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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 

12 

Revision E 

 

f) 

Return  sweep/generator  output  level  to  full  deflection.  Rotate  the 
step attenuator (CCW) so that the output is reduced by 50 dB. 

g) 

Reconnect the A150 into the test set-up of Figure  4-1.  

h) 

Place the A150 power switch to the "ON" position. 

i) 

Observe the gain versus frequency sweep on the oscilloscope. 

 

The average gain  should be greater 50 dB  

 

The gain variation should be within the 3 dB as shown on the 
oscilloscope. 

 
 
 
4.4.2     Measurement of Harmonics  
 

 

 
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, then proceed as follows: 

 
a) 

Adjust the signal generator to a CW center frequency of 300 kHz, for an 
indicated output of 125 watts on the power meter. 

b) 

Using  the  spectrum  analyzer,  check  that  the  level  of  the  carrier 

30 dB 
coupler 

Summary of Contents for A150

Page 1: ...hout notice August 2012 Revision E 1 A150 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...

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: ...M 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 impedance It is...

Page 4: ...m input signal 1 0 Volts RMS for all output load conditions without damage POWER OUTPUT METER True RMS power detection 3 of full scale accuracy POWER REQUIREMENTS 100 240 VAC 47 63 Hz SIZE 5 3 x 16 5...

Page 5: ...1 V rms indicated maximum input voltage is 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...

Page 6: ...icted If the fault persists please contact Field Service 2 3 3 RS 232 Interface The A150 features a standard RS 232 serial interface suitable for connection to a PC or host system The communication pr...

Page 7: ...nt end The output signal of the MMIC is coupled to the gate of transistor Q1 The further amplified signal appearing at the drain of Q1 is coupled to the input of Q2 This is transformed to 50 and fed t...

Page 8: ...AC_line 110VAC_neutral earth_gnd SELV 5V Inhibit SELV 5V ret Inhibit_ret DC_ok DC_ok_ret 48V_ret 24V 24V_ret 48V A1 Fan 24V Ret 1 12 05 P1 5 9 4 8 3 7 2 6 1 J2 24V_ret 48V_ret RS232 Control Port J5 AC...

Page 9: ...a power level of 13dBm This chapter therefore deals only with certain fundamental procedures for fault location S1 VHF_splitter_20W RF_in RF_out1 RF_out2 50 ohm 34dBm 48V_ret 48V_ret 24V_ret 2100L SC...

Page 10: ...or 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...

Page 11: ...in 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 to the video sweep mod...

Page 12: ...rsus frequency sweep on the oscilloscope The average gain should be greater 50 dB The gain variation should be within the 3 dB as shown on the oscilloscope 4 4 2 Measurement of Harmonics Figure 4 2 1...

Page 13: ...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 ensur...

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