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Topic: Pulse link repeater

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	CTRLink Glossary on Industrial Ethernet Terms
		The data link layer is responsible for transmitting and receiving frames.
		The fundamental unit of transmission at the data link layer of the OSI model.
		Often a single link is designated for flooding broadcasts and packets of unknown destination.
	www.ctrlink.com /glossary.htm (2623 words)

	Method of locating faulty pulse repeaters - Patent 4319080
		When a pulse train group in the test signal reaches a repeater whose supervisory frequency is identical to the frequency component in that pulse train group, a supervisory signal is produced by the band-pass filter coupled to that repeater, and this signal is sent along a return transmission path back to the testing terminal.
		The density of the pulse triplets in the output signal from pattern generation circuit 50, and hence the density of the pulse trio patterns in that signal, is controlled by an output signal from a pulse density changeover circuit 52.
		The polarity of the pulse triplets in the output signal from pattern generation circuit 50 is repetitively reversed by means of a polarity reversing circuit 56, in response to a rectangular wave signal at the supervisory frequencies which is applied thereto from a supervisory frequency signal generator 58.
	www.freepatentsonline.com /4319080.html (4723 words)

	Clock repeater for triplicated clock distributor - Patent 4698826
		The edge of this pulse in the signal CK is a positive edge corresponding to a negative edge f in the signal HMO; thus the inverter circuit 2 inverts the edge f of the signal HMO.
		In the repeater the inverter 1 introduces an error of 1 ns in respect of the edge f of the signal HMO and the inverter circuit 2 (exclusive-OR gate) introduces an error of 1 ns in respect of the edge of the signal CK corresponding to the edge f of the signal HMO.
		When a repeater receives a clock and synchronization signal from another repeater it introduces errors.epsilon.1 and.epsilon.2, but allowing for the fact that between the input and the output of a repeater the synchronization signal is shifted by two periods of the clock signal, these errors are not cumulative with those introduced by the preceding repeater.
	www.freepatentsonline.com /4698826.html (1446 words)

	Circuit Cellar - Digital Library - CCO
		NLP pulses are typically generated every 16 ms when the transmitter is idle, as indicated in Figure 6a.
		Note that the even pulses are the data pulses (one when a pulse is present 62.5 µs after a clock pulse, zero if there is no data pulse).
		Standard topologies for 100BaseT networks are one Class I repeater, which provides a network diameter of 200 m using copper cable and stations that may be 100 m from the repeater, and two Class II repeaters.
	www.circuitcellar.com /library/ccofeature/antonakos0402/3.htm (879 words)

	Class Definition for Class 375 - PULSE OR DIGITAL COMMUNICATIONS (Site not responding. Last check: 2007-10-09)
		Subject matter including a signal format in which a pulsed carrier is transmitted and is varied continuously in frequency in a known way during the transmission of a given pulse.
		Subject matter wherein the transceiver or transceiver"s component is compared by connecting a received path to a transmitted path and monitoring the output as an indication of the condition of the transceiver or transceiver"s component.
		Subject matter including a delay line tapped at the pulse or discrete step interval; a set of adjustable attenuators connected to each tap, except for a main tap, which attenuators can be used to multiply remaining tap signals by any number between 1 and minus 1; and a summing network.
	www.uspto.gov /go/classification/uspc375/defs375.htm (3484 words)

	Guide to Ethernet
		The repeater is a signal amplification device that keeps the system operating correctly by cleaning up and amplifying the signals that it repeats from one segment to the other.
		Multiport repeaters used for linking thin Ethernet segments often have internal 50 ohm termination provided on each port, which eases the task of terminating the end of the thin coax segment attached to the repeater.
		The repeaters used must comply with all IEEE specifications in section 9 of the 802.3 standard, and do signal retiming and reshaping, preamble regeneration, etc. If you do not use true IEEE 802.3 repeaters for all segment interconnections, then your Ethernet system cannot be verified using either configuration model.
	www.uwsg.iu.edu /usail/external/ethernet/ethernet-guide.html (7214 words)

	GLOSSARY P
		PULSE BANDWIDTH - The smallest continuous frequency interval outside of which the amplitude (of the spectrum) does not exceed a prescribed fraction of the amplitude at a specified frequency.
		PULSE DURATION (PD) - (1) In radar, measurement of pulse transmission time in microseconds, that is, the time the radar's transmitter is energized during each cycle.
		PULSE WIDTH JITTERING - The changing of the width of a radar pulse in a random or periodic manner.
	www.sew-lexicon.com /gloss_p.htm (6416 words)

	Pulse link repeater - Wikipedia, the free encyclopedia
		In telecommunications, a pulse link repeater (PLR) is a device that interfaces concatenated EandM signal paths.
		Note 1: A PLR converts a ground, received from the E lead of one signal path, to -48 Vdc, which is applied to the M lead of the concatenated signal path.
		Note 2: In many commercial carrier systems, the channel bank cards or modules have a "PLR" option that permits the direct concatenation of EandM signaling paths, without the need for separate PLR equipment.
	en.wikipedia.org /wiki/Pulse_link_repeater (120 words)

