Broadcast Tools ACS 4.4 G2 User manual

Installation and Operation Manual
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Manual update: 12/15/2021
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ACS 4.4 G2
Four Input, Quad Output Stereo Audio Matrix Switcher
INC
®

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ACS 4.4 G2 Installation and Operation Manual
Table of Contents
Section Title Page #
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Who to Contact for Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Features/Benefits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Surge Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Power Supply Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
UPS standby power system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Chassis Ground Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installation/Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Front Panel LEDs/Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Audio Mix Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
RS-232 Serial Port (RJ-11 Jack). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Audio Inputs/Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
RJ45 Audio Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Cable Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Audio Input Expansion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Audio Level Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
PIP/Trigger Inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Silence Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Open Collector Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Relay Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Configuration Dip-switch setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Serial Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
RS-232 Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Serial commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Menu Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Front and rear panel drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix
Configuration jumpers and DIP-switch layout . . . . . . . . . . . . . . . . . . . . . Appendix
Fractional schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix
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2
CONTENTS

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ACS 4.4 G2 Installation and Operation Manual
INTRODUCTION
INTRODUCTION
Thank you for your purchase of a Broadcast Tools® ACS 4.4 G2 Four Input, Quad
Output Stereo Audio Matrix Switcher (referred to as the ACS 4.4 G2 throughout this
manual). We are confident that this product will give you many years of dependable
service. This manual is intended to give you all the information needed to install and
operate the Broadcast Tools® ACS 4.4 G2.
SAFETY INFORMATION
Only qualified technical personnel should install the DAC-1. Any attempt to install
this device by a person who is not technically qualified could result in a hazardous
condition to the installer or other personnel or damage to the DAC-1 or other equip-
ment. Please ensure that proper safety precautions have been taken before installing
this device. If you are unfamiliar with this type of equipment, please contact a prop-
erly qualified engineer to handle the installation and setup of the DAC-1. Broadcast
Tools, Inc., is unable to support NON-Broadcast Tools software, hardware or NON-
Broadcast Tools computer/hardware/software problems. If you experience these
problems, please research your hardware/software instruction manuals or contact the
manufacturers technical support department.
WHO TO CONTACT FOR HELP
If you have any questions regarding your product or you need assistance, please con-
tact your distributor from whom you purchased this equipment. If you would like
more information about BROADCAST TOOLS® products, you may reach us at:
Broadcast Tools, Inc.
131 State Street
Sedro-Woolley, WA 98284-1503 USA
Voice: 360.854.9559
Fax: [phone]
Internet Home Page: www.broadcasttools.com
E-mail:[email protected]
THANK YOU FOR CHOOSING
BROADCAST TOOLS® BRAND PRODUCTS!
CAUTION!
Broadcast Tools®
Products, as with any
electronic device, can
fail without warning.
Do not use this product
in applications where a
life threatening condition
could result due to failure.
NOTE:
This manual should be
read thoroughly before
installation and operation.
WEBSITE:
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product updates and
additional information.
Broadcast Tools is a Veteran Owned Business
Designed, Assembled and Supported in WA State, USA

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ACS 4.4 G2 Installation and Operation Manual
DESCRIPTION
Product Description
The Broadcast Tools® ACS 4.4 G2 provides matrix audio switching of 4 stereo
inputs to 4 stereo outputs. Matrix switching allows any/or all inputs to be assigned
to any/or all outputs. The ACS 4.4 G2 may be controlled via its front panel rotary
encoder control knob and TAKE switch, contact closures, open collectors, logic
and/or the multi-drop RS-232 serial port (USB or Ethernet optional). Installation is
simplified with RJ45 audio jacks for input and output connections and plug-in
euroblock screw terminal connectors for expansion and remote control.
Features
• 4x4 balanced analog stereo matrix audio switcher.
• Front panel rotary encoder control knob and separate “TAKE” push button are pro-
vided for input to output channel selection.
• 16 input “PIP” (GPI / Triggers) port (or remote control) with front panel LED
indicator.
• Multi-drop RS-232 serial port (USB and/or Ethernet optional) and ASCII command
set for computer/automation control.
• Three audio switching modes: Interlock, overlap, and mix.
