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AM-10HD / Aug 2008
A M - 1 0 H D G U I
VBMS Frequency
The VBMS’s frequency of operation is adjustable from 60Hz to 300Hz,
with program energy passing through the VBMS algorithm time aligned for
phase coincidence with the non‑VBMS path regardless of the VBMS Fre
‑
quency setting.
In general, lower frequency settings produce a “heavier” sound, while
higher settings result in less coloration while still favorably controlling bass
energy excursions. This control should always be adjusted to personal taste
and program format.
Emphasis Selection
Pre‑emphasis is selectable as NRSC, or Flat (OFF) as shown in
the graphic on the right:
When pre‑emphasis is enabled it may be placed in one of three
locations in the signal chain:
Pre‑MBLim – In this position, the selected pre‑emphasis is
placed
before
the 10‑band limiter/clipper section. In this mode
the 10‑band section may be operated as a frequency conscious
limiter tailored to the inverse of the selected pre‑emphasis.
Pre‑Limiter – In this position the pre‑emphasis is
after
the
10‑band section but
before
the Lookahead limiter (if enabled)
and/or main clipper.
Post‑Limiter – In this position the pre‑emphasis is
after
the
10‑band section and Lookahead limiter and
before
the main
clipper.
Entirely different sound textures may be created by placing the
pre‑emphasis in each of the three locations. There is no right or wrong
setting unless that setting does not produce the on air sound desired.
