2
General Power Meter Functions
110
N1911A/1912A P-Series Power Meters User’s Guide
Zero/Cal Lockout
The Zero/Cal Lockout facility can help you make sure that a measurement
cannot be made until the power meter and sensor combination has been
zeroed and calibrated.
When the Zero/Cal Lockout facility is enabled and a sensor is initially
connected, the message
Please Zero and Cal
is displayed.
Figure 2-89
Please zero and calibrate window
When you zero the sensor the message changes to
Please Cal
. If you
calibrate the sensor before zeroing it, the message changes to
Please Zero
.
Dual channel meters display channel specific messages when a sensor is
connected. The Zero/Cal Lockout configuration is applied to both channels
- it cannot be applied to one channel only.
You can enable and disable the Zero/Cal Lockout facility from the System
menu or the Cal menu as follow:
Press ,
,
or
.
Similarly,
press ,
,
or
.
1 of 2
Must Cal Off
On
1 of 2
Must Cal Off
On
