Comtech EF Data DD240XR Rev Е - Manual (Page 101)

DD240XR High-Speed Digital Demodulator Electrical Interfaces
MN-DD240XR – Rev. E 5-13
TEST - The following new items are available under the Test menu
ETH DEST MAC {XXXXXXXXXXXX}
This field allows the operator to enter a Destination MAC
address to be used by the Ethernet Data Interface.
When this field is non-zero, the Ethernet Data Interface
will use this value for the Destination MAC address
instead of trying to resolve the Destination MAC address
in the normal manner. When this field is zero, the
Ethernet Data Interface will resolve the Destination MAC
using ARP for Unicast IP Addresses and automatic
construction for Multicast IP Addresses.
ETH TEST DATA {ENABLED / DISABLED}
This field allows the operator to test LAN connectivity
and routing without requiring an input IF signal for the
DD240 to demodulate. When enabled, the Ethernet
Data Interface will generate a test MPEG stream at the
programmed data rate. This test stream consists of
MPEG packets with the following contents:
 Sync byte (0x47)
 Second byte that increments once per MPEG
packet
 186 data bytes that are a running counter that
increments each byte across all MPEG packets
The Ethernet Data Interface will lock to this stream as
though it were actual demodulated data and generate the
appropriate UDP, RTP, and FEC packets depending up
the operational mode.