User's Manual

2-13 Installation
DataNex EMS Wireless, DATA-20 Digital Radio
Note: Manual switching of the Master is often used to force the system over to the standby unit.
The user may want to put more “time” on the standby unit after an extended period of
service. In Hot Standby configurations, this will not buy the user anything in terms of
reliability. In Cold Standby, the “burn time“ is more significant, since the RF power
amplifier device operating life becomes a factor.
2.9.2.3 DATA-20 Software Settings
The full array of available settings for the Control and Configuration menus are located in Section
3—Operation of the Front Panel. Shown here are the applicable settings for redundant standby
systems.
Clock Settings
For proper operation, the clock settings (located in the QAM Radio/Config/Modem Menu) must be
set as follows:
QAM Interface
Intfc
TRUNK
Tx In Clock
Clk Phase
INVERTED
Rx Clock Out
Clk Phase
NORMAL
Trunk Out
Clk Source
Clk Phase
EXTERNAL
NORMAL
Control Settings
These settings configure the transmitter for hot (or cold) standby.
It is important that each DATA-20 radio in the redundant pair is configured identically for proper
operation.
In the SYSTEM TRANSFER menu:
Transfer
Tx Transfer
______
Rx Transfer
______