Kramer AFM-20DSP User manual

P/N: 2900-301204 Rev 1 www.kramerAV.com
USER MANUAL
MODELS:
AFM-20DSP,AFM-20DSP-LE
20-Port Audio Matrix

Kramer Electronics Ltd.
AFM-20DSP –Contents
i
Contents
Introduction 1
Getting Started 1
Overview 2
Typical Applications 4
Defining AFM-20DSP and AFM-20DSP-LE 5
AFM-20DSP and AFM-20DSP-LE Front Panels 5
AFM-20DSP and AFM-20DSP-LE Rear Panels 6
Mounting AFM-20DSP / AFM-20DSP-LE 7
Connecting the 20-Port Audio Matrix 8
Connecting AFM-20DSP 8
Connecting AFM-20DSP-LE 10
Connecting to AFM-20DSP / AFM-20DSP-LE via RS-232 11
Operating and Controlling AFM-20DSP/AFM-20DSP-LE 12
Operating via Ethernet 12
Using Embedded Webpages 15
Browsing the AFM-20DSP Webpages 16
Using the Top Status Bar 18
Viewing the Matrix Area 20
Processing Audio Signals 22
Selecting Output Signals to Route to Amplifier Outputs 22
Linking Analog Inputs and Outputs 23
Processing a Signal 24
Routing Inputs to Outputs 37
Mixing Audio Signals 41
Defining Audio Settings 45
Defining Video Settings 46
Restarting and Resetting the Device 47
Defining Settings 49
Importing/Exporting Global Settings 49
Setting Access Security 49
Defining Communication Settings 52
Performing Firmware Upgrade 54
Setting Date and Time 55
Configuring Device Automation 56
Viewing Device Information 58
Upgrading Firmware 59
Technical Specifications 60
AFM-20DSP Technical Specs 60
AFM-20DSP-LE Technical Specs 61
Default Communication Parameters 63
Default EDID 63
Protocol 3000 65
Understanding Protocol 3000 65
Protocol 3000 Commands 66
Result and Error Codes 83

Kramer Electronics Ltd.
AFM-20DSP –Introduction
1
Introduction
Welcome to Kramer Electronics! Since 1981, Kramer Electronics has been providing a world
of unique, creative, and affordable solutions to the vast range of problems that confront the
video, audio, presentation, and broadcasting professional on a daily basis. In recent years, we
have redesigned and upgraded most of our line, making the best even better!
Getting Started
We recommend that you:
•Unpack the equipment carefully and save the original box and packaging materials for
possible future shipment.
•Review the contents of this user manual.
Go to www.kramerav.com/downloads/AFM-20DSP or
www.kramerav.com/downloads/AFM-20DSP-LE to check for up-to-date user manuals,
application programs, and to check if firmware upgrades are available (where appropriate).
Achieving the Best Performance
•Use only good quality connection cables (we recommend Kramer high-performance,
high-resolution cables) to avoid interference, deterioration in signal quality due to poor
matching, and elevated noise levels (often associated with low quality cables).
•Do not secure the cables in tight bundles or roll the slack into tight coils.
•Avoid interference from neighboring electrical appliances that may adversely influence
signal quality.
•Position your Kramer AFM-20DSP / AFM-20DSP-LE away from moisture, excessive
sunlight and dust.
Safety Instructions
Caution:
•This equipment is to be used only inside a building. It may only be connected to other
equipment that is installed inside a building.
•For products with relay terminals and GPI\O ports, please refer to the permitted rating
for an external connection, located next to the terminal or in the User Manual.
•There are no operator serviceable parts inside the unit.

