Operators Familiarization
INTENSIFY G A TE -W hen a C/T measurement is first called up, this
item is selected by default. When selected, an intensified zone will
appear on the A sweep display of the channel that the C/T is measuring.
The position and width of this intensified zone can be altered in the same
manner as in gated Volts measurements. The C/T will only measure trig
ger edges that occur somewhere inside this zone.
INTENSIFY CTR—When this is selected, the gate signal generated by
the C/T hardware will control the position and width of the intensified
zone, thus providing an unambiguous display of what the C/T is actually
measuring.
The next three menu items allow the selection of a resolution magnifier. Only
one of the three may be selected at a time. All C/T measurements except
FREQ RATIO and TOTALIZE can utilize resolution magnifiers. A C/T
measurement must have been previously selected before a resolution mag
nifier selection will have any effect.
AUTO RESOL—This is the default setting when a C/T measurement is
first called up. The C/T uses a fixed measurement time interval {approxi
mately 320 milliseconds, or 1 period of the trigger signal, whichever is
larger, for single channel measurements; approximately 600 milli
seconds for dual channel measurements). The resolution of the
measurement is then calculated, and as many fully-resolved digits as
possible are displayed.
X I0 RE S O L—When selected, the C/T will make one trial measurement
using the fixed measurement time interval, and calculate and display as
many fully-resolved digits as possible. Based on the results of this
measurement, it is determined whether or not another digit of resolution
is possible. It is possible if:
1.
The number of digits displayed afterthe trial measurement isat least
1 less than the maximum number of digits disptayabie for that
measurement, and:
2.
If PERIOD measurement, the units of the least-significant digit
(LSD) are larger than 100 attoseconds {100 x io - ,8sec), or if any
other time-interval measurement, the units of the LSD are larger
than 1 picosecond ( i o - 1£sec).
If it is not possible, the message NOT POSSIBLE
— >
is displayed to the
left of the X10 RESOL menu label for approximately one second, then the
X10 RESOL label is deselected and the AUTO RESOL label is selected
(underlined), and the measurement proceeds in auto resolution mode.
2252
Operators
3-27
Summary of Contents for 2252
Page 17: ...SECTION 1 INTRODUCTION 2252 Operators ...
Page 18: ......
Page 26: ......
Page 27: ...SECTION 2 CONTROLS CONNECTORS AND INDICATORS 2252 Operators ...
Page 28: ... f ...
Page 55: ...SECTION 3 OPERATORS FAMILIARIZATION 2252 Operators ...
Page 56: ......
Page 107: ...SECTION 4 OPERATOR CHECKS AND ADJUSTMENTS 2252 Operators ...
Page 108: ......