Basic Functional Check

To assure that the FCM is functional, use a simple *IDN? query (see SCPI Queries and Commands above). This will cause the FCM status LED’s to blink rapidly (red/blue) for approximately 4 seconds and will return Manufacturer, Device Type, Serial Number, and Firmware Revision.

Example: *IDN? Response: ATE Systems,FCM,FCM9999,1.0.0

Advanced Performance Check

To perform an advanced performance check:

  1. From the front panel of the PNA, connect test cable (semi-rigid or other RF cable) sufficient to reach from PNA Port 2 to FCM Port 2.
  2. Perform a 2-port mechanical SOLT calibration at PNA Port 1 and at the end of the test cable from PNA Port 2.
  3. Connect FCM Port 1 directly to PNA Port 1. Connect FCM Port 2 to the end of the test cable from PNA Port 2.
  4. Via the InCal system software or SCPI command (see SCPI Queries and Commands above), set the FCM to impedance state R1. Measure S11.
  5. Compare the measured result to the characterization data provided with the FCM. From the PNA:
    1. Go to File > Recall.
    2. Navigate to the specific FCM characterization directory identified by serial number. An example is shown in Figure 3.
    3. Recall the required file and compare to the current measurement.
  6. Repeat steps 3 and 4 for each of the remaining impedance states (R2-R6).
  7. Set the FCM impedance state to THRU. Measure S11, S21, S12, and S22.
  8. Compare the measured result to the characterization data provided with the FCM. From the PNA:
    1. Go to File > Recall.
    2. Navigate to the specific FCM characterization directory identified by serial number. An example is shown in Figure 3.
    3. Recall the required file and compare to the current measurement.


Figure 3 Example FCM Characterization Directory Structure