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Topic: Product detector

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	Product detector - Wikipedia, the free encyclopedia
		A product detector is a type of demodulator used for AM and SSB signals.
		A product detector which accepts an IF signal would be used as a demodulator block in a superheterodyne receiver, and a detector designed for RF can be combined with an RF amplifier and a low-pass filter into a direct-conversion receiver.
		The simplest form of product detector multiplies an incoming signal by its carrier to produce a copy of the original message and another AM signal at twice the original carrier frequency.
	en.wikipedia.org /wiki/Product_detector (482 words)

	United States Patent: 5,052,401
		The product detector includes filters which isolate the patient's evoked potentials, a modulator which detects the response using the stimulus source frequency and a demodulator that determines the amplitude of the response.
		The product detector 58 essentially provides amplitude demodulation of the 6 Hz evoked potential signal which is amplitude modulated by varying the focus of the test lense using the frequency (6 Hz) of the stimulus source as a locking frequency for performing the demodulation.
		The reference product detector would provide a baseline for brain wave activity from which the evoked potential signals at 6 Hz can be measured When the reference detector is used, the outputs of the 6 Hz detector and the reference detector would be combined using a differencing amplifier to produce an absolute evoked potential signal.
	www.mindcontrolforums.com /p/usp5,052,401.htm (8624 words)

	Universal Service Product Detector Installation Instructions
		Hold the Product Detector dial scale in position over the two mounting holes in the front panel and carefully mark the panel at the center of the 1/4" diameter hold of the dial scale.
		Insert the Product Detector into the FM adaptor socket in the receiver, secure it in place with two screws and washers (furnished) through the slits in the back cover of receiver.
		However, the Detector under these conditions has a small but tolerable amount of intermodulation distortion due to the fact that the 6AL5 AVC rectifier is connected across the RF input to the Product Detector.
	www.militaryradio.com /uspd.html (1117 words)

	Envelope detector - Wikipedia, the free encyclopedia
		An envelope detector is a device which is used to demodulate AM signals.
		To construct a diode detector, simply connect a diode between the input and output of a circuit, and connect a resistor and capacitor in parallel from the output of the circuit to the ground.
		The input to the detector must be band-pass filtered around the desired signal, or else the detector will simultaneously demodulate several signals.
	en.wikipedia.org /wiki/Envelope_detector (318 words)

	CW radar system - Patent 4005420
		The output of the detector, generally a product detector, is passed through a filter, the output of which is applied to a correlator.
		The output of the first detector is the product of the unmodulated radar signal and the echo signal which includes the Doppler shift and the repetitive digital code signal which in the preferred arrangement is a pseudo-random noise.
		The function of this detector is to multiply the signal arriving from antenna 20 with a sample of the signal derived from the power oscillator before modulation by the phase modulator 12.
	www.freepatentsonline.com /4005420.html (6126 words)

	Detector Product Overview (Site not responding. Last check: 2007-10-20)
		Detectors are designed for uncompromising safety and durability under the toughest conditions.
		Detectors are ruggedly constructed of 18-gauge welded steel (integral two-box) or heavy-gauge extruded aluminum (slimline three-box) to withstand the toughest treatment...even NEMA-4 hosedown of the optic heads.
		Detector's unique external blanking window which indicates beam is blanked, reducing potentially dangerous confusion.
	content.honeywell.com /sensing/datainstruments/detector/det_prod-overview.stm (365 words)

	Funster 40 meter Transceiver (Site not responding. Last check: 2007-10-20)
		This transceiver was built for the 40 meter band and this band probably represents the worst-case scenario for a single-ended product detector.
		I tried four different single-ended BJT product detectors while building this project and settled on the one shown as it had the most conversion gain and sounded the best to my ears.
		The sound was amplifyed by the product detector and then by the LM386 which is in the high gain mode.
	www.qrp.pops.net /funster.htm (3183 words)

	Metal Detector has multi-frequency capability., Safeline Metal Detection, Inc.
		Safeline's POWERPHASE metal detectors for the fresh cut produce industry can handle a wide range of products, from both foodservice and consumer sizes of bagged ready-to-eat salads and vegetables, to tubs of prepared fruit slices, to large polybags of chopped onions destined for ingredient use.
		Before the development of this technology, fresh cut and other produce processors who ran products with differing conductivity either required multiple metal detectors or set the frequency and/or sensitivity at sub-optimal levels to accommodate their most conductive products.
		QA personnel may program the detector to indicate how frequently manual testing is required and a signal is automatically given calling for a "Performance Check".
	news.thomasnet.com /fullstory/21186 (893 words)

	A Low-noise, High-performance Zero IF Quadrature Detector/Preamplifier
		The product detector's upper frequency limit is set by the ability of a field effect transistor (FET) to be turned on for only a quarter cycle of the incoming RF signal being converted to baseband.
		This is due primarily to the fact that the detector output is a rather large C to ground, which causes this most feedback sensitive point in the circuit to have a relatively low impedance, which decreased the likelihood of undesired feedback.
		A product detector was used to convert a RF signal to a four phase quadrature baseband signal to provide a signal source for the quadrature upconverter.
	rfdesign.com /mag/radio_lownoise_highperformance_zero/index.html (2479 words)

