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Microwave Radio Communications DAR Plus Operator's Manual

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Software
Release
1.0
Document: 400468-1
Revision C
September 2003
Table of Contents
Section 1 -
System Overview
Section 2 -
System Installation
Section 3 -
Operating Controls
Section 4 -
Summary Alarms
Appendix A -
Appendix B -
Appendix C -
Operator's Guide
DAR Plus
Analog or Digital
Microwave Radio System
System Connections
Modules
Frequency Settings

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Summary of Contents for Microwave Radio Communications DAR Plus

  • Page 1 DAR Plus Analog or Digital Microwave Radio System Table of Contents Section 1 - System Overview Section 2 - System Installation Section 3 - Operating Controls Section 4 - Summary Alarms Appendix A - System Connections Appendix B - Modules...
  • Page 2 PROPRIETARY NOTICE The information and design contained within this manual was originated by and is the property of Microwave Radio Communications. Microwave Radio Communications reserves all patent proprietary design, manufacturing, reproduction use, and sales rights thereto, and to any articles disclosed therein, except to the extent rights are expressly granted to others.
  • Page 3 Important Safeguards Caution: Grounding or Polarization - AC powered versions of this product are equipped with a 3-wire plug with an integral grounding pin. 1. Read all of these instructions. This plug fits into a standard, grounded power outlet. 2. Save these instructions for later use. If you are unable to insert the plug into the outlet, 3.
  • Page 4 Notes...

  • Page 5: Table Of Contents

    1 System Overview .....................1-1 Introduction ......................1-1 1.1.1 Modulator/Demodulator Options ..............1-1 1.1.2 Operating Controls ..................1-1 DAR Plus Features ....................1-2 1.2.1 Options ......................1-2 1.2.2 Protection Options ..................1-2 1.2.3 Digital or Analog Modulation ................ 1-2 Transmitter Overview .................... 1-3 Figure 1-1 Transmitter Block Diagram ............
  • Page 6 Alarm Indicators ....................4-2 Figure 4-2 Receiver Main Screen with Alarm Window ......... 4-2 4.2.1 LED Definitions ..................... 4-2 Figure 4-3 DAR Plus Front Panel Display and Keypad ......... 4-2 Transmitter Summary Alarms ................4-3 4.3.1 Transmitter Power Supply Alarms ..............4-3 Table 4-1 Transmitter Power Supply Alarms ..........
  • Page 7 Alarm & Connection Referencing ................. 4-6 4.5.1 DAR Plus Transmitter Alarm Reference ............4-7 Table 4-7 DAR Plus Transmitter Alarm Reference Table ......4-7 4.5.2 DAR Plus Receiver Alarm Reference ............4-8 Table 4-8 DAR Plus Receiver Alarm Reference Table........4-8 A System Connections ..................
  • Page 8 Figure B-10 IF Limiter/Amp ............... B-11 C Frequency Settings ..................C-1 Figure C-1 Synthesizer Switch Locations ............. C-1 Table C-1 ..........6 GHz Oscillator Switch Settings C-2 Table C-2 ..........12/13 GHz Oscillator Switch Settings C-2 400468-1 Rev. C viii DAR Plus Operator’s Guide...
  • Page 9 Preface Purpose This manual explains how to install, operate, and configure the DAR Plus Radio. It also provides troubleshooting information in order to remedy common system faults. Audience This manual is intended for qualified installers and service technicians who need to perform the following tasks: •...
  • Page 10 System Overview - Description of the DAR Plus transmitter and receiver. Section 2 System Installation - Describes how to install the DAR Plus and DAR Plus in a standard equipment rack. Also included are power connections for both AC and DC power configurations, as well as how to initially power up the modem.
  • Page 11 2. A unit of measurement, established by the IRE, in which 1 IRE Unit =.00714 volts peak-to-peak (Vp-p) and 140 IRE units equals 1 Vp-p. Kbps Kilobits per second. Kilo (1,000) cycles per second. Liquid Crystal Display Local Light emitting diode. Local Oscillator Loss of Signal. DAR Plus Operator’s Guide 400468-1 Rev. C...
  • Page 12 Volts Direct Current. Voice Frequency. Video A term pertaining to the bandwidth and spectrum of the signal that results from television scanning and which is used to reproduce a picture. Xmitr Transmitter. Xmtr Transmitter. DAR Plus Operator’s Guide 400468-1 Rev. C...

