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How to create an ASK source in hspice?

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hspice fm source function

I want to simulate a ASK singnal using hspice, but I can't find the way to create such an ASK signal. Please help me, thanks a lot!

Added after 38 minutes:

I have found one way:

Code: 
Vpulse v1 0 pulse(0 1 0 1n 1n 100n 200n)
Vsin v2 0 sin(0 1 100MEG) 
Eout out 0 VOL='V(v1)*V(v2)'
 

hspice ask amplitude

Amplitude Modulation Source Function
The general syntax for including a single-frequency, frequency-modulated
source in an independent voltage or current source is:
Syntax
Vxxx n+ n- AM < (> sa oc fm fc <td> <)>
or
Ixxx n+ n- AM < (> sa oc fm fc <td> <)>
The arguments are:
Vxxx, Ixxx Independent voltage source, which exhibits the amplitudemodulated
response.
AM Keyword for an amplitude-modulated, time-varying source.
sa Signal amplitude, in volts or amps. Default=0.0.
fc Carrier frequency, in hertz. Default=0.0.
fm Modulation frequency, in hertz. Default=1/TSTOP.
oc Offset constant, a unitless constant that determines the absolute
magnitude of the modulation. Default=0.0.
td Delay time before the start of the signal, in seconds. Default=0.0.

Example:

V1 1 0 AM(10 1 100 1K 1M)
 

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