Tektronix 2252, Руководство оператора

Страница: 81 / 114

Operators Familiarization
The following error messages may be displayed for the C/T 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 than 0.01 Hertz
(timeout disabled).
> 100s Period or width of measured signal greater than 100
seconds (timeout disabled).
>999999999
Totalize count greater than 999999999.
FREQ RATIO—Measures the frequencies of the two source channels and
displays their 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, white trying
to measure chy frequency.
No stop trig was detected after timeout, while trying
to measure chy frequency.
CHx <0.01 Hz Frequency of chx signal less than 0.01 Hertz
(timeout disabled).
CHy <0.01 Hz
Frequency of chy signal less than 0.01 Hertz
timeout disabled).
> 99999999 Frequency ratio 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 win 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.
2252 Operators
3-25