QUESTION

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asked by
Updating PCB from M10478 to M20048

To update our existing PCB to the M20048 here is what I believe needs to be done. It interfaces to a micro running at 3V3

  1. Run supply directly off the micro rail (which is coming off a switcher supply). Could there be issues with noise?
  2. Tuning pins 1 and 28 must be disconnected from 0V and connected to 0V via suitable resistor, cap etc
  3. VBCK needs to be connected to 1.8V
  4. ANT_OUT needs to be connected to ANT_IN via a capacitor.
Is there anything else I may have missed?
kind regards
Liam

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2 Answers

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answered by
Hello Hazeman,

The M20048 is not the direct replacement for the M10478. The M20050 is the direct replacement. Our product website has detailed instructions on upgrading to the new Radionova module.

Best regards,

Geoff S.
commented ago by
Hi,

 Because I never saw this until today we ended up fitting the M20048 in place. Performance was poor - slow TTFF, no satelite above 30dB.

 If we switch to the M20050 will we see an improvement (with default matching components)? I've order one to try this.

Could you tell me where the instructions are exactly please?

kind regards

Liam
commented ago by

Hi Liam,

From a chipset standpoint, yes, the M20050 is a better GNSS engine. It states in the datasheet that: "The module can run three GNSS systems simultaneously to enhance location and TTFF considerably."

You can download the datasheet on our website here:

GPS/GNSS Receiver Module - Antenova

Best regards,

Geoff S.

0 votes
answered ago by
Hi Liam,

Let me briefly answer your questions:

1. Yes, there can be issues with noise. Our datasheet comes with schematics to help you implement our GPS Module.

2.The tuning pins go straight to ground so yes, 0V is necessary.

3. The VBCK should be between 2.0 and 4.2VDC. Typical is 3.3VDC.

4. Yes, that is correct. There should be a capacitor between the ANT_OUT and ANT_IN.

You will be able to verify the schematic once you have it downloaded. There is some filtering on the TX and RX signal lines that is necessary.

Best regards,

Geoff S.

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