Table of Contents
Advertisement
12.6.9. 48: Weighted Frequency Response L
As Special Parameter 47, but operating on the lower trace, see Section 12.5.19.
12.6.10. 50: Y -range 2,5/5,0 dB
If set to 1, then Special Parameter 50 sets the Y -axis range to 2,5 dB in a dual trace
format or single trace format with the MEASUREMENT SETUP, or to 5 dB in single
trace full format display.
12.6.11. 60: Lifter Taper
Special Parameter 60 defines the width in number of Cepstral elements of a half-
cosine taper which is added to a Shortpass or Longpass Lifter.
12.6.12. 70: Graph Update
Setting Special Parameter 70 to 1 ensures that two instantaneous functions displayed
in dual trace format are always calculated and displayed from the same set of records.
Use of Special Parameters 70 can cause reduced real-time frequency range.
12.6.13. 71: Function Blank
Where functions involving division are displayed, those parts of the function which
could contain inaccuracies due to a divisor which is zero or below a certain limit are
blanked. This limit can be increased or decreased with a positive or negative offset
defined by entering an appropriate value in Special Parameter 71.
12.6.14. 72: Correlation Blank
When the Bow-tie correction is used in display of auto or cross correlation, a default
limit is defined beyond which large inaccuracies can occur due to the application of
the Bow-tie correction being division by a very small number. When n
~
t is greater
than the default limit the correlation function is blanked. This limit can be increased or
decreased with a positive or negative offset defined by entering an appropriate value
in Special Parameter 72.
12.6.15. 73: Phase Blank
Those parts of phase curves which are inaccurate due to low values of both the real
and the imaginary part are blanked. The limit at which blanking begins can be in-
creased or decreased with a positive or negative offset defined by entering an appro-
priate value in Special Parameter 73.
139
Advertisement
Table of Contents