• Internal silence sensors monitor each output and provide front panel LED silence
indicators and silence alarm open collector outputs. Trip level, silence delay and
restore duration timing are user configurable.
• Front panel stereo LED VU meters. (Output one only)
• Stereo headphone output with front panel headphone jack and level control.
(Output one only)
• Configurable power-up selection of inputs to outputs, mute or last source selected.
• Four open collector outputs act as status tally or controllable via serial burst
commands.
• Two SPDT relay outputs with selectable function.
• Front panel multi-turn input level trimmers and internal single turn output level
controls.
• Electronically balanced stereo inputs and outputs with low noise, low distortion
circuitry.
• Most configuration options are via the internal dipswitches.
• Multiple units may be cascaded to expand audio inputs.
• RJ45 audio jacks for audio I/O and plug-in euroblock screw terminals for audio
expansion and remote-control connections.
• Fully RFI proofed.
• Includes PS-1515 +/-15VDC universal desktop power supply (100-240 VAC,
46-63 Hz input) with IEC AC inlet.
• Up to two units may be mounted on the optional RA-1 rack shelf. Desktop and wall
mounting is also possible.
Applications
Broadcast automation audio switcher with trigger inputs, studio source selector,
IP codec source selector, and transmitter site (STL) source selector.
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ACS 4.4 G2 Installation and Operation Manual
INSPECTION
Inspection
Please examine your ACS 4.4 G2 carefully for any damage that may have been sus-
tained during shipping. If any is discovered, please notify the shipper immediately
and retain the packaging for inspection by the shipper. The package contains the
ACS 4.4 G2, a PS-1515/IEC, +/-15 VDC desktop power supply, and a reversed
modular serial cable with the “S9” 9-pin D-Sub adapter. Manuals may be down-
loaded from our web site.
Mounting
The ACS 4.4 G2 is designed to be rack mounted in the optional “RA-1” 19” 1-RU
rack shelf. It should be mounted in an area that is accessible from the rear and prefer-
ably away from sources of heat. We recommend that you bench test and become
familiar with the operation of the unit before permanently installing it.
Power Supply Connection
Insert the universal AC input PS-1515/IEC DC switching power supplies latching 3-
pin connector into the power receptacle on the rear panel of the ACS 4.4 G2. When
ready, plug the power supply into the appropriate AC receptacle. CAUTION!
Only use the power supply provided with this product.
UPS Standby Power System
We recommend that you power your ACS 4.4 G2 from an uninterruptable power
supply (UPS) system. A UPS, like the “BE600M1” from APC, helps minimize the
risk to the ACS 4.4 G2 and provides power during a power outage.
Chassis Ground screw (CHS GND)
The #4-40 sized chassis ground screw should be tied to the station (house) or system
ground.
CAUTION!
Installation of the
ACS 4.4 G2 in high RF
environments should be
performed with care.
Shielded cable is sug-
gested for all control,
audio inputs and out-
puts. All shields
should be tied to the
“GND” terminal on
each channel. The sta-
tion ground should be
connected to the chas-
sis ground screw
(GND) located on the
right side of the chassis
as viewed from the rear.
For lightning protec-
tion devices, check out
www.polyphaser.com
and www.itwlinx.com.
It is recommended
that all cables connect-
ed to the ACS 4.4 G2 be
looped through ferrite
cores to suppress RF.
Surge protection with
RF filtering such as the
Tripp Lite “ISOBAR 4”
is also suggested for the
power supply.

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ACS 4.4 G2 Installation and Operation Manual
OPERATION
Front Panel
The ACS 4.4 G2 utilizes a 1/2-rack aluminum enclosure (8.50” x 7.10” x 1.576”
(WDH). The front panel features one rotary encoder control knob, a take button,
eight input level trimmers, 22 LED indicators, a LED VU meter, a ¼” T/R/S stereo
headphone jack and headphone level control.
The switcher can be configured for the following audio switching modes via dipswitch:
Overlap (default): Overlaps the selected (first) audio input with the audio from
the new audio input while the button for the new source is held down. Both chan-
nels will be fed to the output until the button for the new audio input is released,
at which time the first audio source will be switched off.
