THVD1500: Issue for the GPS tracker

Wesley Huang

Part Number: THVD1500

Hi team，

I use THVD1500 in the GPS tracker for communication with other device. But I met some problem, Could you please provide some solution for me?

When the THVD1500 is enable and trans the data, the location created by the GPS is not current. However, when the THVD1500 is disable and didn’t trans the data, the location created by the GPS is correct. Could you help me identify the reason?
Here is the circuit of the THVD1500, the R30 and R40 is not connected.

Best Regards

Wesley Huang

over 4 years ago

0 Hao L over 4 years ago

TI__Mastermind 25705 points

Wesley,

THVD1500 works with 5V voltage only. Can you check if the supply is correct? Can you also capture some waveforms of the transmitted data?

Regards,

Hao

0 Wesley Huang over 4 years ago in reply to Hao L

Expert 1030 points

1. The VDD is the 5V supply.

2. I will capture the waveform later. Could you please provide some advice or possible cause of this problem?

0 Hao L over 4 years ago in reply to Wesley Huang

TI__Mastermind 25705 points

It sounds like the device doesn't work in the receiver mode. If so, can you check the bus voltage (A, B and A-B) and receiver output? In many issues I have seen, the bus signal is not right due to noise or grounding issue.

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THVD1500: Issue for the GPS tracker