Hi all,
More JumboSpot issues. I checked the RF output power on my JumboSpot (2018 batch) from the SMA connector. It was well down on spec at -30dBm. I checked the RF output from the ADF7021 (pin 4) and it was +13dBm. It looks like they've fitted the wrong value parts in the low pass filter as there ...
Search found 2 matches
- Sat Aug 04, 2018 8:56 am
- Forum: MMDVM_HS Hat(s)
- Topic: jumbospot issues
- Replies: 7
- Views: 9813
- Sat Aug 04, 2018 7:15 am
- Forum: MMDVM_HS Hat(s)
- Topic: jumbospot issues
- Replies: 7
- Views: 9813
Re: jumbospot issues
Hi,
I had the same problem - no TX or RX from the Jumbo Spot board. I checked the output from the 14.7456MHz TCXO which is the reference oscillator for the ADF7021 TX/RX IC and it was dead - no RF output. Rather than return it to China I replaced the TCXO with a FOX924B-14.7456 MHz TCXO. Cost me GBP ...
I had the same problem - no TX or RX from the Jumbo Spot board. I checked the output from the 14.7456MHz TCXO which is the reference oscillator for the ADF7021 TX/RX IC and it was dead - no RF output. Rather than return it to China I replaced the TCXO with a FOX924B-14.7456 MHz TCXO. Cost me GBP ...