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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 

14 

Revision F 

 

c) 

Spectrum Analyzer.   

d) 

Attenuator (30dB) 

e) 

Coupler (30 dB) 

 

2.) 

Connect the Equipment as shown in Figure 4-2, then proceed as follows: 

 
a) 

Adjust  the  signal  generator  to  a  CW  center  frequency  of  9  kHz,  for  an 
indicated output of 1000 watts on the power meter. 

b) 

Using  the  spectrum  analyzer,  check  that  the  level  of  the  carrier 
harmonics is less than -25 dB with respect to the carrier while manually 
scanning  the frequency  band  of  10 KHz  to  2  MHz.  An  indicated  power 
output of 1000W should be maintained during this operation. 

 
 
4.5     PACKAGING FOR RESHIPMENT 
 
In the event of the equipment being returned for servicing it should be packed in 
the original shipping carton and packing material. If this is not available, wrap the 
instrument  in  heavy  paper  or  plastic  and  place  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  shock.  Close  the  carton  securely  and  seal  with  durable 
tape. Mark the shipping container FRAGILE to ensure careful handling. 

 

 

 
Chapter 5 Safety: 
 

Do  not  attempt  to  operate  this  unit  with  the  cover  removed.  High  AC  and  DC 
voltages are present. The cover protects against electrical shock due to AC line 
voltages,  high  DC  and  RF  fields.  Further  the  cover  provides  part  of  the  cooling 
system  design.  Components,  specifically  on  the  RF  driver  board  are  prone  to 
over-heat and eventual failure if the unit is operated without the cover in place. 
 
Ensure that the load is connected to the output prior to connecting the RF input 
to  the  unit.  This  will  prevent  high  voltages  being  present  and  exposed  at  the 
output connector.  
 
Only use the AC cord provided or equivalent.  
 
Ensure that the mains outlet is properly grounded. 
 

Summary of Contents for 1140LA

Page 1: ...out notice August 2012 Revision F 1 1140LA 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 vol...

Page 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...

Page 3: ...y inputs of AM FM SSB pulse and any complex modulation signals The amplifier has 55 dB gain it is unconditionally stable and will not oscillate even with combinations of mismatched source and load imp...

Page 4: ...Unit will withstand a 13dBm input signal 1 0 Volts RMS for all output load conditions without damage POWER OUTPUT METER RMS power detection 3 of full scale accuracy 100 KHz 1 MHz 10 100 KHz see table...

Page 5: ...a standard rack 2 2 1 Mains Voltage The unit accommodates AC line voltages from 100 TO 240 VAC 47 63 Hz 2 3 OPERATION A fixed line cord is supplied to form a connection between the mains supply and t...

Page 6: ...condition such as Overheat heat sink temperature is too high for reliable operation PSU fault internal fault in the main switching power supply In the event of a fault the unit may be reset by cyclin...

Page 7: ...alog to be stored to disk using the capture feature of the terminal program Single character commands can be sent to the amplifier to achieve the following 1 key enables telemetry readback similar to...

Page 8: ...r amplifier modules In each PA module the signal is split into two equal phase and amplitude signals These signals are fed to the inputs of transistors Q1 and Q2 The amplified signals appearing at the...

Page 9: ...d it is subject to change without notice August 2012 9 Revision F Combiner Splitter Driver 1 2100L PA Coupler 24 Volt To Page 2 a RF IN RF OUT To Page 2 b To Page 2 c To Page 2 b 48 Volt 48 Volt RF De...

Page 10: ...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...

Page 11: ...ator HP 8601 or similar capable of sweeping the frequency range 9 KHz to 2 MHz to the input connector c Adjust the output level of the sweep generator so that a 50 ohm video detector connected at the...

Page 12: ...D151 e Attenuator 30 dB 5000 Watts 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 l0...

Page 13: ...ull deflection Rotate the step attenuator CCW so that the output is reduced by 50 dB g Reconnect the 1140LA into the test set up of Figure 4 1 h Place the 1140LA power switch to the ON position i Obse...

Page 14: ...ap the instrument in heavy paper or plastic and place in a rigid outer box of wood fiberboard or very strong corrugated cardboard Use ample soft packing to prevent movement Provide additional support...

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