Kramer Cobra MX-88 User manual

Kramer Electronics, Ltd.

USER MANUAL

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Model:

Cobra MX-88

8x8 Matrix Switcher

Contents

Introduction 1

Getting Started 1

Overview 1

Cobra MX-88 8x8 Matrix Switcher Operation 2

4.1

Keypad Description 2

4.2

Input to Output Assignment 3

4.3

Preset Command 3

4.4

Recall Command 3

4.5

All Off Command 3

CAT 5 Serial Control/Command 4

5.1

RS-232 Protocol 4

5.2

RS-232 Hardware interface 4

5.3

Commands 4

5.4

Command Strings 4

5.5

Output Commands 5

5.6

Preset Commands 5

5.7

Recall Commands 6

5.8

Status Commands 6

5.9

ID Commands 7

5.10

Clear Working Preset 7

Address Configuration Commands 7

Technical Specifications 9

Introduction

1 Introduction

Welcome to Kramer Electronics (since 1981): a world of unique, creative and

affordable solutions to the infinite range of problems that confront the video,

audio and presentation professional on a daily basis. In recent years, we have

redesigned and upgraded most of our line, making the best even better! Our

500-plus different models now appear in 8 Groups

, which are clearly defined

by function.

Congratulations on purchasing your Kramer Cobra MX-88 8x8 Matrix

Switcher. The Cobra MX-88 8x8 Matrix Switcher is designed for Plug and

Play operation and is fully compatible with all versions of the Kramer Cobra

series of CAT 5 transmitters/receivers.

The Kramer Cobra series products are not compatible with Kramer non-Cobra

series products.

2 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

3 Overview

Achieving the best performance when using the Cobra MX-88 8x8 Matrix

Switcher means:

Connecting only good quality connection cables, thus avoiding

interference, deterioration in signal quality due to poor matching, and

elevated noise levels (often associated with low quality cables)

Avoiding interference from neighboring electrical appliances that may

adversely influence signal quality and positioning your Cobra MX-88 in a

location free from moisture and away from excessive sunlight and dust

1 GROUP 1: Distribution Amplifiers; GROUP 2: Video and Audio Switchers, Matrix Switchers and Controllers; GROUP 3:

Video, Audio, VGA/XGA Processors; GROUP 4: Interfaces and Sync Processors; GROUP 5: Twisted Pair Interfaces;

GROUP 6: Accessories and Rack Adapters; GROUP 7: Scan Converters and Scalers; and GROUP 8: Cables and Connectors

KRAMER: SIMPLE CREATIVE TECHNOLOGY

Cobra MX-88 8x8 Matrix Switcher Operation

Caution – No operator-serviceable parts inside unit.

Warning – Use only the Kramer Electronics input power

wall adapter that is provided with this unit

Warning – Disconnect power and unplug unit from wall

before installing or removing device or servicing unit.

Warning – This equipment is not intended for, nor does it

support, distribution through an Ethernet network. Do not

connect these devices to any sort of networking or

telecommunications equipment!

Note, CAT 5 cabling

must be pinned to the TIA-EIA T568B wiring

specification.

4 Cobra MX-88 8x8 Matrix Switcher Operation

This section describes how to operate the Cobra MX-88 8x8 Matrix Switcher.

4.1 Keypad Description

The Cobra MX-88 8x8 Matrix Switcher provides a front-panel keypad that

may be used to configure the input to output channel assignments.

Additionally, these assignments may be saved as preset configurations. Eight

configurations may be saved for later use.

When an input or output channel is selected, the key will be illuminated.

Pressing an input or output key will “toggle” the selection. It is not necessary

to press the CANCEL key to remove only the selected key from the current

assignment. The CANCEL key is used to abort any operation in progress, and

will also re-initialize all input and output key selections. The ENTER key will

update the matrix assignments with the current selection.

The Cobra MX-88 8x8 Matrix Switcher will “remember” the current preset

configuration if power is removed, and will return to this state when power is

restored. If the current configuration has not been saved as a preset however,

the unit will recall the last saved preset.

An eight by eight display is furnished to provide the user with a visual

overview of the current matrix assignments.

1 For example: model number AD2512C, part number 2535-000251

Cobra MX-88 8x8 Matrix Switcher Operation

4.2 Input to Output Assignment

To assign an input channel (source) to an output channel (destination), press

the desired input key on the top row, and the desired output key(s) on the

bottom row of the selection keypad. If any outputs are assigned to the

selected input channel, the keys will be illuminated. When all assignments

have been made, press the ENTER key to update the matrix, or press the

CANCEL key to start again.

Multiple output channels may be assigned to a single input channel, but only

one input channel may be assigned to each output channel. To turn an output

channel off, press only the output key, then the ENTER key.

Pressing an input or output key will “toggle” the selection. It is not necessary

to press the CANCEL key to remove only the selected key from the current

assignment.

Pressing an input key will illuminate the input key and all outputs assigned to

this input. To re-assign the outputs to a new input, press the input key again,

then press the new input key. Press the ENTER key to update the matrix, or

press the CANCEL key to start again.

To turn an output channel off, make sure no inputs are selected, then press

only the output key, and the ENTER key.

4.3 Preset Command

To save the current matrix configuration, press the PRESET key, then the

input key that corresponds to the preset you wish to overwrite (1 – 8). Press

the ENTER key to save or the CANCEL key to start again.

4.4 Recall Command

To recall a saved preset configuration, press the RECALL key, then the input

key that corresponds to the preset you wish to recall (1 – 8). Press the ENTER

key to load the preset configuration or the CANCEL key to start again.

4.5 All Off Command

To turn all outputs off simultaneously, hold the CANCEL key for

approximately five seconds.

