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Signal Sensor

Close-up image of the New Signal Sensor Close-up image of the New Signal Sensor
The Signal Sensor is a compact, wide-band micro receiver designed to verify the operation of your Marshall Radio transmitters at very close range. Any frequency transmitter with a magnetic switch may be turned On and Off with the Signal Sensor’s internal magnet whilst simultaneously hearing the signal and seeing a flashing LED with each pulse for single-step, one-handed operation.

Features 

  • Housed in a durable weather-resistant case.
  • Internal magnet for turning transmitter ON and OFF.
  • Simple Push-button operation prevents battery drain when not in use.
  • Microprocessor-controlled signal detection algorithm.
  • LED & Tone indicators signal that transmitter is operational.
  • LED & Tone indicators signal that tester battery is functioning.
  • Lanyard attachment point to prevent loss in the field.

Design

Product Description

LED_closeup_smThe Signal Sensor is a compact, wide-band micro receiver designed by Radio Expert Ron Kumetz to sense the operation of Marshall Radio Telemetry transmitters at very close range. Any transmitter with a magnetic switch may be turned on and off with the Signal Sensor’s internal magnet whilst simultaneously hearing the signal and confirming it with a flashing LED for single-step, one handed operation.

By pressing and holding the on switch, you'll hear and see two quick beeps followed by silence if no operating transmitter is near. But bring it to within two or three feet of a running transmitter and you'll hear it it running, see the LED blink with every pulse. Touch the device to a running transmitter as shown in this image, and you'll hear the five rapid beeps of the mag switch shutting down, followed by silence.

 

This handy little device is available from us in one color ("Marshall gray) and is very useful to turning off transmitters at the end of a flight. Transmitters should always be checked against the receiver when turning on before a flight to make sure everything is fully operational and the batteries and frequency tuning is perfect. 

 

 

Features

 

• Housed in a durable weather-resistant case.

• Internal magnet for turning transmitter ON and OFF.

• Simple Push-button operation prevents battery drain when not in use.

• Microprocessor-controlled signal detection algorithm.

• LED & Tone indicators signal that transmitter is operational.

• LED & Tone indicators signal that tester battery is functioning.

• Lanyard attachment point to prevent loss in the field.

 

 

Specifications:

Dimensions 2.24 x 1.34 x 0.4 in

56.8 x 34.7 x 10.2 mm

Weight 0.6 oz / 15g

Frequency 150 through 450 Mhz

No Tuning Required

Battery 1 x CR2032 Lithium Coin Cell

Operation

Operation

Backlit_LED_shot_smThe Signal Sensor is equipped with a strong, rare earth magnet for use in activating transmitters equipped with a magnetic on and off switch. The magnet is located at the front of the Signal Sensor opposite the lanyard attachment point (the half circle seen in this image through the case).

To turn the transmitter ON or OFF, simply hold the magnet end of the Signal Sensor directly above the area of the transmitter where the Hal Effect switch is located. To verify the transmitter’s operation, push and hold the button on the device. The Signal Sensor will first beep and flash its LED twice to verify that it is operational. It will then beep and flash in cadence with the transmitter.

To turn the transmitter OFF, repeat the above sequence. The Signal Sensor will stop beeping and flashing when the transmitter has been successfully deactivated.

Change the battery in a transmitter immediately if it is noticed that a magnet will not turn it off. This is an indication that the battery in the transmitter is low.

Note: If your transmitter does not have a magnetically operated on/off switch, it may be tested but cannot be activated or deactivated with the magnet in the Signal Sensor.

Battery Replacement

The Signal Sensor is powered by a single CR2032 lithium coin cell. To maximize battery life, there is no battery drain when the power button is not depressed. The battery can be changed easily by prying the Signal Sensor apart with a small flat-bladed screwdriver or similar implement that will fit in the seam around the edge of the unit. This is most easily accomplished on the end of the Signal Sensor with the lanyard attachment loop (see back cover photo).

Once the Signal Sensor is open, push the old battery out of the battery holder and insert a fresh cell. Care should be exercised to make sure that the positive (+) side of the battery is installed facing AWAY from the circuit board. To reassemble the Signal Sensor, line up the two case halves so the battery holder sits between the four protrusions which center it in the case. Push the two case halves together firmly until they “snap” closed.

 

Care of the Signal Sensor

The Signal Sensor should not require any maintenance other than occasional replacement of the battery. Its enclosure is weather resistant, but it is not waterproof.  Damage due to exposure to the elements while in normal use is unlikely, however, extended exposure or immersion may damage the unit. Should the unit be immersed, IMMEDIATELY open the Signal Sensor and remove the battery (see “Battery Replacement”). Allow the Signal Sensor to dry thoroughly before re-installing the battery and re-assembling the unit.

