L I B R A R Y F U N C T I O N S
Data Device Corporation
SB-3624XIX-3L0 Manual
www.ddc-web.com
Rev D -10/15
66
void WINAPI Program_Amplitude (int Card, int Amplitude)
DESCRIPTION
This routine allows the user to change the amplitude of the oscillator. Since there is only one
oscillator on the card, the channel does not have to be selected.
INPUT DATA
Card = an integer between 0 and 7 for the card of interest. The card number is set in the Motion
Feedback Board Manager.
Amplitude = an integer between 0 and 255 that corresponds to a bit multiplier. The product of the bit
multiplier and the output scaling represents the true amplitude.
To change the Oscillator amplitude, enter the bit multiplier. The bit multiplier, which is an integer, is
determined by the following formula:
Amplitude = (bit multiplier) X (mV/bit)
Model
Number
Output Scaling
(mV/bit)
Examples
Bit
Multiplier
Resultant
Amplitude
Bit
Multiplier
Range
IX
8.8 mVrms/bit
1.0032 Vrms = (114) X (.0088)
114
1.0032 Vrms
0 - 255
IA
135.0 mVrms/bit
26.0550 Vrms = (193) X (.135)
193
26.0550 Vrms
0 - 255
IB
635.0 mVrms/bit
115.5700 Vrms = (182) X (.635)
182
115.5700 Vrms
0 - 210
*IC
17.6 mVrms/bit
4.0128 Vrms = (228) X (.0176)
228
4.0128 Vrms
0 - 255
* Note: Consult factory for IC option (minimum orders apply)
Amplitude = (Bit Multiplier) X (mVrms/bit)
Amplitude = (114) * (8.80 mVrms/bit)
Amplitude = 1.0032 Vrms
RETURNED DATA
This routine does not return any data.
EXAMPLE CODE
Code
Result/Returned Data
Program_Amplitude(7,193);
Assuming card #7 is a model type IA (135.0
mv/bit), the oscillator amplitude of card #7 will be
set to 26.0550 V.
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