Setup Manual

Device View Description
R&S
®
Tx9
151Operating Manual 2109.9110.02 ─ 07
Seamless switching
The automatic input signal switchover function has an operating mode which permits
seamless switching between two inputs. Seamless switching is activated using the
"Seamless" switch. If seamless switching is possible, the switchover always takes
place immediately, irrespective of the set guard times. Seamless switching is available
without restriction for operation in single‑frequency networks (SFN). For operation in
MFNs, it is necessary to set the maximum expected delay time between the two signal
feeds. The signal which arrives earlier is delayed by the set time and the signal which
arrives later is adjusted to the earlier signal. The currently measured delay between the
two inputs is displayed to provide an adjustment aid. In SFN and MFN mode, signals
can be fed via two different media (e.g. ASI and IP).
Manual switchover between inputs
Manual switchover is possible when the automatic input signal switchover function is
both on and off.
●
Switchover with automatic input signal switchover OFF
The input can be switched over in the
"Home" > "Transmitter" > "Exciter" menu by
pressing the input selector switch ("Selector") and then selecting the desired input
"Selected Input".
●
Switchover with automatic input signal switchover ON
The input can be switched over in the "Home" > "Transmitter" > "Exciter" menu by
pressing the input selector switch ("Selector") and then selecting the desired input
"Selected Input" if the two inputs are configured with equal priority (Preferred Input
= None).
If one of the inputs is configured as having priority, switchover is performed by
changing the priority input "Preferred Input" in the same menu.
"Automatic input signal switchover" parameters
Name Description Value range Access right
Automatic (State) Indicates the state of the automatic input signal switchover function.
●
Off:
The automatic switchover function is switched off.
●
Active:
The automatic switchover function is ready to switch the currently
active input over to the input currently not in use as soon as the
input signal of the currently active input fails.
●
Changed:
The automatic switchover function has switched over from the
preferred input to the standby input. "Changed" is only displayed if
switchback is not permitted. ("Switch to" = reserve)
Off, Active,
Changed
Read Only
Seamless Switch-
ing
Indicates whether seamless switching of the input signal is possible.
"Not Possible" appears if only one input signal is fed, if two different
data streams are present at the two inputs or if in MFN mode the set
"Max Delay between Inputs" is not sufficient to align the two signals
with each other. If seamless switching is possible, it always takes place
immediately when required, regardless of whether a "Guard Time to
Reserve" or "Guard Time Back" has been set.
not Possible,
Possible
Read Only
Automatic Activates automatic switchover of the input signal to the standby input
if the preferred input fails.
Off, On Operation
Exciter ATSC