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Updating the Transmitter Sofware Using Your Descent Dive Computer
Before you can update the software, you must pair your Descent T1 transmitter with a Descent Mk2i dive
computer.
1 Select an option to sync your dive computer:
• Sync your dive computer with the Garmin Dive app.
• Connect the dive computer to your computer using the USB cable, and sync with the Garmin Express
application.
Garmin Dive and Garmin Express automatically look for software updates. When you sync with Garmin
Express, the update is applied immediately to your dive computer. When you sync with Garmin Dive, you will
be prompted to apply the update at a later time.
2 Install the transmitter on the first-stage regulator (Installing the Transmitter on Your Tank Regulator, page 13).
3 Gradually open the tank valve to pressurize the first-stage regulator.
When the transmitter detects pressure, it wakes from low power mode and plays a tone.
4 On the paired Descent dive computer, hold MENU, select Dive Setup > Air Integration > Transmitters, and
select your transmitter.
5 Wait for the transmitter to connect to your dive computer.
Connected appears on the dive computer screen.
6 Select Software Update.
NOTE: This option may take up to a minute to appear while the dive computer determines the transmitter's
software version and battery status.
7 Verify the transmitter ID when prompted.
The transmitter ID is printed on the housing.
8 Keep the dive computer near the transmitter until the software update is complete.
My transmitter and watch lose connection underwater
If your watch and transmitter communicate on the surface but lose communication underwater, you can try
these tips.
• Increase the transmitter power setting (Adjusting the Transmitter Power Setting, page 144).
• Install the transmitter on a high pressure hose extension to improve the line of sight between the transmitter
and the watch (Installing the Transmitter on a High Pressure Hose Extension, page 15).
• Follow the transmitter position tips to achieve the best line of sight between the watch and the transmitter
(Transmitter Position Tips, page 11).
Adjusting the Transmitter Power Setting
NOTE: Increasing the power setting increases the audible noise from the transmitter and decreases its battery
life.
1 Hold MENU.
2 Select Dive Setup > Air Integration > Transmitters.
3 Select a paired transmitter.
4 Select Set Transmit Power.
5 Enter the transmitter ID.
NOTE: The transmitter ID is printed on the housing.
6 Select an option.
My transmitter battery is draining rapidly
If your transmitter battery is draining faster than the expected battery life (Descent T1 Specifications, page 138),
you should make sure the transmitter is returning to low power mode after a dive.
When you return to the surface after a dive, depressurize your regulator.
The installed transmitter enters low power mode after two minutes have elapsed.
144 Troubleshooting
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