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transceiver: fix bug in setting low-level attenuation

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This patch fixes some confusion in gain vs. attenuation
setting. The UHD device is controlled through gain
settings but OpenBTS represents gain in terms of
attenuation relative to maximum - 0 dB attenuation.

Signed-off-by: Thomas Tsou <ttsou@vt.edu>

git-svn-id: http://wush.net/svn/range/software/public/openbts/trunk@2662 19bc5d8c-e614-43d4-8b26-e1612bc8e597
This commit is contained in:
Kurtis Heimerl
2011-11-26 03:18:11 +00:00
parent 382fa91b2d
commit 4c7771a50e
1 changed files with 3 additions and 3 deletions
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6
Transceiver52M/radioInterface.cpp
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@@ -103,10 +103,10 @@ double RadioInterface::fullScaleOutputValue(void) {
void RadioInterface::setPowerAttenuation(double atten)
{
double rfAtten, digAtten;
double rfGain, digAtten;
rfAtten = mRadio->setTxGain(mRadio->maxTxGain() - atten);
digAtten = atten - rfAtten;
rfGain = mRadio->setTxGain(mRadio->maxTxGain() - atten);
digAtten = atten - mRadio->maxTxGain() + rfGain;
if (digAtten < 1.0)
powerScaling = 1.0;