"Unable to Adjust RF Threshold (Error 614)"

Updated Dec 11, 2020

Reported In


  • Micropross Accessories


- MP500 TCL3 signal generator with card emulation feature
- MP500 PT1NFC signal generator with card emulation feature

MPManager user interface and its script editor
Any test solutions for testing reader device

Issue Details

I’m running test on NFC reader with MPManager and a card emulation script or when using a test solution with MP500 device, and I keep getting “ERR: Unable to adjust RF field threshold (error 614)”.

Why am I seeing these errors?


When card emulation channel is opening, the MP500 device is trying to adjust the level of the RF modulated signal picked up in order to obtain a constant signal at the receiver input. 
If the system fails to adjust the level, the error “ERR: Unable to adjust RF field threshold (error 614)”.
is returned. 

Make sure that the reader under test is polling with a decent field strength level.
Remark: you can measure the reader’s field strength in the Test -> RF MEASUREMENT section of MPManager. 

Ensure that the simulation antenna used is correctly connected with the MP500 and positionned on top of the reader.
Remark: we recomend to connect the simulation antenna with the MP500 device before power it on.  

If you have to start the card emulation script before to make the reader start polling, check the timeout setting to open the card emulation channel and allow enough time for the polling sequence to start.
You can adjust the timeout in the “common properties” window on the right side.
We recommend a command timeout of 10,000 ms for opening the card emulation channel.

It is also possible to adjust the global script timeout to 20,000 ms. You can do this by clicking on Settings > Script/Log and setting the Script Commands Timeout to 20,000 ms. Be sure to click “OK” to confirm the change.

NOTE: The global script timeout must be greater than any of the individual step timeouts.

Finally, make sure that the reader under test is polling with at least 5 ms between each reader command.
MP500 device may have difficulty to synchronize with the reader under test if the reader modulating the field and send command with a time period between each polling sequence less than 5 ms.

Additional Information

If the issue remains, please try to use another kind of simulation antenna with smaller form factor.