Canberra 2015A, Руководство пользователя

Страница: 25 / 56

The Figure 16 shows the same pulses with a source mismatch caused by driving the
cables with the transistor switches directly. The waveforms indicate how important
and effective source matching is in eliminating instabilities which cause phenomena
such as multiple counting or triggering. For this reason the Model 2015A provides
source matched outputs.
Upper Trace: R
load
= 1k ohms
Lower Trace: R
load
= 50 ohms
Scope:
Horizontal = 0. 1
µ
s/cm
Preventative Maintenance
Preventative maintenance is not required for this unit.
When needed, the front panel of the unit may be cleaned. Remove power from the unit
before cleaning. Use only a soft cloth dampened with warm water and make sure the
unit is fully dry before restoring power. Because of access holes in the NIM wrap, DO
NOT use any liquids to clean the wrap, side or rear panels.
19
Preventative Maintenance
Figure 16 Typical Output Pulse with a
Source Mismatch