Tektronix 2247A

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Operators Familiarization
“CHx<0.01Hz" Frequency of chx signal less then 0.01
Hertz (timeout disabled) .
“CHy<0.01Hz" Frequency of chy signal less then 0.01
Hertz (timeout disabled).
“>99999999" Frequency ratlo greater than 99999999.
(TO GATED MEASMT MENU)—Causes (CTR/TIMER PG 2) menu to
appear.
Gated C/T Measurement Menu Page 2
When the (CTR/TIMER PG 2) menu Is up, selecting a measurement will
start the measurement, but leave the menu up. The selected measurement
item Is underlined.
GATED FREQ—Measures the frequency of that portion of the
selected source channel that appears inside the Intensified zone.
GATED PERIOD—Measures the perlod of that portion of the selected
source Channel that appears inside the Intensified zone.
GATED WIDTH—Measures the width of that portion of the selected
source channel that appears inside the intensified zone.
GATED EVENTS—Displays an averaged count of the number of trig-
ger edges from the source channel that occur Inside the Intensified
zone.
These error messages are possible for gated measurements, In addition to
those shown above for the nongated versions:
Message Reason(s)
“NO A TRIG” No A sweep was detected after timeout,
In gated measurements.
“>999999999" Gated event count greater than 999999999.
(TO C/T CONTROL MENU)—Causes (C/T CONTROL) menu to
appear.
2247A Operators 3-27