Interlock: Connects one input to an output, selecting another input disconnects
all other inputs from that output.
Mix: Multiple inputs may be routed to the output – Push the take button once to
connect, to mute press the take button again.
Front Panel LEDs
Front Panel Operation
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ACS 4.4 G2 Installation and Operation Manual
OPERATION
Rear Panel
The ACS 4.4 G2’s rear panel hosts the audio and remote-control connectors, chassis
ground terminal, multi-drop RS-232 modular connector, and 3-pin universal power
supply connector. Installation is simplified with RJ45 jacks for balanced audio I/O
and plug-in euroblock screw terminals for audio expansion and remote control.
RS-232 Serial Port (RJ-11 Jack)
This RJ-11 jack is used to connect the ACS 4.4 G2 to a computer’s COM port for
RS-232 serial operation using the included reverse modular cable with 9-pin “S9”
female D-sub adapter. If your PC does not have a built-in RS-232 serial port but does
have USB, then a USB-to-serial adapter cable is a good way to add USB serial capa-
bility. We recommend USB-to-serial adapter cables that use the FTDI chipset and
have had good results with the model “SBT-FTDI” from Sabrent.
Audio Inputs
Each of the four stereo inputs are balanced bridging (20K) at a nominal line level
of +4dBu. Input connections should be made to the + and – input pins for balanced
operation, or to the + input pins and grounding the - side for unbalanced input operation.
Front panel multi-turn level trimmers are provided for adjustment of each input channel.
Audio Outputs
The ACS 4.4 G2 provides four balanced low impedance stereo outputs. Output con-
nections should be made to the + and - outputs for balanced operation, or to the +
output and ground for unbalanced output operation. The output levels may be
adjusted with the internal single-turn trimmers. CAUTION: In no case should
either the + or - OUTPUTS be connected to ground.
Connecting the Audio Inputs and Outputs
The input channels are numbered from 1 through 4 on the rear panel. The ACS 4.4
G2 interfaces to external audio equipment through RJ45 jacks using the standard
audio pinout. Follow the RJ45 connection tables below for the desired audio input
and output connections, which appear on the rear of the unit.
RJ45 Audio Input Jacks (J5) RJ45 Audio Output Jacks (J7)
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ACS 4.4 G2 Installation and Operation Manual
OPERATION
RJ45 Audio Jack Pinout:
The input and output RJ45 jacks conform to the RJ45 audio wiring standards. Please
use shielded twisted pair Cat5e or Cat6 cables and connectors (STP).
CAUTION!
Installation of the ACS
4.4 G2 in high RF envi-
ronments should be
performed with care.
The station ground
should be connected to
the designated “Chs
Gnd” ground terminal.
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ACS 4.4 G2 Installation and Operation Manual
INSTALLATION
Installation
Cable Preparation
The terminals block connectors used for input channel expansion and remote-con-
trol connections accommodate wire sizes from 16 - 28 AWG, solid or stranded.
Before installing a wire, remove the euro-block screw terminal plug and turn each
terminal capture screw fully counterclockwise. Strip each conductor to a length of
0.25” and insert the conductor fully into the terminal. Turn the capture screw fully
clockwise to secure the conductor. Verify that no bare/stray wires are exposed.
Input Channel Expansion
Input expansion may be accomplished by using two ACS 4.4 G2 switchers and con-
necting a shielded cable between the first ACS 4.4 G2’s EXT1L unbalanced input
terminal and the second units’ output. The cable shield should be connected to the
ground terminal. Follow the same procedure for the EXT1R channel. The above
example provides 8 inputs, with the first switcher providing the main output.
(Top row, TB-1)
(Bottom row, TB-1)
Audio Input and Output Level Adjustment
Once the input and output connections have been made, the input levels can be
adjusted. The switcher is factory set for unity gain so normally no additional adjust-
ment is necessary. Recommended average input levels would be in the range of 0
dBu to +8 dBu. Should input levels need to be changed, trimmers are accessible
from the front panel. Each stereo input is labeled and has two trimmers, one for the
left channel one for the right channel.
