Bradley 233 - Input and Delay Functions

Turn offset to max and record the voltage checking that it is between -0. TV and -0.3V. Re
peat for output 2.
Set both outputs to 5V amplitude, zero offset, normal positive.
Check that when the sum button is pressed the voltage at output 2 rises from +5V to +10V
approximately.
5.5.3 Pre-pulse
Select single cycle. Record the d. c. voltage at pre-pulse socket.
Limits: zero±0.2V.
5. 5.4 Logic Level ( Boards 200 and 300)
Record the voltage at P35 w.r.t. -12V supply (Anode D30 or adjacent eyelet).
Limits: -1. 9 to -2. 2V.
Select Comp. Record the voltage.
Limits: -0,7to-1.0V.
Repeat for other output.
5.6 INPUT AND DELAY FUNCTIONS (Test Equipment 4, 5, 8)
5. 6.1 External Trigger
Select: +ve slope
Ext Trig.
Relevant output: Square-wave
Norm, +ve
Sum button out
Amp lOV Offset zero
Apply to Ext input 8V p-p sinewave of 0. 5MHz and observe output on oscilloscope.
Turn level control anti-clockwise and check that duty cycle of output increases to 100%.
Turn level control clockwise and check that duty cycle of output decreases to 0%.
Check that IWg'd lamp is lit except when the duty cycle is 0 or 100%.
(If 100% is not achieved, increase R103. If 0% is not achieved reduce R103).
Select -ve slope and check that Pulse Generator still triggers.
Apply 0. 4V p-p at 50MHz.
Check that a 50MHz output signal free of sub-harmonics can be obtained with a suitable set
ting of the level control.
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