Tektronix 2245A, Руководство оператора

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Performance Characteristics
Table 6-1 (cont)
CHARACTERISTICS
PERFORMANCE REQUIREMENTS
LEVEL Control Range
+ 10 divisions referred to the appropriate
vertical input.
This range is sufficient to allow triggering
at any point on a displayed waveform for all
modes except “ ADD” . In ADD, the com­
bined range of the two position controls
exceeds the trigger level range, making it
possible (though unlikely) to pull a signal on
screen for display but fail to trigger on it
due to insufficient trigger level range.
TRIGGER LEVEL
READOUT Accuracy
±(0.3% of reading + 10% of one vertical
division).
HOLDOFF Control Range
Increases A Sweep holdoff time by at least
a factor of 10.
FUNCTIONS WITH DIGITAL READOUT
Specifications for functions with digital
readout are valid only when the ambient
temperature is within ±10° C of the
temperature at the time of the last SELF
CAL. For maximum performance, a
recent SELF CAL is recommended.
CURSOR FUNCTIONS
TIME (manually
positioned cursors)
Accuracy ±(0.5% of reading + 2% of the SEC/DIV
setting).
1/TIME (manually
positioned cursors)
Accuracy Readout calculated from TIME cursor
positions.
CURSOR VOLTS (man­
ually positioned cursors)
Accuracy
±(1.0% of reading + 2% of one vertical
division + high-frequency display errors).
6-8 2245A Operators