doc: Document APRS offset configuration value

Update screen shots including this as well.

Signed-off-by: Keith Packard <keithp@keithp.com>

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

diff --git a/doc/config-device.inc b/doc/config-device.inc
index 5e3bdbf0b561b79bbbd704afbde1c47ab50566d4..2e3d47d42dce092fe4ea9cbacb0731a60311ae99 100644 (file)
--- a/doc/config-device.inc
+++ b/doc/config-device.inc
@@ -118,6 +118,16 @@ ifdef::radio[]
                altitude with Compressed format. Test before
                you fly to see which to use.
 
+       ==== APRS Offset
+       
+               The delay from the top of the minute before sending
+               the first APRS packet of the minute. Coordinating
+               values for this parameter between multiple devices can
+               allow a single receiver to reliably receive APRS
+               packets from multiple devices. Note that this offset only
+               takes effect while the GPS signal is locked so that the
+               transmitting device knows the current time.
+               
        ==== Callsign
 
                This sets the call sign included in each

diff --git a/doc/configure-altimeter.png b/doc/configure-altimeter.png
index 09a83d16fa725574bc53dd9824939a5976ceb249..73c3dc33fc06ef6493220b6b7628b83c8de89c4a 100644 (file)
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diff --git a/doc/telegps-configure.png b/doc/telegps-configure.png
index 56cb20311b00e63250d5085aa2d12f1381913766..4bc052f3589e4fdf474a0d09560e963aba8e6592 100644 (file)
Binary files a/doc/telegps-configure.png and b/doc/telegps-configure.png differ