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AGE

44118-0798 <90-00003>

STEP

ACTION

A) Remove power from the module

receptacle.

B) Plug in 44118 module.

C) Apply power
Calibrate module #1 first. (It doesnt

matter which one is called #1.) Connect a

600 ohm terminated dB meter across the
600 ohm output from the signal

generator. Set generator frequency

to 1 KHz.
Connect the 600 ohm terminated dB level

meter to the COMBINED DIST

OUTPUT jack (J9) on the 44118 front
panel.

Connect the signal generator to the LINE

RCV PORT 1 jack (J1) on the 44118 front
panel.

Move signal generator to the LINE RCV

PORT 2 jack (J3). Reset for port 2
receive level, if necessary.

Move signal generator to the LINE RCV

PORT 3 jack (J5). Reset for port 3
receive level, if necessary.

Move signal generator to the LINE RCV

PORT 4 jack (J7). Reset for port 2
receive level, if necessary.

Leave the signal generator connected to

J7 for steps 9 through 11. Do not change
generator level. Do not readjust any

receive level controls.

RESULTS

Adjust generator level for reading equal to system

line receive test tone level (0 dBmO) for port 1. This

level will be between -16 and +7 dBm, according to
your companys requirements.

Leave the dB meter connected to J9 for steps 4

through 7.

Read distribution level on meter. Adjust the LINE

RCV PORT 1 level control (R7) for reading of
-10 dBm, or appropriate distribution level for the

system, if different. If desired level cannot be

reached, move the 1R gain strap to the HI or LO
position, as required.

Read distribution level on meter. Adjust the LINE

RCV PORT 2 level control (R24) for reading of
-10 dBm, or appropriate distribution level for the

system, if different. If desired level cannot be

reached, move the 2R gain strap to the HI or LO
position, as required.

Read distribution level on meter. Adjust the LINE

RCV PORT 3 level control (R38) for reading of
-10 dBm, or appropriate distribution level for the

system, if different. If desired level cannot be

reached, move the 3R gain strap to the HI or LO
position, as required.

Read distribution level on meter. Adjust the LINE

RCV PORT 4 level control (R54) for reading of
-10 dBm, or appropriate distribution level for the

system, if different. If desired level cannot be

reached, move the 4R gain strap to the HI or LO
position, as required.

CONTINUED

. . .

INSTALLATION

ABLE

D - E

IGHT

-W

/ F

OUR

-W

IRE

RIDGE

PPLICATION

ALIBRATION

ROCEDURE

Содержание 44118

Страница 1: ... or radioactive fields 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 Dantel Inc ISO 9001 Registered Printed in the U S A INSTALLATION OPERATION MANUAL 44118 0798 90 00003 44118 ACTIVE DISTRIBUTION BRIDGE About this Practice This practice has been reis...

Страница 2: ...ing and distribution amplifier The front panel includes test jacks and level controls for each port allowing complete alignment of the bridge A combined distribution output port provides alignment and operation of a common DTMF decoder or monitor speaker The 44118 ADB operates on 21 to 56 VDC input power CIRCUIT DESCRIPTION Fig 1 shows the functional schematic for the 44118 Active Distribution Bri...

Страница 3: ...e direct bus low impedance output and three resistively isolated 100K ohm outputs The outputs distribute signals to external summing points that is eight way bridges and general signal distribution A strapping network can disconnect the transmit distribution network if you use four way bridges Line Transmit Circuits Each of the four line transmit circuits contains An amplifier An output transforme...

Страница 4: ... 16 14 12 RECEIVE DISTRIBUTION NETWORK 2 100K 20 TRANSMIT DISTRIBUTION 2C 2B 2A 2 2C 2B 2A 2 2D RECEIVE DISTRIBUTION LINE RECEIVE INPUT 3 7 48 7K 3 RCV GAIN HI LO 10V T5 J5 9 600 LINE RECEIVE CIRCUIT 3 15 3 XMT GAIN LO HI T6 J6 25 600 LINE TRANSMIT CIRCUIT 3 LINE TRANSMIT OUTPUT 3 100K 100K 100K D3X D3H 100K 100K 100K 23 21 19 39 TRANSMIT DISTRIBUTION NETWORK 3 H3R D3R 100K 100K 100K 28 26 24 22 R...

