Model 2090 Multi-Device Controller
UL
Compatibility:
1050, 1060
Description:
Queries the tower's upper limit. UL returns the limit associated with the
current polarization mode. 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.
This command is obsolete.
On the models
1050 and 1060, this command changed the front panel to display the upper
limit and prepared the controller to respond to all future reads with that limit.
This is not compatible with the IEEE 488.2 standard; the program
must
send
the UL command before each read. For programs which will not be used
with a model 1050 or 1060, use the UL? command.
Devices:
Towers
Syntax:
UL
Response:
[-]XXX[.X]
Value of the upper limit for the current polarization
in centimeters.
Example:
CALL ibwrt (TowerUD%, "UL")
' Query tower upper limit for
' current polarization
CALL ibrd (TowerUD%, rdbuf$)
' Read response
See Also:
UL 1090/2090, UL?
UL
Compatibility:
Description:
Devices:
Syntax:
-
' Change both the horizontal
UL 1050/1060, UL?
1090, 2090
Changes the upper limit of the device. The specified value must be greater
than the lower limit and between -999.9 and 999.9. This command effects
both the horizontal and vertical limits, simultaneously.
NOTE: Unlike editing
from the front panel, the Model 2090 allows setting the limit above the
current position from the GPIB.
Towers
UL [+/-] XXX[.X]
+
Optional for positive values
Necessary for negative values
XXX[.X]
Decimal value for the upper 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%, "UL 400")
' and vertical polarization
' upper limits of the tower to
' 400 cm.
See Also:
©ETS-Lindgren, April 2006
127
Revision G– P#399199
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