The UDR has a SAW Filter in both the transmit and receive
paths. We are currently using a 440MHz filter with a 19MHz
BW, meaning we are 3db down at 430.5MHz and 449.5MHz.
I have been searching for 20MHz filters and have found no
reasonable cost solutions. I will be traveling to China
later this year to look into the cost (MOQ really) of having
SAW filters made to our specification.
Looking at the ARRL BandPlan for 70cm, ATV is up to 432
and the top of the band is for Voice repeaters. Many
countries only go up to 440.
The question for the group is, how does this affect your
planned deployment? Is it a real issue for production.
Thanks,
Bryan K7UDR