Страница 5: ... input This forms an on board four way bridge You can strap each input circuit to the summing bus in general signal distribution applications Inputs not strapped to the summing bus has its respective summing line strapped to ground This prevents noise and cross talk from injection at the line transmit circuits You can also use the summing bus in eight way bridge applications Combined Distribution ...

Страница 6: ...cations 1 Wire the connector Normally the shelf is pre wired for the module If you wire the connector refer to Fig 2 for the edge connector pin designations 2 Install the Proper Strap Options Determine the desired strapping application Four Way Four Wire Bridge Eight Way Four Wire Bridge Summing and Distribution Amplifier The following sections describe each application NOTE If the 44118 is shippe...

Страница 7: ...A 2A 4 2 R 1C T 1B R 1A T 1 XMT DIST Output 3 4D Combined Distribution Output R 4C 21 to 56 VDC input 4B Port 1 OUT R 4A Port 4 OUT R 4 Port 2 OUT R 3D Port 1 OUT T 3C Port 3 OUT R 3B 3C 3A 3B 3 3A 2D Ground REF 2C Port 3 OUT T 2B Port 4 OUT T 2A Port 2 OUT T 2 R 1D T 1C R 1B T 1A Combined Distribution Output T 1 XMT DIST 4 Outputs Port 1 IN Port 2 IN XMT DIST 3 Outputs Port 3 IN Port 4 IN XMT DIS...

Страница 8: ...ion is typical for all four ports You can connect a 44020 DTMF decoder to the com bined distribution output pins 1 and 37 The 44020 DTMF decodes DTMF dialing tones from any of the four input legs You can use this output for connecting monitoring equipment because all signals coming into the bridge appear at this output Refer to Fig 4 and Table A for proper strap option installation INSTALLATION FI...

Страница 9: ...smit Port 2 0 to 7 dB 0 to 16 dB Transmit Port 3 0 to 7 dB 0 to 16 dB Transmit Port 4 0 to 7 dB 0 to 16 dB FOUR WAY BRIDGE Summing Bus IN Transmit Distribution Networks OUT Receive Distribution Networks OUT STRAP IN 1R HI 1R LO 2R HI 2R LO 3R HI 3R LO 4R HI 4R LO 1X HI 1X LO 2X HI 2X LO 3X HI 3X LO 4X HI 4X LO B1X B2X B3X B4X D1H D2H D3H D4H H1R H2R H3R H4R INSTALLATION TABLE A FOUR WAY FOUR WIRE ...

Страница 10: ...or appropriate distribution level for the system if different If desired level cannot be reached move the 1R gain strap to the HI or LO position as required Read distribution level on meter Adjust the LINE RCV PORT 2 level control R24 for reading of 10 dBm or appropriate distribution level for the system if different If desired level cannot be reached move the 2R gain strap to the HI or LO positio...

Страница 11: ...r LO position as required Read distribution level on meter Adjust the LINE RCV PORT 4 level control R54 for reading of 10 dBm or appropriate distribution level for the system if different If desired level cannot be reached move the 4R gain strap to the HI or LO position as required Read system line transmit test tone level 0 dBmO for port 1 Adjust the LINE XMT PORT 1 level control R16 for proper r...

Страница 12: ...mbined distribution outputs One system listens to traffic on legs 1 to 4 and the other system listens to traffic on legs 5 to 8 If you use only one decoder or monitor you can combine the two distribu tion outputs by using a hybrid transformer or a resistive com biner A combined distribution output load mismatch does not affect the rest of the bridge Refer to Fig 3 and Table C for proper strap opti...

Страница 13: ...nsmit Port 2 0 to 7 dB 0 to 16 dB Transmit Port 3 0 to 7 dB 0 to 16 dB Transmit Port 4 0 to 7 dB 0 to 16 dB FOUR WAY BRIDGE Summing Bus IN Transmit Distribution Networks IN Receive Distribution Networks IN STRAP IN 1R HI 1R LO 2R HI 2R LO 3R HI 3R LO 4R HI 4R LO 1X HI 1X LO 2X HI 2X LO 3X HI 3X LO 4X HI 4X LO B1X B2X B3X B4X D1X D2X D3X D4X D1R D2R D3R D4R INSTALLATION TABLE C EIGHT WAY FOUR WIRE ...

