ETS-Lindgren 2090 Controller - Manual (Page 118)

Appendix A: Model 2090 GPIB Command Reference Model 2090 Multi-Device Controller
PH
Compatibility: All
Description: Instructs a tower to change its boom polarization to horizontal.
Devices: Towers
Syntax: PH
Example: CALL ibwrt (TowerUD%, "PH") ' Change boom polarization
' to horizontal
See Also: P?, PV
PV
Compatibility: All
Description: Instructs a tower to change its boom polarization to vertical.
Devices: Towers
Syntax: PV
Example: CALL ibwrt (TowerUD%, "PV") ' Change boom polarization
' to vertical
See Also: P?, PH
P?
Compatibility: All
Description: Queries the polarization of the tower boom. A single digit value of "1" is
returned if in the horizontal position. Otherwise a value of "0" is returned for
vertical polarization. On the models 1050 and 1060, this command prepared
the controller to respond to all future reads with the polarization. This is not
compatible with the IEEE 488.2 standard; the program must send the P?
command before each read.
Devices: Towers
Syntax: P?
Response: Value indicating the polarization setting of the
queried device.
1 Horizontal
0 Vertical
Example: CALL ibwrt (TowerUD%, "P?") ' Query twr boom polarization
CALL ibrd (TowerUD%, rdbuf$) ' Read response
See Also: PH, PV
RTL
Compatibility: 1090, 2090
Description: Causes the device to return to local mode.
Devices: Towers, Turntables
Syntax: RTL
Example: CALL ibwrt (TowerUD%, "RTL") ' Return tower controller to
' local control
118 © ETS-Lindgren– April, 2006
Revision G– P# 399199