Tel: 886.909 602 109 Email: [email protected]
167
NOTE:
If the measured power is greater than +20dBm, an attenuator should
be added between the USB power sensor and the device to be tested.
The offset value can be set by the offset function introduced later to
offset the attenuation value of the attenuator!
1
Select modeSelect mode
a)
After powering on, press
【
Mode
】
.
b)
Select “
USB Power Meter
” mode.
c)
Press [OK] to finish.
2
Connect power sensor
a)
Connect the small port of the USB cable to the S8723X series USB power sensor.
b)
Connect the large port of the USB cable to the USB port of the microwave analyzer, and the
green indicator of power sensor will light up later.
c)
If user wants to power off, please unplug the USB cable to turn off the USB power sensor, and then
the green LED will go out.
NOTE:
The S 8723X Series USB Power Sensor comes with a USB cable for
users.
They can use your own USB cable, but make sure the cable meets
international safety standards.
3
Connect to the signal to be tested
a)
Connect the power sensor to the signal under test, and connect the attenuator or gain between the
signal under test and the power sensor as needed to ensure that the signal power of the input
sensor is within the power range identified by the sensor.
b)
If an attenuator or gain is connected, the offset function can be set to offset the attenuation or gain
value, thus reading the actual power value.
A typical test connection is shown in Figure 9-1 (attenuator or gain is added as needed)
NOTE:
Ensure that the input signal power is within the input power range
identified by the sensor to avoid damage to the sensor caused by
excessive power!
4
Zero
In order to improve the measurement accuracy of the instrument, it is necessary to zero the instrument
before using the S8723X series USB power sensor for small signal power measurement. Zero refers
to measuring and saving the noise of the entire measurement channel. During the measurement
process, the zero value needs to be deducted from the actual measured value, that is, when the
noise of the channel is subtracted, the reading at this time is the true channel input signal level. The
zero of the USB power sensor is consistent with the zero of the general power sensor. The zero refers to
the internal zero of the USB power sensor, and the internal zero adds a switch at the front end of
the measurement channel, and user does not need to disconnect the sensor from the device under
test, and test and measure and save the noise of the channel. During the internal zero process, the RF
signal is constantly applied to the power sensor, which reduces the wear on the sensor connector and
shortens the test time as follows:
a)
Press
【
Calibrate
】
→ [Zero] , then the microwave analyzer sends a zero calibration command to
the USB power sensor and perform internal zero calibration.
5
Set Frequency
Before performing the USB Power Meter, the frequency value of the signal to be measured should be set,
and the sensor will automatically correct the measurement result according to the corresponding
correction factor stored internally, thus improving the measurement accuracy. The corresponding
！
！
！
