IET Labs, Inc. RLC Digibridge 1693, User And Service Manual, Page: 74 / 171

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1693 RLC Digibridge
Operation
3.5.9 Time Required if IEEE-488
Output is Enabled
If data output is enabled, via IEEE-488 bus, additional
time - about 2 ms to 12 ms - is required per measure-
ment. This time requirement depends on the selected
display and what data is being sent out, approximately
as follows. (Refer to explanation of operation with
the IEEE-488 interface, paragraph 3.12.)
Regular Output Data Format CBF*
Output
data:
BIN RLC QDR RLC,
QDR
BIN,
RLC
BIN,
QDR
BIN,
RLC,
QDR
(any)
Display =
BIN NO.
2 6 8 10 10 10 12 < 2 ms
Display =
other
2 2 2 4 4 4 6 < 2 ms
* Compacted Binary Format. If the compacted binary
format is selected, data output requires less than 2 ms.
3.5.10 Effect of Selecting a Low Test
Frequency on Measurement
Time
Selection of a test frequency near or below 0.1 kHz
affects measurement time in two ways: both settling
time and data acquisition time depend on the period
of the test signal. (Selection of test frequency near
and above 1 kHz has little effect on measurement
time, particularly if the integration time factor is left
at default or set to a larger value.)
In general, measurement time includes the following
two terms, which are additive. (Note: f is equal to the
test frequency in kHz.)
• Settling time (if measure mode is
TRIGGERED and you have not programmed
any DELAY) is [7 to 12 ms][l/f]. In other
words, approximately 10 periods.
• Data-acquisition time is generally more than
9 periods (15 periods at SLOW Measure rate),
although the relationship is not linear. (Refer to
the summary below and to theory, Chapter 4.)
Notice that you can select a shorter DELAY and you
can select the “quick-acquisition” feature. The latter
saves more than one test-frequency period (with some
reduction in accuracy).
NOTE: If a special function is selected that simplifies
or eliminates data output for PASS results, the addi-
tional time described above is accordingly reduced
or eliminated, except for FAIL results.