Kramer Electronics Ltd.
AFM-20DSP –Introduction
2
Warning:
•Use only the power cord that is supplied with the unit.
•Disconnect the power and unplug the unit from the wall before installing.
•Do not open the unit. High voltages can cause electrical shock! Servicing by qualified
personnel only.
•To ensure continuous risk protection, replace fuses only according to the rating
specified on the product label which located on the bottom of the unit.
Recycling Kramer Products
The Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC aims to reduce
the amount of WEEE sent for disposal to landfill or incineration by requiring it to be collected
and recycled. To comply with the WEEE Directive, Kramer Electronics has made
arrangements with the European Advanced Recycling Network (EARN) and will cover any
costs of treatment, recycling and recovery of waste Kramer Electronics branded equipment on
arrival at the EARN facility. For details of Kramer’s recycling arrangements in your particular
country go to our recycling pages at www.kramerav.com/support/recycling.
Overview
Congratulations on purchasing your Kramer AFM-20DSP / AFM-20DSP-LE 20-Port Audio
Matrix.
AFM-20DSP is a high-performance, professional audio matrix switcher with 20 analog ports
that can be configured as inputs or outputs according to preset I/O configurations. AFM-
20DSP includes multi-channel DSP, built-in 2x60W@8Ω and 1x120W@70V / 100V power
amplifier, 4x4 Dante interface, HDMI™embedding and de-embedding, and S/PDIF. The
comprehensive and user-friendly graphic interface makes configuring every detail of your
audio system intuitive and easy.
AFM-20DSP-LE is a high-performance, professional audio matrix switcher with 20 analog
ports that can be configured as inputs or outputs according to preset I/O configurations.
AFM-20DSP-LE includes multi-channel DSP and a comprehensive and user-friendly graphic
interface that makes configuring every detail of your audio system intuitive and easy.
The following table shows the functionality of each device:
Device Name
Maestro
Flex I/O
Dante
HDMI
Amp
S/PDIF
AFM-20DSP
Yes
Yes
Yes
Yes
Yes
Yes
AFM-20DSP-LE
Yes
Yes
No
No
No
No
Most of the information included in this user manual is relevant to both AFM-20DSP and to
AFM-20DSP-LE. Sections referring to Dante, HDMI, S/PDIF and amplifier ports (in the
embedded web pages and Protocol 3000 sections) are not relevant to AFM-20DSP-LE.
Unless specified otherwise, AFM-20DSP is used throughout this user manual to refer to both
devices.

Kramer Electronics Ltd.
AFM-20DSP –Introduction
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AFM-20DSP and AFM-20DSP-LE provide exceptional quality, advanced and user-friendly
operation, and flexible control.
Exceptional Quality
•High-Performance, Professional Audio Matrix Switcher –Professional, studio grade
signal conversion technology, including the latest generation 32-bit advanced Digital
Analog Converter architecture to achieve excellent dynamic performance and improved
tolerance to clock jitter. Maintains the quality of the original audio signal with selectable
sampling rates up to 96kHz. Flat frequency response, unmatched sonic performance,
excellent signal to noise ratio, and extraordinarily low distortion levels.
•Multi-Channel Processing –Provides DSP (Digital Sound Processing) that enables
simultaneous processing of all input and output signals.
•Programmable –Supports up to 10 global presets per I/O configuration plus 10 mixer
snapshot presets.
•Audio De-embedding for AFM-20DSP only –De-embeds the audio signal from the HDMI
input for routing to any of the outputs or for routing to the loop output.
Advanced and User-friendly Operation
•Intuitive and Comprehensive Configuration and Control –Via a powerful, user-friendly
graphic interface, set volume (gain and attenuation) and DSP per input, execute routing,
select line in, mic in, phantom power or line out on each port, configure master level and
more.
•Convenient Control –Via the user-friendly embedded webpages and RS-232 serial
controller, control signal routing, independent volume.
•Easy, Cost-Effective Maintenance –LED indicators for main power, line in/out, mic in,
clipping (power amp, Dante sync, and HDMI for AFM-20DSP only), enable easy local
maintenance and troubleshooting. Local firmware upgrade via the USB type-A port
ensures lasting, field-proven deployment.
•Built-in Power Amplifier for AFM-20DSP only –2x60W @ 8Ω and 1x120W @ 70V /
100V power amplifier.
•Easy Installation –19” enclosure for rack mounting a unit in a 1U rack space with
included rack ears and universal 100-240V AC power connection.
•Firmware Upgrade –Ethernet-based, via software upgrade tool.

