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Quadrature Amplitude Modulation
a digital bitstream whose values are represented by adjustments in phase and amplitude of sinusoidal electromagnetic waves.
See Also: QAM, QAM Analyzers
- DragoonITCN
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Countermeasures Sequential Timing & Amplitude Tester
C-STAT
C-STAT, or Countermeasures Sequential Timing and Amplitude Tester, is a Firing Pulse Interval Test Set, a suite of test components designed to analyze firing pulse timing and amplitudes from a CMDS system such as ALE-47.
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DSP Upconverters
Renesas digital signal processing (DSP) upconverter products include a quad programmable upconverter (QPUC) which is a QASK/FM modulator/FDM upconverter designed for high dynamic range applications such as cellular basestations and a wideband programmable modulator (WPM) which is a quadrature amplitude modulator/upconverter designed for wideband digital modulation.
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QAM And PCM Analyzers
GAOTek provides a wide range of high performance and inexpensive QAM/PCM analyzers. Quadrature amplitude modulation (QAM) and pulse code modulation (PCM) analyzers are convenient instruments with top to bottom estimations and adaptable setups. Additionally, these devices have integrated functions of analog signal generators/receivers, BERT, signaling generators/receivers, selective level meters, ring generators/ identifications, dialers, DC loop circuits (ICT, OGT), balanced bridges and reflecting bridges into solitary instruments. These analyzers are ideal for installing and maintaining digital and analog networks.
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Quadrature Sensor
SPECTEC Innovative Sensor Solutions
DIGISPEC Hall Effect Quadrature Sensors provide two digital output signals, 90º out of phase to each other, detecting speed (down to true zero speed) and direction of rotation of gear teeth and ferrous targets. Gear teeth as small as module 0.10" wide can be sensed. Standard output is provided from a 2.2kOhm internal pull-down resistor to a collector, which can sink 25 mA. Open collector can be provided. Output is protected against reverse voltage.
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Amplitude Detection
DLVA
BSC have full design and manufacture expertise in house to offer high reliability mixed technology Microwave and RF modules such as Successive Detection Log Video Amplifiers (SDLVA).
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Quadrature Signal Generator
TE5100-PCI
The TE5100 is a 100MHz Direct Digital Synthesized Signal Generator available in a 3U, CompactPCI or straight PCI format. The TE5100 generates Sine and ACMOS/TTL output signals simultaneously up to 100MHz in 1 µHz steps. Sweep, FSK, Chirp and Single Tone are generated on board. The virtual panel allows control up to 100MHz of all parameters. The TE5100 is equipped with a ±1ppm on-board TCXO clock and can accept an external clock source.
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Quadrature Digital Up Converters
QDUC
Analog Devices digital up/downconverters serve as the frequency translator and digital filter between data converters and DSP blocks. These innovative products enable highly programmable and configurable receive and transmit signal chains, allowing multichannel, multicarrier radio platforms in 3G wireless base stations. They also meet the digital data conversion requirements for many other communications applications.
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Amplitude Detectors with Isolators
Full band waveguide detectors are GaAs beam lead Schottky diode-based detectors that are specially designed for millimeterwave network analyzer applications. With a proprietary circuitry design and careful diode selection, these zero-biased detectors exhibit high sensitivity and extremely flat output characteristics. The below standard offering covers the frequency range of 18 to 170 GHz and offers a 1 MHz video bandwidth and 1 MΩ video output impedance. The standard models also have the capacity to handle a maximum RF input power of up to +17 dBm. The RF interface of these detectors is a standard waveguide with an integrated Faraday isolator to improve the port VSWR. The output voltage polarity is negative and the connector type is a female SMA. Other configurations are offered as custom models.
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Modulation Measurement System
MMC
This connector panel is used to bring test signals from the rear side of a rack up to the front side of the rack so that measurements can be made without climbing in behind the rack.
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Time to Amplitude Converters and Calibrator
A Time-to-Amplitude Converter (TAC) can achieve exceptional precision by using an analog technique to convert small time intervals to pulse amplitudes. When a timing application demands picosecond precision, a time-to-amplitude converter is a prime candidate. A time-to-amplitude converter is a productive solution for measurements less than 10 μs when time resolutions from 10 ps to 50 ns are required.
