What can be used alongside a signal level meter (SLM) to check RF continuity at sub-band frequencies?

A signal generator is an essential instrument used alongside a signal level meter (SLM) to check RF continuity at sub-band frequencies. The signal generator produces a known RF signal that can be injected into the system. By doing so, you can assess whether that signal travels through the components of the RF system without degradation or loss, which is crucial for ensuring proper functionality.

When used in conjunction with the SLM, the signal generator provides a reliable diagnosis capability. The SLM then measures the strength of the signal that has passed through the system, which helps confirm whether the RF path is intact and functioning correctly.

While other instruments such as a multimeter, power meter, and oscilloscope have specific uses in electronics and RF testing, they are not designed primarily for generating RF signals for the purpose of checking continuity like a signal generator is. A multimeter primarily measures voltage, current, and resistance rather than RF signals. A power meter measures the power in RF systems, which is also not focused on continuity. An oscilloscope visualizes waveforms but does not generate RF signals from scratch.