RIGOL DG1000Z Series - Manual (Page 91)

Chapter 2 Front Panel Operations RIGOL
DG1000Z User’s Guide 2-41
To Set Modulating Waveform Frequency
When internal modulation source is selected, press FM Freq to set the modulating
waveform frequency.
 Input the desired frequency value using the numeric keyboard or direction keys
and knob.
 The modulating waveform frequency ranges from 2mHz to 1MHz, and the
default value is 100Hz.
Note: when external modulation source is selected, this menu will be grayed out and
disabled.
To Set Frequency Deviation
Frequency deviation is the deviation of the modulating waveform frequency relative
to the carrier frequency. Press FM Dev to set the FM frequency deviation.
 Frequency deviation must be lower than or equal to the carrier frequency.
 The sum of frequency deviation and carrier frequency must be lower than or
equal to the sum of the current carrier frequency upper limit and 1kHz.
Note: if Sine is selected currently as the carrier waveform, the carrier amplitude will
be limited at 2Vpp when the sum of the frequency deviation and the carrier
frequency is greater than the frequency upper limit of the current carrier.
When external modulation source is selected, the frequency deviation is controlled
by the ±5V signal level of the [CH1/Sync/Ext Mod/Trig/FSK] connector at the
rear panel. Positive signal level corresponds to frequency increase and negative
signal level corresponds to frequency decrease. For example, if the frequency
deviation is set to 1 kHz, +5V signal level corresponds to a 1kHz increase of
frequency and -5V signal level corresponds to a 1kHz decrease of frequency.