RDL-3000
INSTALLATION GUIDELINES
70-00159-01-06
Proprietary Redline Communications © 2012
Page
64
of 65
kune 12, 2012
6.2.2
Configure Synchronization Settings
Installing the synchronization cabling does not automatically synchronize the RDL-3000
sector controllers. The port settings for the 'sync talker' and each 'sync listener' must be
set correctly. Also, all geographically collocated sites must be operating using identical
wireless frame and downlink ratio settings. Table 20: Spec. - Synchronization Settings
describes the configuration settings for each sector controller.
The PPS port (TNC / F) connector is software configurable. Configuration settings can
be used to enable or disable the port, set operation as input or output, and set the port
termination impedance.
Sync Talker
Configure one RDL-3000 as the 'sync talker'. Set the Synchronization Mode to 'None' (or
'Internal GPS' if a GPS module is installed), and the Synchronization Output to 'Enabled'.
This unit will transmit synchronization pulses on the PPS port.
Sync Listeners
Configure all other interconnected RDL-3000 units as 'sync listeners'. Set the
Synchronization Mode to 'External' and set the Synchronization Output to 'Enabled'.
These units will receive synchronization pulses on the PPS port.
Sync Cable Termination
The RDL-3000 'sync listener' that is last in the daisy-chain (no Tee connector) must be
set to match the synchronization cable impedance (50 ohm for LMR-195).
Table 20: Spec. - Synchronization Settings
Setting
Sync
Talker
Sync
Listener
Description
Fixed Frame
Enabled ( )
All collocated sector controllers operating in fixed
frame mode must use identical settings for the
frame size and downlink ratio.
Note: There are restrictions on the DL ratio
setting based on the frame size and channel size
selections. Refer to the Frame Size and DL Ratio
settings in the User Manual.
Frame Size
Same for all sector
controllers.
Downlink Ratio
Same for all sector
controllers.
See description.
Synchronization
Output
Enabled ( )
Enable the PPS port on sector controllers that
are to be synchronized.
Synchronization
Mode
None
or
Internal
GPS
External
None/Internal GPS: This is the 'sync talker'. If a
GPS module is installed (and tracking) the PPS
output is synchronized to the GPS signal.
External: This is a 'sync listener'. These units
synchronize to the received PPS signal.
Synchronization
Output
Termination
None
See
description.
Sync Talker:
None
Sync Listener(s) with tee:
None
Listener without tee:
50 Ohms
