---
name: "ao-cal-freq"
section: "1"
platform: "linux"
package: "altos"
version: "1.9.21-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/ao-cal-freq"
---

# ao-cal-freq(1)

Calibrate AltOS flight computer frequency

## NAME

ao-cal-freq - Calibrate AltOS flight computer frequency

## SYNOPSIS

**ao-cal-freq** \[-T *tty-device*\] \[--tty *tty-device*\] \[-D *altos-device*\] \[--device *altos-device*\] \[-v\] \[--verbose\] \[-n\] \[--nosave\] \[-o *cal-value-output-file*\] \[--output *cal-value-output-file*\]

## DESCRIPTION

*ao-cal-freq* drives the frequency calibration process and saves the result.

## OPTIONS

- \-T tty-device \| --tty tty-device

  This selects which tty device the debugger uses to communicate with the target device. The special name 'BITBANG' directs ao-dbg to use the cp2103 connection, otherwise this should be a usb serial port connected to a suitable cc1111 debug node.

- \-D AltOS-device \| --device AltOS-device

  Search for a connected device. This requires an argument of one of the following forms:

-

  TeleMega:2\
   TeleMega\
   2

-

  Leaving out the product name will cause the tool to select a suitable product, leaving out the serial number will cause the tool to match one of the available devices.

- \-o cal-value-output-file \| --output cal-value-output-file

  Writes the resulting calibration value to the specified file.

- \-n \| --nosave

  Inhibits saving the calibration value on the device. Necessary for devices which don't have on-board configuration storage.

- \-v \| --verbose

  Makes *ao-cal-freq* chatty about communication with the target device.

## USAGE

*ao-cal-freq* opens the target device, interactively calibrates the frequency, then shows the resulting calibration values and (optionally) saves them to configuration memory and/or a file.

## AUTHOR

Keith Packard