Introducing the new SQG-series of high-frequency handsfree probes from Sensepeek, featuring a range of GHz probes designed for both AC and DC applications. This groundbreaking series enables engineers to perform repetitive measurements in the GHz range without the need for complex setups or soldering onto the measurement object.
With exceptionally low probe tip capacitance, the SQG-series minimizes signal distortion and prevents capacitive loading, making it ideal for sensitive circuits where maintaining signal integrity is crucial. Whether working in high-frequency environments measuring RF traces or handling fast data rates, these probes are engineered to manage high data rates while keeping your signals crisp and precise. Additionally, they offer an exceptionally flat frequency response, providing unparalleled accuracy across a wide frequency range.
Key Features of SQG15-AC
- Passive 10:1 probe optimized for use with any measurement instrument featuring a 50 Ω input impedance path or with a 50 Ω Feed-Through Termination, BNC Plug - BNC Socket
- Probe tip impedance of 500 Ω
- Usable data rate exceeding 3 Gbps, making it ideal for high-speed signal measurements
- Remarkably low probe tip capacitance of less than 1.36 pF, preventing capacitive loading
- Flat frequency response (+/- 0.5dB) from 1.0 kHz to 1.5 GHz
- Return loss for probed line, typically -26 dB to -11dB in the range 0 - 1.5 GHz
- The SQG15-AC is the ultimate affordable solution for engineers seeking precision and ease of use in high-frequency measurements
Instruments
The SQG-series is suitable for use with any measurement instrument featuring a 50 Ω input impedance, making them versatile across various applications, including:
- Oscilloscopes
- Sampling Oscilloscopes
- Network Analyzers
- Spectrum and Modulation Analyzers
- Receivers
- Power Meters
- Millivoltmeters
Unlike many other probes on the market, all performance data is delivered straight out of the box, eliminating the need for extra accessories or soldering attachments, saving you time and hassle.
The SQG-series includes exchangeable fine-pitch spring-tipped test needles, ensuring reliable contact with small or delicate components. The dual ground options, a dual needle ground with a 2.3mm tip pitch, perfect for PCB-mounted RF connectors, and a solid single ground with a 6.5mm tip pitch, designed for when ground points are farther away, make this probe adaptable to a wide variety of setups, offering flexibility no engineer should be without.
AC or DC Coupled Probe
Sensepeek provides both AC and DC-coupled probes, designed for engineers who need precise signal integrity across a wide range of applications. Low-impedance probes inherently load the signal being probed, slightly reducing its amplitude. In the case of signals with a DC bias, these probes may source or sink current from the signal source, potentially affecting the operating bias of sensitive devices.
AC-coupled probing is particularly advantageous when working with DC-biased data streams, such as those found in high-speed interfaces like USB, HDMI, and SATA, or differential signaling standards like ECL and PECL. AC-coupled probes are also ideal for examining small, high-frequency signals on supply lines or control circuits, critical for diagnosing issues such as power supply noise, current ripple, or decoupling inefficiencies.
Minimizing Signal Disruption in High-Frequency Probing
Probing microwave transmission lines presents a significant challenge, as adding conductor material can introduce capacitance and disrupt the line's geometry and impedance. This interference can lead to inaccuracies at the contact point.
However, by reducing the probe's loading effect and ensuring consistent performance across all relevant frequencies, the primary impact is a slight reduction in signal amplitude at the probe tip. Importantly, this reduction doesn't alter the waveform or its spectral content and phases.
By adjusting the probe or instrument gain, or scaling the measurement data, the small amplitude loss can be compensated for, ensuring precise and accurate measurements.
Compatibility with the PCBite-series
Both the length and weight of the SQG probes are perfectly balanced for use with PCBite holders, ensuring optimal performance for handsfree applications. The SQG-series probes are designed for superior stability with a low point of gravity, enhancing reliability. All probes are insulated and can be used handheld like traditional probes, but they truly excel when utilized in handsfree mode. Additionally, the probe and its accessories are delivered in a specially designed case for safe transport and storage. The SQG-series is the ideal solution for engineers looking for precision, stability, and ease of use in high-frequency measurements.
Whether you're troubleshooting power integrity problems or analyzing signal fidelity in high-speed digital designs, Sensepeek's range of AC and DC-coupled probes offers the versatility and precision that high-frequency and electronics engineers demand.