PRASTEL 2PH150A Manual Del Usuario página 10

2PH150A
Three pairs in a line
TX CH1
Two overlapping pairs
TX CH1
TX CH3
11.
OPTIC ALIGNMENT
1. Power the transmitter and the receiver
2. Look through the alignment finder on the receiver
and adjust the vertical and horizontal angle until the
transmitter is located in the centre of the finder.
3. Connect a voltmeter with 10VDC end of scale
to inputs Monitor (+) and Monitor (-) on the
receiver (see fig. 1).
4. Position the attenuation sheet provided on the
upper pair of lenses of the TX and of the RX.
5. Adjust the horizontal and vertical alignment
(in that order) both on the Transmitter and on the
Receiver, until the maximum value is obtained
on the voltmeter.
6. Repeat points 4 and 5 on the lower pair of
lenses.
7. Once the alignment has been checked, remove
the voltmeter and the attenuation sheets.
The table below gives the voltage values on the Monitor
terminals in the various alignment situations
(values with attenuation sheets)
Voltage on Monitor terminals
Between 600 mV and 900 mV
ENGLISH
RX CH1 RX CH1
RX CH1
RX CH3
Over 900 mV
Under 600 mV
TX CH1 TX CH3
Four overlapping pairs
TX CH1
TX CH3
RX CH2
RX CH4
Vertical adjustment
(rough)
Voltmeter (+)
(Receiver)
Alignment level
Excellent
Good
Poor
IS2PH150A_01_07.doc
RX CH3
RX CH1
RX CH3
TX CH2
TX CH4
Optic finder
for alignment
Vertical adjustment
(fine)
Horizontal (fine)
Adjustement
Voltmeter (-)
Attenuation
sheet
10