87
4.2.7 IR source voltage setting
Fig. 31: IR source voltage setting
The jumper JP2 is for setting voltages of the IR sources. All available sources in an
IR cell are connected in series. Normally the voltage of each source is 1.75 VDC.
The total voltage of all available cells can be measured on test point TP7 against
TP1=GND.
Caution: In case of adjusting resp. changing the IR source voltage, the base lines
take a few minutes to stabilize at a new level.
In case of problems with adjusting the base line see chapters “Infrared cell
adjustments” and “Infrared power supply”.