I've been having some issues with the stability of the BER of my MMDVM_HS Hat hotspot when using DMR recently, and can't get it down to a low enough level. Can't say for sure what the root cause is, but it has happened since the latest firmware updates to 1.3.6/7 (also since the upgrades to 3.4.14/15). (Not having this issue with my ZUMspot hotpsot with same updates/upgrades, and using the same radio.) It has been recommended to me that I enable AFC in ADF7021.h. Can anyone provide some fairly easy-to-follow instructions for how I might edit this firmware file (for someone who has never before edited a firmware file)? I use both a Mac and Windows machine, as well as my RPi running Pi-Star, and I have another RPi running Raspbian, so I could use any of those environments, I guess. Thanks.
EDIT: My issue turned out to be a bad board.
Suggestion for how to enable AFC in ADF7021.h
Suggestion for how to enable AFC in ADF7021.h
Last edited by KE0FHS on Sun Dec 30, 2018 5:53 pm, edited 1 time in total.
73, Toshen, KE0FHS
Playing with Pi-Star (unofficial notes about setting up and using Pi-Star):
https://amateurradionotes.com/pi-star.htm
Playing with Pi-Star (unofficial notes about setting up and using Pi-Star):
https://amateurradionotes.com/pi-star.htm
Re: Suggestion for how to enable AFC in ADF7021.h
Hi,
I've to add a request following this one.
In my opinion, would be very useful to have in Pistar platform, settings for RX also; i.e. in ADF7021 (drag and drop from datasheet): " LNA has two basic operating modes: high gain/low noise mode and low gain/low power mode. To switch between these two modes, use the LNA_MODE bit (R9_DB25). The mixer is also configurable between a low current and an enhanced linearity mode using the MIXER_LINEARITY bit (R9_DB28)." and: "The gain of the LNA is configured by the LNA_GAIN bits (R9_DB[20:21]) and can be set by either the user or the automatic gain control (AGC) logic."
It is possible to upgrade Pistar & firmware, as to give us the possibility to set these parameters ( and AFC also of course
) in order to obtain the most useful RX performance to each one of us?
Thank You in advance!!!
Stefano IZ4FXT
PS: I need to know how the "RFlevel" parameter works to the power output: is this number in % of the maximum power of 20mW of the hat?
I've to add a request following this one.
In my opinion, would be very useful to have in Pistar platform, settings for RX also; i.e. in ADF7021 (drag and drop from datasheet): " LNA has two basic operating modes: high gain/low noise mode and low gain/low power mode. To switch between these two modes, use the LNA_MODE bit (R9_DB25). The mixer is also configurable between a low current and an enhanced linearity mode using the MIXER_LINEARITY bit (R9_DB28)." and: "The gain of the LNA is configured by the LNA_GAIN bits (R9_DB[20:21]) and can be set by either the user or the automatic gain control (AGC) logic."
It is possible to upgrade Pistar & firmware, as to give us the possibility to set these parameters ( and AFC also of course
) in order to obtain the most useful RX performance to each one of us?Thank You in advance!!!
Stefano IZ4FXT
PS: I need to know how the "RFlevel" parameter works to the power output: is this number in % of the maximum power of 20mW of the hat?