Connecting to an Emergency Alert System (EAS)
Result:
Table 2-3: GPIO/RS-422 Pin Signals and Assignments
Spectrum X pin
ChannelPort pin
Signal
Assignment
RS-422 #1: shell
1
Ground
Ground on Com 2
connector
RS-422 #1: pin 8
2
RS422_RX0_N
RS-422 #1: pin 3
3
RS422_RX0_P
RS-422 #1: pin 7
11
RS422_TX0_P
RS-422 #1: pin 2
10
RS422_TX0_N
Receive/Transmit on
Com 2 connector
GPIO: pin 1
19
GPI 0
Alert Pending
GPIO: pin 2
20
GPI 1
Alert Active
When connecting RS-422 pins from the GPIO/RS-422 connector(s), make sure the polarity matches. For
example, always connect the Rx+ signal to Tx+ and, likewise, connect the Rx- signal to Tx-.
Related information
on page 114
GPIO/RS-422 connector signal assignments
on page 181
Configuring the Monroe DASDEC
Configure the necessary settings for the Monroe DASDEC.
1. Follow the instructions provided by the Monroe DASDEC documentation to set the DASDEC to “Sage
Generic CG” mode.
2. Set the baud rate to 9600, no handshake.
3. To emulate the Sage you must connect two GPIs to the same relay connection on the DASDEC. The
GPI assigned to Alert Pending must be a lower signal number than the one used for Alert Active. In
the detailed view of the sample installation, GPI 0 and GPI 1 are used. Note that it does not matter
which GPIO is used nor its name.
4. Configure the GPI triggers in SystemManager or Spectrum Management, as described the
Harmonic
SystemManager User Guide
or the Spectrum Management help system.
Note that the GPIO name field in the SystemManager or Spectrum Management serves as a “friendly
name” by which the GPIO signals are referenced.
IMPORTANT:
GPIO trigger names are global across a Spectrum video server.
Therefore, you must use unique names for all triggers on all ChannelPorts, MediaPorts,
or Spectrum X units in your system.
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Spectrum System 8.4 Installation Guide
