Tektronix 2247A

Operators Familiarization
FREQ—Measures the frequency of the selected source channel.
PERIOD—Measures the period of the selected source channel.
WIDTH—Measures the width of the selected source channel.
TOTALIZE—Displays a running count of trigger edges from the
selected source channel.
NOTE
‘The totalize count is reset to zero whenever a front panel
switch/button is moved/pushed.
The following error messages may be displayed for the above
measurements:
Message Reason(s)
“NO B TRIG" No start trig was detected after timeout.
No stop trig was detected after timeout.
“<0.01Hz” Frequency of measured signal less then
0.01 Hertz (timeout disabled).
“>100s" Perlod or width of measured signal greater
then 100 seconds (timeout disabled).
“>999999999”" Totallze count greater than 999999999.
FREQ RATIO—Measures the frequencies of the two source channels and
displays thelr ratio, Possible error messages:
Message Reason(s)
“NO CHx TRIG" No start trig was detected after timeout,
while trying to measure chx frequency.
No stop trig was detected after timeout,
while trying to measure chx frequency.
“NO CHy TRIG” No start trig was detected after timeout,
while trying to measure chy frequency.
No stop trig was detected after timeout,
while trying to measure chy frequency.
3-26 2247A Operators
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