BNC 6040 - Manual (Page 58)

58
MAINTENANCE AND CALIBRATION
1 ns Delay
Connect the TIC as above. Set the 6040, with the front panel controls, for 30 ns width and 100 ns
delay. Press the Set Reference button on the TIC. Cycle through 100 ns plus 2, 4. 6 and 8 ns delay and
adjust R6 for best compromise of delays. Next cycle through 100 ns plus 2 versus 3 ns, 100 ns plus 4
versus 5 ns, and 100 ns plus 6 versus 7 ns and adjust C1 for the best 1 ns change compromise.
Width Oscillator
Connect the TIC as follows: Start input to TRIG OUT and Stop input to PULSE OUT (both inputs
terminated in 50 ohms, the Start slope to + and the Stop slope to -). Set the TIM for 100 samples and
adjust trigger levels for best triggering (set attenuation to X1 for Start and X10 for Stop). Set the 6040,
with front panel controls, for a delay of zero and a width of 30 ns. Press the Set Reference button and
reset the width to 10 ms. Adjust R25 for a 10 ms reading on the TIC.
1 ns Width
Connect the TIC as in the Width Oscillator procedure. Set the 6040, with front panel controls, for zero
delay and 100 ns width. Press the Set Reference button. Cycle through 100 ns plus 2, 4, 6 and 8 ns
widths and adjust R11 for the best compromise of delays. Next cycle through 100 ns plus 2 versus 3
ns, 100 ns plus 4 versus 5 ns, and 100 ns plus 6 versus 7 ns and adjust C2 for the best 1 ns change
compromise.
10 ns Width
Connect the scope to PULSE OUT and trigger the scope with the TRIG OUT of the 6040. Set the delay
and width to zero, using the front panel controls. Adjust C3 for a half amplitude pulse. Reset the width
to 10 ns and readjust C3, if necessary, to obtain a 10 ns pulse width.