Appendix A: Model 2090 GPIB Command Reference
Model 2090 Multi-Device Controller
LV
Compatibility:
1090, 2090
Description:
Changes the lower limit of the device for vertical polarity. The specified
value must be less than the upper limit for the vertical polarization and
between -999.9 and 999.9. Note that, unlike editing from the front panel, the
2090 allows setting the limit above the current position from the GPIB.
Devices:
Towers
Syntax:
LV [+/-] XXX[.X]
+
Optional for positive values
-
Necessary for negative values
XXX[.X]
Decimal value for the lower limit to be set in
centimeters.
In N1 mode .X is ignored
In N2 mode .X is optional.
Leading zeros are optional.
Example:
CALL ibwrt (TowerUD%, "LV 95")
' Set vertical polarity lower
' limit to 95 cm
See Also:
LV?
LV?
Compatibility:
1090, 2090
Description:
Queries the lower limit of the device for vertical polarity. The value returned
is either in N1 (XXX) or N2 (XXX.X) format depending upon the current
numeric mode. Negative values are preceded by a "-" minus sign.
Devices:
Towers
Syntax:
LV?
Response:
[-]XXX[.X]
Value of the lower limit for the vertical polarization
in centimeters.
Example:
CALL ibwrt (TowerUD%, "LV?")
' Query vertical lower limit
CALL ibrd (TowerUD%, rdbuf$)
' Read response
See Also:
LV
N1
Compatibility:
2090
Description:
Places the controller in the backward compatible numeric mode 1. This mode
provides a GPIB readout accuracy of 3 (XXX) digits. Fractional numbers are
rounded to the nearest integer prior to reporting them over the GPIB.
Fractional numbers received by the 2090 are truncated. This is the default
mode of operation for the 2090. This setting has no effect on the 2090's
internal or display accuracy. This command is global, changing the numeric
mode of both primary devices.
Devices:
Towers, Turntables
Syntax:
N1
Example:
CALL ibwrt (TowerUD%, "N1")
' changes numeric mode of
' the tower to 1050/1060/1090
' compatibility.
See Also:
N2
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© ETS-Lindgren– April, 2006
Revision G– P# 399199
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