— 20 —
shows the JUSTIN 808 slowly correcting the error at the default
rate of 50 samples per second. Implications of faster correc-
tion rates were mentioned in the Quick-Start Setup section, and
are discussed in greater detail later.
Additional options and information are available on the
FM/HD
Measurements
menu shown below.
The measured and applied delays are shown both in the num-
ber of samples and in milliseconds. The Status box confirms
any offset and makes note of whether the HD1 leads or lags the
analog FM.
Delay History
Scrolling down this menu reveals the
Delay
History
plot. This screen shows 10 minutes
of history, both the measured and applied
delays. The upper plot showing measured
delay is further broken down into the yellow
Inst.
(instantaneous) measurement and the
integrated blue
Ave.
(averaged) value.
Inst.
represents fluctuations in the measure delay
as quickly as the autocorrelation algorithm can calculate them,
which with moderate and typical wanderings is pretty darned
snappy. The time-averaged
Ave.
value is the basis for the ap-
plied delay, which will eventually bring the measured delay
back to zero.
Содержание JUSTIN 808
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