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Section 730–514–202

Equipment Issue 2

Second Printing, December 1999

Telecommunications Group

1999 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.

Page 1 of 22

7305–14 4W–4W/2W Prescription Line Amplifier SF to E&M

Module and 7305–19 4W–4W/2W Prescription Line

Amplifier SF to E& M W/Loopback Module

CONTENTS

PAGE

Part 1.

GENERAL

2

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Part 2.

INSPECTION

3

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Part 3.

APPLICATION GUIDELINES

3

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Part 4.

CIRCUIT DESCRIPTION

3

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Part 5.

MOUNTING

10

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Part 6.

INSTALLER CONNECTIONS

10

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Part 7.

OPTIONS

11

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Part 8.

ALIGNMENT

15

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Part 9.

TESTING

17

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Part 10.

TECHNICAL ASSISTANCE

18

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Part 11.

WARRANTY & CUSTOMER SERVICE

18

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Part 12.

SPECIFICATIONS

20

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Figure 1.   7305–19 4W–4W/2W SF To E&M W/LBK Module

Summary of Contents for 7305-14 4W-2W

Page 1: ...notice Page 1 of 22 7305 14 4W 4W 2W Prescription Line Amplifier SF to E M Module and 7305 19 4W 4W 2W Prescription Line Amplifier SF to E M W Loopback Module CONTENTS PAGE Part 1 GENERAL 2 Part 2 IN...

Page 2: ...ng features 1 5 1 Transmission Switch selectable 4W to 4W or 4W to 2W operation Switch selectable line side terminating impedance of 150 600 or 1200 ohms 4W station side terminating impedance of 600 o...

Page 3: ...e or station applications and provides all necessary circuit functions to interface a 4 wire SF facility to a PBX trunk circuit See Figure 2 Figure 3 and Figure 4 Figure 5 and Figure 6 illustrate typi...

Page 4: ...e voice path contains a gain stage RCV GN providing up to 24dB of gain in 0 1dB steps The RCV GN compensates for cable loss and is used to set the internal 7TLP for the SF RECEIVER Figure 2 7305 14 19...

Page 5: ...Section 730 514 202 5 Figure 5 Typical 4W 4W Application For 7305 14 19...

Page 6: ...Section 730 514 202 6 Figure 6 Typical 2W 4W Application For 7305 14 19...

Page 7: ...Section 730 514 202 7 Figure 7 7305 14 4W 4W 2W SF To E M Issue 2 Block Diagram...

Page 8: ...Section 730 514 202 8 Figure 8 7305 19 4W 4W 2W SF To E M W LBK Issue 2 Block Diagram...

Page 9: ...frequencies other than 2600Hz to aid in maintaining the idle condi tion The guard circuit is enabled 50 milliseconds nominally after the loss of SF tone which places the SF re ceiver in the narrow ba...

Page 10: ...tector can be disabled by placing the DTD switch of S103 to the IN position Manual loopback can be enabled by placing the MLB switch of S103 to the IN position The LOOPBACK LEVEL AND CONTROL also cont...

Page 11: ...able 2 4W Line Impedance Selection 4W Cable Impedance Selection Ohms S1 S2 position Nonloaded 150 600 H88 Loaded 1200 Mix loaded and non loaded 1 50 600 if distance between the 7305 14 19 and the firs...

Page 12: ...Trunk TRK Type II 4W TL12E 2W For type III operation place switch S5 in the TYPE I III position 7 6 Switches On S8 Receive Equalization Adjustment RCV EQLR The RCV EQLR switches on S8 are used to prov...

Page 13: ...on See Table 3 S7 2W port build out network BON To balance 100 to 250 feet of 26 gauge cable To balance less than 100 feet of cable IN OUT S8 Cable equalization loaded and or nonloaded Provides up to...

Page 14: ...rom the 4W 2W XMT STA TLP 2 Program the required level by setting the switches on S102 equal to the gain calculated in Step a 0 05dB Place switch S101 in the GAIN position if the result is positive pl...

Page 15: ...0 2 4 X X X X 11 0 5 6 X X X 5 1 2 9 X X X X X 11 1 6 0 X X X 5 2 3 4 X X X X X 11 2 6 6 X X X X 5 3 4 2 X X X X X X 11 3 7 3 Referenced to 1000 Hz level 1000 Hz gain is 0dB for all equalization setti...

Page 16: ...ceiver TLP Set the RCV ATN switches to off located on the front panel 6 Program the required RCV gain by setting the RCV GN switches located on the front panel equal to the gain calculated in Step 5 0...

Page 17: ...XMT line jack of the CFM and request the distant terminal to measure the 1000 Hz test tone 9 Distant terminal verifies proper level as specified on the CLR 10 This complete the transmit path alignment...

Page 18: ...erify the proper transmit line level as read on the AC voltmeter 6 Disconnect oscillator from the XMT STA jack and remove busy from the E or M lead 7 Verify that the AC voltmeter reads 8dBm0 for appro...

Page 19: ...Standard Repair and Replacement Service Both In Warranty and Out Of Warranty Units Charles Industries Ltd offers a standard repair or exchange service for units either in or out of warranty With this...

Page 20: ...e front panel g TRANSMIT AND RECEIVE STATION SIDE ATTENUATION 0 to 24dB in 0 1dB increments adjust able from the front panel h RECEIVE SLOPE EQUALIZATION Gain differential between 1000 and 2800Hz is 1...

Page 21: ...level 8dBm0 1dB k HIGH LEVEL TONE TIMING High level tone is transmitted for 400 100msec following each busy to idle transition l TRANSMIT CUT INSERTION 10 7msec before transmission of SF tone from bus...

Page 22: ...hysical characteristics of the units Table 7 Physical Specifications Feature U S Metric Height 5 6 inches 14 2 centimeters Width 1 4 inches 3 5 centimeters Depth 6 0 inches 15 2 centimeters Weight nom...

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