
136 • GPS Option
SRG-4500 User Guide (v7.0)
Figure 16.5 GPS-4500-8M, GPS-4500-35M — Connection without an External Line Amplifier
Figure 16.6 GPS-4500-100M — Connection without an External Line Amplifier
Connection with a Line Amplifier
The SRG-4500 can be used with an external Line Amplifier when a long cable run is required. Because of the
internal LNA, the overall gain (including signal losses past the external Line Amplifier) should not exceed 35dB.
Levels higher than that can affect the jamming detection capability of the SRG-4500.
The external Line Amplifier should have a noise figure better than 1dB. This will give an overall system noise
figure of around 2dB. The external Line Amplifier, if having no pre-select filter, needs to be able to handle other
signals other than the GPS/GLONASS signal. These signals are typically at much higher levels. The amplifier
needs to stay in the linear region when presented with these other signals. Again, the system designer needs to
determine all of the unintended signals and their possible levels that can be presented and make sure the external
Line Amplifier will not be driven into compression. If this were to happen, the GPS/GLONASS signal itself would
start to be attenuated and the GPS/GLONASS performance would suffer.
The external Line Amplifier needs a source of power. It may get this from the 5 volt DC voltage on the antenna
cable or an external PSU.
GbE / PTP
100-BaseT
GPS
1Hz
10MHz IN 10MHz WK/TTL1 WK/TTL2 6Hz/TTL3
DARS
AES 1
AES 2
BALANCED AUDIO/AES/LTC
COMPOSITE
BLACK 1
REF LOOP
TRI/BLACK 2
TRI/BLACK 3
TRI/BLACK 4
SDI 2 BLACK
SDI 1
SDI 1 BLACK
SDI 2
SDI 4 BLACK
SDI 3
SDI 3 BLACK
SDI 4
Coaxial Cable (26ft / 8m)
TNC Plug
FME Plug
FME Jack
GPS Antenna
SRG-4500
Adapter Cable (5in / 130mm)
TNC Jack
SMB Jack
GbE / PTP
100-BaseT
GPS
1Hz
10MHz IN 10MHz WK/TTL1 WK/TTL2 6Hz/TTL3
DARS
AES 1
AES 2
BALANCED AUDIO/AES/LTC
COMPOSITE
BLACK 1
REF LOOP
TRI/BLACK 2
TRI/BLACK 3
TRI/BLACK 4
SDI 2 BLACK
SDI 1
SDI 1 BLACK
SDI 2
SDI 4 BLACK
SDI 3
SDI 3 BLACK
SDI 4
Coaxial Cable
(328ft / 100m)
SRG-4500
Coaxial Cable (26ft / 8m)
FME Plug
FME Jack
GPS Antenna
TNC Plug
Adapter Cable (5in / 130mm)
TNC Jack
SMB Jack
Summary of Contents for 4500DR-104-07
Page 1: ...SRG 4500 User Guide...
Page 12: ...viii Contents SRG 4500 User Guide v7 0...
Page 20: ...20 Before You Begin SRG 4500 User Guide v7 0...
Page 38: ...38 Functional Check Procedures SRG 4500 User Guide v7 0...
Page 42: ...42 Getting Started SRG 4500 User Guide v7 0...
Page 92: ...92 Front Panel Menu System SRG 4500 User Guide v7 0...
Page 100: ...100 Troubleshooting SRG 4500 User Guide v7 0...
Page 128: ...128 4K UHD BNC Connections SRG 4500 User Guide v7 0...
Page 154: ...154 PTP Option SRG 4500 User Guide v7 0...
Page 160: ...160 Service Information SRG 4500 User Guide v7 0...