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Watkins-Johnson Company WJ-8718A, Дополнение к инструкции

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1 

 

This 

document 

and 

the 

subject 

matter

 

disclosed 

herein 

are 

proprietary 

items 

to

 

which 

Watkins-Johnson 

Company 

retains 

the

 

exclusive  right  of  dissemination,  reproduction,

 

manufacture and sale.

 

 

This  document  is  provided  to  the  individual  or 
using  organization  for  their  use  alone  in  the 
direct  support  of  the  associated  equipment 
unless  permission  for  further  disclosure  is 
expressly granted in writing. 

  

WATKINS-JOHNSON COMPANY 

         700 QUINCE ORCHARD ROAD 
   GAITHERSBURG  MARYLAND 20878   

 

 

 
 
 
 
 
 
 
 
 
 

                                                 INSTRUCTION  SUPPLEMENT 
 
                                                                       FOR 
 
                                                 WJ-8718A AND WJ-8718A/MFP 
 
                                                    1-Hz  READOUT  OPTION 
 
 
                                                      (TENTATIVE MANUAL)

Содержание WJ-8718A

Страница 1: ...nd sale This document is provided to the individual or using organization for their use alone in the direct support of the associated equipment unless permission for further disclosure is expressly gr...

Страница 2: ...ing and unmodified WJ 8718A and WJ 8718A MFP receivers including this rare option The author is Paolo Viappiani of La Spezia Italy pviappiani tin it a radio collector whose only purpose is to share te...

Страница 3: ...MFP P1 16 pin from J2 MFP P2 14 pin from J1 Disconnect also the MFP P6 plug from the J1 socket on the Front Panel Encoder card A1 796056 X unplug that board from the Front Panel Interconnect small mo...

Страница 4: ...6 that connects J7 to J9 both placed on the aluminium chassis sides unscrewing its P10 and P9 connectors Set the bridge apart for possible future use f Install the following coaxial leads 1Hz W1 from...

Страница 5: ...5 Figure 1a A6 I O mainboard of a WJ 8718A 1 Hz resolution receiver bottom side Figure 1b Further details of the same WJ 8718A receiver A6 I O MB bottom side...

Страница 6: ...re 2 A6 I O mainboard of a WJ 8718A MFP 1 Hz resolution receiver bottom side Figure 3 Factory installed wire wrap wiring for the 1 Hz Option in a WJ 8718A MFP radio A6 I O mainboard partial view botto...

Страница 7: ...replacing with the 796014 type see Figures 4a 4b b Place the new manual front panel with an 8 digit frequency display and also with a 4 section BFO thumbwheel switch eventually in the front of the re...

Страница 8: ...tion too see Figures 5 and 6 for some more card details b Place the new MFP front panel with an 8 digit frequency display in the front of the receiver taking care not to damage the power switch shaft...

Страница 9: ...d suitable for the 1 Hz Option notice the presence of U17 normally missing and of two EPROMS U1 and U2 that include the 1 Hz software front and rear views Figure 5c Details of U17 connections wire bri...

Страница 10: ...tep 3 above e Replace the top and bottom covers using the same screws removed in step 2 above f Apply power to the receiver and check it for proper operation NOTES Figures 7 a and b show the front and...

Страница 11: ...11 Figure 7a The 796022 1 Hz Option card for the WJ 8718 Series of receivers front side...

Страница 12: ...12 Figure 7b The rear shielded side of the same 796022 1 Hz Option card...

Страница 13: ...mixer input corresponds to J7 P10 on W6 Installing the 1 Hz Option implies that the coaxial bridge W6 is removed and that the 3rd L O signal is applied to pin 3 of the X9 socket that corresponds to th...

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