Kramer Electronics Ltd.
AFM-20DSP –Introduction
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Flexible Connectivity
•Wide Range of I/O Formats:
▪AFM-20DSP: 20 analog ports, 4x4 Dante interface, HDMI input and output, and
S/PDIF input and output.
▪AFM-20DSP-LE: 20 analog ports.
•Maximum Flexibility:
▪AFM-20DSP: use the default 12x8 I/O matrix configuration or select one of the preset
analog I/O configurations.
Route any input to any output, even between different formats (for example, route an
analog input to an S/PDIF output); control volume and DSP per port; route any of the
ports to the power amplifier.
▪AFM-20DSP-LE: use the default 12 x8 I/O matrix configuration or select one of the
preset analog I/O configurations.
Typical Applications
AFM-20DSP is ideal for the following typical applications:
•Conference rooms and auditoriums.
•Houses of worship.
•Large corporate connectivity systems.
Controlling your AFM-20DSP
Control your AFM-20DSP by RS-232 serial commands transmitted by a touch screen system,
PC, or other serial controller and via the Ethernet using built-in user-friendly webpages.

Kramer Electronics Ltd.
AFM-20DSP –Defining AFM-20DSP and AFM-20DSP-LE
5
Defining AFM-20DSP and
AFM-20DSP-LE
This section defines AFM-20DSP and AFM-20DSP-LE.
AFM-20DSP and AFM-20DSP-LE Front Panels
Figure 1: AFM-20DSP Front Panel
Figure 2: AFM-20DSP-LE Front Panel
#
Feature
Function
STATUS LED
Indicates system status:
•Almost 3 cycles of
red/blue/off/green LEDs
flashing in sequence for about
30 seconds when system is
starting up, and the application
has not been launched yet.
•Flashing green when application
is initializing.
•Green when system is ready for
operation.
PORTS LEDs
(1 to 20)
Indicate port status:
•Green when an input signal is
present, and the port is defined
as line in.
•White when defined as line out.
•Blue when defined as mic in.
•Red when in clipping state.
•Orange when in limiting state.
•Off when there is no signal on the
input.
IN OUT DANTE™
LEDs (1 to 4)
Indicate Dante signal status:
•Green when a signal is
detected.
•Red when clipping occurs.
•Orange when in Limiting state.
•Off when no signal is detected.
HDMI™
LEDs
EMBED
Lights green when an analog audio signal is associated with the HDMI OUT
signal. Otherwise remains OFF.
DE-EMBED
Lights green when the HDMI IN audio signal is present. Otherwise remains
OFF.
IN OUT S/PDIF LEDs
Indicate S/PDIF status:
•Green when a signal is detected.
•Off when no signal is detected.
If a signal is detected only on one channel, either left only or right only,
the status LED lights green.
1
2
3
4
5

Kramer Electronics Ltd.
AFM-20DSP –Defining AFM-20DSP and AFM-20DSP-LE
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#
Feature
Function
CH 1(L)/CH 2(R)
AMPLIFIER LEDs
Indicate amplifier signal status:
•Green when a signal is detected.
•Off when no signal is detected.
In the webpage, Ch1 and CH2 are referred to as AMP 1 and AMP 2,
respectively.
AFM-20DSP and AFM-20DSP-LE Rear Panels
Figure 3: AFM-20DSP Rear Panel
Figure 4: AFM-20DSP-LE Rear Panel
#
Feature
Function
PORTS 3-pin
Terminal Block
Connectors (1 to 20)
Interchangeable balanced mono audio ports. Connect to an audio source or
acceptor in one of 7 selectable I/O configurations: 16x4, 14x6, 12x8, 10x10,
8x12, 6x14, 4x16
Each port can be defined as line in, mic in, mic + 48V in, or line out.
HDMI™ IN Connector
Connect to an HDMI source for de-embedding the audio signal (the video
signal is passed through to the output).
HDMI™ OUT
Connector
Connect to an HDMI acceptor for embedding an audio signal from the matrix.
S/PDIF OUT RCA
Connector
Connect to a digital stereo audio acceptor.
S/PDIF IN RCA
Connector
Connect to a digital stereo audio source.
SPEAKER OUT
Outputs two selected audio signals in two channels.
For Lo-Z: connect stereo output to Lo-Z speakers: L+ and L- to the left
speaker; R+R- to the right speaker.
For Hi-Z (70V or 100V): connect Hi-Z and COM to mono Hi-Z speakers.
Dante PoE RJ-45 Port
Connect to Dante audio via the network. Provides 4 Tx channels and 4 Rx
channels.
By default, DHCP is enabled.
RS-232 3-pin Terminal
Block Connector
Connect to a PC/serial controller to control the device.
ETHERNET RJ-45
Connector
Connect to a PC via a LAN to control the device and for firmware upgrade.
Mini USB Connector
Connect to your PC to control the device.
RESET Recessed
Button
Press and hold for about 5 seconds to reset the configuration to its default
parameters.
Mains Power
Connector and Fuse
Plug in the power cord.
POWER Illuminated
Power Switch
Turn the device on and off.
6
7
8
9
10
11
12
13
14
15
16
17
18
19

