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7058436 |
Superconducting filter apparatus and wireless receiving amplifier having an abnormality discriminating circuit
A superconducting filter apparatus having a refrigerator for cooling the superconducting filter to cryogenic temperatures, a pilot signal generator for generating a pilot signal that is outside the...
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7042935 |
Equalizer and equalization method
An equalizer and an equalization method capable of suppressing distortion specific to radio unit and reducing both the oversampling number and the amount of calculations without causing...
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6587012 |
Automatic slope and gain (ASG) detector technique including a pilot signal
An apparatus ( 7 ) for switching from a first pilot signal and a second pilot signal on a system transporting a plurality of signals. A tuner ( 30 ) receives the signals and provides an output...
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6545567 |
Programmable analog tapped delay line filter having cascaded differential delay cells
Method and system for a programmable analog tapped delay line filter are disclosed. One embodiment of the present invention is a programmable analog tapped delay line filter comprising an input...
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6169585 |
Circuit arrangement for demodulating an intermediate-frequency video signal
In a circuit arrangement for demodulating an intermediate-frequency video signal generated while using a Nyquist edge, having a phase-locked loop (1) including a phase detector (3), a loop filter...
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6043919 |
Frequency characteristic correction system for optical network
The object of the present invention is to reduce the man-hours for correction of the frequency characteristic of an optical network thereby to augment the productivity. A frequency characteristic...
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5495468 |
System and method for transmitting plural information waveforms over a single communications channel using lincompex techniques
At least two information waveforms are transmitted over the same communications channel using Lincompex techniques. Each of the information waveforms are modulated using Lincompex techniques to...
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5126700 |
Phase stable RF transport system
An RF transport system delivers a phase-stable RF signal to a load, such as an RF cavity of a charged particle accelerator. A circuit generates a calibration signal at an odd multiple frequency of...
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5065410 |
Method and arrangement for setting an amplitude equalization characteristic on an equalizer for use in a modem
An equalizer characteristic of an amplitude equalizer for use in a modulating and demodulating device (MODEM) can be set with considerable ease. One of a plurality of equalization characteristics...
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5058202 |
System and method of transmitting and receiving a licompex modulated signal over a communication channel utilizing frequency modulation techniques
A system for transmitting and receiving frequency modulated signals utilizes linked compressor/expander (Lincompex) techniques. The signal to be transmitted is first processed by a Lincompex...
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4984079 |
Video preamplifier circuit
A high speed, variable gain video preamplifier circuit disposed on a single IC which can accommodate multiple video input channels supplied by cables of varying length. A multiplexer 34 uses...
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4970722 |
Broadband local area network
A broadband local area network transmits outbound signals in an outbound frequency band and inbound signals in an inbound frequency band. In one configuration, the network comprises a central hub...
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4947386 |
Fixed gain fixed loss amplification system
An easy to install and easy to expand broadband local area network is disclosed. The network has a star-type architecture based upon a fixed-gain, fixed-loss approach to amplification and a...
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4835494 |
Automatic level control system for broadband cable systems
A device including automatic gain control for balancing losses in a coaxial transmission path of a network is disclosed. The device includes a fixed gain bidirectional amplifier, an equalizer...
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4746881 |
Equalizer for frequency independent and dependent transmission loss components with a pilot used for the frequency independent component
In addition to an information signal subjected to a frequency dependent and a frequency independent loss component and delivered to an automatic equalizer through a transmission path which is...
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4642583 |
Noise reduction in companding arrangements
In a companding arrangement, the presence of a tone in only one of the two transmission directions is detected. Upon such detection, for example during set-up of a telephone call via a satellite...
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4389623 |
Automatic equalizer ulitizing a preiodically contained reference signal
An automatic equalizer comprises a transversal filter connected to receive an input signal such as a television signal in which a predetermined periodic reference signal is present and having...
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4253072 |
Compandor with sampling and equalization
A syllabic compandor using a pilot in the signal frequency band, with a compression ratio between approximately 2 and 20, including a frequency and delay equalizer in the negative-feedback...
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4233576 |
Automatic polarization decoupling network
An automatic polarization decoupling circuit for decoupling first and second signals originally transmitted with orthogonal polarizations comprising a rotatable quarter-wave plate and a rotatable...
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4225832 |
Self-adapting equalizer
A control signal x(t) of known characteristics is transmitted over a transmission channel (1) together with a useful signal y(t). The equalizer comprises essentially: a local generator (5) for...
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4201959 |
Automatic equalization system
In a long line transmission system, the signal level at the transmission station is pre-equalized by the value L s which is adjustable according to the signal level at the receiving station. The...
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4196405 |
Self-correcting equalization system
The invention consists in an equalization system with two sections, one at each end of a transmission channel. The section at the transmission end adds control signals to information signals to be...
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4158113 |
Level regulator governed by a pilot tone
The invention relates to transmission systems and in particular to level regulators controlled by a pilot tone and used in such systems to correct variations over a period of time in the...
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4151490 |
Automatic cable equalizer circuit
A cable equalizer is provided for automatically compensating a signal for cable attenuation as the length of the cable is varied. The circuit detects changes in a reference signal that is inserted...
