User`s manual

Installation P ULSAR BG
Page 4-6
4.3.2.2 Status & Control
The lower row of the screw terminal is used as a status & control connector. Via these hard contacts
(TTL level) it is possible to control certain parameters of the modulator.
PIN Function
1 MAIN / AUX output
2 B input MAIN sound coder control *
3 A input MAIN sound coder control *
4 B input AUX sound coder control *
5 A input AUX sound coder control *
6
RF OFF input; active low
To disable the RF output, overrules all other settings
7
FORCED PRESET input; active low **
This pin forces the modulator to switch to the forced preset. All other input selections
are overruled, also the AUX input pin 8.
8
FORCED AUX input; active low
Selects the auxiliary input, whatever the selection on the front with the MAIN, AUX or
AUTO key is.
9
ALARM output; active high ***
Whenever there is an alarm, the output becomes high
Video Fail
Video Low (AGC out of range)
Converter PLL unlock
PLL vision carrier unlock
Substitution input is selected (input AUTO/AUX)
Forced preset active
RF output OFF
White limiter active
Malfunction
10 Not connected
11 Not connected
12 Ground
* Sound coder control
MONO MONO + P STEREO DUAL SOUND
A0 0 1 1
B0 1 0 1
** To save settings to the forced preset memory push the four arrows simultaneously.
*** From ROSA 1.5 on the alarm that activate pin 9 can be configured.
AUDIO INPUTS
STATUS & CONTROL
I
II
121