Make sure 'radio link' doesn't refer to telemetry and eliminate use of
'RF link' and other similar but not identical phrases.
Signed-off-by: Keith Packard <keithp@keithp.com>
</para>
<para>
In flight or "pad" mode, the altimeter engages the flight
</para>
<para>
In flight or "pad" mode, the altimeter engages the flight
- state machine, goes into transmit-only mode on the RF link
- sending telemetry, and waits for launch to be detected.
+ state machine, goes into transmit-only mode to
+ send telemetry, and waits for launch to be detected.
Flight mode is indicated by an "di-dah-dah-dit" ("P" for pad)
on the beeper or lights, followed by beeps or flashes
indicating the state of the pyrotechnic igniter continuity.
Flight mode is indicated by an "di-dah-dah-dit" ("P" for pad)
on the beeper or lights, followed by beeps or flashes
indicating the state of the pyrotechnic igniter continuity.
If idle mode is entered, you will hear an audible "di-dit" or see
two short flashes ("I" for idle), and the flight state machine is
disengaged, thus no ejection charges will fire. The altimeters also
If idle mode is entered, you will hear an audible "di-dit" or see
two short flashes ("I" for idle), and the flight state machine is
disengaged, thus no ejection charges will fire. The altimeters also
- listen on the RF link when in idle mode for requests sent via
+ listen for the radio link when in idle mode for requests sent via
TeleDongle. Commands can be issued to a TeleMetrum in idle mode
over either
TeleDongle. Commands can be issued to a TeleMetrum in idle mode
over either
- USB or the RF link equivalently. TeleMini only has the RF link.
+ USB or the radio link equivalently. TeleMini only has the radio link.
Idle mode is useful for configuring the altimeter, for extracting data
from the on-board storage chip after flight, and for ground testing
pyro charges.
Idle mode is useful for configuring the altimeter, for extracting data
from the on-board storage chip after flight, and for ground testing
pyro charges.
very large air-frames, is that you can power the board up while the
rocket is horizontal, such that it comes up in idle mode. Then you can
raise the air-frame to launch position, and issue a 'reset' command
very large air-frames, is that you can power the board up while the
rocket is horizontal, such that it comes up in idle mode. Then you can
raise the air-frame to launch position, and issue a 'reset' command
- via TeleDongle over the RF link to cause the altimeter to reboot and
+ via TeleDongle over the radio link to cause the altimeter to reboot and
come up in flight mode. This is much safer than standing on the top
step of a rickety step-ladder or hanging off the side of a launch
tower with a screw-driver trying to turn on your avionics before
come up in flight mode. This is much safer than standing on the top
step of a rickety step-ladder or hanging off the side of a launch
tower with a screw-driver trying to turn on your avionics before
<para>
An important aspect of preparing a rocket using electronic deployment
for flight is ground testing the recovery system. Thanks
<para>
An important aspect of preparing a rocket using electronic deployment
for flight is ground testing the recovery system. Thanks
- to the bi-directional RF link central to the Altus Metrum system,
+ to the bi-directional radio link central to the Altus Metrum system,
this can be accomplished in a TeleMetrum or TeleMini equipped rocket
with less work than you may be accustomed to with other systems. It
can even be fun!
this can be accomplished in a TeleMetrum or TeleMini equipped rocket
with less work than you may be accustomed to with other systems. It
can even be fun!
- By design, the altimeter firmware listens for an RF connection when
+ By design, the altimeter firmware listens for the radio link when
it's in "idle mode", which
it's in "idle mode", which
- allows us to use the RF link to configure the rocket, do things like
+ allows us to use the radio link to configure the rocket, do things like
ejection tests, and extract data after a flight without having to
crack open the air-frame. However, when the board is in "flight
mode", the altimeter only
transmits and doesn't listen at all. That's because we want to put
ultimate priority on event detection and getting telemetry out of
ejection tests, and extract data after a flight without having to
crack open the air-frame. However, when the board is in "flight
mode", the altimeter only
transmits and doesn't listen at all. That's because we want to put
ultimate priority on event detection and getting telemetry out of
- the rocket and out over
- the RF link in case the rocket crashes and we aren't able to extract
+ the rocket through
+ the radio in case the rocket crashes and we aren't able to extract
data later...
</para>
<para>
data later...
</para>
<para>
simple. Even on our baro-only TeleMini board, the use of a Kalman
filter means there is no need to set a "mach delay". The few
configurable parameters can all be set using AltosUI over USB or
simple. Even on our baro-only TeleMini board, the use of a Kalman
filter means there is no need to set a "mach delay". The few
configurable parameters can all be set using AltosUI over USB or
- or RF link via TeleDongle.
+ or radio link via TeleDongle.