	Product detector -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-20)
		A product detector is a type of (Rectifier that extracts modulation from a radio carrier wave) demodulator used for (Modulation of the amplitude of the (radio) carrier wave) AM and (additional info and facts about SSB) SSB signals.
		Rather than converting the envelope of the signal into the decoded waveform like an (additional info and facts about envelope detector) envelope detector, the product detector takes the product of the modulated signal and a local oscillator, hence the name.
		Frequency of an AM carrier can accurately determined with a (additional info and facts about phase-locked loop) phase-locked loop, but for SSB, the only solution is to construct a highly stable oscillator.
	www.absoluteastronomy.com /encyclopedia/p/pr/product_detector.htm (408 words)

	Electroluminescent Receiver - Product Detector (Site not responding. Last check: 2007-10-20)
		The diode product detector was the easiest to build and gave the lowest noise output.
		Also, the noise of the receiver is considerably lower with a diode product detector over an active product detector.
		The 455 kHz filter (L40) is a ceramic filter with a 6 kHz bandwidth and a notch at 455 kHz.
	www.pan-tex.net /usr/r/receivers/elrprodet.htm (185 words)

	NRC: Exempt Consumer Product Uses
		Consumer products containing byproduct material that are used by the general public are exempted from licensing requirements only if the Commission determines that the products or types of uses do not constitute an unreasonable risk to the common defense or security or to public health and safety and the environment.
		When the product is released to the public by an NRC licensee, it must not contain residual byproduct material above exempt concentration limits found in 10 CFR 30.70, Schedule A.
		Gas and aerosol detector product use of byproduct material can be found in products such as smoke detectors and chemical agent detectors.
	www.nrc.gov /materials/miau/consumer-pdts.html (569 words)

	NukAlert Radiation Monitor - Detector - Meter (Site not responding. Last check: 2007-10-20)
		A: The reasons for acquiring a radiation detector or meter, and formulating a family nuclear response strategy, are as varied as are peoples concerns for the future and the safety of their loved ones in this ever changing world.
		As a licensed radiological laboratory we already knew that most all modern radiation detector and meter units available were designed for 'peace time' low-level radiation use and would not detect the higher, more dangerous, levels associated with nuclear emergencies.
		Another serious drawback of currently available 'portable' radiation detectors and meters was their very limited useful battery life and that even the best of them were still as big as a paperback novel.
	www.nukalert.com (2770 words)

	Detector Technology: Product Offering
		Each electron multiplier is delivered with a quality control label indicating its model number, test voltage, bias current at the test voltage and the date of shipment.
		DeTech was the first company to work with end users to develop a replacement detector for the standard Agilent Plug-In element.
		Since the active surface area of the CEM is increaased, the useful life of the CEM is also increased.
	www.detechinc.com /products.htm (337 words)

	Gasleakdetection.com Products Information Page (Site not responding. Last check: 2007-10-20)
		This is the product that provides the best protection against an explosion or gas poisoning because the gas control shutoff valve stops the flow of gas to the appliance and will not reset automatically.
		A Carbon Monoxide Detector is a vital component in assuring the safety of your family if you use natural or propane gas.
		When the detector senses the presence of carbon monoxide in your home, it signals a visual and audible alarm similar to a smoke detector.
	www.gasleakdetection.com /Products/products.htm (434 words)

	The Protectowire Company, Inc. - Flame Detectors
		The result is a unique and superior flame detector which provides excellent detection sensitivity with extreme immunity to false alarms.
		The sensor band pass has been carefully selected to ensure the greatest degree of spectral matching to the radiant energy emissions of fire, and the lowest degree of matching to non-fire stimuli.
		The 20/20R Flame Detector was designed to provide early warning of flaming fires involving organic (hydrocarbon fuels and vapors) materials.
	www.protectowire.com /products/flame_detectors.htm (540 words)

	Tayloe MIxer (Site not responding. Last check: 2007-10-20)
		The product detector has less that 1 dB of conversion loss from RF to
		The product detector also has the property of being narrow banded.
		The detector acts like an open circuit at the frequency it is tuned to.
	www.azqrp.org /azqrp/tayloe.htm (920 words)

	loop detector【Shanghai Autumncom】Vehicle Loop Detector\|loop detector product\|loop detector produce\|Vehicle Loop ...
		The company is specialized in developing and manufacturing the Vehicle Loop Detectors, Standard Barriers and RFID tags and Readers and other products related to car parking management system.
		Now, our products are well accepted by the distributors from all over the world and supplied to some world largest car parking management integrators.
		They have developed over many types of products up to now and can meet the requirement from the customers from all over the world within a short time.
	www.advparking.com (274 words)

