CC1310: communication to CC1101

Hello,

I try to send data from CC1310 868MHz based module to CC1101 868MHz module.

Receiver uses  SmartRF(2.9) typical setting:  Generic 868MHz -> Data rate: 10kBaud, Dev.: 19kHz, Mod.: GFSK, RX BW : 100kHz, Optimized for sensitivity

with SYNC1 C6  SYNC0 26

I guess corresponding setting for CC1310 is SmartRF(2.9): Legacy CC11xx settings for 779-930MHz band -> 10kbps, 2-GFSK, 19kHz deviation (CC1101 mode).

1. Is this right setting?

Generated smartrf_settings result in error 0x809 at set frequency 

problematic is pOverrides:

// override_synth_disable_bias_div5.xml
// Synth: Set divider bias to disabled
HW32_ARRAY_OVERRIDE(0x405C,1),

2. Is this particular override crucial or can be commented out?

Here on forum i found that Sync word is coded differently on CC1101 and CC1310

3. Should I somehow encode sync word for CC1310 or it is not necessary in legacy setting?

Thanks PeterK