VXI VT1509A, User Manual, Page: 7 / 12

·
The channel parameter must specify a single channel.
To query the filter state of channel 2 send
INP:FILT? (@102)
query channel 2
enter statement here
Querying the
Channel Gain
While the VT1509A’s amplifiers have fixed gain, the channel gain can be
queried. The response to this query will always be 64. To query any channel
to determine its gain setting use the INPut:GAIN? (@<channel>) command.
The INP:GAIN? command returns the current gain value for the specified
channel.
·
The channel parameter must specify a single channel.
To query the gain setting of channel 8 send
INP:GAIN? (@108)
query channel 8
enter statement here
Detecting Open
Transducers
This SCP provides a method to detect open transducers. When Open
Transducer Detect (OTD) is enabled, the SCP injects a small current into
the HIGH and LOW input of each channel. The polarity of the current pulls
the HIGH inputs 17 volts and the LOW inputs towards -17 volts. If
a transducer is open, measuring that channel will return an over-voltage
condition. OTD is available on a per SCP basic. all eight channels of an
SCP are enabled or disabled together. See Figure 5 for a simplified
schematic diagram of the OTD circuit.
Programming With SCPI Commands VT1509A Fixed Amplifier SCP 7
Signal Conditioning Plug-on
Multiplexer
Signal Input
High
Low
100M
-17V
3K
Gnd.
3K
100M
+17V
High
Low
Figure 5 Open Transducer Detect Circuit