User's Manual Part 2

Modulator Module Interface

SCADA Communications Interface

Power Supply Module Interface

Signal Name Backplane Backplane Signal Type Description

Modulator Pin

Modulator Interlock J19-27B J18-1C Discrete Contact Provides a pull down to indicate that the

Closure Input modulator module is installed. A low level

indicates the module is installed

Unlock Mute J19-28B J18-1B Discrete Open A low indicates the modulator PLL is

Collector Input unlocked.

External IF present J19-32A J18-1A Discrete Open A low indicates the external IF CW is present

Collector Input to the modulator

Video Loss J19-1B J18-2A Discrete Open A low indicates video loss at the modulator

Collector Input input

Signal Name Backplane Backplane Signal Type Description

P.S. Pin

P.S. Good J19-2A J26-5 Discrete Open A low indicates that the +10.8 DC power is

Collector Input operating properly

P.S. Enable J19-3A J26-4 Discrete Open A low enables the +10.8 DC power supply

Collector Output

Signal Name Backplane Backplane Signal Type Description

SCADA Pin

+ Serial Line J19-26C J15-4, J16-4 + RS-485 Communication Provides the + differential line for the

line bidirectional RS-485 communications

- Signal Line J19-28C J15-5, J16-5 + RS-485 Communication Provides the - differential line for the

line bidirectional RS-485 communications