Charles 7305-14 4W-2W Скачать руководство пользователя страница 8 | Manualshive

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Section 730–514–202

8

Figure 8. 7305–19 4W–4W/2W SF To E&M W/LBK (Issue 2) Block Diagram

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Содержание 7305-14 4W-2W

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

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

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

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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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