known issue
related to LibUSB. All you need to do is reduce the DEFAULT_BUF_NUMBER in
librtlsdr.c and recompile.
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By using the -S switch, you enable sync output mode.
This will help eliminate the "Failed to submit transfer #!" error when trying to use more than four usb RTL-SDR receivers.
Based on rtl_test sync mode.