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ADCP-75-214 • Issue 2 • September 2006

Page 13

© 2006, ADC Telecommunications, Inc.

4.1

Troubleshooting

1. Observe and record PDU LED status. Disable or disconnect RF from BTS. Remove any surge

protectors. Disconnect Bias-T from the antenna feedline / hardline / jumper / protector.

 

2. Multimeter checks:

a. Measure voltage on the Bias-T _______ VDC. Normal is 15 VDC.

 

b. Measure resistance of the feedline _______ Ohms. Normal is High or Very high 

Ω

(K

Ω/ΜΩ)

. 

 

3. Antenna/cable analyzer checks. Measure the 

in-band

 RL/VSWR of the system ______ dB

or ratio. Check distance to Fault for anomalies.

 

PDU

FEED LINE

PDU

FEED LINE

Содержание ClearGain 1800

Страница 1: ...ADCP 75 214 Issue 2 September 2006 1383772 Rev A ClearGain 1800 MHz and 2100 MHz Dual Inline Tower Mounted Amplifier System User Manual ...

Страница 2: ...rther disclaims any and all liability for indirect incidental special consequential or other similar damages This disclaimer of liability applies to all products publications and services during and after the warranty period This publication may be verified at any time by contacting ADC Technical Assistance Center at 1 800 366 3891 extension 63475 in U S A or Canada or 952 946 3475 outside U S A a...

Страница 3: ... 2 Masthead Unit Installation 3 2 3 PDU Installation 6 2 4 Bias T Installation 10 3 TROUBLESHOOTING 11 4 TROUBLESHOOTING 4 PORT CLEARGAIN DUAL INLINE DUAL DUPLEX TOWER MOUNTED AMPLIFIERS 12 4 1 Troubleshooting 13 4 2 Troubleshooting Hints 14 4 3 Troubleshooting Flowchart For Systems With Three Port MHUs 15 4 4 Troubleshooting Matrix 16 4 5 Return Loss Sweep Guide 17 5 SPECIFICATIONS 18 5 1 1800 Ma...

Страница 4: ...ADCP 75 214 Issue 2 September 2006 Preface Page iv 2006 ADC Telecommunications Inc Blank ...

Страница 5: ...y or damage and likelihood of occurrence CERTIFICATION The ClearGain 1800 and 2100 MHz Dual Inline TMA have been tested and found to comply with the requirements of EN60950 The ClearGain 1800 and 2100 MHz Dual Inline TMA have been tested and found to comply with all applicable CE Directives STANDARDS The following is a listing of applicable regulatory standards Danger Danger is used to indicate th...

Страница 6: ...RONYMS AISG Antenna Interface Standards Group ANT Antenna AWG American Wire Gauge BTS Base Transceiver Station LED Light Emitting Diode LNA Low Noise Amplifier MHU Masthead Unit OOK On Off Key PDU Power Distribution Unit RET Remote Electrical Tilt RF Radio Frequency TMA Tower Mounted Amplifier ...

Страница 7: ...in a typical application on a communications tower Figure 1 Functional Components of a ClearGain TMA System One PDU may support up to three dual inline MHUs of the same frequency Each MHU requires a separate Bias T The ClearGain TMA system also includes power cables and alarm cables MASTHEAD UNIT MHU BASE TRANSCEIVER STATION 21297 B ClearGain PDU DUAL INLINE BTS ANT DC Bias T kit Freq 800 2200MHz ...

Страница 8: ...h gain with a low noise figure The ClearGain TMA system provides visual and dry contact output alarming and lightning protection Figure 2 depicts how the system components are involved in system function Figure 2 System Function BTS A ANT B BASE STATION MHU 21305 B ClearGain PDU RF SIGNALS POWER JUMPER CABLES SITE ALARM DC POWER FAULT DETECTION DC POWER FAULT DETECTION ANTENNA COAXIAL CABLE RX TX ...

Страница 9: ...data bus is a two wire bi directional configuration and can be used for RS 485 communications link between the BTS and PDU The OOK modem is AISG standard compliant Bias T located on the coaxial cable is a passive device that physically injects DC power onto the coaxial cable to provide powering for the MHU Bias T may be installed indoors or outdoors There are four Bias T connector options 7 16 DIN...

Страница 10: ...lamps on pole and route through the mounting openings near the center of the MHU 4 Position MHU at the desired location and tighten clamps securely 2 2 1 Installing the MHU Ground Cable Good grounding of the ClearGain MHU is important to protect the unit against voltage surges These surges may be caused by lightning or inadvertent contact with high voltage power lines Install the ground cable as f...

