Menus
When this funct
ion is activated, the CPU determines which hardware and software
options are installed and then configures the following system parameters to a
default state:
Enables all of the installed channels including the LTC channels if Option LTC
is installed
Arms all o f the installed BNC channels as switchover triggers (but not the
LTC channels if Option LTC is installed)
Sets all thresholds to the default values (NTSC for BNC channels, 2 V for
LTC channels if Option LTC is installed)
Disables the Relay Check function
Disables
the SPG input trigger function
Sets the Startup Delay setting to 15 seconds
FORCE RELAY PATH. Select this menu item and press the left (◄)orright(►)
arrow button to enable or disable the Force Relay Path function for all installed
REF (ELSW) channels. Press the ENTER button to implement the selection.
CAUTION. The Force Relay Path function is intended only for troubleshooting
when the instrume nt is not in service. If the Force Relay Path function is asserted
and a
channel threshold level is set incorrectly, it is possible to make the ECO8000
Series continuously toggle between the primary and backup sources.
The
REF option channels (Electronic 50 MHz Fast switch “ELSW” channels)
have two signal paths: an electronic switch path that works when the power is
on and a backup path via latching relays that takes over whe n the instrument
is turned off or loses power. When the FORCE RELAY PATH menu option is
enabled, this allows the relay path to be used while the instrument power is
on. This function is useful for troubleshooting but is generally not helpful or
u
seful for normal operation. This mode is automatically reset to “Disable” if the
instrument power is removed.
DIAGNOSTICS. Select this menu item and press the ENTER button to access
the DIAGNOSTICS submenu, which you can use to view various instrument
diagnostics. (See page 89, DIAGNOSTICS submenu.)
ECO8000 Series Automatic Changeover Unit User Manual 71
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