ETS-Lindgren 2090 Controller - Manual (Page 114)

Appendix A: Model 2090 GPIB Command Reference Model 2090 Multi-Device Controller
LH?
Compatibility: 1090, 2090
Description: Queries the lower limit of the device for horizontal 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: LH?
Response: [-]XXX[.X] Value of the lower limit for horizontal polarization in
centimeters.
Example: CALL ibwrt (TowerUD%, "LH?") ' Query horizontal lower limit
CALL ibrd (TowerUD%, rdbuf$) ' Read response
See Also: LH
LL
Compatibility: 1050, 1060
Description: Queries the tower's lower limit. LL returns the limit associated with the
current polarization mode. The value returned is either in N1 (XXX) or N2
(XXX.X) format depending upon the current numeric mode. Negative values
are preceded by a "-" minus sign. This command is obsolete. On the models
1050 and 1060, this command changed the front panel to display the lower
limit and prepared the controller to respond to all future reads with that limit.
This is not compatible with the IEEE 488.2 standard; the program must send
the LL command before each read. For programs which will not be used with
a model 1050 or 1060, use the LL? command.
Devices: Towers
Syntax: LL
Response: [-]XXX[.X] Value of the lower limit for the current polarization
in centimeters.
Example: CALL ibwrt (TowerUD%, "LL") ' Query tower lower limit for
' current polarization
CALL ibrd (TowerUD%, rdbuf$) ' Read response
See Also: LL 1090/2090, LL?
114 © ETS-Lindgren– April, 2006
Revision G– P# 399199