  • Page 13: System Overview

    Section 1 System Overview Introduction The DAR Plus Radio is a versatile STL solution to satisfy a broad range of transport solutions suitable for the following applications: • Studio-to-transmitter links and transmitter-to-studio links • Satellite backhauls • Analog news gathering backhauls (ICR) Intercity Relay •...

  • Page 14: Dar Plus Features

    System Overview DAR Plus Features DAR Plus Features The DAR Plus features proprietary implementation of MRC Broadcast’s extremely stable, low-noise YIG oscillator technology. It provide built-in diagnostics through front panel. 1.2.1 Options • Analog: FMT/FMR 70 MHz, IF, 4 audio subcarriers, high-power output options •...

  • Page 15: Transmitter Overview

    (4 Alarms) 12 GHz LOCAL OSCILLATOR MULTIPLIER AUDIO AUDIO MODULATOR (4 Chan.) DAR_Plus_Tx_BLK_1osc Note 1 - Bit Rate and band width dependant. Contact MRC for available applications. NTSC MODULATOR 70 MHz DAR Plus Cabinet DAR PLUS Operator’s Guide 400468-1 Rev. C...

  • Page 16: Transmitter Chassis Layout

    Transmitter Chassis Layout and Interconnection POWER POWER AMP SUPPLY LIMITER IF AMP MULTIPLIER UPCONTER MULTIPLIER (12 GHz) 6 GHz OSCILLATOR POWER SUPPLY FUTURE QM2 ATSC MODEM (OPTIONAL) AUDIO MODULATOR (A) FM MODULATOR (A) DAR PLUS Operator’s Guide 400468-1 Rev. C...

  • Page 17: Receiver

    LOCAL (4 Alarms) MULTIPLIER OSCILLATOR AUDIO AUDIO (4 Chan.) Demod Note 1 - Bit Rate and band width dependant. NTSC Contact MRC for available applications. NTSC Video 70 MHz Demod DAR Plus Cabinet DAR PLUS Operator’s Guide 400468-1 Rev. C...

  • Page 18: Receiver Chassis Layout

    Connections. Figure 1-4 Receiver Chassis Layout and Interconnection MULTIPLIER (12 MHz) LOCAL OSCILLATOR IF FILTER IF AMP POWER DISTRIBUTION BOARD POWER SUPPLY SPARE ATSC DEMODULATOR (OPTIONAL) AUDIO DEMODULATOR (Analog) DEMODULA T OR (Analog) DAR PLUS Operator’s Guide 400468-1 Rev. C...

  • Page 19: Specifications

    Note: One-hop, 525 or 625 line video per CCIR; -40 dBm receiver carrier level; excludes modem. 1.4.6 Digital Specifications (Optional QM2 Modem) Digital Video Channel Data Rate: .............. 19.39 Mbps (ATSC transport stream) Interface:..................SMPTE 310M, typical DAR PLUS Operator’s Guide 400468-1 Rev. C...

  • Page 20: Electrical

    7.10 to 8.50 GHz: ............Type WR112; CPR @ top of rack 10.70 to 13.25 GHz ..................Type WR75 14.4 to 15.35 GHz: ..................Type WR62 IF/Baseband Connectors:...................BNC Power, Audio & Alarm Connections: ........Barrier strip, screw terminals Network Management Control:.............. 9-pin D connector DAR PLUS Operator’s Guide 400468-1 Rev. C...

  • Page 21: Digital Specifications Summary

    2. Does not include branching, filter , or RF connection losses at rear of chassis. 3. For 45 Mbps at 16 QAM. 4. For one-hop, NTSC video; EIA/CCIR weighting. 5. Contact MRC for Variable Rate Modem applications. Bit rate and bandwidth dependent on application. DAR PLUS Operator’s Guide 400468-1 Rev. C...
  • Page 22 System Overview Specifications 1-10 DAR PLUS Operator’s Guide 400468-1 Rev. C...

  • Page 23: System Installation

    Section 2 System Installation This section explains how to install the DAR PLus radio. The following topics are covered: • Unpacking and Handling • Installation Prerequisites • Rack Installation Unpacking and Handling Each unit is shipped assembled, wired, and factory tested. Each unit is packaged in appropriate shipping containers.