</para>
<section>
<title>Radio Frequencies</title>
</para>
<section>
<title>Radio Frequencies</title>
<para>
In the unlikely event an accel cal that goes badly, it is possible
that TeleMetrum may always come up in 'pad mode' and as such not be
<para>
In the unlikely event an accel cal that goes badly, it is possible
that TeleMetrum may always come up in 'pad mode' and as such not be
- listening to either the USB or radio interfaces. If that happens,
+ listening to either the USB or radio link. If that happens,
there is a special hook in the firmware to force the board back
in to 'idle mode' so you can re-do the cal. To use this hook, you
just need to ground the SPI clock pin at power-on. This pin is
there is a special hook in the firmware to force the board back
in to 'idle mode' so you can re-do the cal. To use this hook, you
just need to ground the SPI clock pin at power-on. This pin is
</listitem>
<listitem>
Confirm that the TeleMini board seems to have updated OK, which you
</listitem>
<listitem>
Confirm that the TeleMini board seems to have updated OK, which you
- can do by configuring it over the RF link through the TeleDongle, or
+ can do by configuring it over the radio link through the TeleDongle, or
letting it come up in "flight" mode and listening for telemetry.
</listitem>
<listitem>
letting it come up in "flight" mode and listening for telemetry.
</listitem>
<listitem>
for Linux which can perform most of the same tasks.
</para>
<para>
for Linux which can perform most of the same tasks.
</para>
<para>
- After the flight, you can use the RF link to extract the more detailed data
+ After the flight, you can use the radio link to extract the more detailed data
logged in either TeleMetrum or TeleMini devices, or you can use a mini USB cable to plug into the
TeleMetrum board directly. Pulling out the data without having to open up
the rocket is pretty cool! A USB cable is also how you charge the Li-Po
logged in either TeleMetrum or TeleMini devices, or you can use a mini USB cable to plug into the
TeleMetrum board directly. Pulling out the data without having to open up
the rocket is pretty cool! A USB cable is also how you charge the Li-Po
<title>Data Analysis</title>
<para>
Our software makes it easy to log the data from each flight, both the
<title>Data Analysis</title>
<para>
Our software makes it easy to log the data from each flight, both the
- telemetry received over the RF link during the flight itself, and the more
+ telemetry received during the flight itself, and the more
complete data log recorded in the flash memory on the altimeter
board. Once this data is on your computer, our post-flight tools make it
easy to quickly get to the numbers everyone wants, like apogee altitude,
complete data log recorded in the flash memory on the altimeter
board. Once this data is on your computer, our post-flight tools make it
easy to quickly get to the numbers everyone wants, like apogee altitude,
but is easily changed using the menus in AltosUI. The files that
are written end in '.telem'. The after-flight
data-dumped files will end in .eeprom and represent continuous data
but is easily changed using the menus in AltosUI. The files that
are written end in '.telem'. The after-flight
data-dumped files will end in .eeprom and represent continuous data
- unlike the RF-linked .telem files that are subject to losses
+ unlike the .telem files that are subject to losses
along the RF data path.
See the above instructions on what and how to save the eeprom stored
data after physically retrieving your altimeter. Make sure to save
along the RF data path.
See the above instructions on what and how to save the eeprom stored
data after physically retrieving your altimeter. Make sure to save
</para>
<para>
A fun thing to do at the launch site and something you can do while
</para>
<para>
A fun thing to do at the launch site and something you can do while
- learning how to use these units is to play with the RF-link access
+ learning how to use these units is to play with the radio link access
between an altimeter and the TeleDongle. Be aware that you *must* create
some physical separation between the devices, otherwise the link will
not function due to signal overload in the receivers in each device.
between an altimeter and the TeleDongle. Be aware that you *must* create
some physical separation between the devices, otherwise the link will
not function due to signal overload in the receivers in each device.
</para>
<para>
You can access an altimeter in idle mode from the TeleDongle's USB
</para>
<para>
You can access an altimeter in idle mode from the TeleDongle's USB
- connection using the RF link
+ connection using the radio link
by issuing a 'p' command to the TeleDongle. Practice connecting and
disconnecting ('~~' while using 'cu') from the altimeter. If
you cannot escape out of the "p" command, (by using a '~~' when in
CU) then it is likely that your kernel has issues. Try a newer version.
</para>
<para>
by issuing a 'p' command to the TeleDongle. Practice connecting and
disconnecting ('~~' while using 'cu') from the altimeter. If
you cannot escape out of the "p" command, (by using a '~~' when in
CU) then it is likely that your kernel has issues. Try a newer version.
</para>
<para>
- Using this RF link allows you to configure the altimeter, test
+ Using this radio link allows you to configure the altimeter, test
fire e-matches and igniters from the flight line, check pyro-match
continuity and so forth. You can leave the unit turned on while it
is in 'idle mode' and then place the
fire e-matches and igniters from the flight line, check pyro-match
continuity and so forth. You can leave the unit turned on while it
is in 'idle mode' and then place the
projects / fw / altos / commitdiff