Canberra 2015A, User Manual

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3. Connect the ATTEN OUTPUT of the 1407 to the 2015A INPUT.
4.
Set the 1407 PULSER FALL TIME to 50
µ
s, RISE TIME to MIN, ATTEN
to X10, and the LINE/OFF/90 Hz switch to 90 Hz.
5. Adjust the 1407 PULSE HEIGHT until the AMP OUTPUT on the 2015A
attains an amplitude of approximately 9 volts.
6. Set the LOWER LEVEL (E) discriminator to 1.0 volts and the WINDOW
(
∆
E) discriminator to 10.0 volts.
Outputs
1. Connect the SCA OUTPUT to the scope with RG-58 coax. You should
observe a positive logic pulse with the following parameters:
Amplitude 4.5 to 5.5 volts
Width 350 to 650 nsec
Rise/Fall Time 25 nsec Max.
2. Place the DISC A jumper plug in the ULD position; the DISC (ULD)
OUTPUT should disappear.
3.
Set the rear panel
∆
E RANGE switch to 1V; the DISC (ULD) OUTPUT
should reappear.
4. Return the RANGE to 10 V.
5. The front panel LOWER LEVEL indicator should be dimly illuminated.
Timing Walk Test
1.
Set the
∆
E RANGE switch to 10 V, LOWER LEVEL (E) discriminator to
0.10 volts and the WINDOW (
∆
E) to 10.0 volts.
2. Adjust the Model 1407 PULSE HEIGHT until the AMP OUTPUT attains an
amplitude of 10.0 volts (or maximum with an SCA OUTPUT).
3. Observe the SCA OUTPUT leading edge on the scope. Increase the 1407
ATTENUATION by X50 and measure the leading edge walk. It should be
50 nsec maximum.
28
Performance Check