Dantel 44124 Installation & Operation Manual Download Page 4

P

AGE

 4

44124-0798 <90-00024>

F

IG

. 2 - F

UNCTIONAL

 S

CHEMATIC

, 44124

 13

 7

 41

 47

9

43

1dB

2dB

4dB

8dB

1dB

2dB

4dB

8dB

1dB

2dB

4dB

8dB

1dB

2dB

4dB

8dB

 49

 55

15

 5

MON

IN

IMPED

ANCE

MA

TCHING

TRANSFORMER

2713 Hz LOOPBA

CK

DETECT

OR & CONTR

OL

CIRCUIT

SEALING

CURRENT

SUPPL

Y

S6

AMBER

LED

SC

SXT

SC

S4

K2

LGL

G

S2

K2

-48 VDC

S5

SXR

V

NOR

SIDE B

LINE SIDE

C

SXT

SC

S4

SX

SX1

RCV

INPUT

R

T

35

17

-21 TO - 56 VDC

-BA

TT

GR

OUND

REGULA

TED

PO

WER

SUPPL

Y

T1

150

1200

600

PWR

GREEN LED

INPUT EQ

U

ALIZER CIRCUIT

(A

CCUMULA

TIVE SETTINGS)

2713 Hz LOOPBA

CK

DETECT

OR & CONTR

OL

(A

CCUMULA

TIVE SETTINGS)

INPUT AMPLIFIER CIRCUIT

(A

CCUMULA

TIVE SETTINGS)

OUTPUT AMPLIFIER

(A

CCUMULA

TIVE SETTINGS)

K1

LOOPBA

CK

RELA

YS

S8 SLOPE

S7 BAND

WIDTH

S7 AMPLIFIER (HT)

S12 LOOPBA

CK LEVEL

S1

1 dB GAIN LOSS

S13

GAIN LOSS

NL

K1

T2

S1

2W

4W

.1dB

.2dB

.4dB

.8dB

1.5dB

3

d

B

6

d

B

12dB

S1 LEVEL SETTINGS

S3

GAIN LOSS

IMPED

ANCE

MA

TCHING

TRANSFORMER

T2

K1

S12-3

-20 VDC

RED LED

20

LB

MLB

GR

OUND

MLB (MANUAL LOOPBACK)

TEK 6

LOOPBA

CK

19

1

23

TEK 5

21

RI/DRI

RCV

OUTPUT

TI/DTI

R/DR

XMT

INPUT

T/DT

3

51

B/T2 SIMPLEX

A/T2 SIMPLEX

EQR

BYP

S9

SIDE A

DROP SIDE

MON

OUT

XMT

OUTPUT

T1

R1

T3

150

1200

600

A to B

A to B

B to A

B to A

SXR

V

NOR

NOR

S5

K1

NL

.1dB

.2dB

.4dB

.8dB

1.5dB

3

d

B

6

d

B

12dB

B to A

OUT

A to B

IN/2W

NOR

CIRCUIT DESCRIPTION

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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