diff options
| author | Manu Abraham <abraham.manu@gmail.com> | 2007-09-26 18:32:13 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2008-12-29 17:53:17 -0200 |
| commit | d98c02859fbeefe19e6b182997c6a8b3c9c32acc (patch) | |
| tree | 08036e298eb362a52cee34c43a983934a9fc3421 /drivers/media/dvb | |
| parent | 421b2970d24f7571039b29e6726bce1608578ac4 (diff) | |
V4L/DVB (9407): Optimizations Reduce capture range from 10MHz to 3Mhz
* Reduces szapping time a lot
* increased stability at Low Symbol rates
* overall increases reliability in tuning
Signed-off-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/dvb')
| -rw-r--r-- | drivers/media/dvb/frontends/stb0899_drv.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/media/dvb/frontends/stb0899_drv.c b/drivers/media/dvb/frontends/stb0899_drv.c index ce1016eed80..67f6edfa7e5 100644 --- a/drivers/media/dvb/frontends/stb0899_drv.c +++ b/drivers/media/dvb/frontends/stb0899_drv.c @@ -1481,8 +1481,8 @@ static enum dvbfe_search stb0899_search(struct dvb_frontend *fe, struct dvbfe_pa } dprintk(verbose, FE_DEBUG, 1, "delivery system=%d", state->delsys); -// SearchRange = 3000000; /* Search Bandwidth (3 Mhz, was initially 10 Mhz) */ - SearchRange = 10000000; /* Search Bandwidth (3 Mhz, was initially 10 Mhz) */ + SearchRange = 3000000; /* Search Bandwidth (3 Mhz, was initially 10 Mhz) */ +// SearchRange = 10000000; /* Search Bandwidth (3 Mhz, was initially 10 Mhz) */ dprintk(verbose, FE_DEBUG, 1, "Frequency=%d, Srate=%d", i_params->freq, i_params->srate); /* checking Search Range is meaningless for a fixed 3 Mhz */ if (INRANGE(i_params->srate, 1000000, 45000000)) { @@ -1521,7 +1521,7 @@ static enum dvbfe_search stb0899_search(struct dvb_frontend *fe, struct dvbfe_pa /* What to do for tuners having no bandwidth setup ? */ if (state->config->tuner_set_bandwidth) - state->config->tuner_set_bandwidth(fe, (13 * (stb0899_carr_width(state) + 10000000)) / 10); + state->config->tuner_set_bandwidth(fe, (135 * (stb0899_carr_width(state) + SearchRange)) / 100); if (state->config->tuner_get_bandwidth) state->config->tuner_get_bandwidth(fe, &internal->tuner_bw); /* Set DVB-S1 AGC */ @@ -1553,7 +1553,7 @@ static enum dvbfe_search stb0899_search(struct dvb_frontend *fe, struct dvbfe_pa internal->srch_range = SearchRange; if (state->config->tuner_set_bandwidth) - state->config->tuner_set_bandwidth(fe, (stb0899_carr_width(state) + 10000000)); + state->config->tuner_set_bandwidth(fe, (135 * (stb0899_carr_width(state) + SearchRange)) / 100); if (state->config->tuner_get_bandwidth) state->config->tuner_get_bandwidth(fe, &internal->tuner_bw); |