User's Manual

SFFR-6 User Manual
Getting Started
Doc ID: ES1002-UM02-v504 Copyright © 2019 Etherstack Page 17 of 60
2.2.7 Radio Module
The radio module houses two high performance radio transmitters and receivers. These modules are specific to either the
VHF or UHF bands and will be pre fitted based on the band of the GoBox ordered.
2.2.8 Duplexer
The GoBox will be fitted with a duplexer when the single antenna interface is fitted. The duplexer module will be tuned to
the centre frequencies requested at the time of order to maximise RF performance.
Additional duplexers in the same band can be ordered and swapped within minutes. Additionally the GoBox can auto sense
the installed duplexer and select the correct operational profile without any user interaction.
To change the duplexer, ensure the GoBox is turned off and all power sources removed. Remove the duplexer, by turning
the locking screws counter clockwise until the duplexer module can be lift up and out of the GoBox.
When installing a duplexer, take care to ensure that the duplexer is fully inserted. To avoid damaging the module, the
GoBox or the locking screws, do not apply excessive downward force. Alternate between pushing the module in and
turning the locking screws clockwise.
If the GoBox is fitted with separate Rx and Tx antenna connectors (option), a bypass module will be fitted in place of the
duplexer module.
2.2.9 Power Amplifier
The GoBox will be fitted with a power amplifier specific to the band selected.
The GoBox when first unpacked will not have any operational profiles to execute. Until the GoBox has been
configured, the power/status LED will continue to flash, indicating it is in
the programming state.
!
The GoBox radio modules have been designed to run at high temperatures in order to support the power output
and high duty cycles typical of a heavy use repeater/base station. Care must be taken if the GoBox has been
running for several hours supporting a large volume of calls. The front panel of the radio module can exceed 50
o
C.
!
The duplexer may become hot during operation, particularly at high output power or high duty cycles. Care must
be taken if the GoBox has been running for several hours supporting a large volume of calls. The front panel of the
duplexer module can exceed 50
o
C.
!
The duplexer is not hot swappable. You must ensure the GoBox is powered down, batteries removed and all
external power sources disconnected before removing the duplexer module.
!
Power amplifiers are not recommended to be swapped and used in GoBoxes operating in another band as
performance may be impacted.
!
The GoBox power amplifier has been designed to run at high temperatures in order to support the power output
and high duty cycles typical of a heavy use repeater/base station. Care must be taken if the GoBox has been running
for several hours supporting a large volume of calls. The chassis areas located near the handle can get hot. This
includes the heat sink and the top of the case near the front edge.
!