Interface USB/RS232/RS485 eng (24.11.2014)
- 6 -
Kompetent für Elektroniksysteme
Interface USB/RS232/RS485 eng (24.11.2014)
- 7 -
Kompetent für Elektroniksysteme
The service interface is used to program the EEPROM registers and to adjust the potentiometer.
To use the RS232 interface for service purposes, it has to be activated at power-on of the device.
Activation is no longer possible after the interface is connected to the Major or to the radio.
When the terminal program is connected to the interface, the telegram "gk00" can be seen, which
is sent every second. Now, one hast to blindly type the activation sequence to activate the service
interface:
1.) press together button "Ctrl" + button "B"
2.) text input: "monitor" (caps lock must be deactivated - only small letters allowed)
3.) press together button "Ctrl" + button "C"
If the activation was successful, the start text of the monitor is displayed. Sending of the "gk00"
telegrams is suspended for 10 seconds after the last character that the interface receives from the
terminal program. After this, the telegram reappears, but can be simply ignored and has no influence
on the input from the terminal.
Monitor Instructions
In order to excercise a monitor instruction, type the respective characters, confirmed with Enter/
Return.
Rxxx.......................... read register xxx
Pxxx yyyyyyyy........... program register xxx with yyyyyyyy
A............................... adjust potentiometer
Q............................... software reset
X............................... quit monitor
Before connecting the interface to a Major or a radio again (e.g. to check adjusted potentiometer
values), you need to quit the service monitor using the "X" instruction. This way, the monitor can
be reactivated simply by pressing Enter/Return again. If the monitor is no longer needed and the
interface is intended for normal operation, the monitor must be left using the software reset "Q".
Alternatively the interface can be switched off and on again.
!!!
The radio should not be operating while the service monitor is not completely deactivated. This
may result in malfunctions that can only be fixed by restarting the whole radio system
!!!
EEPROM Registers
Register 000 Digit 1: Baud rate of the RS485 interface, set ex factory to: E (230400)
Wert
0
1
2
3
4
5
6
7
Baud
4800
9600
14400
19200
28800
38400
57600
76800
Wert
8
9
A
B
C
D
E
F
Baud
96000
115200
128000
134400
161280
201600
230400
249600
Higher bau rates result in reduced reaction times, lower baud rates allow for transmissions over
longer distances. The baud rate has to be programmed equally for all interfaces that are connected
to the RS485 bus.
Service Interface
