diff options
| author | Matthias P. Braendli <matthias.braendli@mpb.li> | 2018-05-14 11:03:12 +0200 |
|---|---|---|
| committer | Matthias P. Braendli <matthias.braendli@mpb.li> | 2018-05-14 11:03:12 +0200 |
| commit | 6abb6defb379880000a7a8bb2021537e4ca53007 (patch) | |
| tree | 0eed2c0091b8a77c68472a81b365865f913808b8 /dpd/README.md | |
| parent | 1890439e8786feaaf4fa6612289812984a0c75e9 (diff) | |
| download | dabmod-6abb6defb379880000a7a8bb2021537e4ca53007.tar.gz dabmod-6abb6defb379880000a7a8bb2021537e4ca53007.tar.bz2 dabmod-6abb6defb379880000a7a8bb2021537e4ca53007.zip | |
DPDCE: disable tx gain agc by default
Diffstat (limited to 'dpd/README.md')
| -rw-r--r-- | dpd/README.md | 14 |
1 files changed, 6 insertions, 8 deletions
diff --git a/dpd/README.md b/dpd/README.md index fc84bad..307a2f5 100644 --- a/dpd/README.md +++ b/dpd/README.md @@ -103,14 +103,12 @@ This configuration file is different from usual defaults in several respects: * 4x oversampling: 8192000 sample rate * a very small digital gain, which will be overridden by the DPDCE * predistorter enabled - * UHD output with a rather low TX gain, which will be overridden by DPDCE - -The DPDCE uses automatic gain control for both TX and RX gain to get both a -high quantisation quality for the most frequent amplitude regions and a high -enough back-off so the peaks are also quantised correctly. This means that the -output power will stay at the same level, but the DPDCE may change TX gain to -trade it with digital gain and also change RX gain. This also implies that you -should *not modify txgain, rxgain, digital gain or coefficient settings manually!* + +The TX gain should be chosen so that you can drive your amplifier into +saturation with a digital gain of 0.1, so that there is margin for the DPD to +operate. + +You should *not modify txgain, rxgain, digital gain or coefficient settings manually!* When the DPDCE is used, it controls these settings, and there are command line options for you to define initial values. |