R&S 4200 Series - Behavior at Remote Control; Behavior in Case of Device Errors

Main/Standby Operation (1:1) R&S XU 4200
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3.6.1.2 Behavior at Remote Control
Description
When the command "MS_GO" has been sent via remote control, the radio
switches to ACTIVE state irrespective of the previous state. Referring to the
settings mentioned above, the radio which got this command becomes
active and the partner device (cross-connected via X5) becomes inactive.
The "MS_GO" command is ignored by the radio if at least one of its
modules is set to OFF state. A radio can be set to OFF or to AUTO state
using the "MS_AC" command. When the command "MS_AC" with the
“OFF” parameter was sent via remote control, the radio switches to
INACTIVE state irrespective of the previous state. The partner device (X5 or
X10) gets ACTIVE if it is in AUTO state.
There are different ways to switch between the radio states. Using the
remote control mode, it is possible to send the "MS_GO" or "MS_AC"
command to toggle the radio state. In the local mode, it is possible to
change the activation state of the radio. After leaving the local mode, the
radio will keep this state.
3.6.1.3 Behavior in Case of Device Errors
Description
If an error or NOGO warning occurs on the "Main" radio, the "Standby" radio
will be activated via the TEST_OC line. The "Standby" device will
become active and switches the "Main" radio inactive using the cross-
connected *OFF line.
If an error disappears on the inactive "Main" radio, the "Standby" radio will
stay active. In case there will be an error on the active "Standby" device, a
switchover to the "Main" radio will be done if no error is active on this radio.
Device 1 "Main" Device 2 "Standby"
Display LED Display LED
Stable State after
booting
See Fig. 3.69
Active device
VOP = active
GO = active
See Fig. 3.70
Inactive device
VOP = inactive
GO = active
Error or NOGO
warning on
Device 1 after
main/standby
switchover
See Fig. 3.70
Inactive device
VOP = inactive
GO = inactive
See Fig. 3.69
Active device
VOP = active
GO = active
Fig. 3.73 Main/Standby status after booting and main/standby switchover.