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PAGE  26

 

RETURNING YOUR  PRODUCT  FOR SERVICE 

Returning  a  product  to  LDG  is  easy.  We  do  not  require  a  return  merchandise  authorization, 

and  there  is  no  need  to  contact  LDG  to  return  your  product.  Visit  the  LDG  web  site  and 
download  the  LDG  Product  Repair  Form.  On  the  Repair  Form  tell  the  LDG  technicians  exactly 
what  happened  or  didn’t  happen  and  why  you  believe  the  product  needs  servicing.  The 
technician  attempts  to  duplicate  the  problem(s)  you  had  based  on  how  well  you  describe  it  so 
take the time  to be accurate  and complete.   

Ask  your  shipper  for  a  tracking  number  or  a  delivery  verification  receipt.  This  way  you  know 

the  product  arrived  safely  at  LDG.  Be  sure  to  give  us  your  email  address  so  our  shipper  can  alert 
you  online  when  your  product  is  en-route  back  to  you.  Please  be  assured  that  our  staff  makes 
every  effort  to complete  repairs  ahead of our  published  wait  time.  Your  patience  is  appreciated.   

Repairs  can  take  six  to  eight  weeks,  but  are  usually  faster.  The  most  recent  information  on 

returning  products  for  service  is  found  on  the  LDG  website  under  Support,  then  Tech  Support. 
Send your  carefully  packaged  unit  with  the  Repair  Form  to: 

 

 

LDG  Electronics,  Inc. 

Attn:  Repair  Department 

1445 Parran  Rd 

St. Leonard,  MD 20685

 

 

PRODUCT  FEEDBACK 

We  encourage  product  feedback!  Tell  us  what  you  really  think  of  your  LDG  product.  In  a 

card,  letter,  or  email  (preferred)  tell  us  how  you  used  the  product  and  how  well  it  worked  in  your 
application.  Send  along  a  photo  or  even  a  schematic  or  drawing  to  illustrate  your  narrative.  We 
like  to  share  your  comments  with  our  staff,  our  dealers,  and  even  other  customers  at  the  LDG 
website: 

 

http://www.ldgelectronics.com

 

 

Summary of Contents for AT-600Pro

Page 1: ...ONS MANUAL MANUAL REV A PAGE 1 LDG AT 600Pro 600W Automatic Antenna Tuner LDG Electronics 1445 Parran Road St Leonard MD 20685 2903 USA Phone 410 586 2177 Fax 410 586 8475 ldg ldgelectronics com www l...

Page 2: ...Tune 15 Bypass Mode 16 Error Indication 16 Advanced Operation 18 Manual Inductor Capacitor Adjustments 18 High Low Relay Adjustment 18 Manual Memory Store 18 Status Check 19 Application Notes 20 Mobil...

Page 3: ...or even newer high power transceivers JUMPSTART OR REAL HAMS DON T READ MANUALS Ok but at least read this one section before operating the AT 600Pro Connect a 50 ohm coax jumper cable from the antenna...

Page 4: ...to 16 VDC 1A max 7mA when idle Dimensions 10 5 x 8 5 x 2 8 Weight 3 pounds AN IMPORTANT WORD ABOUT POWER LEVELS The AT 600Pro is rated at 700 watts maximum power input at most Many amplifiers output w...

Page 5: ...C Dn Manually decrease capacitance L Up Manually increase inductance L Dn Manually decrease inductance Tune Initiates memory or full tuning cycle Momentary push places tuner in bypass PWR Meter Bargr...

Page 6: ...coax feedline to this SO 239 connector Ant 2 Connect a second 50 ohm antenna coax feedline to this SO 239 connector Gnd wing nut Connect to the antenna system ground Tx Connect a 50 ohm jumper coax f...

Page 7: ...ting the AH 3 or AH 4 external tuner connect the 4 pin Molex connector of the optional ICOM interface cable to the radio s Tuner port Then connect the 1 8 stereo plug on the other end of the ICOM inte...

Page 8: ...PAGE 8...

Page 9: ...PAGE 9 Note Optional Y ACC cable has a red plug on the radio end of the cable and a black plug on the tuner end...

Page 10: ...tton is held for one half to 2 5 seconds and then released Long Press The button is held for more than 2 5 seconds and then is released FUNC Button The FUNC button is pressed first then the button is...

Page 11: ...Average mode is suitable for 100 duty cycle modes such as FM RTTY or PSK Peak mode is more useful on modes with varying duty cycle such as SSB or AM The factory default is average mode To toggle betwe...

Page 12: ...there is RF present and the SWR exceeds a pre set level The default setting is fully automatic tuning mode To toggle between semi and fully automatic modes press Func C Dn The LED display will show o...

Page 13: ...ewly selected antenna are also recalled This is useful when comparing antenna performance on the same frequency Transmitting and Receiving During receive operation only the antenna and bypass indicato...

Page 14: ...d tuning sequence where the AT 600Pro rapidly tries varying combinations of inductance and capacitance values and then zeroes in on the best match possible When the tuning cycle is complete if an acce...

Page 15: ...ory tuning cycle Again bypass the amplifier while tuning The AT 600Pro will not tune if the transmit power is over 150 watts or if the transmit power exceeds 100 watts during high SWR conditions in or...

Page 16: ...t panel LEDs in a particular fashion The following errors are reported ERR_NO_MATCH Unable to find a suitable match Upon completing an entire full tuning cycle no combination of inductors and capacito...

Page 17: ...dditionally if the forward power exceeds the maximum value selected for the meter scale the PWR LEDs will blink an over range condition The four right most LEDs of the PWR bargraph will cycle during o...

Page 18: ...ays the state of the High Low Impedance relay Repeatedly press one of these buttons to increase or decrease multiple times or simply hold the button and the button will auto repeat You may also transm...

Page 19: ...press the L Dn Thresh button The display will show the currently selected SWR threshold value While holding the Func button the bargraph display will show the following pattern to indicate that the AT...

Page 20: ...your transceiver s built in SWR meter will show the tuner s progress Remember to keep your eyes on the road however In most cases a match will be recalled from memory so the SWR will snap to a low va...

Page 21: ...e transmission line can be thought of as a long string of capacitors and inductors in series parallel and the antenna is a kind of resonant circuit At any given RF frequency each of these can exhibit...

Page 22: ...a This circuit measures forward and reflected power from which SWR may be calculated some meters calculate SWR for you More advanced units can measure forward and reflected power simultaneously and sh...

Page 23: ...digital converters that provide signals proportional to the forward and reflected power levels The single lead primary through the center of the sensor transformer provides RF current sampling Diodes...

Page 24: ...pacitance Toggle Auto Semi Mode Display Auto Semi Selection L Up Increase Inductance Set PWR Meter Scale Display PWR Meter Scale L Dn Decrease Inductance Set Auto Tuning SWR Threshold Display Auto Tun...

Page 25: ...ase decision TWO YEAR TRANSFERRABLE WARRANTY Your product is warranted against manufacturer defects in parts and labor for two full years from the date of purchase This two year warranty is also trans...

Page 26: ...nline when your product is en route back to you Please be assured that our staff makes every effort to complete repairs ahead of our published wait time Your patience is appreciated Repairs can take s...

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