Enabling Input Signal Meters - Polycom SoundStructure C16 Design Manual

Enabling Input Signal Meters

All input signals have meters that display the signal activity. The meters are enabled from the Tools menu
or from the lower right hand corner of the screen.
To enable the signal meters from the Tools menu:
1 Select Tools > Options.
2 Choose the meters entry and select Enable Meters.
You can also enable meters by right clicking on the lower right hand corner of the screen and select
the desired meter state. Both options are shown in the following figure.
Enabling meters is a function of SoundStructure Studio and not the particular configuration file. This means
that when you enable meters, the meters are enabled for all projects that SoundStructure Studio opens from
then on.
After you enable meters and navigate to a page that displays the meter activity (such as the Channels page),
the desired signal meters are automatically registered by SoundStructure Studio and the meter data is sent
from the SoundStructure device to SoundStructure Studio. Navigating away from a page with meter
information causes the meters unregister and any new meters on the new page are registered.
SoundStructure Studio uses the mtrreg and mtrunreg commands to automatically register and unregister
meters, respectively
You can view meter information either over RS-232 or Ethernet connections to the SoundStructure device;
however, the meters are most responsive over a Ethernet connection. If meters are viewed over the RS-232
interface, Polycom recommends that you use the highest data rate of 115,200 baud to minimize any lag
between registering for meters and having the meter information displayed on the screen.
Understanding Meter Types
There are typically two types for meters that are available for each input channel - a level that is before any
processing known as a level_pre and a level that is after any input processing known as level_post.
The level_pre meter always displays the signal level just after the A/D converter. This meter shows the
effect of the analog signal gain before any digital processing takes place, as shown in the following figure.
Polycom, Inc. 92