TX POWER For Ble Radio Test Example

RE: TX POWER For Ble Radio Test Example

Håkon Alseth — Tue, 21 May 2024 07:29:53 GMT

Hi,

I would recommend that you contact a test house to perform such oeprations.

I do not have any details about the specific test that you are running, or your setup in general.

Kind regards,

Håkon

RE: TX POWER For Ble Radio Test Example

ChiragBhavsar — Fri, 17 May 2024 14:14:22 GMT

Hi Hakon,

can you please give us suggestion what we can do next in this situation.

RE: TX POWER For Ble Radio Test Example

ChiragBhavsar — Thu, 16 May 2024 14:24:15 GMT

Hi,

We tested this on FCC Lab Chamber.

In our custom board we are used RAYTAC MDBT50Q-1MV2 Module & RAK3172 LoRaWan Module,

Both work in different frequency,

so We will conduct the Spurious Radiated Emissions test as per FCC 15.247 (d) / (15.209 & 15.205) to verify the inter modulation component when both modules transmit simultaneously,

so you have any idea for this Spurious Radiated Emissions test 25dbm signal loss is allow?

RE: TX POWER For Ble Radio Test Example

Håkon Alseth — Thu, 16 May 2024 14:09:47 GMT

If you are measuring radiated, and you do not seem to have a controlled environment. This means that the signal strength will vary based on orientation/distance and other factors.

[quote user="ChiragBhavsar"]allow in FCC Certificate?[/quote]

The module is pre-certified for FCC, as shown in the picture on the vendor's website: https://www.raytac.com/product/ins.php?index_id=24

Kind regards,

Håkon

RE: TX POWER For Ble Radio Test Example

ChiragBhavsar — Thu, 16 May 2024 13:58:22 GMT

Hi,

Yes we measuring radiated,

so this 25dbm signal loss is allow in FCC Certificate?

RE: TX POWER For Ble Radio Test Example

Håkon Alseth — Thu, 16 May 2024 12:51:57 GMT

[quote user="ChiragBhavsar"]RAYTAC MDBT50Q-1MV2 Module[/quote]

This module has a chip-antenna mounted.

Are you measuring radiated? If so, then you will see a loss in the signal strength.

If measuring conducted (ie. via a cable) - how is your setup?

Kind regards,

Håkon

RE: TX POWER For Ble Radio Test Example

ChiragBhavsar — Thu, 16 May 2024 12:34:30 GMT

Hi,

We are using RAYTAC MDBT50Q-1MV2 Module which is FCC Certified,

Currently we have tested with only one board,

we will try to send a picture of connected board.

As this Module is already FCC Certified what cloud be the reason of 25 dbm loss?

RE: TX POWER For Ble Radio Test Example

Håkon Alseth — Thu, 16 May 2024 11:57:50 GMT

25 dB loss is a lot, in terms of performance of your product (ie. range etc)

How many of your boards are showing this issue? Is it only one board, or many?

Can you share a picture of how you connected the board?

Kind regards,

Håkon

RE: TX POWER For Ble Radio Test Example

ChiragBhavsar — Thu, 16 May 2024 10:29:45 GMT

Hi,

Sure i will create private ticket for it but right now can you please tell me this power can effect on FCC Certificate?

RE: TX POWER For Ble Radio Test Example

Håkon Alseth — Thu, 16 May 2024 10:26:31 GMT

Hi,

You have a dampening of ~25 dB. Have you gotten your design reviewed by us? If not, could you please create a private ticket and ask for a review of your design?

Kind regards,

Håkon

RE: TX POWER For Ble Radio Test Example

ChiragBhavsar — Thu, 16 May 2024 07:04:59 GMT

Hi,

Now we changed the Radio Test Firmware and we make default power 8dbm,

in 8dbm we got -17.13dbm power so This is good for the FCC Certificate? If not good then how we can resolve this problem?

RE: TX POWER For Ble Radio Test Example

Håkon Alseth — Wed, 15 May 2024 09:13:51 GMT

Hi,

-32 dBm sounds way too low.

Q1: Can you share a picture of the spectrum in both working and non-working scenario?

Q2: Can you share the exact commands that you sent?

Kind regards,

Håkon