Vertex Standard VX-520U, Service Manual, Page: 33 / 52

33
Main Unit
–115.0 dbm –121.0 dbm
RX: 0.8 V
–111.0 dbm –114.0 dbm
–113.0 dbm
RX: 0.4 V
4.7 V
–116.0 dbm
RX: 0.7 V
–100.0 dbm
RX: 3.6 V
RX: 4.6 V
W: 5.0 V
N: 0 V
TX L: 1.4 V
TX H: 2.8 V TX L: 1.4 V
TX H: 2.7 V
TX L: 2.2 V
TX H: 2.7 V
TX L: 0.3 V
TX H: 1.9 V TX L: 1.9 V
TX H: 2.5 V
TX: 4.3 V
TX: 0.5 V
TX: 0.7 V
TX: 2.9 V
RX: 1.1 V
TX: 1.3 V
2.9 V
4.9 V
RX: 0.7 V
TX: 0.6 V
RX: 1.8 ~ 4.0 V
TX: 1.6 ~ 4.0 V
0.8 V
TX: 1.5 V TX: 1.8 V
TX: 4.7 V
TX: 1.7 V
TX L: 2.0 V
TX H: 0 V
RX: 6.8 V
TX: 0 V
0.9 V
RX: 6.8 V
TX L: 6.4 V
TX H: 6.1 V
TX L: 0 V
TX H: 2.7 V
W: 2.1 V
N: 5.0 V
7.2 V
5.0 V
RX: 0 V
TX: 0.8 V
SQL Close: 0 V
SQL Open: 4.4 V
RX: 0 V
TX: 0.8 V
1.3 V
TX L: 5.0 V
TX H: 0 V
0 V
0 V
0 V
0 V
TX L: 0.1 V
TX H: 0.2 V
0.6 Vpp
0 V
–114 dbm
SQL Close: 0 V
SQL Open: 3.2 V
Circuit Diagram