	THE HAM and PACKET RADIO GLOSSARY OF TERMS
		A backbone is a system of links where nodes may communicate without interfering with or being interfered with by local access, and where data may be passed in a fashion and with hardware that is optimized for passing data, rather than optimized for user stations.
		A point-to-point link between two dedicated ports for the exclusive use of those ports or nodes or for the use of stations passing through the network, using those two nodes.
		A digital store-and-forward node or digipeater is a regenerative digital repeater that receives a packet, verifies that it was received correctly, and if the Packet is correct, retransmits it on the same frequency it was received on.
	www.packetradio.com /Glossary.html (16381 words)

	Upgrading And Migrating From Eth (Site not responding. Last check: 2007-10-09)
		These pulses are the same signals used in 10Base-T to test link integrity and cause the link indicator light to turn on.
		If a repeater detects an illegal pattern on the wire, it may replace that pattern (and every remaining pattern in the frame) with a special symbol identifying that the frame is corrupt.
		The link will be reactivated if between 24814 and 37586 bit-times have passed without any information having been received, or if a valid carrier is received after between 64 and 86 bit-times of idle have occurred.
	www.netcolony.com /clifford/upgrading_and_migrating_from_eth.htm (1151 words)

	Glossary of Telecommunication Terms (Site not responding. Last check: 2007-10-09)
		A variant of pulse code modulation whereby a code representing the difference between the amplitude of a sample and the amplitude of the previous one is sent.
		The process of receiving distorted signal pulses and from them recreating new pulses at the correct repetition rate, pulse amplitude, and pulse width.
		The tone is on in the idle condition, pulsed for dialing, and off when the circuit is in use.
	www.globaltele.com /telecomglossary.htm (6619 words)

	Class Definition for Class 455 - TELECOMMUNICATIONS (Site not responding. Last check: 2007-10-09)
		A system for establishing a voice communication link between a base and a mobile transceiver via a wireless carrier wave channel that is allocated for use during a communication link, and wherein the mobile transceiver has a specific assigned call address number.
		Subject matter wherein the repeater or relay is associated with an artificial satellite orbiting the earth.
		Subject matter where the repeater operates in at least two directions at the same time by means of a plurality of repeaters at the same location.
	www.uspto.gov /go/classification/uspc455/defs455.htm (3128 words)

	An Introduction to Auto-Negotiation
		An FLP Burst is composed of 17 to 33 link pulses which are identical to the link pulses used in 10BASE-T to determine whether a link has a valid connection (sometimes referred to as Normal Link Pulses or NLPs.) FLP Bursts occur at the same interval as NLPs, 16.8ms.
		If the Link Partner also supported this type of remote fault sensing, then the situation would be equivalent to example 1, where the Local Device would inform management of the fault status.
		The Link Partner is not transmitting FLP Bursts and instead transmits signals of a technology that the Local Device cannot support.
	library.n0i.net /hardware/intro-to-autonegotiation (4246 words)

	Untitled
		The repeater timeout is DTMF field programmable from 20 seconds to 40 minutes in 10 second intervals and reset on the repeater courtesy beep or with DTMF digit 1 allowing for user reset.
		When the repeater is in use the CW ID is used to identify the repeater.
		The linking of repeaters has become a desirable feature in emergency operations when large area coverage is needed than the local repeater can provide.
	home.earthlink.net /~mccrpt/rc1kvweb.htm (2241 words)

	Glossary
		dial pulse - A short duration, direct-current signal produced by or simulated to emulate the opening and closing of contacts in a rotary telephone dial when dialing numbers.
		link layer - (1) The logical entity in the OSI model relative to transmission of data between adjacent network nodes.
		out-of-band signaling - Use of a separate data link which is not in the voice circuit to transmit call set-up and ANI information from carrier to carrier, or from carrier to customer.
	www.icancommunicate.com /glossary.htm (13952 words)

	Synetcom - Rugged 4-20 mA Spread Spectrum Modbus Radio Modem
		Link a single sensor to your data acquisition network or use WISE 4-20 to build SCADA systems, long range links and regional wireless data acquisition and remote control networks.
		The link between remote and host is a secure, error-protected digital radio link at 50 MHz, 900 MHz or 2.4 GHz, or a traditional telemetry radio system, at VHF or UHF.
		WISE Repeaters are used whenever either distance or major obstructions cause the radio signals to be weak.
	www.synetcom.com /wise420.htm (1092 words)

	CyberXLink.com, cat5E, wall plates, keystone jacks, cat6, brackets, bezels, rj45, rj12, rj11, boots, rca, hdmi, dvi, ...
		link margin - The amount of available signal level (in dB) between the normal receive level and the point at which the signal is too weak to be received.
		A continuity test pulse sent between media attachment units on a twisted-pair link on an Ethernet network.
		link reliability - A calculation of how much of the time a system is expected to be functional (expressed in percent or time).
	www.cyberxlink.com /L_Definitions.php (2702 words)