Calibrating audio levels on the switcher:
1 – Remove power from the unit and remove the circuit board from the chassis by
unscrewing the four rear panel screws and sliding the rear panel and circuit
board out of the back of the chassis.
2 –Feed a reference signal into input channel 1. A 2 kHz sine wave test tone at +4
dBu is used at the factory. Connect a Hi-Z dB meter to the TEST jack JP2.
3 – Re-apply power. Adjust the left and right input 1 trimmers to a zero level on
your dB meter.
4 – Disconnect the dB meter from JP2 and connect a balanced stereo input dB
meter to the output. Adjust the output trimmer R68 (Output 1 Left) and R83
(Output 1 Right) for the desired output level. +4 dBu is set at the factory. Make
sure input 1 to output 1 is selected using the front panel controls. Repeat this step
for Output 2 (R97, R112), Output 3 (R128, R141), and Output 4 (R156, R170).
5 – Once input 1 and the four outputs have been calibrated the rest of the inputs maybe
calibrated by routing them to output 1 and adjusting the input level trimmers.
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ACS 4.4 G2 Installation and Operation Manual
OPERATION
PIP / Trigger Inputs
The 16 “PIP” (GPI/Trigger) inputs are used to monitor external contact closures and
pass that information back to the control/automation computer. Response time is set
for 50ms minimum by default but may be configured from 40ms to 2.54 seconds.
The inputs are pulled high to 5 volts through internal 22KΩ resistors and activated
by pulling the input low, to ground. These inputs supply status to any polling serial
device (when the unit ID is set to 0 (ZERO), no polling of inputs is required. Polling
IS required if the unit ID is set above zero).
(Top row, TB-2)
Remote Control Mode (SW2-8 = OFF) PIP Mode (SW2-8 = ON, Default)
Silence Sensors
The each of the four outputs on the ACS 4.4 G2 are monitored by a silence sensor.
The factory default alarm delay is set at 10 seconds, with a threshold of -25 dB,
while the restore time is set at two seconds. Upon silence delay detection, the appro-
priate “SS” led will illuminate and the corresponding (SSx) open collector will go
logic low for the duration of the silence. The sensor may be programmed for:
• Number of seconds of silence (delay) that must be present before an alarm state
is reached or terminated.
• Number of seconds that valid audio (restore) must be present before an alarm
state is cleared.
• Alarm threshold of: -20, -25, -30, -35, or off (disabled).
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ACS 4.4 G2 Installation and Operation Manual
OPERATION
Status Open Collector and Silence Sense Open Collector Outputs
The ACS 4.4 G2 has four open collector status outputs labelled, OC1, OC2, OC3,
and OC4 respectively. The status open collector (OCx) output for the selected chan-
nel will go low providing a return (ground) for an LED indicator, TTL/CMOS logic,
or relay. External pull-up resistors may be required in some installations, voltages
must be limited to 6 VDC at 100 mA maximum.
In addition to the status open collector outputs, four silence sense alarm open col-
lector outputs are also present labelled SS1, SS2, SS3, and SS4 respectively. When
the output silence sensor is enabled, the open collector will go low when silence is
detected and stay low until valid audio returns to the output. External pull-up resis-
tors may be required in some installations, voltages must be limited to 6 VDC at 100
mA maximum.
The open collector outputs are located on pins 1-8 of the bottom TB-2 terminal block
connector.
(Bottom row, TB-2)
Relay Outputs
The ACS 4.4 G2’s two SPDT relay outputs can be used to control external equipment
using contact closures. The relays are controlled by serial commands. Each relay can
be commanded by serial command to: pulse, latch on, or latch off. The relay connec-
tions are located on pins 9-16 of the bottom TB-2 terminal block connector.
(Bottom row, TB-2)
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ACS 4.4 G2 Installation and Operation Manual
OPERATION
Setting Configuration Dip-switches
The ACS 4.4 G2 is equipped with an 8-position configuration dipswitch labelled
SW2. The dipswitch specifies a 2-bit unit ID, serial baud rate, audio modes (mix,
interlock, overlap), and other features listed below. The unit must be removed from
the case to access the Dipswitches. Remove power and any cables from the unit.
Use a Philips screwdriver to remove the screws holding the rear panel, along with
the ground screw. Slide the circuit board assembly out the back of the chassis.
Located the dipswitch labeled SW2. Set the Dipswitches for the desired configura-
tion listed below. When finished, carefully slide the circuit assembly back into the
chassis, reinstall the rear panel with the four panel screws. Follow the configuration
description below.
“OPTIONS” SW2 Dip-switch Functions
Unit ID Address DIP-switches
Baud Rate DIP-switch
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ACS 4.4 G2 Installation and Operation Manual
INSTALLATION
Audio Switch Mode DIP-switches
Open Collector/Relay Mode DIP-switch
Power-up Mode DIP-switch
Remote / “PIP” (Triggers) Mode DIP-switch
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ACS 4.4 G2 Installation and Operation Manual
OPERATION
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Connecting the RS-232 Serial Port
The multi-drop RS-232 transceiver always switches between transmit and receive
mode, unless the unit ID is zero. In that case, the unit will always leave the RS-232
transceiver enabled. Use the provided modular (S9) 9-pin D-sub connector adapter and
reversed modular cord to connect the ACS 4.4 G2’s serial connector to your serial port.
The ACS 4.4 G2 is supplied with a standard reverse modular (RJ11 6p4c) telephone
voice cable and a Broadcast Tools S9, 9-pin female D-sub modular adapter for serial
control. Only use the modular cord that is supplied with the ACS 4.4 G2 or a replace-
ment that reverses (X-over). Connect the cable between the ACS 4.4 G2 and your com-
puter’s COM port or USB adapter cable (optional). The ACS 4.4 G2 may be serially
controlled at baud rates of 9600 or 38400 baud. The unit is shipped set for 9600 baud,
with 8 data bits, no parity and one stop bit. Use a serial terminal like PuTTY, Tera Term,
or HyperTerminal using the protocol of 9600-N-8-1. Set the mode to: DIRECT, Flow
Control to: NONE and emulation to: ANSI. PuTTY and HyperTerminal set up instruc-
tions are available on our web site under “Downloads”.
RJ-11
Adapter
Pin
DB-9 D-SUB
Pin #
4 3 RS-232 Receive
3 2 RS-232 Transmit
2 5 Ground
Product’s point of
view Function Name.
Modular Jack
Pin Numbers

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ACS 4.4 G2 Installation and Operation Manual
OPERATION
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Connecting Multiple ACS 4.4 G2’s to a Single Serial Port
Multiple ACS 4.4 G2 switchers may be cascaded serially to operate from the same
serial port. The first step is to assign unit IDs to each ACS 4.4 G2. For example: you
can assign unit ID 1 to the first switcher and unit ID 2 to the second switcher. You must
parallel the serial ports of the ACS 4.4 G2’s, to do this plug the male end of a duplex
modular adapter (Allen-Tel AT202-6) into the supplied female (S9) DB-9 to RJ-11
adapter, then attach the supplied modular line cords into each of the duplex modular
adapter receptacles and the other ends into each ACS 4.4 G2 modular receptacles. See
the diagram below. NOTE: Up to four ACS 4.4 G2’s may be daisy chained by using
the above description and an Allen-Tel AT150, 5-jack modular adapter.
Serial Burst Mode Commands
Burst mode allows a computer or ASCII terminal to control and interrogate the unit.
This section defines all burst mode commands accepted by the ACS 4.4 G2. Each burst
mode commands starts with an asterisk (*) followed by a single decimal digit that cor-
responds to the unit (ID) address 0-3 and one or more ASCII characters specifying the
command. No carriage-return or linefeed is required to terminate the command except
for those few commands of variable length if the maximum length is not sent. If the
command requested a response, the response would consist of an upper case “S”, fol-
lowed by the unit address, and then the specific response. If acknowledgements are
enabled, successful commands are responded to with “RRR” while errors get an
“EEE” response. The syntax of each command is given below. The syntax shows the
command exactly as it should be sent, except that lower case characters represent val-
ues that should be substituted.
