Videotec DTRX3 - Manual (Page 45)

Page 15 MNVCDTRX301_0850
6.12 Adjusting the voltage of the optics controls
• connect the power supply cable and power the DTRX3 unit (LD1 lit up)
• insert a load between terminals FOCUS NEAR and FOCUS FAR to absorb at least 10 mA (use a resistor
from 100 to 1000 ohm).
• position the tester prods on terminals FOCUS NEAR and FOCUS FAR
• keep one of the two FOCUS keys on the control unit pressed down
• adjust the control voltage of the optics by adjusting trimmer TR1 (default 12V
= )
NB: don’t make unloaded voltage regulation (without inserting the load) otherwise the adjustment will be
incorrect.
6.13 Connecting the pan&tilt and optics cables
WARNING!: Before carrying out the following operations make sure that the pan&tilt control voltage and
the setting for optics type are correct.
• disconnect the power supply to the unit
• make the connections with the optics and pan&tilt
• reconnect the power supply to the unit
For optics and pan&tilt with PRESET functions (PAN,TILT, ZOOM, FOCUS and IRIS, VCC and GND),
the maximum length of the preset cables should not exceed 5 metres, otherwise positioning on the stored
positions will be incorrect.
7 Setting the receiver for PRESET functions
The DTRX3 receiver has integrated preset functions (for pan&tilt and the optics). It is possible to store up to a
maximum of 14 positions using the standard Videotec protocol or up to a maximum of 40 positions using the
MACRO and Pelco D protocols. All positions can be recalled using the keyboard with the Scan and Patrol
functions. The receiver is able to make a test to automatically detect which preset functions are present and
configuring the device is therefore a simple operation. However, it is necessary to take certain precautions:
• Before making the receiver test (to determine which preset functions are active), make sure the cables for
pan&tilt and the optics have been connected correctly
• For the preset cables (PAN, TILT, ZOOM, FOCUS, IRIS, VCC and GND) use cables with a maximum length
of 5 metres