N5531S Measuring Receiver

The Keysight N5531S measuring receiver system is comprised of a PSA spectrum analyzer with Option 233, a P-Series or EPM Series power meter, and an N5532B/A1 sensor module for metrology and calibration applications. To achieve the optimal measurement results as specified, the best metrology practice must be applied and the required instrument conditions must be met.

PSA is the core component instrument of the N5531S measuring receiver. The PSA instrument conditions included in the PSA specification guide must be met to meet the N5531S specifications.

Additional conditions required to meet specifications

The system components are within their calibration cycle

Tuned RF Level measurement is set to High Accuracy Mode

Fast Mode is set to Off when performing modulation measurements

For center frequency < 20 MHz, DC coupling is applied

At least 2 hours of storage or operation at the operating temperature of 20 to 30 °C

The PSA has been turned on at least 30 minutes with Auto Align On selected or if Auto Align Off is selected, Align All Now must be run:Within the last 24 hours, and

Any time the ambient temperature changes more than 3 °C

After the analyzer has been at operating temperature at least 2 hours

For analog modulation measurements, a direct connection between the PSA and the device under test (DUT) is required to achieve the best performance and meet the specifications for all test frequencies

The following PSA options are required in addition to Option 233 as stated in the specifications:Option 123 (pre-selector bypass) must be installed to meet TRFL specifications above 3 GHz

Option 107 (audio input 100 kΩ) is required with Option 233 (built-in measuring receiver personality) for the audio analysis

Option 1DS (pre-amplifier between 100 kHz and 3.05 GHz) or Option 110 (pre-amplifier between 10 MHz up to 50 GHz) is needed to achieve better sensitivity as indicated in the data sheet

Key features:

• Metrology-grade measurement accuracy
• Off-the-shelf, general-purpose instruments with specialized PSA measurement personality
• Best for signal source and step attenuator calibrations
• Abundant features with easy-to-use user interfaces
• Sensor modules covering up to 50 GHz with single input connection

Key measurements include:

• Frequency counter
• Absolute RF power
• Tuned RF level
• TRFL with tracking
• AM depth
• FM deviation
• oIM deviation
• Modulation rate
• Modulation distortion
• Modulation SINAD
• Audio frequency
• Audio AC level
• Audio distortion
• Audio SINAD
• Auto carrier triggering
• CCITT filters