The preferred method for resolving serial port compatibility issues is to download software updates for your product from www.anritsu.com.
Method 2–Trying a Different USB Port
1. Disconnect the USB end of your power sensor from your computer (or USB hub).
2. Connect the USB power sensor to a different USB port on your computer. Connecting to a USB hub tends to increase the port numbers, so connecting directly to the computer’s USB port usually provides the best result.
3. Open the Device manager to see if the new port assignment is between COM2 and COM49. If it is NOT, return to step 1 and connect to a different USB port. If the port assignment is between COM2 and COM49, the problem has been resolved and no further action is required.
Method 3–Remapping a Serial Port
A serial port may be remapped to a different number, such as changing a serial port from COM19 to COM5. This may be needed if the methods above do not result in a serial port assignment between COM2 and COM49 or if you prefer to use a USB hub or a specific USB port on your computer.
1. Open the System Properties by going to Start | Settings | Control Panel | System, or simultaneously pressing the Windows and Pause keys.
2. Select the Hardware tab and click the Device Manager button to open the Device Manager.
System Properties
3. Click the + box next to Ports (COM & LPT) to expand the installed ports list.
Device Manager
4. Select the port that is assigned to the power sensor. Disconnect and reconnect the sensor and notice the new COM port number that appears. The new port is the current port assignment for the power sensor.
5. Right-click on the new port assigned in step 4 above and select Properties from the pop-up menu to display the properties for that port.
6. Click the Port Settings tab of the properties window.
7. Click the Advanced button to show the advanced property settings for the port.
Advanced Settings for COM Port
8. Select a COM Port Number in the range of 1 through 16. If possible, select a port which is NOT marked as “in use” in the COM Port Number list. If all of the ports are marked as being in use, select port number 16 unless you know for sure that something is actually using COM16.
9. You will get an alert when you close the window telling you that the COM port number may be in use by another device and asking if you want to continue. Click Yes to continue.
