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ADCP-75-214 • Issue 2 • September 2006
Page 20
© 2006, ADC Telecommunications, Inc.
5.3 PDU (Power Distribution Unit)
Table 4 provides typical specifications for the PDU.
Table 4. Power Distribution Unit (PDU) Specifications
CATEGORY PARAMETER SPECIFICATION
Electrical Input voltage range 20–56VDC positive/negative ground
(Input polarization protected)
Output voltage 15V, 4% (Over voltage protection)
Output voltage accuracy 4% in 20mA – 400mAMAX 10% in 1.5A
Output ripple 100mV pk – pk
PDU Inrush Current ETS300132-2, Part 2
Short circuit protection 1500mA, 10%
Connector and
LED
Outputs for TMA's SMB connector Male (3 pcs)
Input connector 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 AISG Layer2. ISO/
IEC 8482:1993 (RS485).
2RS485 B
3 RS485 GND
PDU only receives control command from BTS and modulates 2.176MHz Modem
Signal and transmit to TMA through SMB connector, and vice versa.
Resistance between RS485 A and
RS485 B
> 1k Ohm
Resistance between RS485 A or
RS485 B and DC return / RS485 GND
> 1k Ohm
Capacitance between RS485 A or
RS485 B
< 1nF
Capacitance between RS485 A or
RS485 B and DC/RS485 GND
< 1nF
- ClearGain 1
- 1800 MHz and 2100 MHz Dual 1
- User Manual 1
- COPYRIGHT 2
- REVISION HISTORY 2
- TRADEMARK INFORMATION 2
- DISCLAIMER OF LIABILITY 2
- TABLE OF CONTENTS 3
- ABOUT THIS MANUAL 5
- ADMONISHMENTS 5
- CERTIFICATION 5
- STANDARDS 5
- LIST OF ACRONYMS 6
- 1 PRODUCT OVERVIEW 7
- 1.1 General Description 7
- 1.2 Functional Description 8
- 2 SYSTEM INSTALLATION 9
- 2.1 Installation Overview 9
- 2.3 PDU Installation 12
- 2.3.1.3 Rack Mount (Optional) 13
- POWER DISTRIBUTION UNIT 15
- 2.4 Bias-T Installation 16
- 3 TROUBLESHOOTING 17
- TOWER MOUNTED AMPLIFIERS 18
- 4.1 Troubleshooting 19
- FEED LINE 19
- 4.2 Troubleshooting Hints 20
- GREEN/YELLOW 22
- RED GENERAL 22
- ALARM LED 22
- 4.5 Return Loss Sweep Guide 23
- GOOD BAD 23
- 5 SPECIFICATIONS 24
- 5.1 1800 Masthead Unit 24
- 5.2 2100 Masthead Unit 25
- 5.4 Bias-T 27
- Italy: 0800 782374 28
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