User Manual

Modulation Function
Use the Mod key to generate modulated waveforms. The 4060B Series can generate AM, FM, ASK, FSK, PSK, PM,
PWM and DSB-AM modulated waveforms. Modulating parameters vary with the types of the modulation. In AM,
users can set the source (internal/external), depth, modulating frequency, modulating waveform and carrier. In DSB-
AM, users can set the source (internal/external), modulating frequency, modulating waveform and carrier. In FM, users
can set the source (internal/external), modulating frequency, frequency deviation, modulating waveform and carrier.
In PM, users can set the source (internal/external), phase deviation, modulating frequency, modulating waveform and
carrier. In ASK, users can set the source (internal/external), key frequency and carrier. In FSK, users can set the source
(internal/external), key frequency, hop frequency and carrier. In PSK, users can set the source (internal/external), key
frequency, polarity and carrier. In PWM, users can set the source (internal/external), modulating frequency, width/duty
cycle deviation, modulating waveform and carrier.
We will introduce how to set these parameters in details according to the modulation types.
9.1 AM
The modulated waveform consists of two parts: the carrier and the modulating waveform. In AM, the amplitude of the
carrier varies with the instantaneous voltage of the modulating waveform.
Press Mod → Type → AM, the parameters of AM modulation are shown in Figure 9.1.
Function Explanation
Type AM Amplitude modulation
Source Internal The source is internal
External The source is external. Use the [Aux In/Out] connector at the rear panel.
AM Depth Set the modulation depth.
Shape Sine Choose the modulating waveform.
Square
Triangle
UpRamp
DnRamp
Noise
Arb
AM Freq Set the modulating waveform frequency. Frequency range: 1mHz~1MHz (internal source
only).
Figure 9.1 Setting Interface of AM Modulation