August 12-13, 2025
Off-road access point: Longitude: E121.472385
Latitude, N43.579511
Altitude: between 231.345 and 350 meters
V-band direct frequency, 14505000, Hytera PD880L, high power 5W transmit: Original antenna: Approximately 19.5km to 20km south, approximately 10.5km north; intermittent signal; the northern side has a lot of grid, which provides some shielding effect; as the saying goes, when you get to the end, it's all about luck. If you switch the direction from north to south, it won't work.
Control Room Antenna: Horizontal Height: None, using 30m feed line, 2.4m UV glass fiber antenna, and a lift pole with a height of approximately 6m. The steel cable inside the lift pole broke, and I am unable to repair it; it needs to be handed over to the manufacturer. Alternatively, it can be raised by 4M, and the lift pole is 10m long, resulting in good overall connectivity. U439750, Down Tilt: -5, Transmission Silence: 88.5.
Frequency: 438500, 438100, 438200
V: Direct frequency 14505000 / 14405000
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