Setting Transition
Modes
8112A PULSE GENERATOR 50MHz
HEWLETT·PACIWID
Fixed
CD
Linear
Gaussian
0
4-1 O Operating
Figure
4-7.
Transition Controls
The transition mode keys enable the operator to select the type of
pulse transition and to vary transition time.
This key provides a fixed transition of 4.5 ns. You cannot adjust the
LEE or TRE parameters when this key is operated (lit).
Permits both the leading and trailing edges of the HP 8 1 12A output
pulse to be programmed independently of each other, in the range
6.5 ns to 95 ms, by setting values for LEE and TRE. Maximum
permissible ratio is 1 :20.
This key is the same
as
the linear mode key except that edges are
co-sinusoidal in shape. It is important to note that the actual rise
and fall times of the transitions will be up to 253 faster than the
selected and displayed value for slopes of greater than 50 ns duration.
For slopes less than 50 ns, transition times tend increasingly towards
the displayed value.
The reason for this variation is that selected values are based only
upon times between 103 and 903 of total trigonometric transition.
Values between 0 to 103 and 903 to 1003 are not taken into
account by the HP 8 1 12A instrument.
Summary of Contents for 8112A
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Page 295: ...MP MP3 MP MP2 MP4 MPS MP 1 2 MPS MP MP I B ElElElEl Replaceable Parts A 3 ...
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