Chapter 6, COMPUTER OPERATION 
6-21 
n  Function 
0  Oscillator amplitude/frequency modulation disabled 
1  Oscillator amplitude modulation enabled 
2  Oscillator frequency modulation enabled 
AMCENTERV[.] [n]   Oscillator amplitude modulation center voltage command 
The value of n sets the oscillator amplitude modulation center voltage; in fixed point 
mode n is an integer in the range -10000 to +10000, corresponding to voltages from -
10.000 V to +10.000 V, and in floating point mode it is in volts. 
Note: The span voltage plus the center voltage cannot exceed 
10.000 V 
AMDEPTH [n]   Oscillator amplitude modulation depth control 
The value of n sets the oscillator amplitude modulation depth in percent, from 0 to 
100 
AMFILTER [n]  Oscillator amplitude modulation filter control command 
The value of n sets the oscillator amplitude modulation voltage low-pass filter 
control in the range 0 to 10. The value of 0 gives the widest bandwidth for this filter, 
with the value of 10 the lowest. 
AMSOURCE [n]  Oscillator amplitude modulation voltage source command 
The value of n selects the source of signal used to modulate the oscillator amplitude 
in accordance with the following table: 
n  Function 
0  ADC 1 input 
1  Signal from external reference channel 
AMVSPAN[.] [n]  Oscillator amplitude modulation voltage span command 
The value of n sets the oscillator amplitude modulation span voltage; in fixed point 
mode n is an integer in the range 0 to +10000, corresponding to a range from 
0.000 V to 10.000 V, and in floating point mode it is in volts. 
Note: The span voltage plus the center voltage cannot exceed 
10.000 V 
FMCENTERF[.] [n]   Oscillator frequency modulation center frequency command 
In fixed point mode n sets the oscillator frequency modulation center frequency in 
mHz. The range of n is 0 to 120000000 or 250000000 representing 0 to 120.0 or 
250.0 kHz; in floating point mode n sets the center frequency in the range 0 to 1.2E5 
or 2.5E5 
Note: The span frequency plus the center frequency cannot exceed 120.0 or 
250.0kHz; the center frequency must also be greater than the span frequency. 
FMCENTERV[.] [n]   Oscillator frequency modulation center voltage command 
The value of n sets the oscillator frequency modulation center voltage; in fixed point 
mode n is an integer in the range -10000 to +10000, corresponding to voltages from -
10.000 V to +10.000 V, and in floating point mode it is in volts. 
Note: The span voltage plus the center voltage cannot exceed 
10.000 V 
FMFILTER [n]  Oscillator frequency modulation filter control command 
The value of n sets the oscillator frequency modulation voltage low-pass filter