Electronika LDMOS UHF SERIES User Manual page 32

TELEMEASURES
The J9 telemeasure connector (10 pins socket) is directly wired on a DB9 female connector placed on the
rear panel. There are input and output digital lines (TTL level) and analog output lines on this connector, which
are used to monitor and control the amplifier by means of a general-purpose remote control system.
The correspondence between the pins of the J9 connector on the board and the DB9 female connector on the
rear panel, as well as the meaning of the various lines, is shown in table 3 below (the directions are in respect
to the micro-controller on the board).
PIN N°
ON DB9
1
2
3
4
5
6-7
8
9
(*) You can select by means of two jumpers on the board (JP1 and JP2) RMS or peak power. If there are two jumpers on pins 1 and 2 of
JP1 and JP2 connectors, RMS power is selected. Otherwise, if there are two jumpers on pins 2 and 3 of the same connectors, peak power
is selected.
The input stage of the digital pins has an internal pull-up towards the 5V power supply voltage. To use these
lines it only takes setting a switch to close to earth. When closed, the relevant control (turning on or off) is
enabled and the switch may be open again (impulse controls).
The interlock pin may be used as protection so that the amplifier is switched off when the digital input level is
low. It is possible to use several serially connected switches to make an interlock chain. Usually all switches
are closed and the interlock level is low, thus the amplifier is on. If even only one of the switches is open, the
122
PIN N°
TYPE
ON J9
1 Analog
3 Analog
5 Analog
7 Digital
9 -
2-4 Digital
6 Digital
8 Digital
Table 3: Description of the telemeasures connector
DIRECTION
Output Forward power
Output Reflected power
Output Temperature
Interlock:
Input 0V = Interlock Alarm
5V = Normal
- Ground
Free Contact
Output
(closed when amplifier is in alarm)
Turning-on control
Input
(normally high, active when low)
Turning-off control
Input
(normally high, active when low)
DESCRIPTION
(*)
(*)