Linux/WL1835MODCOM8B: BER test for WL1835 + BLE

Your Query is assigned to a Hardware expert. He will get back soon..

Thanks

Hi,

Please see links below for suggestions.
e2e.ti.com/.../272567
processors.wiki.ti.com/.../PTM

Regard,
Charles O

Hi Charles,

Is it possible to test BER test without transmitter like continuous RX test for BLE ?
We tried to execute the commands mentioned in below link in section "RX BER meter test" using "hcitool" but getting 0x01 first byte in response which indicate that command execution failed.

Link : processors.wiki.ti.com/.../WL18xx_Bluetopia_PM_Bluetooth_RF_Testing

We studied above link and implemented test for continuous TX/RX for BLE for FCC certification but not getting proper steps (how to execute) to find BER and PER for BLE.

Please provide guideline and required steps to find BER and PER of BLE using "hcitool". We are using WL1835 module.

Thanks,
Ankit

Hi Charles,

On execution of the command "Send_HCI_VS_DRP_Read_BER_Meter_Result" using hcitool, we are getting result "0" at receiving side.

Below is the description that we are doing to measure BER of BLE.

1) Setup one device (custom board)with WL1835 module as transmitter.
2) Setup second device (custom board)with WL1835 module as receiver.

On Tx side, we are executing below mentioned commands with output using hcitool.
1)hcitool cmd 0x3f 0x006 0x34 0x12 0x78 0x56 0x34
output :
< HCI Command: ogf 0x3f, ocf 0x0006, plen 6
34 12 78 56 34 12
> HCI Event: 0x0e plen 4
01 06 FC 00
2)hcitool cmd 0x3f 0x1CC 0x01 0x03 0x62 0x09 0xff 0xff 0x05 0x00 0x1b 0x00 0x07 0x01 0xff 0x01
output:
< HCI Command: ogf 0x3f, ocf 0x01cc, plen 14
01 03 62 09 FF FF 05 00 1B 00 07 01 FF 01
> HCI Event: 0x0e plen 4
01 CC FD 00

On Rx side, we are executing below mentioned commands with output using hcitool.
1) hcitool cmd 0x3f 0x18B 0x00 0x00 0x12 0x34 0x56 0x78 0x12 0x34 0x01 0x01 0x1b 0x00 0xe8 0x03 0xff 0x01 0x01
output :
< HCI Command: ogf 0x3f, ocf 0x018b, plen 17
00 00 12 34 56 78 12 34 01 01 1B 00 E8 03 FF 01 01
> HCI Event: 0x0e plen 4
01 8B FD 00

2) sleep 10
3) hcitool cmd 0x3f 0x113
output:
< HCI Command: ogf 0x3f, ocf 0x0113, plen 0
> HCI Event: 0x0e plen 15
01 13 FD 00 00 00 00 00 00 00 00 00 00 00 00

In response of 3rd command in Rx side , we are getting sequence of "00" that shown in HCI Event tag which indicates that
Finished at least 1 test : 0x00
Number of packet received in current measurement : 0x00000000
Total bits counted : 0x00000000
Number of bits error found : 0x00000000

Please give us your valuable response to get proper BER data for above setup.

Your quick response will be appreciated.

Thanks,
Ankit Bhalani

Hi,

We are waiting for your valuable response.

Thanks,
Ankit Bhalani

Hi Ankit,

Sorry for the delayed response. The expert on this is on business travel. I will ping him again.

Thanks for the patience .

Regards,

Charles O

Hi Ankit,

I looked into this some more.

Why do you need to run a specific BER test for BLE? The BER test is done for modulation types, not for BT or BLE standards. 

Regards,

Charles O

hello Charles

we wants to test BER for FCC certification purpose, As We are only using BLE mode not Bluetooth, so we have to test BER in the BLE mode. So kindly provide Proper way to find BER in BLE mode.

Regards,
Ankit Bhalani

Hi Ankit,

For the new requirement, the PER/BER test should be done in frequency hopping mode. Our approach to do this is to use HCITester in conjunction with a CBT tester. What you need to do is:
1) Connect to the CBT tester
2) Change to receiver quality tests -BER
3) Press the slave sig 1 button
4) Change the hopping scheme (single Tx/Rx, USA/Europe Reduced).

Thanks,
Riz

Hi Riz,

Can you please give the brief about connection setup of CBT tester with WL1835 and how to get BER using CBT tester ?
Can you please provide any link or document for executing above setup to get BER for BLE?

Thanks,
Ankit

Hi Riz,

Is the CBT tesing is same as DTM testing or there is some difference between them?
Can you please provide the way of DTM testing/CBT and what is the role of HCITester in the test?

Thanks,
Ankit