DRAKE ENCODER HOST EH244 Manuel d'instruction - Page 7
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flexible deployments. This allows the optional ASI
outputs to run at higher than the standard QAM data
rates (or lower, if they will be used in conjunction with
an external lower-bitrate modulator)
· ENCODER x: OUTPUT - x – this setting allows
each encoder's output program to be assigned to any
or all of the output channels, by cycling through all of
the options
· MGT/VCT: DISABLED, CVCT, TVCT – this sets
the MGT/VCT table style to the cable (CVCT) or
broadcast (TVCT) standard as needed by the de-
ployment
· VIRTUAL+MPEG #s: DEFAULT, USER DEFINED
– this setting allows the operator to override
the default virtual channel numbers (which de-
fault to RF_channel_number - encoder_in-
dex_number). The user-defined settings must be
set from the ethernet control interface
· QAM OUTPUT x: ENABLED, DISABLED – this al-
lows each individual QAM channel to be disabled in-
dividually
· QAM MODE: QAM-256B, QAM-64B, QAM-256A,
QAM-128A, QAM-64A, QAM-32A, QAM-16A
this sets the output modulation type for all 4 QAM
channels
· QAM SYMRATE: DEFAULT, variable – this
sets the symbol rate for all 4 QAM modulators.
The DEFAULT choice only exists for QAM-256B and
QAM-64B, for which default symbol rates exist
· INTERLEAVER: Variable – this sets the inter-
leaver configuration when the unit is in QAM-256B
or QAM-64B modes
· OUTPUT FORMAT: NORMAL, STANDBY, CW –
this sets the modulator format (CW for adjusting sys-
tem carrier levels, STANDBY to turn off all 4 modu-
lators)
· OUTPUT
CHANMAP:
HRC, IRC – this sets the RF channel number map-
ping style
· OUTPUT CHANNELS: Variable – this selects
the 4 frequency-adjacent RF channels that the QAM
modulator will use for QAM outputs 1-4
· RF OUT: 42-54dBmV – this sets the output level of
all 4 QAM outputs
Ethernet Control Interface
Configuration
There are two options for the ethernet control inter-
face setup. If your ethernet network has a DHCP
server available, and you would like to use that to
CONFIGURATION
–
CATV, BROADCAST,
configure the IP address of your EH244, you may
enable DHCP on the EH244. When the unit's front
panel has exited from configuration mode, you can
press the button above ENTER twice to view the IP
address that was discovered by DHCP.
If your network does not have a DHCP server, or you
choose not to use DHCP for configuration (this is the
recommended configuration, to avoid your EH244's
IP address changing in the future), you must obtain
an IP address, subnet mask, and default gateway
from your network administrator. Once you have de-
termined the correct values for your particular net-
work, set these values from the front panel.
Once the unit has an assigned IP address, you can
view and change its settings from a web browser. For
instance, if the unit's IP address were 10.0.0.1,
you would load http://10.0.0.1 in your web
browser to view and configure your EH244. The
username and password required to log into the unit
are both set from the front panel.
Once the EH244 web server has been loaded from
your browser, you should see the login dialog (see
Fig. 1). Enter the username and password (con-
figurable via the front panel interface) and click LOG
IN.
Figure 1: EH244 Login Dialog
Once you are logged in to the EH244, you will be pre-
sented with the status page (see Figure 2). Along the
top edge of the page, there are five tabs listed; each
tab allows you to view and configure different parts of
the encoder host. The Status tab gives the overall
status of the whole unit, including firmware versions,
output bit-rates for all 4 outputs, output buffer usage,
and links to the relevant encoder manuals.
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