
SRG-4500 User Guide (v7.0)
GPS Option • 143
c. The number of points to be checked depends on the GPS antenna system installed. Some systems may have
addition components such as lighting protection, in line amplifiers, etc.
3. Are the connectors in good shape? Keep the following in mind:
a. Are all the connections in good shape - any corrosion or moisture inside?
b. Is the outer jacket of the connector in good shape? Is there any fraying at the connector?
c. Are all connectors seated properly?
4. Is the GPS antenna connectors in good shape?
d. Are outside connectors protected from moisture ingest?
e. Is the weather dome of the GPS antenna showing signs of cracking or other issues?
Check the +5V Current Flow
To troubleshoot the voltage throughout your GPS setup:
1. Disconnect the GPS cable from the SRG-4500 rear panel.
2. Use a voltmeter to measure GPS connector center pin to outer shell. Keep the following in mind:
• If there is not +5V, this indicates that an over current event occurred in the antenna system. When an over
current event occurs, it trips the circuit protection, which then requires a power cycle of the SRG-4500 to
restore the +5V antenna supply. The SRG-4500 can 5V at 50mA.
• If this happens on a regular basis, it indicates that there is a fault in the antenna system (moisture in cable,
faulty antenna, issue with any in-line amplifier that may be present, etc.).
3. If a 5V is not present:
a. Leave the GPS cable disconnected.
b. Power down the SRG-4500 for 30-60 seconds.
c. Power up the SRG-4500 .
d. Check if the +5V is now present on the frame GPS connector.
e. If so, problem is likely with the antenna system.
4. If 5V is present at the SRG-4500 rear panel, verify that +5V is also present at the GPS antenna:
a. Remove the cable from the GPS antenna,
b. Use a voltmeter to check the FME plug from center pin to outer shell.
c. If +5V is not present, the problem may be with the cable or other components of the antenna system.
d. If +5V is present, the problem may be the GPS antenna.
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
TNC Plug
SRG-4500
TNC Jack
SMB Jack
FME Plug
FME Jack
GPS Antenna
Check for the +5V
Check for the +5V
Check for the +5V
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...