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RF Technology PA70                                                                                     Page 3 

 

    

 

 

 

 

 

             1  OPERATING INSTRUCTIONS 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Operating Instructions 

 
 
1.1

 

Front Panel Indicators

 

 

 

PWR LED 

 

The Power LED shows that the dc supply is connected to the transmitter. 

 

RFO LED 

 

The RF Output LED indicates that the amplifier is being driven and that the 
forward output power is above a present level.   The indication level is set by 
RV1 which is accessible through the side of the case. (After removing 20 
screws) 

 

TEMP LED 

 

The Temperature LED indicates when the amplifier temperature is too high.   
The power is automatically reduced if the output transistors temperature rises 
above safe limits. 

 

1.2 

Internal Adjustments 

 

All internal adjustments are factory set and should not need re-adjustment 
unless the operating frequency is changed. 

 

Output Power 

 

The output power is set to the desired level watts by RV2.   It determines the 

 

threshold of the ALC voltage which is fed back to the transmitter module to  

 
 

Warning 

 

Changes or modifications not expressly approved by 
RF Technology could void your authority to operate 
this equipment.   Specifications may vary from those 
given in this document in accordance with requirements 
of local authorities.   RF Technology equipment is 
subject to continual improvement and RF Technology 
reserves the right to change performance and specifications 
without further notice. 

Summary of Contents for Eclipse PA70

Page 1: ...hnology rfinfo rftechnology com au January 2004 PA70 Amplifier Operation and Maintenance Manual This manual is produced by RF Technology Pty Ltd 10 8 Leighton Place Hornsby NSW 2077 Australia Copyrigh...

Page 2: ...lignment Procedure 6 3 1 Standard Test Conditions 6 4 Specifications 8 4 1 Description 8 4 2 Physical Configuration 8 5 Front Indicators and Test Points 9 5 1 Indicators 9 5 2 Test Points 9 6 Electric...

Page 3: ...tomatically reduced if the output transistors temperature rises above safe limits 1 2 Internal Adjustments All internal adjustments are factory set and should not need re adjustment unless the operati...

Page 4: ...PA70 Amplifier I O Connections 25 Pin Connector Function Signal Pins Specification DC Power 12 Vdc 0 Vdc 1 2 14 15 12 13 24 25 11 4 to 16 Vdc ALC Output 8 Approx 7 Vdc decreasing with increasing power...

Page 5: ...n 80dBc The filter uses a combination of lumped elements and printed microstrips to obtain the required harmonic attenuation 2 4 Power Control Circuits The forward and reverse voltages from the direct...

Page 6: ...cedure may be used to align the amplifier for optimum performance 3 1 Standard Test Conditions RF Input Source T70 series transmitter set for 10 Watts maximum output The ALC output from the PA70 must...

Page 7: ...21 and C22 for maximum output power 5 As above Refl Pwr 0 Output 70W Repeat 3 and 4 until no further improvement is obtained 6 As above Output power from the PA70 Key the transmitter and adjust RV2 to...

Page 8: ...ion is provided by connecting the output of the directional coupler to the ALC input of the T70 The drive from the transmitter module is then automatically adjusted to maintain the required output The...

Page 9: ...dc pin 5 6 Electrical Specifications 6 1 Power Requirements Operating Voltage 10 5 to 16 Vdc with output power reduced below 12 5 Vdc Current Drain 13 2 Vdc 10 Amps Max at 70 Watts 100 mA Max standby...

Page 10: ...for connection to the T70 It supplies a voltage which decreases with increasing power or temperature 6 9 Mis Match Protection The amplifier is protected from damage when operating into a VSWR of 5 1...

Page 11: ...P 500V MICA SM1210 48 3003 020P C51 CAP 27P 5 NPO SM1206 46 3300 027P C52 CAP 27P 5 NPO SM1206 46 3300 027P C53 CAP 1NO 5 63V NPO SM1206 46 3300 01N0 C54 CAP 1NO 5 63V NPO SM1206 46 3300 01N0 C55 CAP...

Page 12: ...RES 10R 5 0 25W AXIAL 51 1010 0010 R21 RES 0 1R 5 10W ASW 10 51 0010 00R1 R23 RES 10K 5 0 25W AXIAL 51 1040 010K R24 RES 270R 5 0 25W AXIAL 51 1040 0270 R25 RES 270R 5 0 25W AXIAL 51 1040 0270 R26 RE...

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Page 14: ...PWR OV E R T E MP I cB I cA 0V RF DE T I NPU T OU T PU T 13 25 12 24 11 23 10 22 9 21 8 20 7 19 6 18 5 17 4 16 3 15 2 14 1 P5 CONNE CT OR DB 25 J3 J1 P1 J2 P2 P3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1...

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