# Autoranging problem for AX5043 transceiver (437.025MHz)

I am trying to configure AX5043 transceiver(ONSEMI) for PSK modulation and system parameters are as follows:

Modulation          :   BPSK
Carrier Frequency   :   437.025MHz

AX5043 chip is interfaced with PIC18F4550 micro controller using SPI.

AX5043 is connected to Crystal Oscillator of 32MHz.

Using internal VCO.


Now when I try to do auto ranging for the desired frequency, 437.025 MHz, which is configured in FREQA register(s), I am getting an auto-ranging error, i.e. RNGERR bit is going set after auto ranging is completed.

Can anyone help me with this?

Thank you.

• Welcome to ham.SE! We recommend all users take the tour to get the most from the site. – rclocher3 Dec 17 '16 at 20:08
• @user8883, I believe this question is better suited for electronics.stackexchange.com – Edwin van Mierlo Dec 22 '16 at 8:23
• Did you solve this problem? If yes, how? I am facing the same issue. Also, I would like to say I am studying this IC day and night. Maybe we can help each other. I have developed a full solution to configure and write to this IC in LabVIEW. – Filipe Taveiros Mar 3 '17 at 20:06