Dantel 44124 Installation & Operation Manual Download Page 3

44124-0798 <90-00024>

 P

AGE

 3

F

IG

. 1 - E

XAMPLE

 A

PPLICATION

, 44124

APPLICATION INFORMATION

CIRCUIT DESCRIPTION

A

 functional schematic for the 44124 Data Channel Termina-

tion Module is shown in Fig. 2. Here is a brief description of

each of the functional parts of the circuit:

Impedance Matching Transformers

Two of the impedance matching transformers (T1 and T3)
provide a switch selectable impedance of 150, 600, or 1200 ohms
(set with switch 6). The module line conditioning circuit couples
the line side receive and trasmit signals.

The drop side transformers provide a switch selectable applica-
tion of two-wire or four-wire lines (select with switch S10). Drop
side transformer impedance is fixed at 600 ohms.

Input Equalizer Circuit

The input equalizer circuit receives an incoming signal from the
impedance matching transformer (T1). The circuit adjusts slope,
bandwidth, and amplitude before the signal reaches the input
amplifier.

Set slope equalization with switches S8-1 to S8-5

Switch S8-1 sets the equalizer slope cable to loaded or
nonloaded.

Switches S8-2 to S8-5 have assigned values that determines
the total slope figure.

46020-XX

MAP

46023-1X

SMART MAC

46033-XX

ESA

44124-XX

DST

46020-XX

MAP

46023-1X

SMART MAC

460 ALARM AND CONTROL SYSTEM

DATA / TTL

1

8

RS-232

SUBASSEMBLY

EIGHT

RS-422

SERIAL PORT

DCP

TABS

MASTER
PORT

PRINTER
PORT

202 MODEM

SUBASSEMBLY

XMT OUT

RCV IN

DATA / TTL

1

8

RS-232

SUBASSEMBLY

EIGHT

RS-422

SERIAL PORT

DCP

TABS

MASTER
PORT

PRINTER
PORT

LOOPBACK

DETECT

LOOPBACK

DETECT

600  

600  

XMT IN

600  

RCV OUT

600  

RS-232

PORT

TO

FMAC

NMA

TASC

ETC...

LINE

SIDE

Summary of Contents for 44124

Page 1: ...For more complete information on electrostatic discharge safety precautions refer to BellcoreTM Technical Reference TR NWT 000870 Copyright 1998 by Dantel Inc Dantel is a registered trademark of Dant...

Page 2: ...equal ization control are required The 44124 DCTM provides Data channel line conditioning that includes Impedance matching Selectable gain and attenuation control Adjustable 309B type post equalizati...

Page 3: ...xed at 600 ohms Input Equalizer Circuit The input equalizer circuit receives an incoming signal from the impedance matching transformer T1 The circuit adjusts slope bandwidth and amplitude before the...

Page 4: ...OR CONTROL ACCUMULATIVE SETTINGS INPUT AMPLIFIER CIRCUIT ACCUMULATIVE SETTINGS OUTPUT AMPLIFIER ACCUMULATIVE SETTINGS K1 LOOPBACK RELAYS S8 SLOPE S7 BANDWIDTH S7 AMPLIFIER HT S12 LOOPBACK LEVEL S11 dB...

Page 5: ...8 seconds Tone detection provides remote testing of the facility and its active components A guard circuit prevents signal frequencies near 2713 Hz from enabling the loopback feature Set switch S12 3...

Page 6: ...ates improper switching or reversed simplex lead polarity Set simplex lead polarity with switch S5 Regulated Power Supply The regulated power supply furnishes all 44124 DCTM power requirements It supp...

Page 7: ...T e r i W r u o F 0 1 S 0 1 S W 2 W 4 k c a b p o o L z H 3 1 7 2 e l b a n E e l b a s i D 2 2 1 S 2 2 1 S D T D t u o e m i T k c a b p o o L z H 3 1 7 2 s e t u n i M 4 s e t u n i M 0 2 1 2 1 S 1...

Page 8: ...a u q E t c e l e S d e d a o L d e d a o l n o N 1 8 S 1 8 S L N n i a G l e v e L t u p n I t c e l e S s s o L n i a G s s o L 3 1 S 3 1 S G L l e v e L t u p n I e v i t a l u m u c c a B d f f o...

Page 9: ...9 8 7 6 5 4 3 2 1 CIRCUIT SIDE OF PC BOARD COMPONENT SIDE OF PC BOARD RCV Input Drop Side TIP A T2 Simplex RCV Input Drop Side RING XMT Output Line Side TIP SX1 XMT Output Line Side RING 21 to 56 VDC...

Page 10: ...the cable If the LF slope is equal to or greater than 3 0 dB set S8 1 ON nonloaded cable Set LF slope SL settings of switches S8 2 to S8 5 using the Nonloaded Cable column of Table B If the LF slope...

Page 11: ...using INSTALLATION TABLE B LF SLOPE SL SETTINGS FOR LOADED AND NONLOADED CABLES NOTE If the calculated values of Slope SL fall between settings use the lower setting indicated by the table LOSS AT 100...

Page 12: ...1 75 2 45 3 15 3 85 4 55 5 25 5 95 6 65 7 35 8 05 8 75 9 45 10 15 Reference Total OFF 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 S7 1 1 OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON S7 2 2 OFF OFF...

Page 13: ...ed by the table Reference Total 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 S7 5 1 OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON S7 6 2 OFF OFF ON ON OFF OFF ON ON OFF OFF ON ON OFF OFF ON ON S7 7...

Page 14: ...52 1 67 1 82 1 98 2 13 2 28 7 0 23 0 46 0 69 0 92 1 15 1 38 1 61 1 84 2 07 2 30 2 53 2 76 2 99 3 22 3 45 8 0 27 0 55 0 82 1 09 1 37 1 64 1 91 2 19 2 46 2 73 3 01 3 28 3 55 3 83 4 10 9 0 30 0 60 0 90 1...

Page 15: ...i l a e s r H u t B 8 4 r H u t B 3 2 1 e v i t c A k c a b p o o L g n i e b t n e r r u c g n i l a e s o n d e t a r e n e g r H u t B 4 5 r H u t B 0 4 1 n i a G B d 4 2 n o i t a z i l a u q E 6...

Page 16: ...n instrument signed by a duly authorized officer of the Seller and accepted by the Buyer Warranty and remedies on products not manufactured by the Seller are in accordance with warranty of the respect...

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