Model 2929 Scaler Technical Manual Section 3
Ludlum Measurements, Inc. Page 3-2 January 2016
Beta-Gamma Vol: a rotary control used to vary the audio output of the
beta-gamma channel from off to full volume.
Alpha Vol: a rotary control used to vary the audio output of the alpha
channel from off to full volume.
Alpha Count: a six-digit LED readout indicating counts received in the
alpha counting channel.
Beta-Gamma Count: a six-digit LED readout indicating counts received in
the beta channel.
Rear Panel
Amp Out: a BNC connector that provides access to the final amplifier stage. The
pulse is positive-going with a maximum amplitude of approximately 22 V.
Alpha Out: a 15-pin D type connector used as a data output for the alpha
counter. (Refer to Section 7 for a listing of pin numbers and their functions.)
Beta-Gamma Out: a 15-pin D type connector used as a data output for the beta-
gamma counter. (Refer to Section 7 for a listing of pin numbers and their
functions.)
Fuse: Use of a 1-Amp, fast-blowing fuse provides protection to the instrument
in case of internal electrical failure.
110 Vac: a connector used to apply line power to the instrument
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