rfm69hcw frequency

[Qwe Qwe]

I can easily configure freq of module between 430 - 500 MHz.
Used and suggested registers values as above which is succesfully working:
0x07 => 0x6c //434MHz
0x08 => 0x80
0x09 => 0x00

But When I set the registers according to 915 MHz.Module Cant Trasmitting.I do not see anything in the frequency analyzer.
0x07 => 0xe4 //915MHz
0x08 => 0xc0
0x09 ?> 0x00

I do not change anything except the registers above when I change freq. from 430 Mhz to 915Mhz.
What is the reason for this?
Could it be related to the antenna?

[scalz]

Hello,
you need to match your antenna vs freq

[mfalkvidd]

A table with antenna lengths is available at https://www.mysensors.org/build/connect_radio

[kimot]

And are you using module dedicated for your frequency?
There are three frequency types of modules.
According your post, it seems, you tray all this with one module type.

[gohan]

Are you sure you can set 915 on a 433 module?

[mfalkvidd]

As already meintioned by @kimot and @gohan, the rfm69hcw comes in different versions. From the datasheet, there are four versions:

Each versions support a frequency range. This is also shown in the datasheet:

@Qwe-Qwe you need to buy a version that matches your frequency, and cut/buy an antenna that also matches the frequency.