How to change the CH0-CH7 upstream frequency?

[zhaozhenhong5]

I am using CN470 gateway-conf. I want to change the frequency of each upstream channel. See the config file below: For example,I changed "487.1 MHz" to "472.1 MHz" directly,but it can't work.
Do someone know how to change?
##########
"chan_multiSF_0": {
"desc": "Lora MAC, 125kHz, all SF, 487.1 MHz",
"enable": true,
"radio": 1,
"if": -300000
},
"chan_multiSF_1": {
"desc": "Lora MAC, 125kHz, all SF, 487.3 MHz",
"enable": true,
"radio": 1,
"if": -100000
},
"chan_multiSF_2": {
"desc": "Lora MAC, 125kHz, all SF, 487.5 MHz",
"enable": true,
"radio": 1,
"if": 100000
},
"chan_multiSF_3": {
"desc": "Lora MAC, 125kHz, all SF, 487.7 MHz",
"enable": true,
"radio": 1,
"if": 300000
},
"chan_multiSF_4": {
"desc": "Lora MAC, 125kHz, all SF, 486.3 MHz",
"enable": true,
"radio": 0,
"if": -300000
},
"chan_multiSF_5": {
"desc": "Lora MAC, 125kHz, all SF, 486.5 MHz",
"enable": true,
"radio": 0,
"if": -100000
},
"chan_multiSF_6": {
"desc": "Lora MAC, 125kHz, all SF, 486.7 MHz",
"enable": true,
"radio": 0,
"if": 100000
},
"chan_multiSF_7": {
"desc": "Lora MAC, 125kHz, all SF, 486.9 MHz",
"enable": true,
"radio": 0,
"if": 300000
},

[johanstokking]

Adjust the if considering the frequency of the concerning radio.

[zhaozhenhong5]

Thank you. And do you know how to adjust?

[cstratton]

You have to work out the offset (within the allowed range) of each IF from the corresponding radio's center frequency - is the "if" field that really matters, the description is just a description.

Someone has certainly already figured this out for your bandplan

[rbaldwin13]

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