Agilent 33120A User's Guide

Chapter 3 Features and FunctionsFrequency-Shift Keying (FSK) ModulationFSK Carrier Frequencyœ Carrier frequency: 10 mHz to 15 MHz (100 kHz for triangleand ramp). The default is 1 kHz. You can use sine, square, ramp,triangle, or arbitrary waveforms for the carrier waveform.œ For arbitrary waveforms, the maximum carrier frequency depends onthe number of points specified in the waveform. The five built-inarbitrary waveforms can be output at a maximum of 5 MHz.Number of Arb Points8 to 8,192 (8k)8,193 to 12,287 (12k)12,288 to 16,000Minimum Frequency10 mHz10 mHz10 mHzMaximum Frequency5 MHz2.5 MHz200 kHz3œ For an externally-controlled FSK waveform, the carrier frequency isoutput when a “low” TTL level is applied to the FSK terminal. The hopfrequency is output when a “high” TTL level is applied.œ For FSK, the sync signal is referenced to the FSK “hop” signal (not thecarrier). A momentary TTL “high” pulse (> 200 ns) is output on thetransition to the “hop” frequency. The signal is output from the frontpanelSYNC terminal.œ Front-Panel Operation: Press the Freq key and select any validfrequency for the selected function (the present amplitude and offsetvoltage are used).œ Remote Interface Operation:FREQuency {|MINimum|MAXimum}You can also use the APPLy command to select the function, frequency,amplitude, and offset of the carrier with a single command.91