diff options
Diffstat (limited to 'share/man/man4/nmea.4')
-rw-r--r-- | share/man/man4/nmea.4 | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/share/man/man4/nmea.4 b/share/man/man4/nmea.4 index bd119a1819b..c088810884c 100644 --- a/share/man/man4/nmea.4 +++ b/share/man/man4/nmea.4 @@ -1,6 +1,6 @@ -.\" $OpenBSD: nmea.4,v 1.12 2006/11/29 07:32:08 jmc Exp $ +.\" $OpenBSD: nmea.4,v 1.13 2007/03/19 06:42:36 mbalmer Exp $ .\" -.\" Copyright (c) 2006 Marc Balmer <mbalmer@openbsd.org> +.\" Copyright (c) 2006, 2007 Marc Balmer <mbalmer@openbsd.org> .\" .\" Permission to use, copy, modify, and distribute this software for any .\" purpose with or without fee is hereby granted, provided that the above @@ -53,8 +53,8 @@ If the attached device sends the GPRMC message in the 13-field format, the operation mode of the GPS device is reported in the sensor description. The sensor timestamp is copied from the tty timestamp if a device with PPS is being used and tty timestamping has been turned on. -Otherwise the sensor timestamp is taken when the initial `$' character is -received from the NMEA device. +Otherwise the sensor timestamp is taken when the initial `$' character of +a message block is received from the NMEA device. .El .Sh SENSOR STATES The quality of the timedelta is reported as the sensor status: @@ -66,6 +66,10 @@ The timedelta is safe to use for applications like .It WARN The attached GPS receiver indicates a warning condition. The timedelta should be used with care. +.It CRITICAL +tty timestamping has been turned on but there is no PPS signal present. +Check you hardware. +Some GPS units need PPS to be manually turned on. .El .Sh SEE ALSO .Xr tty 4 , |