How can i control a rssi of the BL600 series ?

Question

Hi, 
 I am developing ble apps with the BL600. 
I am coding a source file with the keil IDE. And this source is deployed to the nRF51 DK board through the nRFgo Studio. 
 Now, i am considering that i want to adjust the strength of rssi value. 
 First, i tried to use the 'sd_ble_gap_tx_power_set' method for it. 
An argument of this method was 4. 
And i built it and deployed it to the BL600. 
 But, a rssi did not become a stronger. 
A rssi had shown about -80 dBm. 
 Next, i deployed the same code to the nRF51 DK board directly. 
Then, i checked a rssi value, it had shown about -35 dBm. 
 My questions: 
 
 Can the 'sd_ble_gap_tx_power_set' method control a strenght of rssi on the BL600 ? 
 Is there other methods which be able to control it ? 
 
 I thank you for reading it through. 
 // yoshi

Ole Bauck · Accepted Answer

Hi Yoshi 
 In the Laird BL600 module you can control if the VDD_PA pin is connected to the antenna circuit, this is done with a transistor and controlled through pin P0.20. Configure P0.20 as an output and set it low to connect the VDD_PA pin. If the VDD_PA is not connected the output power will be dramatically reduced (approx. 40dbm).