User's Manual

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Proprietary Information,
Intelligent Automation Incorporated
6 Changing Carrier Frequency
The radio configuration is set in the following file /etc/sparrow_cfg.json
In order to change any configuration, we can edit this file and run re-initialize the radio.
Instead of re-initialization you may opt to reboot the radio too. After the boot up, the
changing configuration will take effect.
Here’s an example to modify the carrier frequency:
Open the configuration file with vi command. Scroll to “loFreqHz” : 2440000000
And modify the LO frequency in Hz. To edit, first hit ‘i’ and then edit with the new
frequency, and then hit ‘Esc’ and then ‘:wq” and then ‘Enter’.
Note:
 To comply with FCC allowed 2400 ISM band, the minimum and maximum
frequency we can set is the following: 2403,500,000 Hz & 2478,500,000 Hz
After the file edited you can verify it by:
To see if the new frequency is set correctly. Then you need to reboot the radio by this
command: