HP 70000 series, Руководство пользователя

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STORE THRU->B
(store reference , through) is used in the normalization process for transmission measurements .
Normalization improves measurements by allowing system errors such as frequency response
and cable losses to be subtracted out.
Be sure that Trace A contains one complete sweep of measurement data for the through-
reference before executing the
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STORE THRU->B softkey . Press
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STORE THRU->B to place the
data from Trace A (presumably a through-trace) into Trace B . Function executed appears
on the display . If the frequency span or the start and stop frequencies are changed after
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STORE THRU->B is executed, Trace B no longer contains a valid through-reference for the
measurement conditions . A new through-calibration trace must be obtained and stored using
the new frequency settings . (The reference level, reference level position, and vertical log
scale can be changed and the trace will remain valid.)
Storing the through-connection saves correction factors that can later be subtracted out. This is
sometimes referred to as \calibrating" the instrument setup .
Consider the following operating hints when using the
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STORE THRU->B softkey .
Pressing
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STORE THRU->B erases any data previously stored in Trace B .
If
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STORE THRU->B is pressed when
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A 0B->A On Off is ON, the Not stored; A 0x->A on
error message appears . The through-calibration trace is not stored.
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A 0B->A On Off must be
in the OFF position.
Functional Type:
tracking generator
Firmkey A ccess:
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State
Preset State:
O (for tracking generator)
4-160 Softkey Descriptions