VXI VT1538A Variable Angular Position, Preset Pulse Width by time, Rotational Pulse Mode

sense rvel for reference channel

Figure 21. Variable Position, Width Preset by Angle

Rotational Pulse Mode:

Variable Angular Position, Preset Pulse Width (by time)

In this mode, the angular position of the pulses is controlled by the algorithm, and the width (duration in seconds) is preset before INIT. See Figure 22. Use the following command sequence:

SOURce:FUNCtion:RPULse (@<ref_channel>),(@<ch_list>) to select the channels that will output angular positioned pulses, and to specify the reference channel.

SOURCe:RPULse:WIDTh:TIME <seconds>,(@<ch_list>) to preset the pulse width in seconds. The algorithm will control the angular pulse position.

Example of variable position, preset width:

Set up channel 40 as the reference channel, and channels 45 through 47 to output variable position pulses:

*RST

SENS:FUNC:RVEL 12,MISS,(@140)

SOUR:FUNC:RPULSE (@140),(@145:147) 3 rotational pulse output chans SOUR:RPULSE:WIDT:TIME .001,(@145:147)preset pulse width to 1 millisec.

Algorithm outputs pulses on all three channels with variable position.

ALG:DEF ’ALG1’,’static float Pos1, Pos2, Pos3;O145 = Pos1; O146 = Pos2; O147 = Pos3;’

ALG:SCALAR’ALG1’,’Pos1’,60	preset ch 45’s pulse pos to 60°
ALG:SCALAR’ALG1’,’Pos2’,180	preset ch 46’s pulse pos to 180°

32 Agilent E1538A Enhanced Frequency/Totalize/PWM SCP