Страница 14: ...is level will be between 16 and 7 dBm according to your company s requirements Leave the dB meter connected to J9 for steps 4 through 7 Read distribution level on meter Adjust the LINE RCV PORT 1 level control R7 for reading of 10 dBm or appropriate distribution level for the system if different If desired level cannot be reached move the 1R gain strap to the HI or LO position as required Read dis...

Страница 15: ...O for port 1 Adjust the LINE XMT PORT 1 level control R16 for proper reading If the desired reading cannot be reached move the 1X gain strap to the HI or LO position as required Read system line transmit test tone level 0 dBmO for port 2 Adjust the LINE XMT PORT 2 level control R31 for proper reading If the desired reading cannot be reached move the 2X gain strap to the HI or LO position as requir...

Страница 16: ...LICATION Fig 6 shows a summing and distribution amplifier application A signal received on the summing common port goes out the other three ports but the signal does not transmit through the summing port A signal received at any of the distribution ports transmits through the summing port but does not transmit through the distribution ports Fig 7 shows a summing and distribution application using ...

Страница 17: ...51 3 5 12 4 34 13 31 12 3 24 15 25 11 2 14 11 29 10 1 4 27 33 9 TO ADDITIONAL 44118s FROM ADDITIONAL 44118s Install these jumpers in the unit with the summing port D1R H2R H3R H4R D1X D2X D3X D4X B1X G2X G3X G4X Install these jumpers in all other units D1R D2R D3R D4R D1X D2X D3X D4X G1X G2X G3X G4X DISTRIBUTION PORT SUMMING PORT DISTRIBUTION PORT DISTRIBUTION PORT INSTALLATION FIG 6 SUMMING AND D...

Страница 18: ...dB Transmit Port 3 0 to 7 dB 0 to 16 dB Transmit Port 4 0 to 7 dB 0 to 16 dB STRAP IN 1R HI 1R LO 2R HI 2R LO 3R HI 3R LO 4R HI 4R LO 1X HI 1X LO 2X HI 2X LO 3X HI 3X LO 4X HI 4X LO NOTE Check the drawings for your application to determine which of the four ports is the summing port then strap the module accordingly PORT 1 SUMMING Ports 2 3 4 Distribution D1R D1H B1X H2R D2X G2X H3R D3X G3X H4R D4...

Страница 19: ...evel will be between 16 and 7 dBm according to yourcompany srequirements Leave the dB meter connected to J9 for steps 4 through 7 Read distribution level on meter Adjust the LINE RCV PORT 1 level control R7 for reading of 10 dBm or appropriate distribution level for the system if different If desired level cannot be reached move the 1R gain strap to the HI or LO position asrequired Read distributi...

Страница 20: ...ator level for each port as necessary Move the generator to the LINE RCV summing port on the module with the summing port Reset the generator level if necessary Connect the dB meter to the four LINE XMT ports one at a time in the module being calibrated Repeat steps 11 14 for additional 44118 modules Calibration complete Remove the generator and dB meter RESULTS At the LINE XMT summing port read t...

Страница 21: ...t Distribution Outputs Summing Inputs Input Voltage Range Input Power Requirement Heat Dissipation Physical Dimensions Weight Operating Temperature Range VALUE 300 Hz to 4 KHz 0 5 dB Greater than 20 dB Greater than 60 dB 1 KHz 600 ohm transformer coupled 600 ohm transformer coupled 600 ohm transformer coupled Less than 2 ohms 100K ohm High impedance requires 100K ohm source 100K ohm high impedance...

Страница 22: ...en 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 respective manufacturer THE SELLER MAKES NO OTHER WARRANTY OF ANY KIND WHATSOEVER EXPRESSED OR IMPLIED AND ALL IMPLIED WARRANTY OF FITNESS FOR A PARTICULAR PUR POSE WHICH EXCEEDS THE AFORESAID OBLIGATIONS I...

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