E1430 Multi-Module SCPI code (fwd)

Date: Mon, 28 Nov 94 19:00:58 PST

Author:  Dave Tripp







SCPI commands to control and sync up two E1430As:





Master  E1430A:



    1. DIAG:REG 36,3  (Sets  MULTI-SYNC ON, MASTER-CLOCK ON, ADC-CLOCK INT

                       and DSP-CLOCK to ADC-CLOCK)

    2. TRIG:SOUR EXT  (Sets the master E1430 to receive its trigger source

                       from the Front Panel External Trigger BNC Connector)





Slave  E1430As:



    1. DIAG:REG 36,5  (Sets  MULTI-SYNC ON, MASTER-CLOCK OFF, ADC-CLOCK EXT

                       and DSP-CLOCK to ADC-CLOCK)

    2. TRIG:SOUR EXT  (Sets the SLAVE E1430 to receive its trigger source

                       from the Front Panel External Trigger BNC Connector)



                      (This allows the External Trigger Signal to be

                       applied to either the MASTER or SLAVE which will

                       Trigger both modules at the same time)





Diagram of Clock and Timing Circuits:





                Internal 

                External     ____________________

External        Switch       | Internal Crystal |

Clock >---------\  ----------< Oscillator       |          

                 |           |_________________v|

                 | IN                          |

           ______v_______                      |

           | Clk        |                      |

           | Generation |                      |

           | Circuit    |                      |

           |            |                      |

           |_____v______|                      |

                 | OUT        Master           |

                 |            Switch           |

                 |____________/ _______________|____>>>>>_______ VXI Backplane

                 |                             |               |

   MULTI-SYNC      ____________________________|____<<<<<______|

   Switch        \                             |            

                 |                             |

                 |____________________________    DSP-CLK

                 |                             \  Switch

           ______v_______                ______|______

           |            |                |           |

           |    ADC     |                |   DSP     |    

           |    CLK     |                |   CLK     |

           |            |                |           |

           |____________|                |___________|









To start the measurement you must issue the following register commands in

the order listed:



Slave:

   DIAG:REG 10,3 (Forces the SLAVE E1430 into the IDLE state, then transitions

                  to normal operation and waits for a SYNC pulse)



Master:

   DIAG:REG 10,7 ( Sets MASTER E1430 into the IDLE state, then transitions 

                   to normal operation and then pulls the SYNC LINE. This

                   moves both MASTER and SLAVE to the ARM state)



Master:

   DIAG:REG 10,2 ( Pulls the SYNC line on the MASTER E1430 which in turn

                   pulls the SYNC line on the SLAVE E1430 and moves both

                   modules into the TRIGGER state. If trigger is set to

                   AUTO then both modules immediately move to the 

                   MEASUREMENT state)



Let me know if I can be of further assistance.



Dave Tripp



===========================================================================

Dave Tripp - Sales Development Engineer         Hewlett Packard Company

Phone: (206) 335-2288                           Lake Stevens Instrument Div

FAX:   (206) 335-2828 or 335-2442               8600 Soper Hill Road 

===========================================================================



