PowerXpert™ Help : Verifying MA24106A Performance : Frequency Response Test
 
Frequency Response Test
In this test, the frequency response of the sensor is tested at one low power level against a reference sensor of known measurement uncertainty. The reference sensor should be calibrated by a reputable standards laboratory using instruments with low published measurement uncertainty values. To perform the comparison, both sensors are used to measure the output power of a synthesizer with a high quality attenuator, such as the 41KC-6, on the output. The attenuator improves the source match of the synthesizer by lowering the mismatch ripples, thereby lowering the uncertainty in the comparison.
Test Procedure
1. Set up the equipment as follows (refer to Figure: Cal Factor Test Set Up for an illustration):
a. Connect the reference power sensor to the reference power meter using the appropriate cables.
b. Connect the MA24106A USB cable between the personal computer with the PowerXpert application installed and the MA24106A power sensor under test.
c. Launch the PowerXpert application.
d. Turn the power on to all of the instruments and allow them to warm up for the amount of time specified in their respective manuals.
e. Reset or Preset all of the instruments.
f. Configure the reference meter and sensor to measure a CW signal.
g. Perform a sensor Zero and a 1 mW reference calibration on the reference sensor and meter per the manufacturer’s instructions.
h. Perform a low-level Zero of the MA24106A by disconnecting the MA24106A from the synthesizer, clicking the Zero button on the PowerXpert GUI, and waiting for the Zeroing message to close.
i. Connect the attenuator to the output of the synthesizer, then connect the appropriate adapter to the output of the attenuator.
j. Set the synthesizer to +6 dBm and 50 MHz.
Cal Factor Test Set Up 
Index
Description
1
Reference Power Meter
2
Reference Power Sensor
3
PC with Anritsu PowerXpert Application
4
K to N Adapter
5
Attenuator
6
Synthesizer
2. Connect the reference sensor to the synthesizer with the appropriate adapter and attenuator in-line. See Figure: Cal Factor Test Set Up.
3. Apply the Cal factor to the reference sensor per the manufacturer’s instruction.
4. Record the power indicated by the reference meter in Table: Test Measurement Results.
5. Disconnect the reference sensor from the synthesizer output and connect the MA24106A power sensor with the appropriate adapter and attenuator in-line. See Figure: Cal Factor Test Set Up.
6. Apply the Cal factor to the MA24106A by entering the frequency (in GHz) in the PowerXpert application, and then click Apply above settings.
7. Record the power indicated by the MA24106A in Table: Test Measurement Results.
8. Set the synthesizer frequency to the next frequency in Table: Test Measurement Results.
9. Repeat Step 2 through Step 8 until all of the frequencies in Table: Test Measurement Results have been measured.
10. For each row in Table: Test Measurement Results, calculate the absolute value of the difference between the recorded Reference power measurement and the recorded MA24106A measurement, and record the result in Table: Test Measurement Results.
11. For each frequency, compare the power difference to the maximum allowed difference specified in Table: Test Measurement Results. If the difference is higher than the maximum allowed difference, contact Anritsu customer service.
Test Measurement Results



Frequency
(GHz)
A

Reference Power Measurement
(dBm)
B

MA24106A Measurement
(dBm)
|A-B|
Absolute Value of
Difference in Power
Measurements
(dB)


Maximum Allowed Difference
(dB)
0.05
 
 
 
0.26
0.1
 
 
 
0.26
0.3
 
 
 
0.26
0.5
 
 
 
0.26
1.0
 
 
 
0.26
2.0
 
 
 
0.31
3.0
 
 
 
0.31
4.0
 
 
 
0.31
5.0
 
 
 
0.33
6.0
 
 
 
0.33