To ACS 4.4 G2 #1
To ACS 4.4 G2 #1

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ACS 4.4 G2 Installation and Operation Manual
OPERATION
Glossary Of Command Notation
Set-up Commands
*0MM - Open setup menu. Unit ID 0 only.
*uCEx - Enable Error and Good Responses - Where x = Y to enable and N = dis-
able. In this mode, when a command is sent that is in error, the unit will reply (pos-
sibly before receiving the entire command) with “EEE.” If the command is sent cor-
rectly, the unit will reply with “RRR.”
*uCDEF - Set factory defaults.
*uCIIttt - Set “PIP” Programmable Pulse Stretcher Input Duration = ttt: 000
–> 255 hundredths of seconds (255 = 2.55 Seconds)
*uCLx - Lock Front Panel if x is “L”. Unlock Front Panel if x is “U”
*uCPR- Power up audio state: Restore audio from power up state
*uCPS - Power up audio state: Save power up state
*uCRtt- Set Relay Momentary Pulse Length – tt: 00-99 for 00 –> 9.9 Seconds
Silence Sensor Set-up Commands
*uCSAtttt - Set silence sensor time delay to tttt seconds (0002 – 9999), 0000 = OFF
*uCSBtttt - Set silence sensor restore delay to tttt seconds (0002 – 9999), 0000 =
OFF
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ACS 4.4 G2 Installation and Operation Manual
OPERATION
Relay and Open Collector Commands
*uORrF - Unlatch output relay “r”
*uORrL - Latch output relay “r”
*uORrP - Pulse output relay “r”
*uOOoF - Unlatch open collector “o” (Only works in NON-Remote mode)
*uOOoL - Latch open collector “o” (Only works in NON-Remote mode)
*uOOoP - Pulse open collector “o” (Only works in NON-Remote mode)
Audio Switch Control Commands
*uiio - Apply input “ii” to output “o”
*uiiA - Apply input “ii” to ALL outputs
*uiiEott - Start overlap - Apply input ii to output o. After tt tenths of a second,
remove all other inputs from output o.
NOTE: Only one at a time can be pending per output. Max time 9.9 seconds
*uE - End overlap if in overlap mode. This applies to all outputs that have changed
since the last “end overlap” command was issued.
*uiiMA - Mute input “ii” for all outputs
*uiiMo - Mute input “ii” for output “o”
*uMo - Mute output “o”
*uMA - Mute all outputs
*uB,a,a,a,a Set all status ignoring mode: Lower 4 bits of A is channel #'s OR’d
together + 1, upper 4 bits is 41. NOTE: Input commands MUST be in CAPS.
A = all off
B = 1
C = 2
D = 1 + 2
E = 3
F = 3 + 1
G = 3 + 2
H = 3 + 2 + 1
I = 4 etc
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ACS 4.4 G2 Installation and Operation Manual
OPERATION
Special MIX mode commands (the switcher doesn’t need to be in MIX mode).
*uiiO1 For input ii, set output 1 on without affecting any other
*uiiO2 For input ii, set output 2 on without affecting any other
*uiiO3 For input ii, set output 3 on without affecting any other
*uiiO4 For input ii, set output 4 on without affecting any other
*uiiO5 For input ii, set output 1 off without affecting any other
*uiiO6 For input ii, set output 2 off without affecting any other
*uiiO7 For input ii, set output 3 off without affecting any other
*uiiO8 For input ii, set output 4 off without affecting any other
Information Retrieval Commands
*POLL - Respond with unit (ID) address in appropriate time slot. If there are multi-
ple units on the line, each will respond with a different delay after receipt of this
command.
*uSL - Send Audio Status: SuLo,x,x,x,x<CR><LF>. “u” is unit ID, “o” is output,
and “x” is “1”for connected; “0” for not connected for each respective input.
*uSPii - Send single input (GPI) PIP status. Response is “SuP,ii,x” where “x” is 0
if the corresponding input is high, 1 if low.
*uSPA - Send ALL input (GPI) PIP status. Response is:
“SuP,A,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x<CR><LF > where input 0 is first and input 15
is last. “x” is 0 if the corresponding input is high, 1 if low.
*uSO - Send status of all Open Collectors. Response is: SuO,x,x,x,x<CR><LF> (0
= OFF).
