VXI 3002 - Manual (Page 46)

3-16
Amplitude modulation
These commands enable you to select amplitude modulation either as a single modulation or as the
sum of two signals, to set the AM depth as a percentage, and to switch the modulation on and off.
You can set the modulation oscillator frequency and select between sine, triangle and square
waveforms. Also the phase difference of modulation oscillator channel 2 relative to channel 1 can
be offset in degrees to a resolution of 0.1°. Both modulation depth and modulation oscillator
frequency can have their step sizes set and then be stepped up or down. And after having adjusted
the modulation depth or the modulation oscillator frequency you can either return to the reference
(depth or frequency) or make the current value the new reference.
AM or AM1 or AM2 Set AM Depth (short form)
:DEPTH Set AM Depth
:INC Set AM step size
Data type : Decimal Numeric Program Data
Allowed suffices : PCT
Default suffix : PCT
:<src> Select modulation source where <src> is any one of: INT, EXTAC,
EXTALC, or EXTDC
:ON Turn AM ON (locally)
:OFF Turn AM OFF (locally)
:UP Go UP one step
:DN Go DOWN one step
:RETN Return to original setting
:XFER Transfer current value to be the new setting
Data type : None
Allowed suffices : None
Default suffix : None
Examples: AM:DEPTH 30.5PCT;EXTAC;ON
AM1:DEPTH 40PCT;INT;OFF
:MODF Set AM modulation oscillator frequency (short form)
:VALUE Set AM modulation oscillator frequency
:INC Set AM modulation oscillator frequency step size
Data type : Decimal Numeric Program Data
Allowed suffices : Any one of: GHZ, MHZ, KHZ or HZ
Default suffix : HZ
:UP Go UP one step
:DN Go DOWN one step
:RETN Return to original setting
:XFER Transfer current value to be the new setting
:SIN Select sinusoidal waveform
:TRI Select triangle waveform
:SQR Select square waveform
Data type : None
Allowed suffices : None
Default suffix : None
:PHASE Set phase offset of AM2 relative to AM1
Examples: AM2:MODF:VALUE 15.5KHZ;TRI;INC 500HZ
AM:MODF:PHASE 5DEG