  • Page 24: Installation Prerequisites

    Figure 2-1 Rack Clearances – Top View 18" CLEARANCE REAR STANDARD 19" RACK DAR Plus RADIO FRONT 36" CLEARANCE TW_SP DAR Plus Operator’s Guide 400468-1 Rev. C...

  • Page 25: Grounding The Equipment Rack

    The equipment rack must be connected to the station ground using a #6 copper wire or equivalent. The ground wire should be routed in as straight and direct a route as is practical. Caution: Grounding the equipment rack is mandatory. DAR Plus Operator’s Guide 400468-1 Rev. C...

  • Page 26: Rack Installation

    Rack Installation Rack Installation The DAR PLus mounts within a standard 19 inch equipment rack. The unit occupies a height 3 rack units (3RU). The DAR PLus attaches to the equipment rack using four 12–24 mounting screws. See Figure 2-2 for the correct mounting hole locations.
  • Page 27 Secure the rack to the adjacent racks and existing superstructure where applicable. Fasten the rack’s top braces to the superstructure using J-bolts. If there is not an existing superstructure, the top of the rack should be braced to a ceiling or wall. DAR Plus Operator’s Guide 400468-1 Rev. C...
  • Page 28 System Installation Equipment Rack Installation Figure 2-4 Equipment Rack – Front View MOUNTING HOLES 84.00" RACK_FR DAR Plus Operator’s Guide 400468-1 Rev. C...

  • Page 29: Initial Power-Up Procedure

    Use the following fuse type: • 120/240 Volts • 50-60 Hz • TA 250 Volts Caution: The DAR Plus radios use either double or neutral fusing depending on the model. Use care when interchanging fuses between DAR Plus radios. Use Table 2-2 to determine the correct fuse.
  • Page 30 System Installation Power Requirements and Fuse Specifications DAR Plus Operator’s Guide 400468-1 Rev. C...

  • Page 31: Operating Controls

    3 Operating Controls Overview Both the DAR Plus transmitter and receiver use a common front panel, LCD display, and keypad. The keypad is used to navigate through menus to make changes to system functions. The LCD display dynamically reports current system functions and errors messages.

  • Page 32: Transmitter Menus

    Operating Controls Transmitter Menus Transmitter Menus Figure 3-2 show the menu system for the DAR Plus Transmitter. Figure 3-2 Transmitter Menu Diagram Press Main Menu to enter the STARTUP Configuration menus. MENU (Figure 5-9 on page 5-9) Note: To reconfigure the transmitter...

  • Page 33: Transmitter Main Menu

    D-TXPWR 34 dBm Version 1.0 ALARM WINDOW Transmitter Analog Mode Alarm States Menu, Figure 3 - 6 on page 3-6 Transmitter Radio Menu, Figure 3 - 5 on page 3-5 DAR PLus Operator’s Guide 400468-1 Rev. C SW Release 1.0...

  • Page 34: Transmitter Power Supply Menu

    POWER SUPPLIES CURR. +15 +14.8 +13.9 +15.3 –15 –15.0 –14.9 –15.3 +4.98 +4.98 +5.04 D TXP +12.0 +12.0 +12.0 POWER AMP VOLTAGE “D“- Digital Mode “A“- Analog Mode DAR PLus Operator’s Guide 400468-1 Rev. C SW Release 1.0 Rev. C...

  • Page 35: Transmitter Radio Menu

    27dBm RESET OSCILLATOR MIN / MAX DIGITAL or ANALOG PHASE LOCK LOOP OUTPUT POWER DIGITAL or ANALOG CURR. - Current LCK (Normal) MIN. - Minimum MAX. - Maximum UNLCK (Alarm) DAR PLus Operator’s Guide 400468-1 Rev. C SW Release 1.0...

  • Page 36: Transmitter Analog Menu

    Figure 3-6 Transmitter Analog Mode Alarm States Menu LOST (Alarm) PHASE LOCK LOOP LOCKED UNLOCKED (Alarm) ANALOG MODE FMT PLL LOCKED SUB CARRIER CARRIER INS OK (Normal) LOST (Alarm) DAR PLus Operator’s Guide 400468-1 Rev. C SW Release 1.0 Rev. C...

