gd77 autogenerates signal at 430.075 Mhz
Posted: Wed Jun 29, 2022 2:45 pm
hi all,
I state that this is not a firmware bug because the defect was also found with the original firmware.
It would appear to be something generated by Hardware.
On 4 gd77 tested I found that a signal is generated exactly at 430.075 Mhz.
In practice there is always a fixed carrier at 4-5 of rssi.
With the external antenna it decreases but does not cancel.
This can disturb the rx of any repeaters on that frequency.
I have tried with other radios like Anytone 878, TyT Md-380 in the same place as the gd77 and on this radio the signal do not exist.
approaching one of these radios to the gd77 the signal also appears on these devices.
Can you confirm that this also happens on your gd77?
Regards,
Fabio IU4LEG
I state that this is not a firmware bug because the defect was also found with the original firmware.
It would appear to be something generated by Hardware.
On 4 gd77 tested I found that a signal is generated exactly at 430.075 Mhz.
In practice there is always a fixed carrier at 4-5 of rssi.
With the external antenna it decreases but does not cancel.
This can disturb the rx of any repeaters on that frequency.
I have tried with other radios like Anytone 878, TyT Md-380 in the same place as the gd77 and on this radio the signal do not exist.
approaching one of these radios to the gd77 the signal also appears on these devices.
Can you confirm that this also happens on your gd77?
Regards,
Fabio IU4LEG