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User Manual LW120
modulating waveform. The envelope frequency is bandwidth
limited, so make sure you are within the specified limits before you
apply this signal to the AM input connector.
AM Depth or Modulation Index – This term defines how far the
external generator can affect the main output signal.
The LW120 can be amplitude modulated from an external signal
only. This means that besides the carrier frequency, all other
parameters are supplied externally by the user. Therefore, make
sure that the signal that you apply to the AM input complies with the
specification requirements set forth in Appendix A.
Use the following procedure to turn on the AM function:
1. Press the UTILITY button
2. Select and press the Modulations option
3. Select and press the AM option
4. Select the press AM State CH1, or AM State CH2
5. Rotate the dial clockwise to turn the AM function ON
Connect the modulating signal to the rear-panel AM IN connector
and monitor the modulated waveform from the main outputs. Note
that AM has no effect on the SINE OUT signal.
Using The Instrument 3-39
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