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Summary of Contents for Marshall Amplification Field Marshall 100
- Page 1 Ow ner’s Manual OWNER’S GUIDE Page 1...
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Page 2: Table Of Contents
Field Marshall Tracking Receiver Contents: Introduction................ 3 Getting Started..............4 Receiver Controls ............6-11 In the Field—A Quick Tutorial ........12 Frequently Asked Questions ........16 Ad vanced Telemetry ............23 Radio Propagation............28 Tracking Strategies ............34 Warranty ................40 Page 2... -
Page 3: Introduction
Ow ner’s Manual Introduction Congratulations on y our purchase of the all new digital Field Marshall receiv er. It combines superior range and conv enience in a compact and rugged design. The Field Marshall is great for tracking Marshall Transmitters under any condi- tions (see page 37). - Page 4 Field Marshall Tracking Receiver Introduction, cont. “The Quiet One” comes through with a more effective and pleasant tracking experience. The Quiet One ™ When you turn on your Digital Field Marshall, you’ll notice the quietness immediately. You usually won’t turn it up as loud as your old receiver because you don’t have to.
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Page 5: Getting Started
Ow ner’s Manual Getting Started The f irst thing to understand is how to deploy the collapsible y agi antenna, which is a full-size three element Y agi Antenna for maxi mu m range and pin-point accuracy, using Marshall’s patented design. Remove the receiver from whatever carry ing case you are using (hunting bag, holster or... - Page 6 Field Marshall Tracking Receiver pull the slide bar forward Reach f orward and to f ully extend the forward elements until it clicks into place. Finally, pull the director elements out forward until they click at their ex- tended position. The yagi is now fully extended and ready for use. The antenna won’t give its best range and pin-point accuracy unless fully deployed as shown in the picture above.
- Page 7 Ow ner’s Manual Turning It On The receiver is turned on by rotating the Volume Knob on the front panel. It turns off again by turning to the left with a final click. Tuning The frequency is selected with the three numbered switches (two switches in the case of the FM100.) They indicate the kilohertz (KHz) of...
- Page 8 Field Marshall Tracking Receiver Range Switch is prov ided to be able to estimate the distance to the trans- mitter, a process called ranging. When y ou are driving in y our v ehicle toward the transmitter f rom a distance, the key question often is, “when should I get out and start walking?”...
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Page 9: Other Features
Ow ner’s Manual Other Features . . . Batteries The digital Field Marshall uses six AAA 1.5 Volt batteries. Y ou can use any name brand Alkaline batteries, although more expensiv e Lithium batteries can be used f or longer life. (Older style Zinc-Carbon batteries are not recommended.) AAA The Low battery Light will begin to Lithium 1.5V batteries work better in cold... -
Page 10: External Power
Field Marshall Tracking Receiver External Power The External Power Jack is available for use with a standard 12 volt automotive cigarette lighter adapter with a negative ground. You can also use DC voltage from any external source between 7.5 and 14 volts that can supply up to 200 Batteries in the receiver cannot be recharged through the External Power Jack. - Page 11 Ow ner’s Manual Headphones give a big advantage when tracking weak signals in noisy environments and are strongly recommended for serious tracking and listening to very weak signals. Page 11...
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Page 12: In The Field-A Quick Tutorial
Field Marshall Tracking Receiver In The Field – A Quick Tutorial Basic Tracking The best way to become familiar with your receiver is to use it outside. Turn on a transmitter and place it about 100 yards away. Set the Range Switch to medium. Adjust the Tuning Knob until you hear a clear beeping tone from the transmitter. - Page 13 Ow ner’s Manual Vertical vs. Horizontal Now, point the receiver at the transmitter again and rotate the antenna until the elements are vertical. Did the strength of the signal change? Or was it strongest somewhere in-between? In most cases, one orientation will be stronger than any other. This is important: Make it a habit to rotate the receiver from horizontal to vertical every time you use it at a new location.
- Page 14 Field Marshall Tracking Receiver In the Field When you’re ready to use the system in the field, tune in the signal just before letting your bird or dog go. That ensures you’ll be ready with the best signal instead of having to try to locate it in the rush of the moment when the animal first becomes lost.
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Page 16: Frequently Asked Questions
Field Marshall Tracking Receiver Frequently Asked Questions Why does m y receiver pick up all m y transm itters at the same time? They’re on different channels. Extremely strong signals will get through even the most power- ful filters in a receiver. If you have transmitters on adjacent channels transmitting right around you, you might hear a pop- ping or thumping sound from them. - Page 17 Ow ner’s Manual To avoid this, set your receiver on Near when you tune up – this removes all but the real, genuine signal you want to tune to. And stand a short distance away when you tune up. What is the single most important thing to do if I ab- solutely don’t want to lose m y anim al? Put a backup transmitter on the animal.
- Page 18 Field Marshall Tracking Receiver Why is the Range Sw itch necessary? My other re- ceiver didn’t have one. The Range Switch is a feature that allows you to get a rough idea of the distance to the transmitter. If the signal is very strong and you don’t switch down to Me- dium or Near, the receiver will not point out the right direction very precisely.