	K40 Electronics - Radar Detector FAQ's (Site not responding. Last check: 2007-10-20)
		If a police car is not equipped with a radar or laser gun, a radar detector can not possibly locate it.
		During this type of encounter, an officer will wait until a targeted vehicle is within range to send a quick burst of radar to clock the vehicle's speed.
		K40 radar detectors are sensitive enough to detect these brief, weak signals, but you have to pay attention and react quickly.
	www.k40.com /Technical/radarfaq-6.html (220 words)

	Trace Leak Detector Product Specifications
		TRACE is a red dye, fluorescent tracer type leak detector for refrigeration, air conditioning and hydraulic systems.
		It is a concentrated dye penetrant with a fluorescent additive in a Polyol Ester lubricant base.
		TRACE products are especially effective in detecting "on and off" leaks because the red color and fluorescent tracer remain on the equipment until wiped off.
	www.highsidechem.com /tracspc.html (1011 words)

	DC Receiver/Product Detector
		More AF gain may be required for a Direct Conversion receiver and less for a product detector.
		When used as a product detector with preceding amplifier stages the gain of the CA3140 op-amp may need to be reduced.
		Some low frequency and high frequency roll-off in the audio range is provided by this circuit but additional frequency shaping is recommended for best results - see the additional AF band pass filter which is part of the Progressive Receiver Project.
	www.qsl.net /g3oou/id71.htm (414 words)

	Love Sense - The Love detector PC version
		Love Detector is new software for PC, which detects love and other emotions over the telephone (and MIC) by analyzing the human voice.
		Even though Love Detector is for entertainment only, it uses the same scientifically proven analysis engine as all other Nemesysco products for Emotion detection and accurately finding out how people feel using Nemesysco's unique voice analysis technology.
		To order the Love Detector package, please download it first form the site, install it, and follow the on screen instructions for purchasing your license number.
	www.love-detector.com /pcversion.html (284 words)

	HAMMARLUND Service Page
		To switch from AM to SSB, the audio amplifier input must be switched from the output of the AM detector to the output of the product detector.
		The relay is mounted near the AM and product detector location, so long shielded leads are not necessary.
		When the new product detector is connected to the V13 BFO, it will change the center frequency of the BFO somewhat.
	www.hammarlund.info /SP600mods.htm (1684 words)

	Product - Motion Detector
		Once connected, the video motion detector works using an "on screen display" consisting of four white rectangles.
		These rectangles can be positioned anywhere in your visual display, they can also be adjusted individually, horizontally or vertically to cover a larger or smaller area (see pictures).
		If there is any movement or sudden change of light level in the selected area, the video motion detector goes into an alarm condition emitting an audible warning tone (which can be silenced if required).
	www.baywatchsecurity.co.uk /products/Product_VideoMotion.html (392 words)

	mods.dk - Article: GUD product detector for the Drake R-4C (Site not responding. Last check: 2007-10-20)
		It is desirable that a product detector should be of the double balanced type in order to provide better isolation between input and output.
		However, since the original detector is not of the double balanced type, it has a tendency to cause distortion in the audio output because of feedback of detector and BFO output to the IF final stage.
		The GUD kit has been designed to alter the present R-4C detector to the doublebalanced type, thus eliminating the distortion in both the audio output and the AGC attack.
	www.mods.dk /print.php?ArticleId=2535 (587 words)

	Lightwave - Picolight intros laser and detector components
		The laser and detector components are aimed at embedded systems and digital optical transceivers for datacom and access applications.
		He says that the company's experience in 850- and 1310-nm technology, in conjunction with the fact that most of the products are already in volume production, gives Picolight an advantageous position in the subcomponent supplier space.
		Both 2.5-Gbit/sec ROSA products and 1310-nm detector TO-can products are available in configurations with various sensitivity, power consumption, and power monitor capabilities.
	lw.pennnet.com /Articles/Article_Display.cfm?Article_ID=183622&CFID=12887&CFTOKEN=69534618 (667 words)

	1010BN Interface Detector (Site not responding. Last check: 2007-10-20)
		The System 1010B is a clamp-on Product Identification Interface Detector with full temperature and pressure compensation.
		The system determines and displays the density and temperature of the liquid batch arriving at a terminal which identifies the product allowed for flowing into appropriate tankage.
		The 1010B clamp-on interface detector can be used with pipes ranging from 1” to 54” in diameter.
	www.controlotron.com /1010BN.htm (186 words)

	Leading Edge Telemetry Announces Ground Fault Detector Product
		The ground fault detector supports 110 to 480 VAC, on circuits to 50A, and operates on domestic and international frequencies of 50 and 60 Hz respectively.
		As such, the product does not require separate communication circuits and can be used either indoors or outdoors.
		Multiple ground fault detectors, lighting sensors and power meters transmit their data via power line carrier to a data logger, which pre-processes the data and relays it to a server via landline, wireless or Ethernet communication media.
	powerquality.com /news/power_leading_edge_telemetry (354 words)

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