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The material contained in this document is the property of Electronics & Innovation Ltd., it  is 
subject to change without notice.  
 
May 2016 

Revision G 

 

 
4.2.1  Initial Check 
 
The    following    check    can    be    made    after    repair    and    adjustments    or 
whenever the condition of the unit is in question. 
 

a. 

Connect  AC  power  supply.  Switch  on  power  and  observe  that  the 
display initializes. 

 

b. 

Connect a sweep generator (HP 8601 or similar) capable of sweeping 
the frequency range 250 KHz to 150 MHz, to the input connector. 

 

c. 

Adjust the output 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 gain versus frequency ripple on an oscilloscope calibrated 
in decibels. The gain variation must be not more than +/- 1.5 dB over 
the frequency range. 

 

e. 

Connect  a  calorimetric  power  meter  (HP434  or  equivalent)  through  a 
10 dB 200 watt attenuator to the output connector. Adjust the input CW 
signal to any frequency between  250 kHz and 150 MHz for 100 watts 
output. 

 

f. 

Observe the harmonic distortion of the output on a spectrum analyzer. 
The  harmonic  components  contributed  by  the  amplifier  should  be 
better than 25 dB down from the fundamental. 

 

(a) 

If the above items are found to be outside of the specification, check 
the  spectral  content  of  the  input  signal.  If  this  is  a  pure  signal  then 
the unit needs to be returned to the factory for service.  

 
 
 
 
 
 
 
4.3.1    Measurement of Gain 
 
1.     Equipment Required (or equivalent): 
 

a) 

Osilloscope - Tektronix T921 

b) 

Sweep/Generator -  HP8601A 

c) 

Signal Generator -  Exact Model 7060 

Summary of Contents for 3100LA

Page 1: ...F VOLTAGES MAY BE PRESENT AT THE OUTPUT OF THIS UNIT All operating personnel should use extreme caution in handling these voltages and be thoroughly familiar with this manual Do not attempt to operate...

Page 2: ...ly 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 cost...

Page 3: ...FM SSB pulse and any complex modulation signals The amplifier has 50 dB gain it is unconditionally stable and will not oscillate even with combinations of mismatched source and load impedance It is p...

Page 4: ...n 3 of full scale accuracy POWER REQUIREMENTS 100 240 VAC 47 63 Hz SIZE 5 3 5 3 x 16 5 x 18 4 134 134 5 mm x 420 mm x 467 mm WEIGHT 52 pounds 23 6 kg CONNECTORS N OPERATING TEMPERATURE 0 40 C RACK MOU...

Page 5: ...ii Connect the output via a 50 ohm coaxial lead and N plug to the load iv Connect the input signal via a 50 ohm coaxial lead and N plug to the input connector 2 3 2 Front Panel Display The 3100LA fron...

Page 6: ...ailable terminal programs such as Hyperterm The RS 232 link has the following parameters Baud rate 19200 Data bits 8 Parity none Stop bits 1 Flow control none An example configuration using HyperTermi...

Page 7: ...The driver output signal is fed through a length of coaxial cable to the input of the splitter network The two output signals are fed to the two power amplifiers Each amplifier has a four way splitter...

Page 8: ...an 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 13dBm This chapter therefore...

Page 9: ...bserve the gain versus frequency ripple on an oscilloscope calibrated in decibels The gain variation must be not more than 1 5 dB over the frequency range e Connect a calorimetric power meter HP434 or...

Page 10: ...ep generator to the video sweep mode with the start frequency at 150 kHz and the sweep width to 150 MHz c Disconnect the 3100LA from the set up and connect the sweep generator RF output directly to th...

Page 11: ...armonics Figure 4 2 1 Equipment Required a Sweep Signal Generator b Calorimetric Power Meter HP435B c Spectrum Analyzer d Attenuator 30dB e Coupler 30 dB 2 Connect the Equipment as shown in Figure 4 2...

Page 12: ...ck 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...

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