External Am Operation; Figure 2-16: External Am Operation (Waveform Multiplication); Table 2-4: Output Signal Amplitude Relative To External - Sony Tektronix VX4792 User Manual

External AM Operation

VX4792 User Manual
The EXT AM mode allows you to multiply (modulate) two waveforms and
produce the resultant waveform at the WAVEFORM OUTPUT connector. You
can use the OPERation command (page 3–61) to modulate a waveform in the
internal memory with a signal applied to the AM INPUT connector. The
modulating signal bandwidth (–3 dB) is DC to 4 MHz.
Figure 2–16 shows the output waveform that would result when multiplying the
two waveforms shown using EXT AM mode.
Waveform in memory
+2.5 V
-2.5 V
WAVEFORM OUTPUT connector
+2.5 V
-2.5 V

Figure 2-16: External AM Operation (Waveform Multiplication)

Table 2–4 shows the amplitude of the output signal relative to the external
modulation signal. 100% amplitude modulation occurs with "1 V input. When
the external modulation signal is greater than "1 V, the output signal can
become distorted.
Table 2-4: Output Signal Amplitude Relative to External Modulation Signal
External Modulation Signal
0 V
+1 V
-1 V
Functional Overview
AM INPUT connector
+1 V
-1 V
Output Signal Amplitude
50% of set value
100% of set value
0% of set value
2-17