KRAMER: SIMPLE CREATIVE TECHNOLOGY

CAT 5 Serial Control/Command

5 CAT 5 Serial Control/Command

5.1 RS-232 Protocol

The Cobra MX-88 will echo each command character that is received via the

RS232 port. When using an external Control System to control the MX-88, a

delay of at least 10 milliseconds must be inserted between characters. This

will allow enough time for the switcher to echo the character back to the

Control System, and accept the next character.

Example: To connect Input 1 to Output 5, the command O5=1<CR> should

be transmitted: O (10ms Delay) 5 (10ms Delay) = (10ms Delay) 1 (10ms

Delay) <CR>”.

7-bit ASCII: 8 data bits, no parity, 1 stop bit, 9600 bps (9600 8N1).

All commands are Upper Case.

5.2 RS-232 Hardware interface

Label Signal

TX+ RS-232 Transmit (TD)

TX- Not Used

RX+ RS-232 Receive (RD)

RX- Not Used

GND GND

5.3 Commands

Command Description ASCII Hex

“Output” “O” 4F

“Preset” “P” 50

“Recall (Preset)” “R” 52

“Status Report” “S” 53

“ID Report” “?” 3F

“Clear Working Preset” “C” 43

“Address Configuration” “A” 41

5.4 Command Strings

A valid command string will begin with a Command character, and terminate

with a “Carriage Return” (<CR>). The format is as follows:

CAT 5 Serial Control/Command

5.5 Output Commands

The following Output Command formats shall be used:

Ox=<CR> : Report an output (x) channel configuration.

Device replies with:

Ox=y<CR><LF>

Parameters:

x = Output channel (1 - 8)

y = Input channel assigned to selected output channel (0 = OFF)

Ox=y<CR> : Configure an output (x) channel.

Device replies with:

Ox=y<CR><LF>

Parameters:

x = Output channel (1 - 8)

y = Input channel assigned to selected output channel (0 = OFF)

5.6 Preset Commands

The following Preset Command formats shall be used:

Px=<CR> : Report a preset (x) configuration.

Device replies with:

Px=a,b,c,d,e,f,g,h<CR><LF>

Parameters:

x = Preset (0 - 8) – If x = 0, the current (working) configuration is

reported.

a = Output 1 input selection (0 = OFF)

b = Output 2 input selection (0 = OFF)

h = Output 8 input selection (0 = OFF)

Px<CR> : Saves current (working) configuration as a preset (x) configuration.

Device replies with:

Preset x Stored! <CR><LF>

Parameters:

x = Preset (1 - 8)

Px=a,b,c,d,e,f,g,h<CR> : Configures a preset.

Device replies with:

Preset x Stored! <CR><LF>

If x = 0 or if x = a recalled preset, the current working preset is reported

as:

P0=a,b,c,d,e,f,g,h<CR><LF>

KRAMER: SIMPLE CREATIVE TECHNOLOGY

CAT 5 Serial Control/Command

If x = a stored preset, the new preset configuration will be saved in

preset memory

location x.

Parameters:

x = Preset (0 - 8)

a = Output 1 input selection (0 = OFF)

b = Output 2 input selection (0 = OFF)

h = Output 8 input selection (0 = OFF)

5.7 Recall Commands

The following Recall Command formats shall be used:

Rx<CR> : Recall preset (x) and copy to current working preset.

Device replies with:

P0=a,b,c,d,e,f,g,h<CR><LF>

Parameters:

a = Output 1 input selection (0 = OFF)

b = Output 2 input selection (0 = OFF)

h = Output 8 input selection (0 = OFF)

5.8 Status Commands

The following Recall Command formats shall be used:

S=<CR> : Report master device status.

Device replies with:

Px=a,b,c,d,e,f,g,h<CR><LF>

P1=a,b,c,d,e,f,g,h<CR><LF>

P2=a,b,c,d,e,f,g,h<CR><LF>

P3=a,b,c,d,e,f,g,h<CR><LF>

P4=a,b,c,d,e,f,g,h<CR><LF>

P5=a,b,c,d,e,f,g,h<CR><LF>

P6=a,b,c,d,e,f,g,h<CR><LF>

P7=a,b,c,d,e,f,g,h<CR><LF>

P8=a,b,c,d,e,f,g,h<CR><LF>

Parameters:

x = Current (working) preset If x = 1 – 8 then a stored preset is

loaded. If any output configuration is changed after loading a stored

preset, then x = 0.

a = Output 1 input selection (0 = OFF)

Address Configuration Commands

b = Output 2 input selection (0 = OFF)

h = Output 8 input selection (0 = OFF)

5.9 ID Commands

The following ID Command formats shall be used:

? <CR> : Report ID / firmware version

Device replies with:

MX88 Core vx.y<CR><LF>

MX88 Panel vx.y<CR><LF>

Parameters:

x = Major firmware revision

y = Minor firmware revision

5.10 Clear Working Preset

This command will turn all outputs off immediately.

C<CR> : Clear working preset

Device replies with: P0=0,0,0,0,0,0,0,0<CR><LF>

6 Address Configuration Commands

The following Address Configuration Command formats shall be used:

A=<CR> : Report device hardware address configuration.

Device replies with:

A=xx<CR><LF>

Parameters:

xx = Device address

A=xx<CR> : Configure device hardware address.

Device replies with:

A=xx<CR><LF>

Parameters:

xx = Hardware Address (“00” – “99”)

1. All commands are “echoed” at the terminal prompt.

2. Any invalid command sequences will return an error prompt / string.

KRAMER: SIMPLE CREATIVE TECHNOLOGY

Address Configuration Commands

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