HP 8163A User Manual page 77

Figure 3-9
Power Measurement
How to Measure Power
If the measured power is more than 3dBm greater than the range
setting, it is impossible for power to be displayed. The power value,
+1.--- dBm, as shown in Figure 3-9, is shown. This means that
the measured power is greater than the Upper Power Limit. You
must decrease the [R
See Table 3-1 on page 80 for more details.
Out of Range - Power Greater Than Upper Power Limit
77
] value.
ANGE