Metric Halo SpectraFoo - Manual (Page 19)

Instruments
19
• Delay Finder: This instrument is used to measure the delay between the two analyzer channels used by
the Transfer Function. It does this by computing the impulse response of the linear transfer function that
relates the response channel to the source channel. After computing the impulse response, the delay
finder automatically compensates for the delay by inserting additional delay internally on the source
channel so that both channels line up. You can use the delay finder tool to choose a different alignment
delay.
• THD Meter: This instrument provides S/N and THD measurements.
These instruments are discussed in detail on the following pages. This instrument reference section details the
appearance and function of the instruments, as well as the controllable parameters that you can use to adjust
the functions of the instruments.
Level Meter
Overview
This instrument provides a highly configurable two-channel, three–in–one digital level meter. Like all Spec-
traFoo instruments, the level meters are resizable. If you make the meter wider than it is tall, it will use a
horizontal orientation.
Figure 3.1: Level Meter Horizontal Orientation
If you make it taller than it is wide, the meter will use a vertical orientation.
Figure 3.2: Level Meter Vertical Orientation
SpectraFoo’s Level Meters allow you to switch on the fly between modern, fast tracking, sample accurate
digital ballistics and traditional standards–based PPM ballistics. Many engineers are used to working with PPM
standard hardware level meters and SpectraFoo can emulate standard PPM ballistics, but it can also do much
more. The ballistics for both the Peak crawlback and VU level is fully configurable.
The meter can show you the Peak, RMS and VU levels along with holds for Peak and RMS simultaneously.
The meter also has two available color modes:
• The Level based color mode colors the meter bars based upon the the level of the signal. The color
breakpoints are user configurable and can be adjusted to provide smooth transitions or hard edges. This
mode is the standard configuration for the meters, and is required to implement the K-System calibrated
meters.