Philips SPENDEX 40 Maintenance Manual page 18

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S P E N D E X 4 0 U A 8 2 5 1 / 0 0 A N D / O l L I M I T E D M A I N T E N A N C E M A N U A L
4 . 3 . 8 F i l l - g u n i n t e r f a c e
This interface takes care of the coupling between the equipment and a
key variable loading device. When the key variable loading device is
removed at a moment that the equipment is in a state, in which the
key variable loading device should be connected, the interface will
produce a FILL-alarm (FILAL).
4 . 3 . 9 D a t a i n t e r f a c e
The data interface takes care of the coupling between the equipment
and a Data Terminal Equipment in accordance with CCITT-recommendation
V24/V28 or EIA-standard RS232-C.
4 . 3 . 1 0 C l e a r / s e c u r e r e l a y
The clear/secure relay RE3 is energised as soon as the SECURE push
button is pressed or the comsec controller activates the
CLRSEC-signal. The comsec controller will activate the CLRSEC-signal
after the other party has pressed the SECURE push button.
4 . 3 . 11 A n a l o g u e - l o o p r e l a y
For test purposes the comsec controller can energise the
analogue-loop relay RE2 by means of the STRE2-signal, as a
consequence of which (if clear/secure relay RE3 is energised) the
vocoder output is connected with the vocoder input.
4 . 3 . 1 2 P o w e r s u p p l y c o n v e r t e r s
The power supply converters convert the +12 V and -12 V supply
voltages into supply voltages of +5 V and -5 V for a number of
analogue circuits.
4 . 3 . 1 3 Z e r o i s e s w i t c h
As soon as the front panel is removed the zeroise switch is opened,
as a consequence of which the zeroise circuit on the key memory board
i s a c t i v a t e d .
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