HP Cable Box 8591C manual Measuring Modulation In Zero Span

Making Basic Measurements Using Spectrum Analyzer Mode

Using the Analyzer As a Receiver in Zero Frequency Span

3.To demodulate the AM, press (BW). Increase the resolution bandwidth to include both sidebands of the signal within the passband of the spectrum analyzer.

4.Next, position the signal peak near the reference level and select a linear voltage display. Press (AMPLITUDE_) and change the reference level, then press SCALE LOG LIN to underline LIN.

5.To select zero span, either press (SPAN), 0 (Hz) or press ZERO SPAN See Figure 4-26. If the modulation is a steady tone (for example, from a signal generator), use video trigger to trigger on the waveform and stabilize the display. Adjust the sweep time to change the horizontal scale.

Use markers and delta markers to measure time parameters of the waveform.

NEXT PK

RIGHT

Figure 4-26. Measuring Modulation In Zero Span

4 - 3 9