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Charles 3653–36 Manual

4w transmission only with extended range and loopback (4w to/er/lb) channel unit
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3653-36 4W Transmission Only with Extended Range and
Loopback (4W TO/ER/LB) Channel Unit
CONTENTS
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2001 Charles Industries Ltd.
CLEI is a trademark of Bell Communications Research, Inc.
All rights reserved. Printed in United States of America.
The availability of features and technical specifications herein subject to change without notice.
Telecommunications Group
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Figure 1. 3653-36 Front Panel
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4W
TO/ER/LB
ISS 2
Section 365-336-202
Equipment Issue 2
Second Printing, January 2001
Page 1 of 12
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Summary of Contents for Charles 3653–36

  • Page 1: Table Of Contents

    ..............TO/ER/LB ISS 2 Figure 1. 3653–36 Front Panel 2001 Charles Industries Ltd. CLEI is a trademark of Bell Communications Research, Inc. All rights reserved. Printed in United States of America. Page 1 of 12...

  • Page 2: Part 1. General

    Equipment Identification Charles Industries’ equipment is identified by a model and issue number imprinted on the front panel or located elsewhere on the equipment. Each time a major engineering design change is made on the equipment, the issue number is advanced by 1 and imprinted on subsequent units manufactured.

  • Page 3: Part 3. Application Guidelines

    pative mat, when handling modules outside of their protective packaging. A module intended for future use should be tested as soon as possible and returned to its original protective packaging for storage. STATIC-SENSITIVE Use approved static preventive measures (such as a static-conductive wrist strap and a static-dissipative mat) at all times whenever touching units outside of their original, shipped static-protective packaging.
  • Page 4 Section 365–336–202 The adjusted VF signal is then routed through transformer T2 which provides dc isolation from the line and a bal- anced output level. The signal is then fed to the T1 & R1 leads (pins 8 and 7) via the LINE and DROP jacks. Sealing Current Three different configurations of Sealing Current are provided and are selected by option Switch S1.

  • Page 5: Part 5. Mounting

    2713Hz Tone-Activated Loopback The 3653–36 provides tone-operated loopback toward the digital facility. A continuous 2713Hz loopback control signal applied from the far end for a minimum of 2.2 seconds and then removed will result in the operation and latching of the LB RELAY and the illumination of the front-panel LB LED. While operated, the LB RELAY will per- form the following functions: Opens the 4W port to the 4W equipment preventing transmission.

  • Page 6: Part 6. Installer Connections

    Section 365–336–202 INSTALLER CONNECTIONS Installer connections are made to the channel unit via connectorized cable connectors that are part of the chan- nel bank assembly. Refer to the appropriate channel bank installer practice for pin assignments. OPTIONS The 3653–36 is equipped with push button, DIP, and slide switch options that are used to condition the module for proper application and operation.
  • Page 7 Figure 4. 3653–36 Option Locations Table 1. Description of Figure 4 Option Position Use to SX (Simplex) Sealing current is generated by the channel unit with automatic ZAP when the module is first plugged in. OPN (Open) No sealing current. LP(Loop) Loop sealing current supplied from the other end of the analog facility by the channel unit via the simplex leads of transformers...

  • Page 8: Part 8. Alignment

    Section 365–336–202 Option Position Use to S9 (MLB) With each operation of switch S9, To manually activate Loopback (MLB). front-pan- the channel unit alternates be- el push- el ush tween manual loopback and nor- tween manual loo back and nor button mal operating mode.
  • Page 9 Step Action Determine the required ELL by adding the setting for the XMT ATTN and RCV ATTN settings and sub- tracting 32.5. ELL = XMT ATTN + RCV ATTN – 32.5 Set switch S6 to the required ELL to the nearest 0.5dB. If the ELL is a negative number, set switch S7 to ATTN position;...

  • Page 10: Part 9. Testing

    Charles Industries, Ltd. offers a standard repair or exchange service for units either in- or out-of-warranty. With this service, units may be shipped to Charles Industries for either repair and quality testing or exchanged for a replacement unit, as determined by Charles Industries. Follow the Repair Service Procedure below to return units and to secure a repair or replacement.

  • Page 11: Part 12. Specifications

    – Company name and address – Contact name and phone number – Inventory of equipment being shipped – Particulars as to the nature of the failure – Return shipping address 3. Ship the equipment, purchase order, and above-listed information, transportation prepaid, to the ser- vice center address shown below.
  • Page 12 Section 365–336–202 Table 4. Frequency Response FREQ (Hz) XMT (dB) RCV (dB) Less than –14.0 –––––––– +0.15 to –2.0 +0.15 to –1.0 +0.15 to –0.15 +0.15 to –0.15 1000 0 (REF) 0 (REF) 3000 +0.15 to –0.15 +0.15 to –0.15 3400 0 to –1.5 0 to –1.5...

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