diff options
| author | Harald Welte <laforge@gnumonks.org> | 2017-03-24 10:41:04 +0100 |
|---|---|---|
| committer | Harald Welte <laforge@gnumonks.org> | 2017-04-06 18:41:01 +0200 |
| commit | bbe90fd6511c9a0abdb5f41d13c5ab0135b903f7 (patch) | |
| tree | 70b1f03f31d9b84b1b1bf5f00787bc7cf2cadc6b /src/osmo-bts-sysmo | |
| parent | e16b59357411ffa4903ac110ac4ce46d343e878d (diff) | |
sysmobts: Don't start with 0dBm TRX output power before ramping
In case a system has a high-gain external PA (like a 40dB PA) connected
externally, we cannot simply switch the transceiver to 0 dBm in
trx_init() only to then start the ramping at much lower levels once the
PHJ completes in trx_init_compl_cb(). The result would be a short
0 + 40 dBm spike followed by later ramping. We want to avoid that
spike, particularly its associated inrush current, so let's bring up the
board with smething very conservative like -50 dBm, and then ramp from
there.
Change-Id: I0ad91fce64f65e0213c9fcfde3390ace519055db
Fixes: SYS#3259
Diffstat (limited to 'src/osmo-bts-sysmo')
| -rw-r--r-- | src/osmo-bts-sysmo/oml.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/osmo-bts-sysmo/oml.c b/src/osmo-bts-sysmo/oml.c index 01752d18..776a50c4 100644 --- a/src/osmo-bts-sysmo/oml.c +++ b/src/osmo-bts-sysmo/oml.c @@ -389,6 +389,7 @@ static int trx_init(struct gsm_bts_trx *trx) GsmL1_MphInitReq_t *mi_req; GsmL1_DeviceParam_t *dev_par; int femto_band; + int initial_mdBm = power_ramp_initial_power_mdBm(trx); if (!gsm_abis_mo_check_attr(&trx->mo, trx_rqd_attr, ARRAY_SIZE(trx_rqd_attr))) { @@ -416,11 +417,12 @@ static int trx_init(struct gsm_bts_trx *trx) dev_par->fRxPowerLevel = trx_ms_pwr_ctrl_is_osmo(trx) ? 0.0 : btsb->ul_power_target; - dev_par->fTxPowerLevel = 0.0; + dev_par->fTxPowerLevel = ((float) initial_mdBm) / 1000; LOGP(DL1C, LOGL_NOTICE, "Init TRX (ARFCN %u, TSC %u, RxPower % 2f dBm, " "TxPower % 2.2f dBm\n", dev_par->u16Arfcn, dev_par->u8NbTsc, dev_par->fRxPowerLevel, dev_par->fTxPowerLevel); - + trx->power_params.p_total_cur_mdBm = trx->power_params.ramp.max_initial_pout_mdBm; + /* send MPH-INIT-REQ, wait for MPH-INIT-CNF */ return l1if_gsm_req_compl(fl1h, msg, trx_init_compl_cb, NULL); } |