ESB Telec and FCC Certification

[DX_HK]

I am developing a device that uses ESB.

Uses modules that are Telec and FCC certified with BLE profiles.
(module : MDBT50Q-512K)

I have a few questions.

Q1.
The TX power is configurable on the ESB, I don't know how that corresponds to the signal strength for certification.

How can I check the allowed TX power?

Q2.
Module certification:
FCC
15C 2402~2480MHz 0.0066W
Telec
FID 2402~2480MHz 5.9704mW/5.0816mW

Are these certification valid for ESB (2Mbps)?

[Elfving]

Hi,

Just to clarify:

How can I check the allowed TX power?

So you do know how to set it, but you wonder where you can check how high you can set it, for it to still follow the certification?

Regards,

Elfving

[DX_HK]

Yes, that's right.

I want to use the maximum TX power possible while still maintaining certification.

[Elfving]

Understood. My go-to ESB resource is unfortunately corrently sick. If it is okay with you, I'll get back to you on this once I can hear with him on this. If this case is more urgent however, let me know and I'll find this out some other way for you.

Regards,

Elfving

[DX_HK]

This question came up while I was preparing the FW for testing.
I hope to reach a conclusion by the end of this week.

So I'd like to check it as soon as possible.

[Elfving]

Hi again, and thank you for your patience on this,

Q1.
The TX power is configurable on the ESB, I don't know how that corresponds to the signal strength for certification.

How can I check the allowed TX power?

The requirements should be the same as for BLE:

FCC&US has a max of 20 dBm, Telec&Japan (along with the rest of the world) has 10dBm = 10 mW.

Are these certification valid for ESB (2Mbps)?

Could you expand a bit on this part? Where are you getting these?

Regards,

Elfving

[DX_HK]

Thank you for your reply.

In the module datasheet, the FCC and Telec certifications are listed as BLE and IEEE 802.15.4 certifications.

As I understand it, FCC and Telec are not protocol-level certifications,and the RF requirements for BLE and ESB are the same.
Therefore, not only BLE but also ESB is permitted.

[DX_HK]

Is there any problem with my understanding?

> The requirements should be the same as for BLE:
... So I don't think there's a problem, but I'd like to confirm just to be sure.

[DX_HK]

Sorry, I'm not an expert on wireless, so let me confirm a few things just to be sure.

The maximum output of the module is 8dbm.
It can be increased from the default 0dbm in ESB_DEFAULT_CONFIG.

Maximizing the transmit power will increase power consumption slightly.
On the VDDH line, increasing it from 0dbm to 8dbm showed an increase of 0.5mA, 2mW.
This appears to be due to radio power...right?

[Elfving]

DX_HK said:

Therefore, not only BLE but also ESB is permitted.

That is my understanding.

DX_HK said:

It can be increased from the default 0dbm in ESB_DEFAULT_CONFIG.

Yes.

DX_HK said:

Maximizing the transmit power will increase power consumption slightly.
On the VDDH line, increasing it from 0dbm to 8dbm showed an increase of 0.5mA, 2mW.

That makes sense. I believe how much it would increase would depend on the nRF though, I am not sure which one you are using.

Elfving said:

Are these certification valid for ESB (2Mbps)?

Could you expand a bit on this part? Where are you getting these?

Any update on this?

Regards,

Elfving