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PC/104 Digital Quadrature Encoder Input Board
104-QUAD-8
The 104-QUAD-8 card is a general purpose Quadrature Encoder Counter/Interface board. It is provided in the popular 104 format and conditions and monitors the outputs of 8 encoders. I/O connectors are right-angle 34-pin headers.
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Analog Modulation and Frequency-Dependent Measurements
Modern lightwave transmission systems require accurate and repeatable characterization of their optoelectronic, optical and electrical components to guarantee high-speed performance.
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Amplitude Detectors
Amplitude detection, which eliminates the carrier (or the subcarrier) at the Doppler filter output
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Modulation Distortion Up To 70 GHz
S930707B
S930707B enables fast and accurate active-device modulation distortion characterization under modulated stimulus condition up to 70 GHz. The wide dynamic range and vector error correction of the PNA-X result in an extremely low residual EVM of the test setup, so you can get a complete picture of your device’s performance without test system interference. S930707B can measure EVM, NPR, ACPR, and can decompose nonlinear signals and linear signals with the spectral correlation between input and output spectrum without doing demodulation. Integration with the PNA-X SCCM provides quick modulation distortion measurements while making other VNA measurements.
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Arbitrary Load Control For Modulation Distortion
S94570B
Extend the modulation distortion application by computing figure of merits such as EVM and ACPR for any desired load with arbitrary load control (ALC). Modulation distortion with ALC integrates the powerful capabilities of the PNA-X with an electromechanical tuner so a non-50 Ω load can be presented to the DUT and changes in device performance or sensitivity to varying load conditions can be accurately measured.
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Optical Modulation Index
OMI
*Automatically measures OMI*Helps to optimize transmitters in just minutes*Eliminates the need for expensive equipment*Useful for multiple CATV system procedures*DOCSIS 3.1 compatible
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Signal, Spectrum, & Modulation Analyzers
A tool used to analyze data. For example, a gas analyzer[1] tool is used to analyze gases. It examines the given data and tries to find patterns and relationships. An analyser can be a piece of hardware or software.
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Quadrature Incremental Decoder Interface for VMEbus
VME323
The VME323 is an Intelligent Quadrature Incremental Decoder VMEbus Board which can be configured for interfacing quadrature incremental encoders with or without an index channel. In index mode up to sixteen encoders with two quadrature channels and an index channel can be connected, and in non-index mode up to twentyfour encoders with two quadrature channels can be connected. The VME323 operates on two encoder input channels and decodes a pair of out-of phase signals in order to increment or decrement a counter.
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0.3Hz-3MHz Amplitude Display Functional Generator
MFG-8303
Features:*Max. frequency up to 15MHz*Single-chip function generating module provides high stability and low distortion waveforms*5 digit frequency display, 3 digit amplitude display.*Built-in frequency meter for testing external signal up to 20MHz*Linear and Logarithmic sweep function.*AM/FM function optional(Models with suffix “A”)*5W Power Output function optional(Models with suffix “W”)
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PCI Counter/Timer with Quadrature Board
APC484
Several models with a variety of configurations provide up to ten counter/timer channels for counting events, generating waveform control signals, measuring pulse-widths, periodic rates, or quadrature position and monitoring operations.
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0.3Hz-6MHz Amplitude Display Functional Generator
MFG-8306
Features:*Max. frequency up to 15MHz*Single-chip function generating module provides high stability and low distortion waveforms*5 digit frequency display, 3 digit amplitude display.*Built-in frequency meter for testing external signal up to 20MHz*Linear and Logarithmic sweep function.*AM/FM function optional(Models with suffix “A”)*5W Power Output function optional(Models with suffix “W”)
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Modulation Distortion Up To 43.5 GHz
S930704B
S930704B enables fast and accurate active-device modulation distortion characterization under modulated stimulus condition up to 43.5 GHz. The wide dynamic range and vector error correction of the PNA-X result in an extremely low residual EVM of the test setup, so you can get a complete picture of your device’s performance without test system interference. S930704B can measure EVM, NPR, ACPR, and can decompose nonlinear signals and linear signals with the spectral correlation between input and output spectrum without doing demodulation. Integration with the PNA-X SCCM provides quick modulation distortion measurements while making other VNA measurements.
