  We present the results of a beam test conducted on a telescope using the
JadePix-3 pixel sensor, developed with TowerJazz 180 nm CMOS imaging
technology. The telescope is composed of five planes, each equipped with a
JadePix-3 sensor with pitches of 26 um x 16 um and 23.11 um x 16 um. In
addition, it features an FPGA-based synchronous readout system. The telescope
underwent testing using an electron beam with energy ranging from 4 to 6 GeV.
At an electron energy of 5.4 GeV, the telescope demonstrated superior spatial
resolutions of 2.6 and 2.3 um in two dimensions. By designating the central
plane as the device under test, we evaluated the JadePix-3 sensor's spatial
resolutions as 5.2 and 4.6 um in two dimensions, achieving a detection
efficiency of over 99%.