  • Page 37: Transmitter Digital Menu

    T1 - ALL 1s INSERTED LOSS OF SIGNAL T1 - LOSS OF SIGNAL FAULTS FAULTS FAULTS INTERNAL MODEM STATUS MODEM STATUS MODEM SUM MODEM SUM INACTIVE INACTIVE (Normal) ACTIVE (Alarm) DAR PLus Operator’s Guide 400468-1 Rev. C SW Release 1.0...

  • Page 38: Receiver Menus

    Operating Controls Receiver Menus Receiver Menus Figure 3-8 shows the menu system for the DAR Plus Receiver. Figure 3-8 Receiver Menu System Press Main Menu to enter the STARTUP Configuration menus. MENU (Figure 5-2 on page 5-3) Choose Transmitter (TX) or...

  • Page 39: Receiver Main Menu

    For summary alarms, see Section 4, Summary Alarms on page 4-1. Receiver Radio Menu, Figure 3 - 11 on page 3-11 Receiver Analog Channel Menu, Figure 3 - 12 on page 3-12 DAR PLus Operator’s Guide 400468-1 Rev. C SW Release 1.0...

  • Page 40: Receiver Power Supply Menu

    +15 +14.8 +13.9 +15.3 –15 –15.0 –14.9 –15.3 +6.98 +4.98 +5.04 The RESET key resets the MIN. (minimum) and MAX. (Maximum) readings to the current values being displayed. 3-10 DAR PLus Operator’s Guide 400468-1 Rev. C SW Release 1.0 Rev. C...

  • Page 41: Receiver Radio Menu

    Analog (A) or Digital (D) Receive Carrier Level (RCL) and Fade Margin The RESET key resets the MIN. (minimum) and MAX. (Maximum) readings to the current value being displayed. DAR PLus Operator’s Guide 400468-1 Rev. C SW Release 1.0 3-11...

  • Page 42: Receiver Analog Channel Menu

    • IF Squelch – displays as “FORCED” or “OFF” states • PILOT - OK Figure 3-12 Receiver Analog Channel Menu Sub-Carrier State UNLOCK ANALOG MODE SUB CARRIER IF SQUELCH FORCED PILOT IF Squelch FORCED and OFF 3-12 DAR PLus Operator’s Guide 400468-1 Rev. C SW Release 1.0 Rev. C...

  • Page 43: Receiver Digital Menu

    PHASE LOCK LOOP T1 Wayside Channel LOCKED BIT ERROR RATE UNLOCKED NO ERRORS no T1 >10 EXTERNAL ALARM STATES MODEM STATUS MODEM SUM MODEM SUM INACTIVE INACTIVE (Normal) ACTIVE (Alarm) DAR PLus Operator’s Guide 400468-1 Rev. C SW Release 1.0 3-13...
  • Page 44 Operating Controls Receiver Menus 3-14 DAR PLus Operator’s Guide 400468-1 Rev. C SW Release 1.0 Rev. C...

  • Page 45: Summary Alarms

    Section 4 Summary Alarms Overview Both the DAR Plus transmitter and receiver use a control Module to gather diagnostic information from the Analog RF Shelf, the digital RF shelf, the power supply, and several plug-in modules. The Control Module is mounted to the hinged front panel and connects to the backplane using a ribbon cable.

  • Page 46: Alarm Indicators

    • The DIGITAL LED, colored amber, indicates an alarm in the digital RF section. • The ANALOG LED, colored amber, indicates an alarm in the analog RF section. Figure 4-3 DAR Plus Front Panel Display and Keypad POWER LED (GREEN) SUMMARY ALARM (YELLOW) DAR Plus Operator’s Guide...

  • Page 47: Transmitter Summary Alarms

    Speck (Source Digital Power Amp) DG TX PWR ALRM Digital Power Amplifier output None power is low. (Source Digital Power Amp) DG MODEM SUM Digital Modem Summary None Alarm (External Modem from Backplane) DAR Plus Operator’s Guide 400468-1 Rev. C...

  • Page 48: Transmitter Analog Rf Shelf Alarms

    Analog Carrier Insert Failure None Source: Limiter) AN SUBARR FLT Analog Sub-Carrier Alarm None Source: Audio Sub-Carrier Board(s)) AN FM TX LOK Analog Loss of FM Transmit None Format lock Source: 70MHz Modulator) DAR Plus Operator’s Guide 400468-1 Rev. C...

