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Broadcast Warehouse TX 25/50, Техническое руководство

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Broadcast Warehouse TX 25/50 Скачать руководство пользователя страница 37

TX25/50 FM Transmitter technical manual

page 37

Technical data

3.6

PARTS LIST

3.61 LCD control board

RESISTORS

R1

33K

1/8 Watt Carbon Film

R2

33K

1/8 Watt Carbon Film

R3

820R

1/8 Watt Carbon Film

R4

390R

1/8 Watt Carbon Film

R5

390R

1/8 Watt Carbon Film

R6

10K

1/8 Watt Carbon Film

R7

820R

1/8 Watt Carbon Film

R8

820R

1/8 Watt Carbon Film

R9

820R

1/8 Watt Carbon Film

R10

820R

1/8 Watt Carbon Film

R11

820R

1/8 Watt Carbon Film

R12

1K8`

1/8 Watt Carbon Film

R13

1K8

1/8 Watt Carbon Film

R14

1K8

1/8 Watt Carbon Film

R15

100R

1/8 Watt Carbon Film

R16

33K

1/8 Watt Carbon Film

R17

620R

1/8 Watt Carbon Film

R18

100R

1/8 Watt Carbon Film

R19

100K

1/8 Watt Carbon Film

R20

100R

1/8 Watt Carbon Film

R21

4K7

1/8 Watt Carbon Film

R22

100R

1/8 Watt Carbon Film

R23

10K

1/8 Watt Carbon Film

R24

10K

1/8 Watt Carbon Film

R25

-

not fitted

R26

-

not fitted

CAPACITORS

C1

47U

Miniature Radial Electrolytic

C2

47U

Miniature Radial Electrolytic

C3

33PF

Ceramic Plate 2.5 pitch (680)

C4

33PF

Ceramic Plate 2.5 pitch (680)

C5-11

560PF

Ceramic Plate 2.5 pitch (680)

C12

100N

Monolithic Ceramic 2.5 pitch

C13

2U2

Miniature Radial Electrolytic

C14

560PF

Ceramic Plate 2.5 pitch (680)

C15

100N

Monolithic Ceramic 2.5 pitch

C16

560PF

Ceramic Plate 2.5 pitch (680)

C17

560PF

Ceramic Plate 2.5 pitch (680)

