Tascam Powered Mixer Av-452 Installation And Support Guide

4 – Remote control unit features
 TASCAM AV-452 Installation & Support Guide 11
9[DVD keys] Use these programmable keys to 
control a DVD player.
A ICOM key This key duplicates the function of 
the 
INTERCOM key on the AV-452 (G).
B CASCADE IN key This key duplicates the 
functions of the 
CASCADE key on the AV-452 (F).
C AV DIM key This key duplicates the func-
tions of the AV 
DIM key on the AV-452 (6).
D LEARN key Use this key when learning the 
commands for other units (see below).
E VOL + and –...

12 TASCAM AV-452 Installation & Support Guide
5 – Rear panel connections
This section provides detail ed information on the rear 
panel connectors, as well as  some notes on installa-
tion and connection of other units. Basic specifications and performance figures are pro-
vided later in the manual.
Video connections
All video connections on the AV-452 switch in paral-
lel.  There is no conversion between composite and 
S-Video signals.  In some designs, you may need to 
connect both video format
s to...

5 – Rear panel connections
 TASCAM AV-452 Installation & Support Guide 13
AV audio and microphone connections
NOTE
The AV-452 is supplied with  several sets of shorting 
plugs for the unused RCA input connectors. Remove 
these when making connection s to these terminals, and 
leave them in place when these terminals are unused. 
This will help to improve the audio performance of the 
system.
In addition to th e connections listed here, there is 
also a pair of 
AUX audio inputs Don the front panel....

5 – Rear panel connections
14 TASCAM AV-452 Installation & Support Guide
“Master” audio connections
These connections relate to  the audio functions of the 
AV-452 which play a “maste r” role in the setup and 
operation of the unit. 
W CASCADE INPUT connectors These 
balanced XLR connectors accept balanced signals 
from another AV-452 (or si milar unit). These input 
signals are selected using the front panel 
CASCADE 
key 
F and are pre-ROOM VOLUME.
Depending on the position of the rear panel DIP...

5 – Rear panel connections
 TASCAM AV-452 Installation & Support Guide 15
Note the following levels and input impedances, cor-
responding to the different  connectors on the barrier 
strip:
The level of the intercom si gnal is set as explained 
below, and a squelch circuit is also available 
d. The 
intercom signal is enable d and disabled using the 
front panel 
INTERCOM key G.
c AV DUCKER RATIO and THRESH 
controls 
These trimmer pots are used if the AV 
ducking facility is enable d using the DIP...

16 TASCAM AV-452 Installation & Support Guide
6 – Customization and settings
The customization and settin gs of the AV-452 are 
made using a set of six DIP switches. These switches are as follows:
These are explained here:
LEARN IR (switch 1)
This function allows the AV-452 to learn the IR codes 
for direct control of a monitor, video projector, etc. 
allowing the external video source for the video dis-
play unit to be selected using the AV selection keys 
as well as the 
RGB 1 and RGB 2 keys.
This...

6 – Customization and settings
 TASCAM AV-452 Installation & Support Guide 17
CASCADE (switch 2)
This switch determines the  use of the audio signals 
received at the 
CASCADE IN connectors W when 
the 
CASCADE key F is activated.
In the 
EXC (exclusive) setting, the input cascade 
signal replaces the direct input signals at both the 
LINE OUTPUT Xand SPEAKER OUT Z terminals.
In the 
SUM setting, the cascaded signal is summed 
(pre 
ROOM LEVEL) with the direct input signals 
from the 
LINE OUTPUT Xand...

18 TASCAM AV-452 Installation & Support Guide
7 – External control
The AV-452 can be controlled from other units in two 
ways.
The first is a serial protocol, as used by many AV 
controller vendors. This allows a number of AV-452  units to be controlled from a personal computer, as 
well as by these dedicated controllers.
The second is by using the 
relay connector, allowing 
a number of external relay controls and tally indica-
tors to be connec ted to the AV-452. 
AV-452 serial protocol
NOTE
A...

7 – External control
 TASCAM AV-452 Installation & Support Guide 19
IR “blaster”
Note that pin 21 (and pin 2, +5V) may be connected 
to an IR “blaster” device, which can be used to relay 
command codes from the AV-4 52 to an external mon-
itor or projector, etc.
The procedure for learning these command signals is 
described in LEARN IR (switch 1) on page 16. An IR blaster that has been
 found to work well with 
the AV-452 is th e Xantech 283M IR emitter. Please 
consult your TASCAM distributor for...

20 TASCAM AV-452 Installation & Support Guide
8 – Specifications and block diagram
Video specifications
Composite inputs All composite inputs are 
through RCA jacks.
S-Video inputs All S-Video inputs are through 4-
pin mini-DIN connectors.
Composite outputs All composite outputs are 
through RCA jacks.
S-Video outputs All S-Video outputs are 
through 4-pin mini-DIN connectors.
RGB 2 connections 
AV audio and microphone specifications
AV audio inputs All inputs are made through 
RCA pin jacks...