How to Simulate Multiple Signals for EMSO Testing

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Pro Vector Signal Generator
+ Pro Vector Signal Generator
Pro Vector Signal Generator
+ Pro Vector Signal Generator

Configure Simultaneous RF Stimulus Conditions

Electromagnetic Spectrum Operations (EMSO) receiver testing can use a composite radio-frequency (RF) stimulus comprising several independently defined signals. Configure the target RF center frequency and the frequency offsets, levels, phase settings, and modulation formats of the individual signals. Establish the receiver input path, account for cable and fixture losses, and verify the aggregate delivered power before applying the stimulus. Each virtual signal generator contributes to the combined RF output, allowing the test operator to establish a repeatable multi-signal spectrum without requiring a separately cabled source for every signal. Review the receiver's specified operating limits and use the calibrated stimulus settings to create controlled receiver interference testing conditions. Record the baseline receiver response before introducing level or frequency changes.

For multiple RF signal generation, begin with a reference signal and add additional virtual signals one at a time to isolate receiver responses to simultaneous spectral occupancy. Vary the frequency separation, per-signal attenuation, or signal state while observing response metrics available from the receiver under test, such as demodulation quality, detection behavior, or reported sensitivity. A spectrum analyzer can be used to verify the resulting composite spectrum, but its availability and model selection are separate from the source-based product list. If testing requires coordinated RF channels, establish common triggering and document timing relationships for each measurement run. Capture the configured virtual signal settings, the composite output spectrum, and corresponding receiver data to make RF receiver validation conditions reproducible across repeated trials and configuration changes.

Multi-Signal EMSO Receiver Test Solution

Simultaneous RF testing requires a composite stimulus with independently adjustable frequency, power, phase, and modulation settings. Keysight Pro vector signal generator supplies eight virtual signal generators per RF output, according to the selected Keysight application-note asset page. Its direct digital synthesis (DDS) architecture generates multiple signal components without a conventional in-phase/quadrature modulator in this path. Engineers can configure and modify virtual signal state, attenuation, trigger delay, phase, and modulation to develop repeatable Electromagnetic Spectrum Operations (EMSO) testing scenarios. Multiple RF signal generation can support receiver interference testing by placing several intended or interfering signals within a controlled spectrum. A compatible signal analyzer may be used to observe composite output; receiver-specific instrumentation is selected to suit the device under test.
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How to Simulate Multiple Signals for EMSO Testing

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