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Metrology-grade performance for demanding applications
Keysight XG7-class Pro analog signal generators include the E8257D and E8663D PSG signal generators. They offer metrology-grade accuracy and phase noise and frequency coverage up to 67 GHz (extendable to 1.1 THz) for testing critical applications in calibration labs, research environments, and production testing. You can rely on the highest-quality signals, from pure continuous wave (CW) tones to complex analog modulated signals with up to 1 W of power with a high-power extension. Choose one of our most popular configurations or build the one you need for your application. Need help selecting? Check out the resources below.
Spectral purity
Low phase noise, harmonics, and spurious signals ensure accurate testing of RF integrated circuits (RFICs), communication receivers, and other high-precision applications.
High max frequency
Offers max frequency of 67 GHz, and up to 1.1 THz with a frequency extender, enabling 6G research and development (R&D) and very high-frequency radar and satellite communication testing.
Metrology-grade signals
Traceable to national and international standards, ensuring accurate, repeatable results with minimal errors, ideal for precision signal generation in R&D, military testing, and satellite communications.
Ultra-high output power
Test high-power devices and overcome test system losses with optional high-power extension, which increases the maximum output power to +30 dBm (1 W), reducing the need for external amplification.
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Maximum frequency
67 GHz
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Number of outputs
1
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Phase noise @1 GHz (20 kHz offset)
-143 dBc/Hz
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Output power @1 GHz
21 dBm
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Harmonics @ 1 GHz
-55 dBc
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Frequency switching speed
11000 µs
Typical configuration
XG7-class Analog Signal Generator
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Frequently asked questions
Metrology-grade signaling represents the highest level of precision and accuracy in RF signal generation. It is engineered to meet the stringent standards necessary for calibration, scientific research, and high-precision testing and measurement applications. These signal sources demonstrate ultra-low phase noise, exceptional spectral purity, minimal spurious emissions, and highly accurate frequency and amplitude stability.
Spurious signals are unwanted emissions that originate from the devices under test. Various combinations of signals in a transmitter and receiver can result in spurious signals. Spurious responses may be a spur from a local oscillator (LO), a harmonic of a power supply, distortion products, or a harmonic of the system clock. They degrade not only the receiver sensitivity but also nearby wireless systems.
For information on how to effectively measure spurious signals, check out this blog.
The maximum frequency of a signal generator refers to the highest frequency it can output, defining the upper limit of its signal generation capability. For example, a signal generator with a maximum frequency of 67 GHz can generate signals across a vast range—from near-zero frequencies up to 67 billion cycles per second (67 GHz). This broad capability makes it ideal for advanced applications, such as testing high-speed electronic components, characterizing radar systems, or supporting next-generation communication technologies.
This frequency ceiling is a crucial specification that directly affects the generator’s flexibility and its suitability for specific tasks. A 67 GHz limit, for instance, positions the device within the millimeter-wave spectrum, where wavelengths reduce to mere millimeters. These ultra-high frequencies are essential in cutting-edge fields like 5G and 6G wireless networks and cutting-edge scientific research, as they enable precise, high-resolution signal generation for testing and development at the forefront of technology.