Canon MX920 Series Online Manual page 201

6. Check the status.
When the measurement is complete, the status is displayed.
When is displayed in Connection Performance between the Printer and the Access
Point:, the printer can communicate with the access point. Otherwise, refer to displayed
comments and the following to improve the status of communication link, and click
Remeasurement.
• Check that the printer and the access point are located within the wireless connectivity
range with no obstacles between them.
• Check if the distance between the printer and the access point is not too far.
If they are too far, move them closer together (within 164 ft./50 m).
• Check that there is no barrier or obstacle between the printer and the access point.
In general, connection performance decreases for communications through walls or
between different floors. Adjust the locations to avoid such situations.
• Check that there are no sources of radio interference near the printer and the access
point.
The wireless connection may use the same frequency band as microwave ovens and
other sources of radio interference. Try to keep the printer and the access point away from
such sources.
• Check if the radio channel of the access point is close to that of other access points
nearby.
If the radio channel of the access point is close to that of other access points nearby, the
connection performance may become unstable. Be sure to use a radio channel that does
not interfere with other access points.
• Check that the printer and the access point face each other.
Connection performance may depend on the orientations of the wireless devices. Replace
the access point and the printer in another direction to achieve the best performance.
• Check whether other computers are not accessing the printer.
If appears in the result of the measurement, check whether other computers are not
accessing the printer.
If still appears even if you have tried the above, finish the measurement, then restart the IJ
Network Tool to start over the measurement.
7. Click Finish.
Note
If any messages appear on Overall Network Performance:, move the machine and
access point as instructed to improve the performance.