Marshall Scout UHF Transmitter Instructions
- June 8, 2024
- Marshall
Table of Contents
UHF Transmitter
Instructions Manual
Introduction
Congratulations on your purchase! The Marshall Scout UHF transmitter combines good tracking range and excellent reliability, all at an affordable price. The Scout is a great choice for tracking and recovering hawks, packing an economical and large capacity battery into a rugged machined aluminum case.:
- Frequency Stabile
- Short and Safe™ Antenna
- Magnetic Tap On /Tap Off™
- Apollo 13 Mode™ battery saving technology.
- Low Battery Sensor
- Long Battery Life
- Leg/Tail Re-confgigurable
- Machined Aircraft Aluminum Housing
- High Impact Crystal
- Highest Reliability possible
- Rugged, Hard-Coat Anodizing
Transmitter Specifications:
Operating Temperature: -40 F to +150 F (with new battery)
Weight: 9 grams (leg), 9.5 grams (w/ tail spring)
VHF Version
Standard Operation: 40ms pulse, 40ppm
Apollo 13 Operation: 20ms pulse, 27ppm
Range: 40 miles, Line of Sight
Battery Life: 30 days, continuous| UHF Version
Standard Operation: 30ms pulse, 90ppm
Apollo 13 Operation: 20ms pulse, 27ppm
Range: 70 miles, Line of Sight
Battery Life: 10 days, continuous
Battery
The Scout uses the readily available CR2032 Lithium 3 volt Battery. proven by
falconers for years. We recommend the Renata CR2032.
Battery is installed negative side down into the transmitter. You should be
able to read the text “CR2032” & “+” on the top side of the battery after
installation. Always install the battery at an angle towards the tab spring
inside the transmitter. Never install battery straight down, as this can
damage the battery springs. As soon as the battery is installed transmitter
will begin running. Install Lid securely “finger tight”. No need for tools or
tape.
Note: To easily remove the battery, gently tap the transmitter upside
down.
Important: When installing the lid be sure to tighten it securely (as
tight as possible using your fingers). A pair of pliers can also be used if
you need a little more torque. An insufficiently tightened lid may come loose.
Important: When changing the battery of a Scout, please remove the
battery for a period of 1-2 minutes before installing a new battery. The Scout
“remembers” its state from the last time the battery was removed and leaving
the battery out for this period will clear the memory. Alternately, switching
the Scout on with the magnet prior to removing the old battery will also clear
the memory.
Battery Life
The Scout will warn you when there are approximately 3-5 days remaining on the
battery with a “double beep” every 10 pulses. The transmitter keeps track of
cumulative transmission time to estimate remaining battery life. As a backup
system it also measures battery voltage in real time, which will warn you
should you accidentally put in an old battery.
Tap On /Tap Off™ Switch
If so equipped, the Scout uses the unique Marshall Tap On/Tap Off™ magnetic
switch to turn the transmitter on and off. You can leave it on bird while not
in use, removing only to change battery. To turn the Scout off, touch magnet
to battery lid until you hear 5 rapid beeps on your receiver as confirmation.
Repeat process to turn back on, confirmed by 3 rapid beeps. If you lose your
magnet, the Scout can be turned on and off by removing / installing the
battery. Always double check for transmitter signal by tuning in on receiver
before flight.
Turning Off:
Hold magnet to base of transmitter until you hear 5 beeps.
Note: Due to the ultra-low drain of the Scout circuit, there is no need
to worry about leaving a battery in the transmitter after turning it off with
the magnet – a new battery will be fine after two years in transmitter.
Apollo 13 Mode™: If the transmitter has been going for 12 hours, the
transmitter figures your bird is probably lost and does what NASA would do in
the same situation, conserving battery life with shorter and less frequent
pulses. If your bird was lost with a new battery, Apollo 13 Mode would come on
after 12 hours giving you a total of 10 days (30 days for VHF model) to look
for your lost bird. If you lost the bird just before the double beep came on,
it would last another 3 days.
Maintenance
The Scout is completely waterproof and can be washed with hot water. Make sure
insides of case and lid are dry before installing battery. Inspect antenna and
replace as soon as you see cracks or any exposed metal wire. For tail mounts,
always inspect the condition of the tail spring. Replace if any cracks or
weaknesses appear on spring. For leg mounts, inspect the Bewit slot for any
signs of wear or thinning.
Replacing the Antenna
The short antenna on Scout is field replaceable. Use only Marshall replacement
antennas with Power Line Static ProtectionTM . Your Marshall replacement
antenna will come with instructions on replacing the antenna.
Scout Range
The Scout UHF is designed to give best range while on your bird. It has been
tested to over 40 miles line-of-sight. Like any transmitter, range varies
greatly with terrain. Tests have shown its range in hunting situations of
western US deserts to be anywhere from 3 to 40 miles, depending on height of
transmitter, height of receiver, type of terrain and obstructions, and radio
noise or interference.
Using the Receiver
Signal from Scout is strongest if receiver antenna is lined up in same
orientation as Scout antenna. Since a falcon on a perch keeps tail almost
vertical, you will get best signal if holding receiver antenna with its
elements vertical. However, there are cases when transmitter’s antenna could
be nearly horizontal and holding your receiver antenna horizontally will give
the better result. 
Hint: If both horizontal and vertical signals can be
heard, use horizontal for better pinpoint accuracy.
Customized Transmitter
If your needs change in the future, the frequency (channel) of the Scout can
be changed electronically without opening it up. A UHF Scout can be set
anywhere from 432.000 to 436.995, VHF Scout: 216.000-219.995 Also, the pulse
width and pulse rate can be adjusted to give either better battery life or
more, longer, easier-to-track pulses. Send transmitter to Marshall Radio to
custom re-configure it. One business day turn-around guaranteed.
Warranty
Marshall Radio Telemetry warrants that the Scout will be free from defects
of workmanship and materials for One (1) Year from the date of purchase by
end-user. Return defective transmitter directly to Marshall Radio Telemetry
and we will repair or replace it and return it free of charge. However, we
will not be responsible for damage from misuse or normal wear and tear
incurred during use. Warranty is void if a non-Marshall Radio Telemetry
antenna has been used. Under no circumstances will Marshall Radio be
responsible for damages or loss beyond the value of the transmitter itself,
including but not limited to the loss of a bird or lost time.
FCC Notice: This device does not interfere with TV reception or Federal
Government radar.
MARSHALL RADIO TELEMETRY 845 W. Center St., North Salt Lake, UT 84054, USA
Toll Free 800-729-7123 International
1-801-936-9000
www.marshallradio.com
© 2022 Marshall Radio Telemetry, Inc.
Rev. Apr 2022 https://marshallradio.com/ww/46601-2/
US LICENSING
REGULATIONS
References
- Marshall Radio – THE MOST CAREFULLY ENGINEERED AND RELIABLE TRACKING SYSTEM AVAILABLE.
- Marshall Radio – THE MOST CAREFULLY ENGINEERED AND RELIABLE TRACKING SYSTEM AVAILABLE.
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