Comdel CX600 Series, Руководство пользователя

Страница: 17 / 19

16
circuitry to limit forward power in cases of high PA current or high PA RF voltage. This protection
function is handled by U1.
2. CX MICROCONTROLLER PCB
This PCB (Figure FA0604RX), mounted under the CX INTERFACE PCB, contains a 16 bit
microprocessor, memory, digital I/O, and analog I/O to control and monitor all activities of the CX600.
If for any reason the program is terminated or gets lost, the watchdog timer U6 automatically restarts
the system. U6 also monitors VCC for low voltage conditions. If VCC drops below 4.5V, the system
is shut down via uP reset line, U1-71.
If the optional RS-232 serial port is utilized, U7 and associated components supplies the interface.
U14 provides the 5V or 10V reference for the A/D (U11) and D/A (U13) converters.
3. SOFTKEY INPUT INTERFACE PCB
This PCB (Figure FA0605RX) is mounted under the CX MICROCONTROLLER PCB and contains the
softkey sense pads and buffer circuitry to interface all front panel user interface to the CX
Microcontroller.
4. 20 x 2 CHARACTER ALPHA NUMERIC FLORESCENT DISPLAY PCB
This PCB, also mounted under the CX MICROCONTROLLER PCB, provides the display, high
voltage power supply, drive circuitry, and microprocessor to interface the 20 x 2 character display to
the CX Microcontroller data bus.
VIII. Certification
1. This unit carries the ETL safety compliance mark to UL standard UL-1012.
2.
This unit is SEMI F47 voltage sag immunity tested.
3.
This unit is designed and labeled in compliance with CE mark certification requirements. The manufacturer
will supply a Declaration of Conformity as required.