Tektronix 2246 Operator's Manual page 10

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B r e s s u m a d F r e e m n i d ; e n a n e
Specification—2246 Operators
Performance Requirements
A AND B TRIGGER
Sensitivity—-CH 1 through CH 4: AUTO LEVEL,
NORM, AND SINGLE SEQUENCE
DC
wave trigger signal amplitude required to show the test signal with
horizontal jitter of less than 3.0% of one period (p-p viewed over
two seconds).
0.35 division from DC to 25 MHz, increasing to 1.0 division at
150 MHz.
NOISE REJECT 1.4 division from DC to 50 MHz; increasing to 2.2 division at
100 MHz. 0.5 division or less will not trigger.
HF REJECT 0.35 division from DC to 50 kHz; attenuates signals above the
upper —3 dB cutoff frequency of 70 kHz.
LF REJECT 0.35 division from 100 kHz to 25 MHz, increasing to 1.0 division
at 150 MHz; attenuates signals below the lower —3 dB cutoff fre-
AC 0.35 division from 50 Hz to 25 MHz, increasing to 1.0 division at
150 MHz; attenuates signais below the lower —3 dB cutoff fre-
quency of 20 Hz.
TV LINE, TV FIELD 0.5 division of composite sync will achieve a stable display.
AUTO LEVEL Lowest Usable Frequency 10 Hz.
LEVEL Control Range
#20 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
combined 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
+(0.3% of reading + 10% of one vertical division).
HOLDOFF Contro! Range
Increases A Sweep holdoff time by at least a factor of 10.
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