This application Note (By Keysight) will help you to
Improve Measurement Accuracy in Each Test Setup
balance the Tradeoffs when Setting Resolution Bandwidth
Increase Sensitivity When Measuring Low-Level Signals
Optimize Dynamic Range when Measuring Distortion
Accurately Isolate and Measure Bursts and Transients
Enhance Speed, Accuracy, Reliability with Measurement Applications
Identify Internal Distortion Products
Find and Measure Elusive Signals using Real-Time Analysis

Signal sources provide precise, highly stable test signals for a variety of component and system test applications. Signal generators add precision modulation capabilities, and are used to simulate system signals for receiver performance testing. This guide, By Keysight, helps you improve the accuracy of your measurements that involve using RF signal sources. You may increase the accuracy of your data by using more than one of the hints in your test setup

The spectrum analyzer, like an oscilloscope, is a basic tool used for observing signals. Where the oscilloscope provides a window into the time domain, the spectrum analyzer provides a window into the frequency domain. To get better spectrum analyzer measurements the input signal must be undistorted, the spectrum analyzer settings must be wisely set for application-specific measurements, and the measurement procedure optimized to take best advantage of the specifications. More details on these steps will be addressed in Keysight hints guide.
Hint 1. Selecting the Best Resolution Bandwidth RBW
Hint 2. Improving Measurement Accuracy
Hint 3. Optimize Sensitivity When Measuring Low-level Signals
Hint 4. Optimize Dynamic Range When Measuring Distortion
Hint 5. Identifying Internal Distortion Products
Hint 6. Optimize Measurement Speed When Measuring Transients
Hint 7. Selecting the Best Display Detection Mode
Hint 8. Measuring Burst Signals: Time Gated Spectrum Analysis

Many coaxial connector types are available in the RF and microwave industry, each designed for a specific purpose and application. The following is a brief review (By Keysight) of common connectors used in test and measurement applications