Dantel 44124 Скачать руководство пользователя страница 5

44124-0798 <90-00024>

 P

AGE

 5

Set signal amplitude (height or HT) with switches S7-1 to
S7-4. Each switch has an assigned value that determines the
total signal amplitude.

Set equalizer height (HT) with switches S7-5 to S7-8. Each
switch has an assigned value that determines the total band-
width.

You can bypass the input equalizer by setting switch S9 to BYP.

Input Amplifier

The input amplifier supplies up to 24 dB of gain or loss in
0.1 dB increments.

Set the amplification level with switches S11-1 to S11-8.

Set the amplification as a gain or loss with switch S13.

Loopback and Control Circuit

The loopback and control circuit breaks the drop side receive
and transmit paths, then connects the output of the receive path
to the input of the transmit path. The loopback and control
circuit is enabled in two ways. These are listed on the next page.

The tone detector receives a 2713 Hz signal for at least
1.8 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 to ON, or connect pin 1 to pin 19 (ground).

Set loopback amplifier gain to 0, 8, or 16 dB with switches
S12-4 and S12-5.

When the loopback and control circuit activates, the TEK 5 and
6 connection leads open and relay K2 removes the sealing
current.

The loopback and control circuit is disabled in two ways:

Set switch S12-2 to ON.

The circuit times out after 4 or 20 minutes. Set switch
S12-1 to ON for a 4 minute timeout, and OFF for a
20 minute timeout.

At the end of the timeout cycle, relay K1 is released and the
loopback and control circuit is disabled. Receive and transmit
paths reset to normal. A second 2713 Hz tone also resets the
paths.

Output Amplifier

The output amplifier supplies up to 24 dB of gain or loss in
0.1 dB increments. Set the amplification level with switches S1
and S3. The amplified output signal couples to connector pins 41
and 47 and the XMT OUT jack contacts.

CIRCUIT DESCRIPTION

Содержание 44124

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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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