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GSS7725 Interference Generator User Manual
© Spirent Communications plc 2002-2017
4-1
Chapter 4: Hardware configuration
Note
:
1) This chapter describes the GSS7725 using single signal generator with one RF output
2) If the GSS7725 is being added to an existing
Spirent GSS signal generator a new
sig_gen.txt
file is required to describe the new configuration as well as a new licence file lservrc.txt
3) For use with GSS9000 a Cal_9 will also be supplied. This file describes the path loss and delay
through the GSS7725 and connecting cable.
4) For use with GSS7000 a Cal_7 will also be supplied. This file describes the path loss and delay
through the GSS7725 and connecting cable.
4.1 External reference
Spirent recommends you lock your GSS7725 to an external 10 MHz reference and optionally a 1
PPS source, both these signals are output from a Spirent GSS signal generator.
Connect the external 10 MHz reference to the 10MHz
port found on the back of the GSS7725.
4.2 Connectivity
The following sections show the interconnect diagrams for simple configurations of the GSS7725
with the Spirent GSS signal generators. Each diagram shows the GSS7725 at the top. The
GSS7725 has its own controller separate from any controller required for the Spirent GSS signal
generators
The new
sig_gen
.txt, lservrc.txt and (if required) Cal_9 or Cal_7 file should be loaded onto the
PosApp controller required for the Spirent GSS signal generator or directly onto the Spirent GSS
signal generator (GSS6300Mi and GSS7000). Spirent recommends that you first rename the old
files so that they can be reused if returning to the original configuration.
The
sig_gen.txt
and
lservrc.txt
should be loaded to “
D:\posapp\conf”
(GSS7000, GSS9000) or
“C:\\Spirent Communications\Positioning Application”
If required the
Cal_9
or Cal_7 file should be loaded to “
D:\posapp\conf\system data\”
Wide Area Network (WAN) connections with internet access are required for Spirent Global Service
team to provide remote support.
4.3 GSS6300Mi
WAN
Figure 1 GSS6300Mi & GSS7725 Hardware Connectivity
GSS7725
Controller
Ethernet
