diff options
author | Holger Hans Peter Freyther <holger@moiji-mobile.com> | 2013-07-26 21:23:40 +0200 |
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committer | Holger Hans Peter Freyther <holger@moiji-mobile.com> | 2013-07-26 21:24:37 +0200 |
commit | ac98b545a8c850bdaa16dc6e70d93d33f1cceaf4 (patch) | |
tree | fea54cc447933d97d95701e18eb5aa7674c672fc | |
parent | ad10f0f533e6e702e03faffa5dd48a0044d224f3 (diff) |
sysmobts-calib: For gps the sign/difference appears to be different
For the sysmoBTS 2050 this appears to have a different sign. We can't
test this with NWL right now so we will need to see if this is a case
of ping/pong.
-rw-r--r-- | contrib/sysmobts-calib/sysmobts-calib.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/contrib/sysmobts-calib/sysmobts-calib.c b/contrib/sysmobts-calib/sysmobts-calib.c index 053032d5..a111d1d5 100644 --- a/contrib/sysmobts-calib/sysmobts-calib.c +++ b/contrib/sysmobts-calib/sysmobts-calib.c @@ -318,6 +318,16 @@ static int calib_get_clock_error(void) return -1; } + /* + * Empiric gps error determination. With revE and firmware v3.3 + * the clock error for TCXO to GPS appears to have a different + * sign. The device in question doesn't have a networklisten mode + * so it is impossible to verify that this only applies to GPS. + */ + if (source == SuperFemto_ClkSrcId_GpsPps) + clkErr *= -1; + + /* this is an absolute clock error */ printf("The calibration value is: %d\n", clkErr); return 0; |