Canberra 2015A, Руководство пользователя

Страница: 22 / 56

COARSE GAIN: 16
FINE GAIN: 2.2
INPUT POLARITY: (+) Pos
LOWER LEVEL (E): 5.00
WINDOW ( E): 1.00
∆
E RANGE 10 V
4. Set thp internal jumpers as indicated below:
Disc A LLD
Disc B OUT
Mode TSCA
LLD INT
5. Set the 1407 pulser output polarity to POS. Adjust the 1407 pulser PULSE
HEIGHT until the 2015A AMP OUTPUT attains an amplitude of 4 volts.
6. Adjust the 2015A pole/zero as outlined in “Performance Adjustments” on
page 8.
7. Slowly increase the pulser PULSE HEIGHT until the 2015A SCA OUTPUT
is just observed. Measure the AMP OUTPUT visually on the oscilloscope or
on a calibrated multichannel analyzer and compare with the LOWER
LEVEL (E) setting. The AMP OUTPUT signal should have an amplitude of
5.0
±
0.1 volts.
8. Increase the 1407 PULSE HEIGHT until the 2015A SCA OUTPUT just
begins to disappear. Again measure the AMP OUTPUT visually on the
oscilloscope or on a calibrated multichannel analyzer. The AMP OUTPUT
signal should have an amplitude of 6.0
±
0.1 volts.
9.
Very the LOWER LEVEL (E) and WINDOW (
∆
E) settings and repeat steps
7 and 8; a plot of the AMP OUTPUT versus LOWER LEVEL (E) or
WINDOW (
∆
E) settings will give the linearity curves, which should be
within
±
0.25% of full scale or
±
25 mV.
10. Connect channel 2 of the oscilloscope to the rear panel DISC output. When
the AMP OUTPUT signal on channel 1 of the oscilloscope, exceeds the
LOWER LEVEL (E) discriminator setting a positive logic pulse will appear.
11. Change the DISC A jumper plug to the ULD position. Monitor the rear panel
DISC output with channel 2 of the oscilloscope. When the AMP OUTPUT
16
Operating Instructions