	Glossary of Telecommuncations Terms
		DELTA MODULATION (DM) A variant of pulse code modulation whereby a code representing the difference between the amplitude of a sample and the amplitude of the previous one is sent.
		DIAL PULSING (DP) The transmitting of telephone address signals by momentarily opening a DC circuit a number of times corresponding to the decimal digit which is dialed.
		PULSE CODE MODULATION (PCM) The form of modulation in which the information signals are sampled at regular intervals and a series of pulses in coded form are transmitted representing the amplitude of the information signal at that time.
	www.telephonetribute.com /glostele.htm (8216 words)

	WildPackets - Migration
		Whether one or two repeats may be used is determined by what class of repeater will be used on the segment.
		Two Class II repeaters are allowed in a single collision domain, with up to a 5 meter inter-repeater link between them.
		The link will be reactivated either if between 24814 and 37586 bit-times have passed without any information having been received, or if a valid carrier is received after between 64 and 86 bit-times of idle have occurred.
	www.wildpackets.com /support/compendium/fast_ethernet/migration (1208 words)

	The WB4IUY 29.620 Repeater in Zebulon, NC
		It is sponsored by the Five County Repeater Group and carries the callsign of WB4IUY, one of it's owners.
		The repeater output is 29.620 mhz, and the input is 29.520 mhz.
		A pl of 88.5 is encoded on the UHF link tx output during COS activity for linking purposes.
	www.ipass.net /teara/2962.html (999 words)

	REP-200 Repeater
		Rather than just add a micro-computer controller, we completely rethought the whole idea of what a repeater should be, to provide the best features at the lowest possible cost.
		The brain of the repeater is a 6803 µP with a 27C32 eprom and 9 support chips on the COR-5 Controller board.
		Use for cross linking two repeaters, for a second input frequency, or a control link.
	www.hamtronics.com /rep200.htm (1095 words)

	Airlink Wireless Point to Point Modem Equipment
		This technology delivers very low bit error rate links that have high immunity to interference.
		These links are ideal for public and private networks.
		High-performance links are ideal for frame relay applications and last-mile feeders into optical and satellite networks.
	www.pulsewan.com /wireless/airlink.htm (133 words)

	[No title]
		++ DELTA MODULATION (DM) A variant of pulse code modulation whereby a code representing the difference between the amplitude of a sample and the amplitude of the previous one is sent.
		++ DIAL PULSING (DP) The transmitting of telephone address signals by momentarily opening a DC circuit a number of times corresponding to the decimal digit which is dialed.
		++ PULSE CODE MODULATION (PCM) The form of modulation in which the information signals are sampled at regular intervals and a series of pulses in coded form are transmitted representing the amplitude of the information signal at that time.
	www.hackcanada.com /canadian/phreaking/telecom-acronyms.txt (7949 words)

	CAT-1000 Repeater Controller
		Divided into groups of eight, according to their function, they can be manually controlled through the repeater, link or telephone.
		In sophisticated repeater systems, it is often necessary to pass DTMF commands to distant repeaters within the linking system.
		When the repeater is in the CTCSS mode, a user without a CTCSS encoder can activate the repeater by entering a special DTMF access command.
	www.catauto.com /cat1000.html (1170 words)

	What is a radio repeater?
		A radio repeater is a base station radio with a large antenna.
		Each portable radio communicates with the repeater and the repeater rebroadcasts the signal for the other portable.
		Radio repeaters are not allowed on CB (Citizens Band), FRS (Family Radio Service), or MURS (Multi-Use Radio Service).
	www.tech-faq.com /radio-repeater.shtml (199 words)

	ePanorama
		Use printer port as programmable frequency generator - A simple and inexpensive circuit and a simple C program are all you need to turn your PC's printer port into a programmable frequency generator.
		Centronics port generates narrow pulse widths - Variable-pulse-width signals are useful in control circuitry for positioning and holding purposes in robotics and power electronics.
		The desired pulse is available at the PC's Centronics port through a buffer stage, which protects the port from overload damage.
	www.epanorama.net /links/project_pc.html (3200 words)

	ARRLWeb: A TV Remote Control Decoder
		The infrared receiver on the appliance in turn receives that beam of infrared light pulses and converts it into electrical impulses that correspond to the key code, and sends those impulses to a computer that controls the appliance.
		This concept is not new to hams; the same technique is commonly used in FM repeaters to prevent retransmissions of unintentional signals, called a subaudible tone.
		So when the infrared pulses are being received, a 2.4 ms space pulse is recognized as a start pulse, a 1.2 ms space pulse is recognized as the 1, and a 0.8 ms space pulse is recognized as a 0.
	www.arrl.org /news/features/2004/03/30/1 (2002 words)

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