SNR is supposed to be reported by the frontend drivers in dB, so print
it that way for drivers which implement it properly.
---
util/femon/femon.c | 19 ++++++++++++++-----
1 file changed, 14 insertions(+), 5 deletions(-)
--- dvb-apps-3ee111da5b3a.orig/util/femon/femon.c 2013-06-02
14:05:00.988323437 +0200
+++ dvb-apps-3ee111da5b3a/util/femon/femon.c 2013-06-02 14:05:33.560792474
+0200
@@ -102,11 +102,20 @@ int check_frontend (struct dvbfe_handle
fe_info.lock ? 'L' : ' ');
if (human_readable) {
- printf ("signal %3u%% | snr %3u%% | ber %d | unc %d | ",
- (fe_info.signal_strength * 100) / 0xffff,
- (fe_info.snr * 100) / 0xffff,
- fe_info.ber,
- fe_info.ucblocks);
+ // SNR should be in units of 0.1 dB but some drivers do
+ // not follow that rule, thus this heuristic.
+ if (fe_info.snr < 1000)
+ printf ("signal %3u%% | snr %4.1fdB | ber %d |
unc %d | ",
+ (fe_info.signal_strength * 100) /
0xffff,
+ fe_info.snr / 10.,
+ fe_info.ber,
+ fe_info.ucblocks);
+ else
+ printf ("signal %3u%% | snr %3u%% | ber %d |
unc %d | ",
+ (fe_info.signal_strength * 100) /
0xffff,
+ (fe_info.snr * 100) / 0xffff,
+ fe_info.ber,
+ fe_info.ucblocks);
} else {
printf ("signal %04x | snr %04x | ber %08x | unc %08x |
",
fe_info.signal_strength,
--
Jean Delvare
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