User's Manual

Innovator CHV400BTD ATSC Transmitter SNMP Ethernet
Interface Description
Technical Manual, Rev. 0 47
(Optional) Innovator CHVB Series SNMP Ethernet Interface
NOTE: The Innovator CHVB Series SNMP Ethernet Interface (1313079) includes the Web
Ethernet Interface described in the previous section of this manual. These interfaces
may not be part of your system.
The Innovator CHVB Ethernet Controller is available in a version that implements Simple
Network Management Protocol (SNMP). SNMP is a standardized method of transferring
information from one electronic device to another. SNMP is typically used to remotely
control and monitor several transmitter devices from a centralized network management
system (NMS). SNMP is a communication method between two applications and is not a
graphical user interface. Therefore, SNMP functionality is included along with web page
server functionality. SNMP is used to gather information or set control states but it
requires additional computer applications for operator monitoring and control.
The Innovator CHVB Ethernet Controller implements SNMP version 2 (SNMP v2) using a
Management Information Base (MIB). The MIB file defines all SNMP parameters of the
transmitter, specifies the format of data, and orders the presentation of the parameters
using a hierarchical namespace containing object identifiers (OID). Each OID identifies a
variable that can be read, read and set, or only set via SNMP commands.
SNMP functionality also provides for alert messages that are issued from the Ethernet
Controller to one or two network computers. A SNMP trap message is sent only once
and is not acknowledged by the receiving device. The Ethernet Controller issues a trap
message when data is added to the transmitter fault log (either activation of a fault or
when a fault is cleared), or when the transmitter operate/standby status changes.
SNMP Configuration
The Ethernet Controller's TCP/IP Address, Subnet Mask, and Gateway must be
configured with static values that are valid within your network. Dynamic Host
Configuration Protocol (DHCP) is not implemented; however access to these
configuration parameters is available through the front panel setup menus of the
Innovator CHVB.
The Innovator CHVB's SNMP MIB allows up to two SNMP trap destinations. The TCP/IP
address of a trap processing computer is configured through the SNMP parameters
called 'site_trap_adr1' and 'site_trap_adr2'. To clear a previously configured trap
destination and cause the system not to issue traps to a specific address, set the value
to '000.000.000.000'.
Reading of SNMP values is done with the message's community access set to 'public'.
When setting SNMP values, a default community access level of 'private' is used. Future
implementations of the Ethernet SNMP agent may allow for the set community access
level to be defined through the device's web server.