C18

2U2

Miniature Radial Electrolytic

MISC

VR1

5K

5mm MiniPot

VR2

100K

5mm MiniPot

D1

-

LINKED ON PCB

D2

-

WIRE LINK

LED1

1N4148

400mW Glass Axial

LED2

GREEN

3MM GREEN LED

LED3

RED

3MM RED LED

X1

8MHZ

HC49/U microprocessor crystal

REG1

7805

TO220 1A 5 V regulator

IC1

PIC16F877

40 pin 8 Bit micro Controller

IC2

CA3240

op-amp

T1

TIP32A

PNP Transistor

SW1-3 BUTTONS

Blue buttons

CON1

10W IDC

IDC boxed header

CON2

16W IDC

IDC boxed header

LCD1

122x32

NAN YA LMD62S042JM

3.62 Power amplifier board

RESISTORS

R1

3K3

1/4 Watt Metal Oxide

R2

S.O.T

1/4 Watt Metal Oxide

R3

-

NOT FITTED

R4

3K3

1/4 Watt Metal Oxide

R5

13K

1/4 Watt Metal Oxide

R6

10K

1/4 Watt Metal Oxide

R7

10K

1/4 Watt Metal Oxide

R8

18K

1/4 Watt Metal Oxide

R9

18K

1/4 Watt Metal Oxide

R10

75R

1/4 Watt Metal Oxide

R11

560R

3 Watt

R12

3R3

2 Watt

R13

6K8

1/4 Watt Metal Oxide

R14

560R

1/4 Watt Metal Oxide

R15

150R

1 Watt

R16

150R

1 Watt

R17

51R

1/4 Watt Metal Oxide

R18

-

NOT FITTED

R19

10R

1/4 Watt Metal Oxide

R20

820R

1/4 Watt Metal Oxide

R21

820R

1/4 Watt Metal Oxide

R22

470R

1/4 Watt Metal Oxide

R23

10K

1/4 Watt Metal Oxide

R24

10K

1/4 Watt Metal Oxide

R25

10K

1/4 Watt Metal Oxide

R26

-

NOT FITTED

R20

820R

1/4 Watt Metal Oxide

R21

820R

1/4 Watt Metal Oxide

R22

470R

1/4 Watt Metal Oxide 

R23

10K

1/4 Watt Metal Oxide

R24

470R

1/4 Watt Metal Oxide

R25

10K

1/4 Watt Metal Oxide

R26

12R

1/4 Watt Metal Oxide

R27

12R

1/4 Watt Metal Oxide

R28

-

NOT FITTED

R29

330R

1/4 Watt Metal Oxide

R30

470R

1/4 Watt Metal Oxide

R31

10K

1/4 Watt Metal Oxide

R32

470R

1/4 Watt Metal Oxide

R33

1K

1/4 Watt Metal Oxide

R34

1K

1/4 Watt Metal Oxide

R35

39R

SMD 2512

VR1

10K

pot

VR2

1K

pot

VR3

1K

pot

CAPACITORS

C1

470PF

5mm pitch

C2

47PF

Disc Ceramic 2.5mm pitch

C3

120PF

Disc Ceramic 2.5mm pitch

C4

100PF

Disc Ceramic 2.5mm pitch

C5

10N

Disc Ceramic 2.5mm pitch

C6

0.1U

Min Polyester

C7

330PF

Disc Ceramic 2.5mm pitch

C8

22U

Electrolytic 63V Radial

C9

22U

Electrolytic 63V Radial

C10

10N

Disc Ceramic 2.5mm pitch

C11

100U

Electrolytic 63V Radial

Содержание TX 25/50

Страница 1: ...written permission from Broadcast Warehouse The information and specifications contained in this document is subject to change at any time without notice Copyright 2001 Broadcast Warehouse For the la...

Страница 2: ...jumpers 2 52 Multiplex Broadband Input 2 53 Stereo With Limiters 2 54 Stereo With Limiters Disabled 2 55 Mono From Two Channels 2 56 Mono From One Channel 2 6 Other Setup Considerations 3 Technical d...

Страница 3: ...ring accuracy nor mally only found on expensive test equipment Local and remote personal computer control and metering are achievable via the innovative dual method RS232 interface The FM modulator se...

Страница 4: ...el Failure to do so may increase the risk of equipment failure shock and fire hazard R F The N type R F power output socket contains R F voltages which may burn or present a shock Please make sure tha...

Страница 5: ...D type pin out Pin 1 PLL failure alarm O C Pin 2 Reserved Pin 3 Reserved Pin 4 R F failure alarm O C Pin 5 R F failure alarm TTL Pin 6 Mod failure alarm TTL Pin 7 PLL failure alarm TTL Pin 8 R F Mute...

Страница 6: ...up down buttons will allow power control if internally allowed The maximum output power is governed by the maximum power set adjustment see R F pwr control section If the frequency is set internally w...

Страница 7: ...r as 8 represents 100 KHz on the 12 5 KHz switch 8 x 0 125MHz 0 1MHz 100KHz The LCD display on the front panel will display the frequency that you have set on the internal switches If you try to adjus...

Страница 8: ...ill allow the LCD screen to provide adjustment of the R F power down from that maximum power set point This can be desir able in transmitter hire situations where you wish to govern the maximum output...

Страница 9: ...e RS232 MODULATION FAILURE The Modulation failure alarm will be set if during normal operation the peak deviation of the transmitter drops and remains below 16 KHz The 16 KHz alarm level allows the al...

Страница 10: ...your other signals via the push snap terminals a 9 way serial lead from your computer can be plugged into the expansion boards 9 way D type socket The above item is an optional extra and is available...

Страница 11: ...software but it should be pretty much straight forward Operation The transmitter will respond to certain key presses and each one has a certain function See the list below for details of what key to p...

Страница 12: ...gain as an example You press the R F mute key o and then press refresh screen key ENTER to get a status update The transmitters power control circuitry may not have had time to turn the r f power down...

Страница 13: ...ereo 2 5 MODES OF OPERATION The transmitter is fully configurable and can be set up to support various modes of operation The mode of opera tion is set by the configuration of the internal jumpers Thi...

Страница 14: ...e There are two different standards in use worldwide In Europe and Africa the standard is normally 50uS This represents a lift of about 3dB at 3 KHz and 10dB at 10 KHz In the Americas and in Japan mor...

Страница 15: ...tion This one jumper controls both channels because the gain reduction control voltage which this jumper disables is common to left and right Even with the limiter disabled you may still wish to use t...

Страница 16: ...iter module and to the back panel multiplex output BNC socket See loopthrough mode below JUMPERS J1 ON J2 3 50 or 75 J4 5 LOUD or CLARITY J6 7 ON J8 ON J9 10 ON J11 ST J12 OFF Stereo with internal lim...

Страница 17: ...ct the signal from the internal limiter and stereo encoder to an external piece of equipment before being reinjected back into the transmitter via the multiplex input socket The most common applicatio...

Страница 18: ...tly boost loudness The gain controls on the back panel control the input drive to the limiter module and can be set so that limiting occurs for a given input level Factory setting is at maximum to ena...

