Agilent N5181A/82A MXG Signal Generators User’s Guide 131
Adding Real Time Noise to a Signal (Option 403)
Adding Real-Time Noise to a Dual ARB Waveform
Use the following steps to modulate a 1 GHz, –10 dBm carrier with the factory- supplied waveform
SINE_TEST_WFM, and then apply 45 MHz bandwidth noise that has a 30 dB noise power
carrier–to–noise ratio across a 40 MHz carrier bandwidth.
1. Preset the signal generator and set the following:
• Frequency: 1 GHz
• Amplitude: −10 dBm
•RF output: on
2. Select the factory- supplied waveform SINE_TEST_WFM:
a. Press Mode > Dual ARB > Select Waveform.
b. Highlight SINE_TEST_WFM and press Select Waveform.
3. Turn on the dual ARB player: press ARB Off On to highlight On.
4. Set the ARB sample clock to 50 MHz: Press ARB Setup > ARB Sample Clock > 50 > MHz.
5. Press Real-time Noise Setup and set the following:
• Carrier to Noise Ratio: 30 dB
• Carrier Bandwidth: 40 MHz
• Noise Bandwidth: 45 MHz
• Real- time Noise: on
The signal generator’s displayed power level (–10 dBm) includes the noise power.
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