doc: Document APRS offset configuration value

[fw/altos] / doc / aprs-operation.inc

diff --git a/doc/aprs-operation.inc b/doc/aprs-operation.inc
index 09f929d088588f13da9e7ae1c87ce3e487bb5ef9..d0e382665eadccda1ef517737d7eb4430aed11ce 100644 (file)
--- a/doc/aprs-operation.inc
+++ b/doc/aprs-operation.inc
@@ -1,12 +1,19 @@
        === APRS
 
                {aprsdevices} can send APRS if desired, and the
-               interval between APRS packets can be configured. As each APRS
-               packet takes a full second to transmit, we recommend an
-               interval of at least 5 seconds to avoid consuming too much
-               battery power or radio channel bandwidth. You can configure
-               the APRS interval using {application}; that process is described in
-               <<{configure_section}>>.
+               interval between APRS packets can be configured. As
+               each APRS packet takes a full second to transmit, we
+               recommend an interval of at least 5 seconds to avoid
+               consuming too much battery power or radio channel
+               bandwidth. You can configure the time within each
+               minute that APRS transmits by changing the APRS offset
+               value. When the GPS signal is locked and knows the
+               current time, the APRS offset selects the time with
+               each minute for the first APRS transmission;
+               subsequent transmissions occur each APRS interval
+               seconds thereafter.  You can configure the APRS
+               interval and APRS offset using {application}; that
+               process is described in <<{configure_section}>>.
 
                AltOS supports both compressed and uncompressed APRS
                position report data formats. The compressed format