Specifications: The report mainly provides the test status of various electrical performance parameters of DY4C PTZ upgraded three-in-one antenna. (as follows
As shown in Figure 1)
2.1 Specifications
DY4C PTZ upgraded 3-in-1 antenna working in 824-960, 1710-2690mhz &2400-2500MHz.
2.2 Antenna matching circuit
DY4C PTZ upgraded version 3-in-1 antenna matching for the motherboard.
2.3 VSWR (Standing wave Ratio) test
A. Test Settings
The VSWR test device is connected successively: 8714ET network analyzer →50 ohm coaxial Cable→120mm long copper tube →
Test fixture.
Handling of test fixtures: From the antenna 50 ohm test point on the PCB of DY4C machine, use a cable to lead out the SMA connector and sleeve
The copper pipe with the choke is connected, and then the other devices are connected in turn