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PCI Counter/Timer with Quadrature
APC482
Several models with a variety of configurations provide up to ten counter/timer channels for counting events, generating waveform control signals, measuring pulse-widths, periodic rates, or quadrature position and monitoring operations.
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Modulation Distortion For E5081A Up To 20 GHz
S960704B
The Keysight S960704B modulation distortion software application enables fast and accurate active device modulation distortion characterization under modulated signal conditions up to 20 GHz. The wide dynamic range and vector error correction of the ENA-X yield an extremely low residual EVM of the test setup, delivering a complete picture of your device’s signal distortion performance without test system interference. S960704B software measures EVM, NPR, ACPR, and decomposes linear and nonlinear signals by spectrally correlating input and output spectrum without needing to demodulate. Integration with the ENA-X measurement flexibility enables quick modulated signal distortion measurements along with traditional VNA tests.
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Eight and Four Channel Quadrature Encoder Input Cards
mPCIe-QUAD
The mPCIe-QUAD-8 consists of a type F1 PCI Express Mini Card (mPCIe) interface board that connects to two DB-37F Modules via included 9” cables. The mPCIe-QUAD-4 consists of a type F1 PCI Express Mini Card (mPCIe) interface board that connects to one DB-37F Module via an included 9” cable. The modules are designed to be easily panel-mounted in any application environment, and have convenient mounting holes for non-panel-mount applications. Up to eight differential (or single-ended) encoders (each with A, B, and Index) can be monitored simultaneously.
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Optical Modulation Analyzer and High-speed Digitizer Test Solution
M8290A
The M8290A is a flexible solution platform for 400G coherent component and transmitter test. It incorporates a 92 GSa/s modular optical modulation analyzer and a 92 GSa/s 4-channel electrical digitizer. Besides these modules an additional arbitrary waveform generator module up to 92 GSa/s, such as the M8196A, can be added to the same AXIe chassis. This setup results in a compact and flexible coherent test solution that can be used together with additional specialized solution software for Integrated Coherent Receiver (ICR) and Analog Coherent Optical (ACO) module characterization.
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PCI Counter/Timer with Quadrature Board
APC483
Several models with a variety of configurations provide up to ten counter/timer channels for counting events, generating waveform control signals, measuring pulse-widths, periodic rates, or quadrature position and monitoring operations.
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3MHz Multi-Waveform Signal Generator with Modulation
Model MSGM3M
- 0.3Hz to 3MHz Frequency Output in 8 Ranges- Versatile Waveforms: Sine, Square, Triangle, Ramp, Pulse and DC outputs- Standard AM, Balance AM, FM, ASK, FSK, PWM Modulation and Sweep Mode- Internal / External Modulation
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Modulation Distortion Up To 13.5 GHz
S930701B
S930701B enables fast and accurate active-device modulation distortion characterization under modulated stimulus condition up to 13.5 GHz. The wide dynamic range and vector error correction of the PNA-X result in an extremely low residual EVM of the test setup, so you can get a complete picture of your device’s performance without test system interference. S930701B can measure EVM, NPR, ACPR, and can decompose nonlinear signals and linear signals with the spectral correlation between input and output spectrum without doing demodulation. Integration with the PNA-X SCCM provides quick modulation distortion measurements while making other VNA measurements.
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IRIG Amplitude Modulated Time Code Distribution Amplifier
1205A / 1205A-MC
Precise Time and Frequency, Inc.
The ptf 1205A is a 12-channel IRIG amplitude modulated time code distribution amplifier housed in a 1U high, 19″ rack package. The ptf 1205A uses an RF design combining the latest technology in low noise components to minimize input/output delays which are of the order of nano seconds.The unit uses two stages of input signal buffering to distribute the input signal to 12 separate outputs, and insure maximum isolation between individual output signals.
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Quadrature Position & Rate Meter
Accepts low-level differential or single-ended 5 V logic level quadrature signals from shaft encoders to display scaled position or scaled rate. One, two or four transitions may be counted at a maximum combined rate of 250 kHz and be mathematically scaled to display in engineering units from -999,999 to +999,999. An analog output scaled to the display and relay outputs are optional.
