Canberra 2015A, Руководство пользователя

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4. Move the MODE jumper to the SCA position. Adjust the 1407 PULSE
HEIGHT for a 2015A AMP OUTPUT of 10 volts. Vary the LOWER
LEVEL (E) discriminator; the SCA OUTPUT pulse will move in time as a
function of the LOWER LEVEL (E) discriminator; i.e., the SCA is no longer
a timing SCA. Set the MODE jumper plug back to the TSCA position.
External Lower Level Check
1. Place the LLD jumper plug in the EXTernal position and the DISC B jumper
in the IN position.
2. With a jumper wire, connect the +5 volt supply to the rear panel Disc BNC.
3. Adjust the 1407 PULSE HEIGHT for a flickering SCA OUTPUT
4. Measure the AMP OUTPUT amplitude, it should be 4.5 to 5.5 volts.
Normal Internal Control Settings
Verify that the shaping switch and all jumper plugs are in the desired position before
replacing the side covers. The following listing is a guide to the usual positions of the
jumpers (see Figure 4):
Zout 0
LLD INT
SCA MODE TSCA
DISC A LLD
DISC B OUT
SHAPING 2
µ
s
29
SCA Operational Checks