TEST 10
    The circuit is now set up and programmed. The stimulus applied
    at the I/P is an interrogation A5-5 which is what was programmed
    into the chip on test 9. The Scope is connected to the O/P burst
    and the ANT unit is tuned to listen for TZ5. If the flag in the 
    ANT is set to show that a reply has been received the delay is
    read from the ANT and converted to a turn around value and displayed
    if the flag is not set a suitable message is displayed.
        The turn around should be adjusted to 300.55ms as near as 
    possible. There will be jitter on the last digit of at least ±0.02ms
	Having set the turn around delay the program executes a series
    of acceptance tests which are logged by the computer.


Faultfinding:
No O/P - look on TP10 this gives timing pulses and is a window on
         what is going on in the micro. It should look like this:
       ────┬┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬─┬──┬
           ││ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │  │
    address 1 2 3 4 5 6 7 8 9   11  13  15  17  19  21  23 Reply

 If it looks like this: Then EEPROM U7 is not programmed   
       ────┬┬─┬─┬─┬─┐
           ││ │ │ │ │______________________________________
   
    address 1 2 3 4 5 6 7 8 9   11  13  15  17  19  21  23

Return to test 9
       U7 Pin 8 is the switched supply pin. This should go high for programming
          Pin 6 clock pulses
          Pin 5 data pulses


