TX RX Systems 28-13-01F Скачать руководство пользователя страница 2

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TUNING

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INSTALLATION

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ASSEMBLY

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TX RX SYSTEMS INC. 8625 INDUSTRIAL PARKWAY, ANGOLA, NY 14006

TELEPHONE 716-549-4700 716-549-4772 (24 HRS.)

A MEMBER OF BIRD TECHNOLOGIES GROUP

SYSTEMS

INC.

Instruction Manual

Vari-Notch Duplexers (6" Cavities)

Version Number

Version Date

09/19/97

First Printing : September 1997

Part No.

7-9177-1

84YCB

Содержание 28-13-01F

Страница 1: ...ndustrial Parkway Angola NY 14006 9696 716 549 4700 24 hr Fax 716 549 4772 A Member of Bird Technologies Group SYSTEMS INC Instruction Manual Vari Notch Duplexers 6 Cavities Copyright 1997 TX RX Syste...

Страница 2: ...NY 14006 TELEPHONE 716 549 4700 716 549 4772 24 HRS A MEMBER OF BIRD TECHNOLOGIES GROUP SYSTEMS INC Instruction Manual Vari Notch Duplexers 6 Cavities Copyright 1997 TX RX Systems Inc Version Number...

Страница 3: ...r damage caused by lightning or other natural disasters No product will be accepted for re pair or replacement without our prior written approval All Shipping charges on returned products must be prep...

Страница 4: ...t which is cut to 1 2 of the other or remaining channels pass frequency This effectively places a relatively large imped ance in parallel with the antenna insuring a good impedance match between the o...

Страница 5: ...the an tenna feedline to the duplexer making sure to con nect the correct equipment to the correct port Labels are affixed next to each port port labels to help you make the right connections In addit...

Страница 6: ...ncy and the rejec tion notch Adjustment of the coarse and fine tun ing rods will allow the filters passband to be centered at the desired frequency The rejection notch frequency is adjusted by turning...

Страница 7: ...ses through the filter All Vari Notch filters should be temporarily re moved from the system and tuned on the bench using test instrumentation only Do not adjust the filters while they are under trans...

Страница 8: ...graticule line on the IFR A 7550 s display Refer to figure 4 The resonant frequency is adjusted by using the coarse tuning rod which is a sliding adjustment invar rod that rapidly tunes the response c...

Страница 9: ...or access bar rel is omitted and a 10 32 inch screw must then be removed from the loop plate assembly to gain ac cess to the piston trimmer under the plate Checking the rejection notch 1 The rejection...

Страница 10: ...ties in the channel The channels passband is that fre quency range over which the return loss is 15 dB or greater 11 Fine tune the passband for the entire channel for maximum return loss by gently adj...

Страница 11: ...ttenuation so that the peak or lowest value on the rejection notch is displayed 18 The cavities rejection notches are adjusted for maximum rejection by gently turning the variable capacitors in the lo...

Страница 12: ...y the reflected impedance of the Duplexer off resonance transformed by changing cable lengths can cause parasitics to be generated 9 Duplexer transmitter mixing with another outside transmitter produc...

Страница 13: ...n can be obtained by cascading isolators if needed However IM of this magnitude indicates the system should be studied for possible revision to reduce the production of this IM 11 Cables such as RG 8a...

Страница 14: ...OUT VS INSERTION LOSS The graph below offers a convenient means of determining the insertion loss of filters duplexers multicouplers and related products The graph on the back page will allow you to...

Страница 15: ...200 100 50 40 30 20 10 5 0 4 0 3 0 2 0 1 0 0 5 40 20 10 8 0 6 0 4 0 2 0 1 0 0 8 0 6 0 4 0 2 1 1 1 1 15 1 1 2 1 1 25 1 1 3 1 1 4 1 1 5 1 1 6 1 1 8 1 2 0 1 2 5 1 3 0 1 V S W R REFLECTED POWER WATTS FOR...