Страница 11: ...ions are tight and clean Keep ground cables as short as possible 2 2 2 Installing Coaxial Cables Four short coaxial jumpers should be pre made Two will connect the BTS ports to the hard line and the other two will connect the ANT ports to the antenna Most installations require four good quality flexible coax jumpers normally terminated with 7 16 DIN 7 16 DIN connectors Check gender of hard line an...

Страница 12: ... Standard Wall Mount When mounting the PDU on a wooden or metal surface it is recommended that it be installed on a secure surface 2 3 1 2 Masonry Wall Mount When mounting the PDU on a masonry surface it is important that the bolts especially the upper bolts be located as close as possible to the center of bricks or blocks Masonry mounting screws are not provided Warning Never install the Power Di...

Страница 13: ...vailable that allows the PDU to be mounted in a rack If mounting PDU in a rack refer to the installation drawing provided with the mounting bracket Figure 5 PDU Rack Mount Bracket 2 3 2 Installation of PDU Cables There are fife PDU cables Power cable Alarm cable Communication cables MHU Bias T cables Ground cable 21300 A RACK MOUNTING BRACKET ...

Страница 14: ... leads to the base station or site alarm system Use either Normally Open or Normally Closed contacts Figure 7 shows the PDU alarm logic 3 Connect the other end of the alarm cable to the PDU ALARM connector 4 Connect communication cable leads to the base station or site control systems to control RET The data bus is a two wire bi directional configuration and is used for the RS 485 communications l...

Страница 15: ...nnect unused MHU output see Figure 8 For the MHU outputs that are used the DIP switch must be in the down position or ON Unused outputs must be disconnected by setting DIP switch in the up position Switch 1 and 3 Set to ON to Indicate Use of MHU Ports 1 and 3 Figure 8 Example of DIP Switch Setting on the PDU RS485A RS485B POWER DISTRIBUTION UNIT DC INPUT PDU ALALRM LOGIC NO NORMALLY OPEN COM COMMO...

Страница 16: ... connector MHU1 3 whichever is being used 5 Connect the ground cable to the Bias T ground terminal see Figure 9 6 Connect the other end of the ground cable to the site grounding pole Figure 9 Bias T Ground Cable Connection 2 4 2 Additional Lightning Protection ADC recommends that the operator install further lightning protection between the MHU and Bias T It must allow the DC voltage to pass throu...

Страница 17: ...tput has a status LED Status LED for each MHU that is in use should be GREEN 3 Disable or disconnect any unused MHU ports to prevent false alarm conditions 4 Verify that DC voltage is present at the MHU port on the PDU Disconnect the MHU Bias T cable and measure output voltage using a multimeter Voltage measurement DC Nominal DC output power should be 14 16 VDC 5 Verify that DC voltage is present ...

Страница 18: ...ts to see if trouble remains or moves reference Figure 8 See Figure 10 for possible trouble points Figure 10 Tower Mounted Amplifiers 21299 A MASTHEAD UNIT MHU FEEDLINE JUMPERS ANTENNA JUMPER HARD LINE SHELTER HARD LINE TEST POINT NOTE COMMON FAILURE POINTS ARE THE ANTENNA AND FEEDLINE JUMPERS CONNECTORS CHECK IF EXTERNAL JUMPERS OR SURGE PROTECTORS ARE PRESENT IF A SURGE PROTECTOR IS ANYWHERE BET...

Страница 19: ...Disconnect Bias T from the antenna feedline hardline jumper protector 2 Multimeter checks a Measure voltage on the Bias T _______ VDC Normal is 15 VDC b Measure resistance of the feedline _______ Ohms Normal is High or Very high Ω KΩ ΜΩ 3 Antenna cable analyzer checks Measure the in band RL VSWR of the system ______ dB or ratio Check distance to Fault for anomalies PDU FEED LINE PDU FEED LINE ...

Страница 20: ...rformance 4 2 Troubleshooting Hints If voltage is outside of the normal range trace it back towards the fault If no resistance or low resistance check protector feedline jumpers and MHU If an infinite resistance reading sometimes indicated by OL check to see if MHU is installed or for a discontinuity exists up to the MHU Normal in band RL should be greater than 18dB If less than 18dB check protect...

