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19

Chapter 4

Tuning

Step-by-step instructions for tuning the TX3000 board follow. For the receiver see
RX 3000 Tuning Guide.

4.1. One (1) Opto TX Output

The following instruments are recommended for tuning:

−

Battery powered oscilloscope (two channels, cursor readout function

recommended).

−

10: 1 oscilloscope probe.

−

Multimeter.

4.2. Preparation

• Power OFF the TX3000 board (remove PWR connector at socket X1).

• Ensure that the antenna is connected to the correct socket (X5) on the TX3000
board.

• Turn the amplitude potentiometer R76 (LVL to almost (7/8) full power clockwise).

• Check the default setting of jumper J15 to J14 (see following the table).

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Summary of Contents for RX3000

Page 1: ...1 RF SYSTEM RS009 Manual TX3000 TUNING GUIDE ...

Page 2: ... Filter Part 7 1 2 Receiver Electronics 8 Chapter 2 RX3000 Filter Concept 8 Chapter 3 TX3000Cable Opto Synchronization Setting 9 3 1 TX3000 cable synchronization setting 9 3 2 TX3000 Opto Synchronization Setting 14 Chapter 4 Tuning 19 4 1 One 1 Opto TX Output 19 4 2 Preparation 19 4 3 Power On Adjustments 20 Chapter 5 Appendix 22 5 1 TX3000 Board 22 ...

Page 3: ...3000 electronics into operation For details on the receiver board see the RX 3000 Tuning Guide 1 1 Basic Description of the Transmitter Electronics Each transmitter electronic is able to feed one OEA antenna with a swept HF signal of 8 2 MHz In order to avoid disturbances between the emitted HF signals synchronization with other transmitters must be guaranteed ...

Page 4: ... optically transmitted synchronization signal may be repeated only once a master rack still has to be used if more than seven transmitters have to be synchronized The cable version of the TX3000 additionally allows the onboard generated master or received and then regenerated slave swept HF signal to be converted and optically transmitted in order to synchronize additional transmitters The two cab...

Page 5: ...5 ...

Page 6: ...6 ...

Page 7: ... equipped with two opto transmitters bi opto TX3000 board the swept HF signal will be automatically output see section 4 This allows the synchronization of two additional transmitters 1 1 2 Analog Part Different antenna types can to be connected to the relevant output circuit connector X4 The TX3000 mounted matching circuits and harmonic suppression filters are optimized for use with 200 Ohm anten...

Page 8: ...f TX3000 s are used this is done automatically and the power line between the transmitters is not longer than 6 8 2MHz meters If the length of the power cable between the transmitters is longer than 4 to 6 meters additional filter boards have to be use RX3000 boards use the same kind of filter Due to the limited space available however the RX3000 filter only protects the receiver electronics itsel...

Page 9: ... connect by twisted pair The system can provide two sets of cable out On the board of TX3000 it is annotated as X4 Cab Out N0 1 and 2 of X4 is the first group and N0 3 and 4 is the second group The setting of one group sync output is same to the two groups sync output refer to the above Each cable out should connect to the corresponding sockets E g If you use the first group of cable you should co...

Page 10: ...ets of cable in On the board of TX3000 it is annotated as X3 Cab In N0 1 and 2 of X3 is the first group and N0 3 and 4 is the second group You only need one group in actual use Each cable in should connect to the corresponding sockets E g If you use the first group of cable you should connect the N0 1 and 2 sockets of X3 refer to the figure of TX layout 2 ...

Page 11: ...11 ...

Page 12: ...12 ...

Page 13: ...d another repeater if there has no master The TX3000 board of level 1 bi opto version configured as master feeds the synchronization signal to the two TX3000 boards of level 2 bi opto version configured as slave The TX3000 board of level 2 can also feeds the synchronization signal of the level 1 to the TX3000 boards of level 3 A basic configuration following this rule is shown below If a system co...

Page 14: ...nsmitter to socket refers to the figure of TX Layout 1 If you use only one Opto synchronization output you must use TX1output Opto Out1 and J11 should be IN Or it will fail If you use two Opto synchronization outputs J11 should be OUT Or it can not achieve the second synchronization Opto Out2 E g If connect TX1 and TX2 refer to the figure TX Layout 1 J11 is OUT and J15 is 2 3IN it can achieve two ...

Page 15: ...15 ...

Page 16: ...16 ...

Page 17: ... following this rule is shown below The TX3000 board of level 1 bi opto version configured as master feeds the synchronization signal to the two TX3000 boards of level 2 bi opto version configured as slave These two boards acting as synchronization repeaters in turn each feed their optically transmitted signal to two following TX3000 boards of level 3 standard version configured as slave This way ...

Page 18: ... Opto cab Cablig from Master Rack If a system consists of more than seven transmitters a master rack has to be used as a synchronization source A possible configuration using a master rack and TX3000 is shown below ...

Page 19: ...powered oscilloscope two channels cursor readout function recommended 10 1 oscilloscope probe Multimeter 4 2 Preparation Power OFF the TX3000 board remove PWR connector at socket X1 Ensure that the antenna is connected to the correct socket X5 on the TX3000 board Turn the amplitude potentiometer R76 LVL to almost 7 8 full power clockwise Check the default setting of jumper J15 to J14 see following...

Page 20: ... the emitted signal at both of the corresponding test points located to the left and right of the antenna connector P4 GND and P5 GND see TX Layout5 The signal shapes may be varying A signal breakdown or variation of more than 20 of average the value indicates a faulty transmitter or antenna Remark The signal on P4 and P5 is usually not identical Proceed with the RX3000cording to the instructions ...

Page 21: ...21 ...

Page 22: ... G F NOTE A Cable output socket B Optical cable input socket C Power input socket D Power output socket E Cable input socket F Optical cable output socket 1 G Optical cable output socket 2 H Antenna output socket 5 2 Socket Specifications Cable socket ...

Page 23: ... system using this socket not only can save the number of transmitters but also play a role in synchronization Antenna output socket 8 2MHz RF signal enter into the TX antenna through the socket Ensure that the TX antenna is connected to NO 1 and NO 3 of the socket Power input socket Available to the transmitter s supply voltage is through the socket Ensure that the power connector is connected to...

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