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4028644 |
System equalization for repeatered submarine cable system
A system equalizer and a method of equalization employed in a repeatered submarine cable system, in which automatic gain controlled (AGC) submerged repeaters are employed to compensate for...
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4003006 |
Pilot tone controlled adaptive amplitude equalizer
An adaptive equalizer to compensate for the effects of frequency-selective fading on a microwave radio system. The equalizer includes two Bode-type bump networks and an AGC amplifier whose slope...
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3942137 |
Device for the remote adjustment of an inaccessible element
The invention relates to a device for the remote adjustment of a switchable network equipping an unattended station on a transmission line, by means of remote control frequencies emitted from a...
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3895322 |
Tone controlled compandored system
A fixed power level frequency pilot tone, typically 4000 Hz, is inserted into the transmission baseband closely associated with each voice channel of a multichannel telephone cable system. The...
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3838230 |
COAXIAL CABLE TRANSMISSION LINE
A coaxial cable transmission line for comparatively high frequencies comprises coaxial cables and intermediate repeaters. Each repeater consists of two separate amplifier units connected in...
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3804995 |
ARRANGEMENT FOR SUPPRESSING OVERSHOOT CAUSED BY LEVEL REGULATION IN CARRIER-FREQUENCY SYSTEMS
This relates to level regulation in a carrier frequency system with a plurality of repeaters in tandem. More particularly, the level regulator at the repeaters suppress overshoot (excessive...
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3790906 |
SYSTEM FOR STABILIZING CABLE PHASE DELAY UTILIZING A COAXIAL CABLE UNDER PRESSURE
A system for stabilizing the phase delay of signals passing through a pressurizable coaxial cable is disclosed. Signals from an appropriate source at a selected frequency, e.g., 100 MHz, are sent...
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3772617 |
METHOD AND ARRANGEMENT FOR SETTING THE REMANENT FLUX DENSITY IN MAGNETIC CIRCUITS AND EQUALIZER UTILIZING SAME
The remanent flux density in a selected portion of a magnetic circuit is precisely set to a desired value by comparing the flux density in the selected portion to a predetermined reference,...
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3772505 |
SYSTEM AND METHOD FOR ON-LINE SIMULATION OF BULK POWER SYSTEM TRANSIENTS AT VERY HIGH SPEEDS
In a simulation system, there is provided a system for controlling the effective impedance connected to a node or bus whose instantaneous voltage value varies sinusoidally at a known frequency....
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3758881 |
TRANSVERSAL EQUALIZER CONTROLLED BY PILOT TONES
A transversal equalizer is controlled by harmonically related pilot tones transmitted along with the message signals. Two of the tones near the center of the transmission band differ in frequency...
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3748602 |
DETERMINATION OF EQUALIZER SETTING IN TELECOMMUNICATION SYSTEM
A wide-band equalizer for a telecommunication system includes a symmetrical corrector and an asymmetrical corrector, each encompassing the entire band, and a multiplicity of parallel corrective...
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3668533 |
FEEDBACK CONTROL SYSTEMS
An amplifier arrangement includes an amplifier and a feed back system for maintaining the amplifier operating at a direct point on a non-linear part of its characteristic. The feed back system...
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3569869 |
THERMAL COMPENSATION FOR A RADIO FREQUENCY TRANSMISSION LINE
An electric network is described for compensating a transmission line system for temperature variations. Two types of compensating networks are described, one varying in response to temperature;...
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3515819 |
BREAKDOWN DETECTING ARRANGEMENT FOR TRANSMISSION SYSTEMS WITH NOISE
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3510793 |
AMPLIFIER REGULATOR EMPLOYING AN ELECTROLYTIC VARIABLE RESISTANCE DEVICE
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3496309 |
PILOT CONTROLLED STEP-BY-STEP LEVEL REGULATOR
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3492583 |
FM SYSTEM WITH PILOT SIGNAL TO MEASURE GROUP DELAY
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3492579 |
FM SYSTEM WITH PILOT SIGNAL TO MEASURE GROUP DELAY
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3483334 |
COMMUNICATION SYSTEM WITH GAIN CONTROLLED INTERMEDIATE REPEATER STATIONS
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3470498 |
AUTOMATIC SYSTEM FOR PREVENTING THE USE OF ERRONEOUS PILOT INFORMATION
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3458815 |
CONSTANT LEVEL SIGNAL TRANSMISSION WITH BAND-EDGE PILOT TONE AMPLITUDE ADJUSTMENT
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3456191 |
LEVEL CONTROL SYSTEM FOR A COMMUNICATION SYSTEM OF THE TYPE IN WHICH A PILOT SIGNAL IS COTRANSMITTED WITH INFORMATION SIGNALS BETWEEN AN INITIAL STATION AND A FINAL STATION
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3414688 |
Communication system having level control means for repeaters connected along a transmission cable
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3414687 |
Transmission system having a plurality of separate parallel transmission lines and common control of intermediate repeater stations in the transmission lines
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3387232 |
Pilot-controlled regulating apparatus for transmission systems
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3360748 |
Double threshold gain regulator for communication systems
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