Agilent 33120A User's Guide

Chapter 3 Features and FunctionsFrequency-Shift Keying (FSK) ModulationFSK “Hop” Frequencyœ Hop frequency: 10 mHz to 15 MHz (100 kHz for triangle and ramp).The default is 100 Hz. You can use sine, square, ramp, triangle, orarbitrary waveforms for the hop frequency waveshape.œ For arbitrary waveforms, the maximum hop 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 kHzœ 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: After enabling FSK, press Recall Menu to godirectly to the FSK FREQ command in the menu.8: FSK FREQ (MOD MENU)œ Remote Interface Operation:FSKey:FREQuency {|MINimum|MAXimum}92