Kramer Electronics Ltd.
AFM-20DSP –Mounting AFM-20DSP / AFM-20DSP-LE
7
Mounting AFM-20DSP /
AFM-20DSP-LE
This section provides instructions for mounting AFM-20DSP / AFM-20DSP-LE. Before
installing, verify that the environment is within the recommended range:
•Operation temperature –0to 40C (32 to 104F).
•Storage temperature –-40to +70C (-40 to +158F).
•Humidity –10% to 90%, RHL non-condensing.
Caution:
•Mount AFM-20DSP / AFM-20DSP-LE before connecting any cables or power.
Warning:
•Ensure that the environment (e.g., maximum ambient temperature & air flow) is
compatible for the device.
•Avoid uneven mechanical loading.
•Appropriate consideration of equipment nameplate ratings should be used for avoiding
overloading of the circuits.
•Reliable earthing of rack-mounted equipment should be maintained.
To mount the AFM-20DSP in a rack
Attach both rack ears by removing the screws from each side of
the machine and replacing those screws through the rack ears or
place the machine on a table.
For more information go to www.kramerav.com/downloads/AFM-20DSP

Kramer Electronics Ltd.
AFM-20DSP –Connecting the 20-Port Audio Matrix
8
Connecting the 20-Port Audio
Matrix
This section describes how to connect the AFM-20DSP and AFM-20DSP-LE devices.
Connecting AFM-20DSP
Always switch off the power to each device before connecting it to your AFM-20DSP. After
connecting your AFM-20DSP, connect its power and then switch on the power to each
device.
Figure 5: Connecting to the AFM-20DSP Rear Panel
To connect AFM-20DSP as illustrated in the example in Figure 5:
1. Connect the following audio sources to the PORT balanced mono 3-pin terminal block
connectors (port I/O is set to 12x8 in this example):
▪Microphones to ports 1 to 9.
▪The audio output of the Kramer VP-444 scaler to port 10.
▪An MP3 player to ports 11 and 12.
7

Kramer Electronics Ltd.
AFM-20DSP –Connecting the 20-Port Audio Matrix
9
2. Connect the PORT balanced mono 3-pin terminal block connectors (port I/O is set to
12x8 in this example) to the following audio acceptors:
▪Ports 13 and 14 to powered speakers (for example, Kramer Tavor 6-O).
▪Port 15 to a power amplifier with speakers.
▪Ports 16 to 20 to audio receivers
3. Connect the HDMI connectors as follows:
▪A source (for example, a Blu-ray player) to HDMI IN .
▪HDMI OUT to an acceptor (for example, a display).
4. Connect the S/PDIF digital audio ports as follows:
▪A source (for example, a Blu-ray player to S/PDIF IN .
▪S/PDIF OUT to an acceptor (for example, an audio receiver).
5. Connect the SPEAKER OUT Hi-Z OUT or Lo-Z OUT 4-pin terminal block connector
as follows:
▪For Hi-Z connection: connect Hi-Z and COM terminal blocks to the + and –terminals
of a mono speaker (for example, the Galil 8-C ceiling speakers, daisy chained).
The speakers either output the left side (L+, L-) of the audio input or the stereo input
reduced to a mono signal (see Defining Audio Settings on page 45) .
▪For Lo-Z connection: connect the L+ and L- connectors to the left-side speaker (for
example, Yarden 6-O) and the R+ and R- connectors to the right-side.
6. Connect the Dante RJ-45 port to up to 4Tx and for Rx audio channels via the
network.
7. Connect the RS-232 3-pin terminal block connector to the RS-232 port on a
controller (for example, a laptop) to control the AFM-20DSP.
8. Connect the ETHERNET RJ-45 port to the Ethernet to control the AFM-20DSP and
use for firmware upgrade.
9. Connect the mini USB connector to a control device (for example, a laptop) to
control the AFM-20DSP.
10.Connect the power cord to the AFM-20DSP mains socket and to the mains
electricity (not shown in Figure 5).
7
8
9
11
10
12
13
14
15
16
18

