Measurement Accuracy And Speed; Setting The Range; Table 2-1 Sensor Ranges - Agilent Technologies U2000H Operating And Service Manual

2 Making Measurements

Measurement Accuracy and Speed

With U2000 Series USB power sensors, the range can be set either
automatically or manually. Use auto- ranging when you are not sure of the
power level you are about to measure.
The DC coupling of the U2004A USB power sensor input allows excellent low
frequency coverage. However, the presence of any DC voltages mixed with the
signal will have an adverse effect on the accuracy of the power measurement,
see
To prevent damage to your sensor, do not excess the power levels specified in the
C A U T I O N
section
The U2004A USB Power Sensor is DC coupled. DC voltages in excess of the maximum
value (5 VDC) can damage the sensing diode.

Setting the Range

There are two manual settings, "LOWER" and "UPPER". The LOWER range
uses the more sensitive path and the UPPER range uses the attenuated path in
the U2000 Series USB power sensors (see

Table 2-1 Sensor Ranges

The default is "AUTO". In AUTO the range crossover value depends on the
sensor model being used (see
24
on Page 46.
"Maximum Power"
Sensor
U2000A, U2001A, U2002A, U2004A
U2000H, U2001H, U2002H
U2000B, U2001B
on page 42.
Table 2-
LOWER range
– –
60 dBm to
–50 dBm to 0 dBm
–30 dBm to +20 dBm
Table 2- 2).
U2000 Series Operating and Service Guide
1).
UPPER range
–
10 dBm 10 dBm to +20 dBm
0 dBm to +30 dBm
+20 dBm to +44 dBm