Table 5-4 Db Commands - Keithley 2701 User Manual

Model 2701 User's Manual
NOTE
Table 5-4
dB commands
Commands
DCV dB commands
UNITs:VOLTage[:DC] <name>
UNITs:VOLTage[:DC]:DB:REFerence <n>
ACV dB commands
UNITs:VOLTage:AC <name>
UNITs:VOLTage:AC:DB:REFerence <n>
Channel list parameter:
<clist> = (@SCH)
where: S = Mainframe slot number (1 or 2)
CH = Switching module channel number (must be 2 digits)
Examples: (@101) = Slot 1, Channel 1
(@101, 203) = Slot 1, Channel 1 and Slot 2, Channel 3
(@101:110) = Slot 1, Channels 1 through 10
* The <clist> parameter is used to configure one or more channels for a scan. Each channel in the <clist> must be set to the function
specified by the rel (reference) command. If not, a conflict error (-221) will occur. For example, UNITs:VOLTage:AC dB, (@101)
is only valid if scan channel 101 is set for the ACV function.
Programming examples — dB
Example #1 — The following command sequence configures the Model 2701 to perform
DCV dB measurements. A 1V input will be measured as 0dB.
FUNC 'VOLT'
UNIT:VOLT DB
UNIT:VOLT:DB:REF 1
Example #2 — The following command sequence configures channels 101 and 105 of the
Model 7700 to perform ACV dB measurements when they are scanned. A 10V input will
be measured as 0dB.
FUNC 'VOLT:AC',(@101,105)
UNIT:VOLT:AC DB,(@101,105)
UNIT:VOLT:AC:DB:REF 10
Queries are not included in
Table 15-10.
*
Select DCV measurements; <name> = V or DB.
Set reference in volts; <n> = 1e-7 to 1000.
Select ACV measurements; <name> = V or DB.
Set reference in volts; <n> = 1e-7 to 1000.
Rel, Math, Ratio, Channel Average, dB
Table 5-4. All the dB commands are provided in
Description
' Select DCV function.
' Select DCV dB.
' Set dB reference to 1V.
' Set 101 and 105 for ACV.
' Set 101 and 105 for dB.
' Set 101 and 105 for 10VAC dB
reference.
5-21
Def
V
1
V
1