VXI VT1538A user manual SOURceFUNCtionRPULse, Parameters

SOURce:FUNCtion:RPULse

SOURce:FUNCtion:RPULse (@<ref_channel>),(@<ch_list>) links channels in <ch_list> to the rotational pulse function. The channel in <ref_channel> will be linked to the SENS:FUNC:RVEL function to provide the rotational reference information to SOUR:FUNC:RPUL.

Parameters

Parameter	Parameter	Range of	Default
Name	Type	Values	Units
ref_channel	string	100, 108, 116, 124, 132, 140, 148, 156	none
ch_list	string	100 - 163	none

Comments • <ref_channel> must be a single channel and must be the first channel on the SCP. The channel specified in <ref_channel> must be linked to the SENS:FUNC:RVEL function before the INIT command is received. See page 22 for more on RVEL. The related error messages are:

3111, "multiple channels are specified in reference channel list." 3112, "Channel specified is invalid for RPULse reference channel." 3119, "RPULse reference channel must be defined as RVELocity type."

•Channels in <ch_list> must be higher numbered and on the same SCP as the channel specified in <ref_channel>. The related error messages are:

3113, "Channel specified is not in same SCP as reference channel." 3114, "First channel in SCP can not be used in RPULse output channel list."

3118, "Incomplete setup information for RPULse function. "

Notes 1. There must be one (and only one) channel on the same SCP that is set to SENSe:FUNCtion:RVELocity. This sense channel provides the rotational velocity and index reference that the SCP uses to position the output pulses at a desired rotational angle. This is the <ref_channel> seen above.

2.The lower velocity limit for RPULse is 108 teeth per Second (TPS) for extra-tooth wheels, and 384TPS for missing-tooth wheels. For example, a 60 tooth wheel would need to rotate at a minimum of 108RPM if it had an extra tooth, but at 384RPM minimum with a missing tooth.

3.Long duration pulses that begin and end within a wheel’s missing tooth area can exhibit significant jitter. Use an extra tooth wheel for

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 65