Teledyne LeCroy DA1855A - Manual (Page 52)

DA1855A Differential Amplifier
46 922258-00 Rev A
Remote Control Commands
When attached to a Teledyne LeCroy oscilloscope equipped with ProBus interface, the DA1855A
Amplifier can be remotely controlled along with the other oscilloscope functions. The control
interface can be either the RS-232 or IEEE-488 (GPIB) bus. The commands which control the
amplifier are described below. The text for the command descriptions is formatted in a style
consistent with the oscilloscope command descriptions contained in the Teledyne LeCroy Digital
Oscilloscopes Remote Control Manual supplied with the oscilloscope. Please refer to this manual for
additional information on the remote control buses and the conventions used in the command
descriptions.
Many of the commands begin with the “PRx:” prefix, where “x” is the channel which the DA1855A
amplifier is connected to. These commands are similar to the channel commands which use the
prefix “Cx:”. The difference being that the “PRx:” form refers to the probe tip, whereas the “Cx:”
form refers to the oscilloscope input connector. For example, “PRx:VDIV” sets the Volts per
division at the probe tip, while “Cx:VDIV” sets the Volts per division at the BNC input connector,
without factoring the gain or attenuation factor of DA1855A amplifier and attached probes. The
“PRx:” form of these commands are only active when the DA1855A amplifier is connected to the
selected channel. An error will result when an DA1855A specific command is sent to the oscilloscope
without a differential probe attached to the selected channel.
Command List
PRx:ATTENUATION Selects the input attenuation of the amplifier.
PRx:AUTOZERO
Initiates an auto zero cycle in the amplifier.
PRx:BWL
Selects the upper bandwidth limit.
PRx:COUPLING
Selects the input coupling of the + and – inputs.
PRx:GAIN Selects the gain of the amplifier
PRx:OFFSET Selects the Precision Voltage Generator voltage.
PRx:PINPUTR Selects the input resistance of both inputs.
PRx:PROBEATTENUATION? Reports the attenuation of the passive probe attached to the
amplifier
PRx:PVGMODE Selects the Precision Voltage Generator Offset mode.
PRx:VDIV Selects the vertical scale factor of the
probe/amplifier/oscilloscope system.