  • Page 49: Receiver Alarms

    Loss of lock detect Source: Digital Local Oscillator) DG RSL ALRM None Digital Receive Signal Level is below Fade Margin. Source: IF Amplifier) DG MODEM SUM None Digital Modem Summary Alarm. Source: External Modem from Backplane) DAR Plus Operator’s Guide 400468-1 Rev. C...

  • Page 50: Receiver Analog Rf Shelf Alarms

    When troubleshooting alarm faults, refer to the following sections in order isolate problems within the transmitter or receiver. • Section 4.5.1, DAR Plus Transmitter Alarm Reference on page 4-7 • Section Table 4-7, DAR Plus Transmitter Alarm Reference Table on page 4-7 DAR Plus Operator’s Guide 400468-1 Rev. C...

  • Page 51: Dar Plus Transmitter Alarm Reference

    DAR Plus Transmitter Alarm Reference Table 4-7 to reference alarm messages to the alarm connector as shown in Table A-4 on page A-4. Table 4-7 DAR Plus Transmitter Alarm Reference Table FIRM WARE 1.0 TRANSMITTER (TX) Pin# DISPLAY ALARM STATES DESCRIPTION...

  • Page 52: Dar Plus Receiver Alarm Reference

    DAR Plus Receiver Alarm Reference Table 4-8 to reference alarm messages to the alarm connector as shown in Table A-4 on page A-4. Table 4-8 DAR Plus Receiver Alarm Reference Table FIRM WARE 1.0 Pin# DISPLAY ALARM STATES Description DESCRIPTIONS...

  • Page 53: A System Connections

    Appendix A System Connections This appendix shows the DAR Plus external connections for the transmitter and receiver. Figure A-1 Rear Panel Connectors SUMMARY ALARM (Table A-4 on page A-4) DATA (Table A-1 on page A-2) ALARM ANALOG (Table A-3 on page...
  • Page 54 SM _C_NO SM_C_COM ––– SM_B_NC SM_A_IN SM_A_NO SM_A_COM ––– SM_C_NC SM_B_IN SM_B_NO SM_B_COM ––– SM_A_NC Note: When a QM2 Tx Modem input is grounded, It causes the associated Form C relay to activate. DAR Plus Operator’s Guide 400468-1 Rev. C...
  • Page 55 FMT = Model name for Transmitter Video Modulator For additional alarm referencing, refer to the following reference tables: • DAR Plus Transmitter Alarm Reference Table, Table 4-7 on page 4-7 • DAR Plus Receiver Alarm Reference Table, Table 4-8 on page 4-8 DAR Plus Operator’s Guide...
  • Page 56 600 ohm 8 dBm I/O Audio Channel #3 AF3A 600 ohm 8 dBm I/O – AF3B 600 ohm 8 dBm I/O Audio Channel #4 AF4A 600 ohm 8 dBm I/O – AF4B 600 ohm 8 dBm I/O DAR Plus Operator’s Guide 400468-1 Rev. C...

  • Page 57: B Modules

    This appendix shows the location of the plug-in and RF modules for both the FLH–DAR transmitter and receiver: • Section B.1, DAR Plus Transmitter Modules on page B-2 • Section B.2, DAR Plus Receiver Modules on page B-3 Also included are individual module adjustments, indicators, and test points. The following modules are included: •...

  • Page 58: Dar Plus Transmitter Modules

    Modules DAR Plus Transmitter Modules DAR Plus Transmitter Modules Figure B-1 Transmitter- Top View (Front Door Open) AUDIO BACKPLANE MODULATOR (906560) (900426) POWER AMP IF LIMITER AMP (906529) VIDEO (905720) MODULATOR MODULATOR OSCILLATOR (906859) (906556) (906570) POWER SUPPLY MICROCONTROLLER POWER AMP (906582) &...

  • Page 59: Dar Plus Receiver Modules

    DAR Plus Receiver Modules Modules DAR Plus Receiver Modules Figure B-2 Receiver - Top View (Front Door Open) AUDIO OSCILLATOR BACKPLANE DEMODULATOR LNC SPLITTER (906560) (906570) (906621) (90) IF FILTER (905560) VIDEO DEMODULATOR DEMODULATOR IF AMP (90) (906556) (906587) POWER SUPPLY...

