Using U2000 Series USB Power Sensors
7
N1913A/1914A EPM Series Power Meters User’s Guide User’s Guide
175
Measurement Accuracy and Speed
The power meter has no internal ranges. The only ranges you can set are
those of the U2000 Series USB power sensors. With an U2000 Series
power sensor the range can be set either automatically or manually. Use
autoranging when you are unsure of the power level you are about to
measure.
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.
The default is
AUTO
. In
AUTO
the range crossover value depends on the
sensor model being used.
C A U T I O N
To prevent damage to your sensor do not exceed the power levels specified in the sensor
user’s guide. The U2004A sensor is DC coupled. DC voltages in excess of the maximum
value (5 VDC) can damage the sensing diode.
Sensor
LOWER range
UPPER range
U2000A, U2001A, U2002A, U2004A
–
60 dBm to
–
10 dBm
–
10 dBm to +20 dBm
U2000H, U2001H, U2002H
–50 dBm to 0 dBm
0 dBm to +30 dBm
U2000B, U2001B
–30 dBm to +20 dBm
+20 dBm to +44 dBm
Sensor
Range Crossover Values
U2000A, U2001A, U2002A, U2004A
–
10 dBm + 1 dB
U2000H, U2001H, U2002H
0 dBm + 1 dB
U2000B, U2001B
+20
dBm + 1 dB