Recording, Learning and Storing Facilities 1250 Frequency Response Analyzer
12-4 SH/1250/3
New headings and a measurement now appear automatically whenever any change is
made to the data being output which invalidates the existing column headings, e.g.
changing from a, b to r, θ coordinates. The changes triggering new headings are listed
in Section 12.1.6 below.
Lines 5) and 6) in Fig 12.1 were output when the DISPLAY/PLOTTER menu was altered
by selecting r, θ coordinates instead of a, b coordinates. SINGLE was not pressed.
Lines 7) and 8) appeared because the SOURCE was altered from [Ch 2/Ch 1] to [Ch 1]
only (with REFORMAT 'on', see Section 12.1.5). The 'Channel & Range' column
conventions are explained in Section 12.1.7 below.
New headings may be generated at any time, without changing data type, by turning
HEADING 'on', even if it is already 'on', followed by SINGLE or RECYCLE. As usual,
the headings are followed by at least one line of measurements. This facility could be
used at the start of each new page of printer output, for example, for clearer
presentation of results.
With HEADING switched 'off', all headings are suppressed.
12.1.5 REFORMAT
REFORMAT controls the output of both headings and measurements. It affects all data
output ports and devices (Display, RS423, File, GPIB).
With REFORMAT 'on' (the default state), results are output to all selected devices when
any of the changes listed in Section 12.1.6 are made, or if the SINGLE or RECYCLE
keys are pressed. The appearance of headings with these measurements is determined
by the HEADING state, as explained in Section 12.1.4 above.
With REFORMAT 'off', results are output only when SINGLE or RECYCLE are pressed.
This suppression of automatic output after menu changes may be used when the
operator wishes to alter limits or coordinates, for example, and does not want
measurements to be output before the changes have been fully set up. Switching
REFORMAT 'on' again, or pressing SINGLE or RECYCLE, causes results to be output
(with headings if HEADING is also 'on').
The following table summarises what output is produced with all combinations of
HEADING and REFORMAT states, when one of the menu changes listed in Section
12.1.6 is made.
Note: After SINGLE or RECYCLE, or REFORMAT 'on', a result without headings is
output in all cases (apart from the initial set of headings and results output by the 1250).
DATA OUTPUT MENU CHANGE
HEADING REFORMAT to make existing headings:
INVALID STILL VALID
ON ON heading & result result
ON OFF NIL
until SINGLE or RECYCLE, or
REFORMAT 'on', then:
heading & result result
OFF ON result result
OFF OFF NIL NIL
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