  • Page 60: Tx Audio Modulator Motherboard (900426

    CHANNEL 3 CHANNEL 2 CHANNEL 1 (900100) (900100) (900100) (900100) 900426 CH. 1 CH. 2 CH. 3 CH. 4 CH. 1 DEV. CH. 2 DEV. CH. 3 DEV. CH. 4 DEV. FRONT PANEL VIEW DAR Plus Operator’s Guide 400468-1 Rev. C...

  • Page 61: Audio Subcarrier Generator (900100

    Fixed Capacitor for PRE-EMPHASIS R13, R14 Fixed Resistors for PRE-EMPHASIS Figure B-4 Audio Subcarrier Generator Adjustments (900100) PEAK for OUTPUT LEVEL and FREQUENCY SUBCARRIER OUTPUT LEVEL ADJUST ON/OFF SWITCH PEAKING OUTPUT LEVEL ADJUST 900100 DAR Plus Operator’s Guide 400468-1 Rev. C...

  • Page 62: Rx Video Demodulator (906556

    Note: All other adjustment components are factory set and should not be adjusted. Figure 1-5 Rx Video Demodulator Adjustments (906556) 906556 SQUELCH LED (RED = SQUELCHED) SQUELCH THRESHOLD ADJUSTMENT BASEBAND GAIN ADJUSTMENT VIDEO GAIN ADJUSTMENT SUB-CARRIER ADJUSTMENT FRONT PANEL VIEW DAR Plus Operator’s Guide 400468-1 Rev. C...

  • Page 63: Rx Audio Motherboard (900414

    (900172) 900414 CH. 1 CH. 2 CH. 3 CH. 4 CH. 1 AUDIO LEVEL ADJUST CH. 2 AUDIO LEVEL ADJUS. CH. 3 AUDIO LEVEL ADJUST CH. 4 AUDIO LEVEL ADJUST FRONT PANEL VIEW DAR Plus Operator’s Guide 400468-1 Rev. C...

  • Page 64: Rx Audio Subcarrier Demodulator (900172

    Rx Audio Subcarrier Demodulator (900172) NOTCH FILTER FREQUENCY ADJUST NOTCH FILTER Q FACTOR ADJUST FLATNESS ADJUST AT 15 KHz. DISCRIMINATOR ADJUST FOR DISTORTION PEAK FOR S.C. LEVEL AT U1 PIN 13 @ 2.5Vdc. 900172 DAR Plus Operator’s Guide 400468-1 Rev. C...
  • Page 65 Jumper Configurations Digital Video E6–E4 E6–E5 E3–E1 E3–E2 E9 – E10 E9 – E10 E13 – E14 E13 – E14 Figure B-8 Rx IF Filter/Equalizer INPUT OUTPUT +15V DIGITAL E11 E8 VIDEO 905550A DAR Plus Operator’s Guide 400468-1 Rev. C...
  • Page 66 Note: Switch S1 is factory set in the AGC position. Figure B-9 IF Amp (905764) MANUAL AGC IF IN R104 GAIN VIDEO VREF VDET DIGITAL IF MON R109 OFFSET ZERO db SQLV 905884A B-10 DAR Plus Operator’s Guide 400468-1 Rev. C...
  • Page 67 E9 – E11 E9 – E10 E3 – E18 E7 – E8 – E4 – E18 Figure B-10 IF Limiter/Amp E22 E21 ALARM +15V 905710A Note: Jumpers are set in Analog/Digital position. DAR Plus Operator’s Guide 400468-1 Rev. C B-11...
  • Page 68 Modules IF Limiter/Amp (905720) B-12 DAR Plus Operator’s Guide 400468-1 Rev. C...
  • Page 69 Appendix C Frequency Settings This appendix shows the DAR PLus synthesizer settings for the 6, 12, and 13 GHz bands. Refer to the following tables for the correct frequency band: • Table C-1, 6 GHz Oscillator Switch Settings ,on page C-2 •...
  • Page 70 13225 12875 13237.5 12887.5 13250 12900 13262.5 12912.5 13275 12925 13287.5 12937.5 13300 12950 13312.5 12962.5 13325 12975 13337.5 12987.5 13350 13000 13362.5 13012.5 13375 13025 13387.5 13037.5 13400 13050 13412.5 13062.5 13425 DAR Plus Operator’s Guide 400468-1 Rev. C...

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