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The material contained in this document is the property of Electronics & Innovation Ltd., it is 
subject to change without notice.  

 

August 2012                                                                                                                        Revision D                                                                                                                   

 

 

 

 
 

 

Chapter 4 Maintenance 

 
4.1 INTRODUCTION 
 
The E&I 2500L RF amplifier requires no periodic maintenance. The instrument is 
unconditionally stable and is fail-safe under all load conditions. Damage can only 
be externally caused by the incorrect selection of the AC supply voltage or by an 
input  signal  in  excess  of  the  specified  1  volt  rms  equivalent  to  a  power  level  of 
16dBm. 
 
This  chapter  therefore,  deals  only  with  certain  fundamental  procedures  for  fault 
location. 
 
Performance  limits  quoted  are  for  guidance  only  and  should  not  be  taken  for 
guaranteed  performance  specifications  unless  they  are  also  quoted  in  the 
Specification Section 1.2. 

Содержание 2500L

Страница 1: ...out notice August 2012 Revision D 1 2500L Broadband Power Amplifier HIGH RF VOLTAGES MAY BE PRESENT AT THE OUTPUT OF THIS UNIT All operating personnel should use extreme caution in handling these volt...

Страница 2: ...lly operational such that it performs according to the original specifications free of charge to the original purchaser Should warranty service be required the unit must be returned to E I freight cos...

Страница 3: ...ts of AM FM SSB pulse and any complex modulation signals The amplifier has 60 dB gain it is unconditionally stable and will not oscillate even with combinations of mismatched source and load impedance...

Страница 4: ...conditions without damage POWER OUTPUT METER True RMS power detection 5 of full scale accuracy POWER REQUIREMENTS 200 240VAC Single Phase 47 63 Hz SIZE 24 X 16 75 X 20 inches 330 X 425 x 508 mm WEIGHT...

Страница 5: ...times the level of the input signal required to achieve maximum output Input voltages in excess of 2 volts peak may permanently damage the instrument iii Connect the output via a 50 ohm coaxial lead a...

Страница 6: ...t system The communication protocol is extremely simple to facilitate readback and control with readily available terminal programs such as Hyperterm The RS 232 link has the following parameters Baud...

Страница 7: ...port The driver output signal are fed through a length of coaxial cable to the input of a power splitter the outputs of this are fed to the power amplifier modules In each PA module the signal is spli...

Страница 8: ...RF IN RF OUT To Page 2 c RF Detect 2500L RF Amplifier Splitter Driver 1 24 Volt To Page 2 a To Page 2 b To Page 2 b 42 Volt 42 Volt 2100L PA 2100L PA 2100L PA Driver 1 Splitter 2100L PA 42 Volt Splitt...

Страница 9: ...nd is fail safe under all load conditions Damage can only be externally caused by the incorrect selection of the AC supply voltage or by an input signal in excess of the specified 1 volt rms equivalen...

Страница 10: ...tput level of the sweep generator so that a 50 ohm video detector connected at the output of the unit will not be damaged by excessive power output Reference section 4 4 1 for set up d Observe the gai...

Страница 11: ...tts Bird Figure 4 1 Gain Measurement 2 Connect the equipment as shown in Figure 4 1 then proceed as follows a Set the oscilloscope to DC Time cm to Ext X and gain to l0mv cm b Set the sweep generator...

Страница 12: ...ction Rotate the step attenuator CCW so that the output is reduced by 50 dB g Reconnect the 2500L into the test set up of Figure 4 1 h Place the 2500L power switch to the ON position i Observe the gai...

Страница 13: ...in a rigid outer box of wood fiberboard or very strong corrugated cardboard Use ample soft packing to prevent movement Provide additional support for projecting parts to relieve these of unnecessary s...

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