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Metrology-grade performance for demanding applications
Keysight Pro XG7-class analog signal generators include the SG6311A, E8257D, and E8663D PSG signal generators for demanding calibration, research, and production test applications. The new Pro XG7 combines two independent RF channels in a compact 2U chassis with ultra-low phase noise and calibrated maximum output power up to +22 dBm. Across the portfolio, Pro signal generators provide frequency coverage up to 67 GHz, extendable to 1.1 THz, with signal generation from continuous wave (CW) tones to complex analog modulated signals. Choose one of our most popular configurations or build the one needed 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
20 GHz to 67 GHz
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Number of outputs
1 to 2
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Phase noise @1 GHz (20 kHz offset)
-153 dBc/Hz to -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
7000 µs to 11000 µs
Introducing the new Pro XG7
The new Pro XG7 analog signal generator provides dual-channel capability, ultra-low phase noise, and calibrated output power up to +22 dBm.
Key features:
- Dual channels with a shared internal reference clock
- Software-selectable modes for ultra-low phase noise or wide analog modulation deviation
- High, clean, calibrated output power to elimate the need for external amplifiers
- Backwards-compatible architecture lets you reuse automated test software and minimize documentation updates
Most popular configurations
XG7-class Analog Signal Generator
XG7-class Analog Signal Generator
Explore signal generator use cases
Signal generators support a wide range of applications, discover them all
Aerospace and Defense
How to Improve Radar System Sensitivity
Evaluate radar receiver performance by replacing or bypassing the internal LO with a controlled external source at the required frequency and level, then repeating the same measurement under identical conditions.
Wireless Communications
How to Test 6G Receivers with Low-Noise Signals
Generate clean signals for 6G receiver testing using a precision metrology-grade signal source.
Aerospace and Defense
Recreate direction-finding test conditions with phase-stable dual-channel analog signal generator.
Wireless Communication
Generate an RF carrier signal using a metrology-grade signal generator.
Wireless Communication
How to Establish a Metrology-Grade Reference for Calibration Labs
Establish a clean RF reference by generating a controlled signal with high-output power and low phase noise.
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Frequently Asked Questions
Start with the frequency range and signal level required at your device under test (DUT), including losses through cables, switches, and fixtures. Then evaluate phase noise, spurious signals, and output-level accuracy at your operating frequencies. Low phase noise and low spurious signals help prevent the source from obscuring device behavior.
Check the modulation capabilities, number of independent RF channels, and automation compatibility needed for your setup. Calibration applications emphasize accuracy and stability, while receiver testing may prioritize spectral purity and output power. Compare specifications under equivalent operating conditions, distinguishing warranted specifications from typical performance.
Low phase noise reduces unwanted noise around the carrier, helping you distinguish weak signals close to a stronger signal. Excessive source phase noise can mask device behavior and limit the measurement’s usable dynamic range.
A low-phase-noise generator helps reduce source-related limitations in receiver blocking tests, radar receiver evaluation, and local oscillator (LO) substitution. Evaluate phase noise at the carrier frequencies and frequency offsets relevant to your application. Also check spurious signals: these are discrete unwanted spectral components that can resemble or obscure DUT responses. Both affect your ability to identify what originates in the device.
The main differences are frequency coverage, channel count, output power, and size. The SG6311A Pro XG7 covers 9 kHz to 20 GHz with one or two independent RF channels in a compact 2U chassis. The E8257D is a single-channel generator with frequency options up to 67 GHz, extendable to 1.1 THz in selected bands with external frequency extenders, and higher output power of up to +30 dBm (1 W).
Consider the SG6311A for demanding low-noise measurements and compact dual-channel setups up to 20 GHz.
Consider the E8257D when you need higher frequency coverage or output power beyond the SG6311A’s capabilities.
Compare configured performance at your test frequencies before selecting either model.
You need higher output power when the source cannot deliver the required signal level at your DUT after test-path losses. Cables, switches, splitters, and fixtures all reduce the power reaching the device.
Benefits of higher output power
- Higher source power can help overcome those losses, provide the required LO drive, or generate strong signals for receiver blocking tests.
- It may also reduce the need for an external amplifier, simplifying the setup and avoiding additional amplifier noise or distortion.
How to choose
- Select the model and power option based on available calibrated output at your operating frequency.
- Check signal purity and level accuracy at the required output level, rather than relying only on the generator’s maximum power.
Pricing depends on the model and configuration, including frequency coverage, channel count, output-power options, and spectral-performance options. Calibration and support selections also affect the total price. A 67 GHz configuration therefore requires a quote for the specific instrument and options you need.
Select your preferred model on this page and choose Get Quote. Include your test application, frequency range, required signal level at the device, channel count, and any phase-noise or modulation requirements. These details help Keysight recommend a configuration and provide pricing for your setup.