© 2022 Marshall Radio Telemetry, Inc.
Rev. July 2022
RT / RT XP User Guide
Introduction
Congratulations on your purchase of the Marshall RT Standard Transmitter. Designed for the harshest conditions in falconry, the RT
is the most rugged falconry transmitter ever produced. Now even more powerful, the RT is longest range transmitter available.
Operating Modes:
The RT transmitter is designed give the best range possible while hunting, but it is also
able to reduce duty cycle (slow down the pulses) to preserve battery life if your falcon is
out for an extended time. With this feature, the RT provides 7+ days of total battery life
on a new battery.
Battery Life Indication:
The RT will run 7 days continuously when a new battery is installed. The LED light on the
side of the RT indicates the current battery status
….
Green LED
– Normal Mode. Battery condition is good
.… Yellow LED
(and double beep) – Change Battery. The battery is getting low (2-3
days remaining)
….
Red LED
(and triple beep) – Battery almost dead, you have less than 1 day remaining
Note: the LED light is the latest technology and is super-efficient, it uses less than 1% of the transmitter’s power.
Tap On /Tap Off™ Magnetic Switch
The RT uses Marshall’s unique rapid tap on/ tap off magnetic switch to turn the transmitter on and off.
The status of the transmitter is then indicated by the color of the LED light.
Note: If you lose your magnet, or prefer to use your transmitter without this feature, the RT can be
switched on and off by simply removing the battery.
Battery:
The RT uses the venerable 1/3N Lithium Photo Battery proven by
falconers for years. We recommend the Duracell DL1/3N.
Battery is installed positive side inside the lid (positive side is marked with a “+”).
When installing battery, screw the lid down finger tight. As soon as the battery is
installed transmitter will begin running.
Rechargeable Batteries:
The RT is also compatible with Marshall’s rechargeable (GPS) batteries. These improve range (more
output power) and provide enhanced performance in sub-freezing conditions. Rechargeable batteries also allow you to start each
flight with a fully charged battery, giving you maximum recovery time should the need arise. Charger Kit’s and additional batteries
are sold separately.