Kramer Electronics Ltd.
AFM-20DSP –Connecting the 20-Port Audio Matrix
10
Connecting AFM-20DSP-LE
Always switch off the power to each device before connecting it to your AFM-20DSP-LE.
After connecting your AFM-20DSP-LE, connect its power and then switch on the power to
each device.
Figure 6: Connecting to the AFM-20DSP-LE Rear Panel
To connect AFM-20DSP-LE as illustrated in the example in Figure 6:
1. Connect the following audio sources to the PORT balanced mono 3-pin terminal block
connectors (port I/O is set to 12x8 in this example):
▪Microphones to ports 1 to 9.
▪The audio output of the Kramer VP-444 scaler to port 10.
▪An MP3 player to ports 11 and 12.
2. Connect the PORT balanced mono 3-pin terminal block connectors (port I/O is set to
12x8 in this example) to the following audio acceptors:
▪Ports 13 and 14 to powered speakers (for example, Kramer Tavor 6-O).
▪Port 15 to a power amplifier with speakers.
▪Ports 16 to 20 to audio receivers.
3. Connect the RS-232 3-pin terminal block connector to the RS-232 port on a
controller (for example, a laptop) to control the AFM-20DSP-LE.
4. Connect the ETHERNET RJ-45 port to the Ethernet to control the AFM-20DSP-LE
and use for firmware upgrade.
5. Connect the mini USB connector to a control device (for example, a laptop) to
control the AFM-20DSP-LE.
6. Connect the power cord to the AFM-20DSP-LE mains socket and to the mains
electricity (not shown in Figure 6).
7
7
14
15
16
18

Kramer Electronics Ltd.
AFM-20DSP –Connecting the 20-Port Audio Matrix
11
Connecting to AFM-20DSP / AFM-20DSP-LE via RS-232
You can connect to the AFM-20DSP via an RS-232 connection using, for example, a PC.
The AFM-20DSP features an RS-232 3-pin terminal block connector allowing the RS-232 to
control the AFM-20DSP.
Connect the RS-232 terminal block on the rear panel of the AFM-20DSP to a PC/controller,
as follows:
From the RS-232 9-pin D-sub serial port connect:
•Pin 2 to the TX pin on the AFM-20DSP RS-232
terminal block
•Pin 3 to the RX pin on the AFM-20DSP RS-232
terminal block
•Pin 5 to the G pin on the AFM-20DSP RS-232 terminal
block
RS-232 Device AFM-20DSP
AFM-20DSP-LE
13

Kramer Electronics Ltd.
AFM-20DSP –Operating and Controlling AFM-20DSP/AFM-20DSP-LE
12
Operating and Controlling AFM-
20DSP/AFM-20DSP-LE
AFM-20DSP/AFM-20DSP-LE can be monitored via the front panel LEDs (see AFM-20DSP
and AFM-20DSP-LE Front Panels on page 5) and controlled via the:
•Embedded webpages(see Using Embedded Webpages on page 15).
•Protocol commands (see Protocol 3000 Commands on page 66).
Operating via Ethernet
You can connect to the AFM-20DSP via Ethernet using either of the following methods:
•Directly to the PC using a crossover cable (see Connecting the Ethernet Port Directly to
a PC on page 12).
•Via a network hub, switch, or router, using a straight-through cable (see Connecting the
Ethernet Port via a Network Hub or Switch on page 14).
To connect via a router and your IT system is based on IPv6, speak to your IT department for
specific installation instructions.
Connecting the Ethernet Port Directly to a PC
You can connect the Ethernet port of the AFM-20DSP directly to the Ethernet port on your PC
using a crossover cable with RJ-45 connectors.
This type of connection is recommended for identifying the AFM-20DSP
with the factory configured default IP address.
After connecting the AFM-20DSP to the Ethernet port, configure your PC as follows:
1. Click Start > Control Panel > Network and Sharing Center.
2. Click Change Adapter Settings.
3. Highlight the network adapter you want to use to connect to the device and click Change
settings of this connection.
The Local Area Connection Properties window for the selected network adapter
appears.

