11
Version 3.4
Summator-combiner of NMEA signal (sentences)
NC-217
Figure 9 describes a purpose of potentiometers:
Р1 (+5 Set) – a service trimmer potentiometer to adjust in-circuit power supply;
it is prohibited to change its position;
Р2 (Contrast) – a trimmer potentiometer to adjust contrast ratio of LCD.
Figure 9 describes light-emitting diodes:
Each output “OUT1” to “OUT12” and input port “DATA_IN1” to “DATA_IN4”
is outfitted with an individual LED of channel activity (D3, D5, D6, D7, D11, D12, D13,
D16, D17, D20, D21, D24, D25, D26, D30, D34,) that lights up with green if data are avail-
able on the port;
Each “DATA_I/O1” and “DATA_I/O2” port is outfitted with LEDs D27, D33
and D44, D47, two LEDs per port to indicate input and output data on each port, respec-
tively;
LED D41 (MAIN) – lights up if the Product operates from “DATA_I/O1” port;
LED D40 (RESERVED) – lights up if the Product operates from “DATA_I/O2”
port;
LED D38 (TEST OK) – not used;
LED D42 (Power) – lights up if power supply is available;
LED D39 (Alarm) – lights up in case of emergencies.
