Hi blacktubi,

Thanks for a great Qualcomm chip modem 'SuperCharge' procedure ... I'm from Australia.

Whilst I understand the first step:

1. The first tweak boosts the Tx power by 3dBm (+23 to +26dBm)

Go to this value, change it to 26
NV_WCDMA_MAX_TX_POWER_1

Now +23dBm is 0.2 watts and +26dbm is 0.4 watts (3db is double the power).

So this is very significant and might just be something to help those on weaker or even congested links gain a reliable connection?

I think for most modems, the default value will be '23 or 24'?

3G output power is defined by the device power class. I think this document shows the relative UMTS power class levels: http://www.wayland.ma.us/Pages/WaylandMA_B.../powerlevel.pdf

Class 1 +21dbm

Class 2 +24dbm

Class 3 +27dBm

Class 4 +33dBm

Has anyone tried values >+26dBm?

The down side is that the modem will likely run a little hotter!

2. The second tweak is doing something to the Rx antenna which I don't profess to understand:

Go to this value, change it to -444 from (-100?)
Depends on modem, the value are different, test which one that works the best for you
“NV_WCDMA_VGA_GAIN_OFFSET_1”

What does the second step actually do to the modem internal antenna(s) and what to the values mean?

PS I presume the usb modem drivers must be installed for QPST to function?

Cheers

Hi blacktubi, thanks for the reply.

Wow +33dBm. That 2 watts!

Class 1 +21dbm, 125mW

Class 2 +24dbm, 250mW

Class 3 +27dBm, 500mW

Class 4 +33dBm, 2W

In Australia, we have a broad mix of Huawei, ZTE and Sierra 3g and 4G modems.

Modems with external antenna ports are almost universal.

Our current 4G modems are the Sierra 320U, ZTE MF821 (both Telstra) and Huawei E3276 (Optus).

A reliable 3G modem used by many is the ZTE MF668.

I'll take it all away and have a play and see what i can find out about these devices.

Best Regards

John k

Yes, we've seen that.