- Page 19 Ow ner’s Manual Distance Technique #1: Let’s assume you are receiv- ing a strong signal with the Range Switch on Far. Now flip the switch from Far to Medium. If the signal remains strong, it means you are fairly close to the transmitter. With a strong signal, here are typical ranges to a trans- mitter near the ground: Near ......Less than 200 feet...
- Page 20 Field Marshall Tracking Receiver What is a KHz and a MHz? These are measurements of frequency. Every transmitter has a unique frequency that makes it distinguishable from all others. Fortunately, a receiver can tune into a single frequency at a time and reject all the others.
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Page 23: Advanced Telemetry
Ow ner’s Manual Advanced Telemetry The Field Marshall Receiver is easy to use successfully for almost all occasions. But there are those times when you will stretch it to its limits. It will be worth your time to read this section and learn a few more techniques. - Page 24 Field Marshall Tracking Receiver Polarization Radio waves are electromagnetic, exactly the same as light. When your animal is lost you’re literally seeing it, with different eyes. The miracle is that the transmitters used in telemetry emit such small power, a few thousandths of a watt. Picking up that tiny signal is equivalent to seeing a dim, blinking flashlight miles away in daylight.
- Page 25 Ow ner’s Manual Hint: Absence of polarization can be a clue. Suppose you’re in a canyon and get a strong reading from a canyon wall. Either your transmitter’s up there, or it’s a reflection off the canyon wall from somewhere else. Before climbing, check the polarity of the signal.
- Page 26 Field Marshall Tracking Receiver Rule #2: Whenever you take a new bearing with your yagi, scan the entire horizon first, all 360 degrees. Otherwise you could find yourself following the back lobe, going exactly the opposite direction from your animal. The Field Marshall antenna provides the best combination of gain and sharp pattern possible in a 3 element yagi.
- Page 27 Ow ner’s Manual Hint: If the signal starts getting weak you know to stop and take a bearing with your yagi. At least then you’ll know what point of the horizon your animal just disappeared behind, a vital piece of information. The omni-directional antenna is also useful when you lose the signal altogether.
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Page 28: Radio Propagation
Field Marshall Tracking Receiver Radio Wave Propagation Radio waves normally travel in straight lines, but like light, they can also play tricks. Unless you do your hunting on an utterly flat, dry, treeless plain, you will experience all of the deceptions below: Reflections Radio waves reflect under many conditions and the result is always an illusion. - Page 29 Ow ner’s Manual Fences & Wires A fence picks up your transmitter’s signal, like an antenna, and the signal races down the wire and re-radiates. Your receiver picks up false signals which will most likely be horizontally polarized. The effect is most pronounced when your target is right next to the wire.
- Page 30 Field Marshall Tracking Receiver Terrain Absorption As radio waves pass through objects they diminish in strength. The effect is most noticeable in wooded areas where vegetation saps the strength of your signal. The further it goes through a forest the greater the loss.
- Page 31 Ow ner’s Manual The key to getting the best range from your receiver is altitude. High spots are least likely to be in a shadow. If you’re not getting a good signal, the first thing to do is get higher. Driving to the top of a hill or climbing a water tower can dramatically increase your transmitter’s range.
- Page 32 Field Marshall Tracking Receiver Diffraction Fortunately, radio waves can bend around objects. Diffraction works best around metal edges in buildings, but also happens with hills, trees and mountains. Diffraction increases the range of your transmitter beyond line-of-sight, because the signal bends over the crest of the hills.
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Page 33: Tracking Strategies
Ow ner’s Manual Tracking Strategies The Marshall receivers and transmitters are the finest available to telemetry users. While good equipment helps, good technique is equally important when your animal is really lost. Most of the time you’ll find it absolutely no problem, but there are those times when you’ll want every advantage possible. - Page 34 Field Marshall Tracking Receiver ° Each time you take a bearing always scan a full 360 radius first to find the peak response. Remember that every yagi has a certain ° response 180 from the peak and if you’re not careful you could go in exactly the wrong direction.
- Page 35 Ow ner’s Manual the exact location of the transmitter: at the intersection of the two lines. You probably can’t follow the line to the transmitter directly anyway because of roads and obstacles or the need to stay on high ground, so take advantage of that fact. For triangulation to work, you have to remember the line of the previous bearing.
- Page 36 Field Marshall Tracking Receiver The ultimate way to get up high is to hire an airplane and circle the area, using a yagi antenna mounted on the wing struts, pointing at an angle downward. Be sure to use good head- phones in a plane.
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Page 39: Warranty
Ow ner’s Manual Warranty Marshall Radio T elemetry warrants that its receivers will be free from defects of workmanship and materials for T HREE YEARS from date of purchase. If your receiver is defective return it to your distributor 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 damage incurred during use. - Page 40 Field Marshall Tracking Receiver (800) 729-7123 (801) 936-9000 Page 40 www.marshallradio.com...