*uSR - Send status of all relays. Response is: SuR,x,x,x,x<CR><LF> (0 = OFF).
*uSS - Send status of silence sensor: SuS,a<CR><LF> a = 0 (not silent), 1 = silent
*uU - Send Unit Information:<name)><version (><cr><lf Example: ACS4.4_Vx.x
*uY - Display configuration
Real Time Control Commands
*uDxx - Delay xx seconds before processing next command.
*uDLxxx - Delay xxx seconds before processing next command.
*uZx - Echo character “x” to serial control port. This is useful in debugging com-
mand strings.
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ACS 4.4 G2 Installation and Operation Manual
OPERATION
Menu Mode
The command to enter menu mode is: *0MM. The menu mode displays certain
parameters and allows for the control and/or configuration of most switcher functions.
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Broadcast Tools(R) ACS 4.4G2 V0.3 - Menu
1 - Set PIP Minimum (0-2.55 sec). - Now:1.00 (sec)
2 - Set Relay/OC Pulse Hold Time (0 - 25.5 sec) - Now: 1.0
3 - Set Silence Sense Acquire Delay (sec). - Now: 10
4 - Set Silence Sense Restore Delay (sec). - Now: 5
5 - Set Silence Sense Thresholds - Now: -25, -25, -25, -25,
6 - Lock/Unlock Front Panel - Now: UNLOCKED
A - Turn ON Audio XPOINT
B - Turn OFF Audio XPOINT
C - Save Audio Macro
D - Load Audio Macro
E - Save Current Audio State for Power Up
F - Show Current Configuration and Status
G - Set Factory Defaults
Audio Status:
1->1 2->2 3->3 4->4
Enter Selection, or Q to quit:

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ACS 4.4 G2 Installation and Operation Manual
SPECIFICATIONS
Specifications *Audio Precision Test Equipment
Input Levels: Max + 24 dBu, balanced, bridging. 20kΩ .
Output Levels: Four stereo balanced outputs, +24 dBm. @ 600 Ω . / +26 dbu
@ 10K. Headphone output, 4.7 Ω . 100mw.
System Gain: 10 dB max.
Frequency Response: * 20 to 20 kHz; +/- .0.25dB
Signal/Noise Ratio: * >-84 dB nominal, weighted 20 to 22Khz
Distortion: * Less than 0.02% THD @ +26 dBu
Crosstalk: * -100 dB @ 1khz / -79 dB @ 10 kHz from adjacent off channel.
Input expansion port: Unbalanced summing inputs @ 10k , 0 dBu.
Switching Method: Digitally controlled professional level analog switch arrays.
Logic: Flash microprocessor / Non-volatile memory.
Operation Control: Front Panel - Momentary switches. Remote /” PIP”
(Triggers) - Momentary (40ms to 2.54 seconds response
time, compatible with CMOS/TTL logic, open collector or
contact closures to ground.
Status/Control: Serial - Multi-drop RS-232, 9600 or 38.4K, 8, N, 1.
Front Panel - LED indicators.
Control - 2 - SPDT Relays / Silence Sensor – 4 OC’s
Remote - 4 - Open collector outputs (6vdc @ 100ma max.)
RS-232 - Multi-drop RS-232, 9600 or 38.4K, 8, N,1.
Interfacing: Audio & Remote Control – RJ45 jacks & Plug-in euroblock
screw terminals. Accommodates 16 – 28 AWG wire.
Mating connectors supplied for euroblock connectors.
RS-232 Serial - RJ-11/6P4C reversed modular cable &
“S9” female 9-pin D-Sub adapter supplied. USB-RS-232
Adapter cable and/or Ethernet to serial interface. Optional.
Power: PS-1515/IEC Universal AC (100-240 VAC, 46-63 Hz w/IEC)
input, multi-voltage +/-15vdc) DC switching power supply.
CE. (Supplied with domestic IEC AC cord).
Mechanical: 8.50” x 7.10” x 1.576” (WDH) aluminum extrusion chassis
with (4) #6-32 screw thread mounting holes for optional
RA-1 rack shelf
Weight: 5 lbs. (unit and accessories).
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