Страница 21: ...IVITY TO THE CHECK MHU PORT FOR 18VDC IF NOT PRESENT REPLACE PDU CHECK BIAS T CABLE FOR 18VDC IF NOT PRESENT REPLACE BIAS T CABLE CHECK BIAS T FOR 18VDC IF NOT PRESENT REPLACE BIAS T CHECK RESISTANCE OF FEEDLINE LO OHMS OR SHORTED PROBLEM TOP SIDE HI OHMS OR OPEN IS NORMAL BUT ALSO MAY INDICATE A DISCONTINUITY CHECK SUPPLY IS 56 to 20 VDC or 20 to 56 VDC The red lead is connected to the higher pot...

Страница 22: ...atrix PARAMETER SPECIFICATION EXPLANATION GREEN YELLOW OK LED RED GENERAL ALARM LED Electronic Load Each Path OFF 180 mA Fail OFF ON Each Path ON 180 220 mA OK GREEN OFF Total Fail 370 400 mA Fail OFF ON Short Circuit Protection 1 5 A 10 Fail GREEN ON Short state of MHU path does not affect other path After generating Green alarm the short state is held for ten seconds then Red alarm is generated ...

Страница 23: ...GOOD BAD RESISTANCE LOOKING INTO THE FEEDLINE SHOULD INDICATE HIGH OR INFINITE OHMS GOOD BAD NORMAL IN SYSTEM SWEEP TYPICAL DEGRADATION FROM NORMAL SYSTEM SWEEP RL IS STILL GOOD IN RX BAND RECOMMEND CONNECTOR LINE ANTENNA CHECKS DURING NEXT SCHEDULED MAINTENANCE PERIOD WHEN TOWER CREW AVAILABLE ANTENNA PORT TERMINATED WITH 50 OHM LOAD PERFECT ANTENNA 50 OHM LOAD ANTENNA PORT ANTENNA CATASTROPHICAL...

Страница 24: ...dB Power Handling Capability 200W Return Loss 18 dB LNA with filter Gain 12 1 dB Noise Figure 1 6 dB IIP3 13 dBm Bypass Loss 2 0 dB Physical Dimensions W x H x D 189 0 x 336 0 x 90 0 mm 7 4 x 13 2 x 3 5 inches Weight 6 9 kg 15 2 lbs Color Gray Metallic Connectors Antenna Connector 7 16 DIN Female BTS Connector 7 16 DIN Female Intermodulation Intermodulation 115dBm 2x20W Power Operation Voltage 15 ...

Страница 25: ...r Handling Capability 200W Return Loss 18 dB LNA with filter Gain 12 1 dB Noise Figure 1 7 dB IIP3 13 dBm Bypass Loss 2 0 dB Physical Dimensions W x H x D 166 0 x 210 0 x 80 0 mm 6 5 x 8 3 x 3 2 inches Weight 4 2 kg 9 3 lbs Color Gray Metallic Connectors Antenna Connector 7 16 DIN Female BTS Connector 7 16 DIN Female Intermodulation Intermodulation 106dBm 2x20W Power Operation Voltage 15 VDC Opera...

Страница 26: ...tor Molex Micro fit 43045 0400 General alarm connector Molex Mini Fit 39 30 3035 Communications link between BTS and RET Molex Mini Fit 39 30 3035 Indicators Two color LED 3 pcs green and yellow Red LED 1 pcs Physical Dimensions W x H x D 194 4 x 43 6 x 100 0 mm 7 7 x 1 7 x 3 9 inches Weight 0 5 Kg 1 2 lbs Color Gray Metallic Communication Pin Number Signal Comments 1 RS485 A RET control command A...

Страница 27: ... to DC port 30 dB Inter modulation 3rd order 2x20W tones 108 dBm DC Path DC Input Voltage 5 24 V Input Current 0 2 A DC Path Resistance 1 Ohm Physical Dimension HxWxD mm 55 5 x 95 0 x 40 0mm 2 2 x 3 7 x 1 6 inches Weight 0 3 Kg 0 7 lbs Color Gray Metallic Housing Aluminum Environmental Operating Temperature 40 to 65º C 40 F to 149 F Storage Temperature 40 to 70º C 40 F to 158 F Outdoor Protection ...

Страница 28: ...Extension 73476 ASIA PACIFIC Sales Administration 65 6294 9948 Technical Assistance 65 6393 0739 ELSEWHERE Sales Administration 1 952 938 8080 Technical Assistance 1 952 917 3475 Italy 0800 782374 PRODUCT INFORMATION AND TECHNICAL ASSISTANCE Contents herein are current as of the date of publication ADC reserves the right to change the contents without prior notice In no event shall ADC be liable f...

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