Kramer Electronics Ltd.
AFM-20DSP –Operating and Controlling AFM-20DSP/AFM-20DSP-LE
13
Figure 7: Local Area Connection Properties Window
4. Highlight either Internet Protocol Version 6 (TCP/IPv6) or Internet Protocol Version 4
(TCP/IPv4) depending on the requirements of your IT system.
5. Click Properties.
The Internet Protocol Properties window relevant to your IT system appears as shown in
Figure 8 or Figure 9.
Figure 8: Internet Protocol Version 4 Properties Window

Kramer Electronics Ltd.
AFM-20DSP –Operating and Controlling AFM-20DSP/AFM-20DSP-LE
14
Figure 9: Internet Protocol Version 6 Properties Window
6. Select Use the following IP Address for static IP addressing and fill in the details as
shown in Figure 10.
For TCP/IPv4 you can use any IP address in the range 192.168.1.1 to 192.168.1.255
(excluding 192.168.1.39) that is provided by your IT department.
Figure 10: Internet Protocol Properties Window
7. Click OK.
8. Click Close.
Connecting the Ethernet Port via a Network Hub or Switch
You can connect the Ethernet port of the AFM-20DSP to the Ethernet port on a network hub
or using a straight-through cable with RJ-45 connectors.
Configuring the Ethernet Port
You can set the Ethernet parameters via the embedded webpages.

Kramer Electronics Ltd.
AFM-20DSP –Using Embedded Webpages
15
Using Embedded Webpages
The AFM-20DSP can be operated remotely using the embedded webpages. The webpages
are accessed using a Web browser and an Ethernet connection (see Browsing the AFM-
20DSP Webpages on page 16).
Before attempting to connect:
•Perform the procedures in Operating via Ethernet on page 12.
•Ensure that your browser is supported.
The following operating systems and Web browsers are supported:
Operating Systems
Versions
Windows 7
Chrome
Windows 10
Chrome
Mac
Chrome
Some features might not be supported by some cellphone operating systems.
The AFM-20DSP webpage enables performing the following functions:
•Using the Top Status Bar on page 18.
•Processing Audio Signals on page 22.
•Routing Inputs to Outputs on page 37.
•Mixing Audio Signals on page 41.
•Defining Audio Settings on page 45.
•Defining Video Settings on page 46.
•Restarting and Resetting the Device on page 47.
•Defining Settings on page 49.
•Defining Communication Settings on page 52.
•Performing Firmware Upgrade on page 54.
•Setting Date and Time on page 55.
•Configuring Device Automation on page 56.
•Viewing Device Information on page 58.
Some of the same tasks can be carried out via DSP, Matrix and Mixer pages, for your
convenience. For example, you can link analog input and output pairs through any of these 3
pages.

Kramer Electronics Ltd.
AFM-20DSP –Using Embedded Webpages
16
Browsing the AFM-20DSP Webpages
To browse the AFM-20DSP webpages:
1. Open your Internet browser.
2. Type the IP Address of the device in the Address bar of your browser. For example, the
default IP Address:
3. The authentication page appears.
4. Enter the Username and Password (Admin/Admin, by-default):
Figure 11: Embedded Webpages Authentication

Kramer Electronics Ltd.
AFM-20DSP –Using Embedded Webpages
17
5. Click Sign in.
The Main webpage appears.
Figure 12: AFM-20DSP Main Page with Navigation List on Left

Kramer Electronics Ltd.
AFM-20DSP –Using Embedded Webpages
18
6. Click the arrow to hide the navigation list.
Figure 13: Main Page –Navigation List Hidden
7. Click the desired item in the navigation pane to set and control the device.
Using the Top Status Bar
Use the top status bar to perform the following functions:
•Viewing/Changing Current Analog I/O Configuration and Preset Name on page 19.
•Changing Security Settings on page 19.
•Entering/exiting full-screen display view by clicking the display-view icon ( / ).