TOA Electronics U-13R - Unbalanced Line Input Module with High/Low Cut Filters and Mute-Receive for 900 Series (Dual RCA) - Manual (Page 5)

MODULE SELECTION PAGE 3
Module Categories
There are three main module categories -
1.
Mic
2. Line
3. Special Function
Model Numbers
TOA assigns module model numbers using the following
convention:
a-bbc , where "a" indicates the module
"Series", "bb" indicates the module "Function", "c"
indicates the module "Connector Type".
For example, with the M-11S module,
"M" indicates "Microphone" Series
"11" indicates "Mute Receive" Function
"S" indicates "Screw Terminal" Connector.
See the "Module Selection Chart" on page 5 for further
details.
Signal Levels
There are three general categories of signal levels in
audio.
1. Microphone (Mic) Level
• Typically 0.25 mV (-70 dBu) to 2.5 mV (-50 dBu)
• Examples include: microphones, wireless
microphone receivers
2. Line Level
• Typically from 100 mV (-18 dBu) to 7.75 V (+20 dBu)
• Examples include: AM/FM tuners, CD players,
cassette decks, computer sound cards, jukeboxes,
satellite receivers, signal processors, telephone page
outputs, wireless microphone receivers
3. Speaker Level
• Typically higher than 7.75 V (+20 dBu)
• Amplifier output for driving speakers
• TOA does not currently offer modules to accept
Speaker Level signals (external pad required).
M-11S
Module Series
Module Function
Module Connector Type
MODULE SELECTION
Notes:
• Connecting a Mic Level signal to a Line Input
module usually results in very low, barely
audible, output.
• Connecting a Line Level signal to a Mic Input
module usually results in distorted output.
• NEVER connect a Speaker Level signal to a Mic
or Line Input module - this will damage the
module.
• The type of module connector does not
necessarily indicate the input sensitivity. For
example, there are both Mic and Line Input
modules available with female XLR jacks.
Installation Notes
• Always turn the power OFF on the host unit
before installing or removing modules.
• Before installing each module, check the
supplied module installation sheet to determine
if any configuration is required. See Jumper
Settings on page 35 for a list of possible
configurations.
• Always secure each module to the host unit's
chassis with the supplied screws.