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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
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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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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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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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Modulation Analyzers
Provides precision modulation and audio analysis in a single, easy-to-operate package. Measures AM, FM, PM, carrier and audio frequencies, SINAD, distortion and carrier level.
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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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Quadrature Input PCI Cards
PCI-QUAD-8
The PCI-QUAD-8 provides quadrature counting on a convenient half-length PCI card. Up to eight differential encoders (each with A, B, and Index) can be monitored simultaneously.
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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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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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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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Quadrature Decoder Board
MSXB 050
The MSXB 050 Quadrature Decoder Board allows a Data Acquisition Processor to read quadrature-encoded signals through its digital port. Quadrature-encoded signals are often used to measure the angular velocity and angular position of wheels, gears, and motors.
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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.
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Modulation Distortion Up To 53 GHz
S95070B
S95070B software enables fast and accurate active device modulation distortion characterization under modulated stimulus conditions up to 53 GHz. The wide dynamic range and vector error correction of the PXI VNA results in an extremely low residual EVM from the test setup, giving you a complete picture of your device’s performance without test system interference. S95070B software measures EVM, NPR, ACPR, and decomposes nonlinear signals and linear signals through spectral correlation between the input and output spectrum, without doing demodulation. Integration with the PXI VNA’s measurement flexibility enables you to do quick modulation distortion measurements along with traditional VNA tests.
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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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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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Amplitude Detectors
Amplitude detection, which eliminates the carrier (or the subcarrier) at the Doppler filter output
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Optical Modulation Generator Software
81195A
The Optical Modulation Generator Software 81195A introduces a new approach to optical test. Combined with the M8195A AWG it speeds up your test by a factor of up to 100 with its unique real-time mode. This helps design engineers of long-haul and metro optical transmission applications to maximize test efficiency and thus reduce development time and cost.
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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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Modulation Analyzer
8201A
The Model 8201A provides precision modulation and audio analysis in a single, easy-to-operate package. Measures AM, FM, PM, carrier and audio frequencies, SINAD, distortion and carrier level.
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Modulation Distortion Up To 90 GHz
S930709B
S930709B enables fast and accurate active device modulation distortion characterization under modulated stimulus conditions up to 90 GHz. The wide dynamic range and vector error correction of the PNA-X results in an extremely low residual EVM of the test setup, delivering you a complete picture of your device’s performance without test system interference. S930709B measures EVM, NPR, ACPR, and decomposes 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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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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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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Two Channel Phase and Amplitude Noise Analyzer
DCNTS -190
The DCNTS is a two channel Phase and Amplitude noise analyzer. Its dual demodulator architecture allows the system to use cross-correlation to cancel its internal noise and limitation; it is like comparing the outputs of 2 systems and only display the similarities while rejecting differences. Its main extension is the Residual Noise measurement front-end which includes all necessary hardware to automatically measure residual noise on 2-ports devices either in RF frequencies or microwave. It could be a frequency multiplier or divider, an amplifier or any other phase coherent input to output device.
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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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Stream Processing & Modulation
MediaKind’s broad range of Video Processing Management products are engineered for the full range of control and monitoring needs and applications.
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Modular Optical Modulation Analyzer
M8292A
Optimized for the 400G speed class, the M8292A optical modulation analyzer provides a compact, faceless and rack-mountable test instrument that connects to the optical output of coherent transmitters. It leverages the full feature set of Keysight's vector signal analyzer and optical modulation analyzer software ensuring a known-good customer experience for analyzing complex modulated data signals.
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Couplers (Quadrature, 180, Directional)
PMI offers the highest quality quadrature couplers for commercial and military applications in the frequency range of a few MHz to 40 GHz. If you do not see exactly what you need, please email your requirement to sales@pmi-rf.com so we can propose an instant solution.
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Coherent Modulation Transmitter
IQTX
Generating and controlling phase modulated optical signals is easy with the IQTX. The IQTX is referred to as a ‘Golden’ reference optical signal source because of its high repeatability and reliability.Its high bandwidth of 40 GHz ensures high quality optical signal generation, making it the ideal optical signal source for coherent 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 Distortion Up To And Beyond 125 GHz
S930713B
S930713B enables fast and accurate active-device modulation distortion characterization under modulated stimulus conditions up to and beyond 125 GHz. The wide dynamic range and vector error correction of the PNA-X results in an extremely low residual EVM of the test setup, delivering you a complete picture of your device’s performance without test system interference. S930713B measures EVM, NPR, ACPR, and decomposes 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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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.
