Hoernchen has uploaded this change for review.
ms: adjust tx scaling for tx samples
The "safe" scaling factor introduced in
7ac54b10d3373865cddd0f2e3821b0346cb9dd7c is too low and dates back to
the beginning and the move from usrp1->uhd, but the modulator will
exceed +-1 so "proper" scaling leads to overflows. Let's just do what
osmotrx has been doing for many years...
Change-Id: I75a2eba1f7f7b81249c06ce3fc9dfeee08878cb9
---
M Transceiver52M/ms/ms.cpp
M Transceiver52M/ms/uhd_specific.h
2 files changed, 17 insertions(+), 2 deletions(-)
git pull ssh://gerrit.osmocom.org:29418/osmo-trx refs/changes/42/31642/1
diff --git a/Transceiver52M/ms/ms.cpp b/Transceiver52M/ms/ms.cpp
index 6f63a73..ec2c5f8 100644
--- a/Transceiver52M/ms/ms.cpp
+++ b/Transceiver52M/ms/ms.cpp
@@ -58,7 +58,7 @@
pthread_setschedparam(pthread_self(), SCHED_FIFO, &sch_params);
auto burst = genRandAccessBurst(0, 4, 0);
- scaleVector(*burst, t->txFullScale * 0.7);
+ scaleVector(*burst, t->txFullScale);
// float -> int16
blade_sample_type burst_buf[burst->size()];
diff --git a/Transceiver52M/ms/uhd_specific.h b/Transceiver52M/ms/uhd_specific.h
index edf7f79..8295a54 100644
--- a/Transceiver52M/ms/uhd_specific.h
+++ b/Transceiver52M/ms/uhd_specific.h
@@ -82,7 +82,7 @@
{
delete[] one_pkt_buf;
}
- uhd_hw() : rxFullScale(32767), txFullScale(32767), rxtxdelay(-67)
+ uhd_hw() : rxFullScale(32767), txFullScale(32767 * 0.3), rxtxdelay(-67)
{
}
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