Страница 19: ...hould now have the multiplex and pilot setup at the correct level All that is left to do is to set the input gain controls to your desired settings For most applications where you require a compressed...

Страница 20: ...any form of level control apart from the peak level clippers so we can set the system internal levels correctly 5 We should check that any offsets internal to the limiter are nulled out to keep distor...

Страница 21: ...r 75KHz peak deviation at 400Hz The pre emphasis filter can put the 15KHz audio 17db higher than 400Hz We strongly advise you to ensure pre emphasis is built into any external equipment if you decide...

Страница 22: ...level feed you may have to turn the gain controls down to stop internal clipping occurring prior to the limiter Please see note on pre emphasis at the end of the section You may also wish the limiter...

Страница 23: ...t level required to achieve limiting is frequency dependent due to the characterisTics of the pre emphasis curve There is 17dB more gain into the limiter with a 15KHz input signal compared to a freque...

Страница 24: ...d use as simple as possible FREQUENCY FINE TUNE WARNING ADVANCED TECHNICIANS ONLY While the frequency is controlled by the phase locked loop system the stability is governed by the stability of the re...

Страница 25: ...approvals 3 25W TX25 5 50W TX50 N type 50 ohm better than 65 dbc 75 dbc 87 5 108 MHz 100KHz from LCD or 12 5 KHz from internal switches Internal switches or LCD system Dual speed Phase locked loop 500...

Страница 26: ...Right audio signals are applied to balanced input XLR sockets on the back panel The balanced audio signals are fed to IC1 IC4 which are configured as differential amplifiers to convert the balanced i...

Страница 27: ...r is buffered by output op amp IC15 which also provides a fixed output level of 6dbu which is fed to the multiplex output BNC socket on the back panel as well as to one side of the loopthrough jumper...

Страница 28: ...ge adjusted over approx 1 to 28 volt range The RF output side of L4 and its network of series and shunt capactiors consisting of C18 21 provide impedance matching to the input of the elliptical low pa...

Страница 29: ...nto the LCD display by the LCD control bits on PORTC PORTE 3 bits has the remaining A D inputs Bit 0 is the PA volts Bit 1 is the Rev RF power and bit 2 is for the PA temperature The Microcontrollers...

Страница 30: ...TX25 50 FM Transmitter technical manual page 30 Technical data 3 3 BLOCK DIAGRAM...

Страница 31: ...ils W1 yellow green 16 0 2 W2 blue 24 0 2 W3 brown 24 0 2 W4 red 24 0 2 tri rated W5 yellow 24 0 2 W6 black 24 0 2 tri rated W7 black 24 0 2 W8 red 24 0 2 FILTERED IEC MAINS SOCKET RF MOD MON BNC S RG...

Страница 32: ...TX25 50 FM Transmitter technical manual page 32 Technical data 3 51 LCD control board...

Страница 33: ...TX25 50 FM Transmitter technical manual page 33 Technical data 3 52 Power amplifier board...

Страница 34: ...TX25 50 FM Transmitter technical manual page 34 Technical data 3 531Combo board limiter section...

Страница 35: ...TX25 50 FM Transmitter technical manual page 35 Technical data 3 532 Combo board stereo encoder section...

Страница 36: ...TX25 50 FM Transmitter technical manual page 36 Technical data 3 533 Combo board PLL exciter section...

Страница 37: ...or IC1 PIC16F877 40 pin 8 Bit micro Controller IC2 CA3240 op amp T1 TIP32A PNP Transistor SW1 3 BUTTONS Blue buttons CON1 10W IDC IDC boxed header CON2 16W IDC IDC boxed header LCD1 122x32 NAN YA LMD6...

Страница 38: ...0uF 16V Monolithic Ceramic 2 5 pitch C13 2 2 uF 16V Miniature Radial Electrolytic C14 100n Y5V Monolithic Ceramic 2 5 pitch C15 82pF Ceramic Plate 2 5 pitch 680 C16 100n Y5V Monolithic Ceramic 2 5 pit...

Страница 39: ...n IC Holders X 14 14 PIN 14 PIN 14 Pin IC Holders X 1 16 PIN 16 PIN 16 Pin IC Holders X 3 18 PIN 18 PIN 18 Pin IC Holders X 2 INDUCTORS L1 3 9mH 10RB Radial Inductor L2 4 7mH 10RB Radial Inductor L3 M...

Страница 40: ...l Oxide R103 5K1 1 4 Watt Metal Oxide R104 5K3 1 4 Watt Metal Oxide R105 100R 1 4 Watt Metal Oxide R106 3K6 1 4 Watt Metal Oxide R107 11K 1 4 Watt Metal Oxide R108 75R 1 4 Watt Metal Oxide R109 10K 1...

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