Warranty

This product is warranted for a period of one year from the date of purchase. If the product fails due to defects in workmanship or components it will be repaired or replaced at the discretion of the distributor.

Anything which is not the fault of the manufacturer is not covered by the warranty. This includes but is not limited to physical damage, immersion in any liquid, and forces of nature such as lightning. In other words, if you do something that modifies its original purpose such as running it over with your truck, letting your dog chew it, dropping it into a lake, or putting it through the washing machine, the warranty has been voided. The battery is NOT covered under warranty.

What do I do if my unit fails due to a reason covered by the warranty?

If your unit fails to operate properly and the failure was not as a result of a non-warranty cause, contact us directly. We may ask you to perform tests to determine what is wrong with the unit or may give you a return authorization.

The Signal Sensor should not require any maintenance other than occasional replacement of the battery. Its enclosure is weather resistant, but it is NOT waterproof.  Damage due to exposure to the elements while in normal use is unlikely, however, extended exposure or immersion may damage the unit. Should the unit be immersed, IMMEDIATELY open the Signal Sensor and remove the battery (following the instructions above). Allow the Signal Sensor to dry thoroughly before re-installing the battery and assembling the unit.

Questions

Can I use the Signal Sensor instead of a tracking receiver?

You can use the Signal Sensor to detect if a transmitter is runing, at very close range. But there's no direction finding cabability. The Signal Sensor was created to make the convenience of the magnetic switch on your Marshall Radio transmitters even more convenient, by not requiring you to open up, turn on your tracking receiver and tune in the signal just to listen for the transmitter when using the magnet to turn it off. With the Signal Sensor, it's all there in your hand (magnet, detection, sound) so the receiver can stay stowed in its holster in the truck after the flight.

How does this compare to other transmitter testers out there?

Old__New_side_by_side_sm

It's primary advantage is that it is much less bulky than the two box designs shown here. By comparison, it is micro sized and its extremely light weight gives you a very usable device to have in the field, either using the lanyard around your neck or connected to a hawking vest.

Also, the battery used is the extremely common and easy to find CR 2032 coin cell 3v lithium.

Last but not least, it's only one half to one third the cost of the bigger boxes!

 

 

 

 

Customers Say

Harry_smDuring the 2009 season, I used this transmitter tester. Using a magnet, it controls the on/off switch of Marshall Radio and other magnet-activated transmitters. I used it to test a Scout worn by a male goshawk and a male Harris’ while hawking quail. To report the action of the transmitter, a button on the Signal Sensor is pressed to reveal a light and a beep. The light is quite bright and can be seen in direct daylight. When the button is held down, the tester will indicate the transmitter is on by flashing and beeping in cadence with the transmitter. If the transmitter is off, the tester will not signal with the light or beep.

This small 15-gram device allows a falconer to check the status of a transmitter without turning on a receiver. Like so many electronic gadgets, it has a touch of personality all its own. If held at the correct angle it will pick up the signal from several feet away. If one stands near other hawks whose transmitters are on, the tester will pick up the signal from all the transmitters. It may be necessary to walk a few feet away from other functioning transmitters to test yours as the Signal Sensor works for all transmitters on all bands from 150 – 450 MHz.

We all pay the price of growing old and this small item played a trick on me the whole season. My hearing is not what one would brag about, and I could not hear the beep even with modern digital hearing aids. As the season rolled by, I demonstrated the Signal Sensor to a number of friends while we were hunting and never asked if they could hear the beep. At the end of the season, I requested a replacement because I assumed my finder was not beeping. When the shiny new one arrived, I found it silent also. Imagine my surprise when I took both to a friend who could hear the beep from both of them loud and clear! This made me appreciate the tester’s double feature of having both light and sound as indicators.

The tester operated with absolute reliability throughout the entire quail season and did not require battery replacement. It is weather resistant and continued to function in rainy weather. It comes with a lanyard and is easily attached to a clip. One can also attach it to a vest or falconry bag where it will be especially convenient, eliminating fiddling with the receiver.

I recommend the Signal Sensor without reservation.

Harry McElroy
www.deserthawking.com

 

Mike_smAfter using the Signal Sensor for just one season, I would be lost without it.  Not only for turning the transmitters on and off, but at the end of the day while checking to see that all my transmitters are off.  Flying three birds and running two dogs, I have a minimum of eight transmitters to check. I would otherwise have to be switching between bands, ( 216, 217, 218, 219, and 433, 434 ) as well as different frequencies,  ( 216.135  /  218.135  /  216.245  /  218.245  /  216.355  /  218.355  /  217.465  /  217.465  /  434.575  /  434.675 ).....   I have to tune in the receiver's frequency and band for each transmitter... OR...  I can just wave the Signal Sensor over all of them and I will know if anything is still on.

Michael Garcia

40.00£
Price with discount 40.00£
Sales price 40.00£
Sales price without tax 40.00£