Page 1
2000 Sterling Road • Box 720
Mount Marion, NY 12456
800-898-0759 • 845-339-9555
Fax: 845-339-0231
www.lairdtelemedia.com
Page 2
LTM-4100
Multiformat 4x1 Selective Switcher
(Component, Y/C, Composite, Balanced Audio, RS422)
Model LTM-4100 User Manual
CE
© 2001 Laird Telemedia.
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LTM-4100
Multiformat 4x1 Selective Switcher
(Component, Y/C, Composite, Balanced Audio, RS422)
800-898-0759 • 845-339-9555 • 2000 Sterling Road • Mount Marion, NY 12456 • www.lairdtelemedia.com
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1. To prevent fire or shock hazard, do not expose this equipment to the environment of Humidity and/or
dust. Do not use this equipment in an unprotected outdoor installation or any area classified as a
wet area.
2. The operating temperature of this product must be kept between -40°C and +95°C. Direct sunlight
or an intense source of heat, direct or ambient, must not be introduced to the product either by
induction or contact.
3. Always keep the product on a stable and secure base or enclosure. Do not drop the product or subject it to sudden heavy impact.
4. Provide adequate ventilation so that thermal characteristics do not cause an increase in product temperature to resulting in overheating.
5. Do not clean the unit by using electrically conductive or corrosive chemicals. Always be certain to
unplug the unit from AC wall power before any major cleaning. Use a damp cloth only for cleaning.
6. Do not subject the product to electrical mains power over voltage:The product must be used at the
rated supply voltages indicated on the product rear panel only.
7. Do not plug the product into an overloaded electrical outlet. This may result in fire or electrical
shock.
8. Object Ingress and Liquid Entry: Never insert or push sharp metal objects into the product or use such
devices for an attempt at opening or servicing the product. Servicing should be referred to a trained
and qualified technician only. Do not allow liquid of any type to enter the unit. Do not allow the unit
to be submersed in water as this may cause a shock hazard.
9. A trained qualified technician should perform all servicing of the unit.There are no serviceable components within the unit for user access.
Safety Precautions
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LTM-4100
Multiformat 4x1 Selective Switcher
(Component, Y/C, Composite, Balanced Audio, RS422)
800-898-0759 • 845-339-9555 • 2000 Sterling Road • Mount Marion, NY 12456 • www.lairdtelemedia.com
- Page 1 -
The LTM-4100 is a Multi-format 4x1 Routing System for the most complex Multimedia signal management.It accepts
3 Video Formats: Component, Y/C & Composite, as well as 2-Channel Balanced Audio and RS422 Machine
Control for selection to a single output by simply pushing a front panel switch.
RS232 external control & included Windows software provides PC-based control via its serial port. A unique
embedded address allows up to Ten (10) LTM-4100 to be controlled by one PC.
The LTM-4100 operates on 110/220 Volts with an automatic switching power supply, and will process NTSC, PAL, PAL-M,
PAL-N and SECAM signals. It is housed in a 2RU cabinet.
GENERAL DESCRIPTION
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LTM-4100
Multiformat 4x1 Selective Switcher
(Component, Y/C, Composite, Balanced Audio, RS422)
800-898-0759 • 845-339-9555 • 2000 Sterling Road • Mount Marion, NY 12456 • www.lairdtelemedia.com
- Page 3 -
The LTM-4100 product has been developed for use in broadcast facilities.All standards and performance specifications are designed for broadcast
equipment. Balanced zero offset signals are necessary in most cases for proper operation. Signals with high DC offset will not pass properly. Audio
signals should be balanced at 0dBm. The LTM-4100 is set for unity gain for balanced audio. Should it be required to handle unbalanced signals,it
is possible to use an adaptor XLR to RCA cable where the negative phase pin of the XLR is grounded.
Should it required to add more audio distribution to the LTM-4100 it is advised that the LAIRD LTM-ADA6 be used to provide a equal quality balanced signal distribution capability.
When using a PC for serial control, a standard 9-pin male to female cable may be used up to distances of 100 feet.
Programmers who wish to write their own control code may contact Laird Telemedia Technical Support at 845-339-9555, Monday - Friday, 10AM to
4PM EST.
4x1 Selective Switcher
After power up,the unit will parade the entire bank of switch LEDs.This is a self diagnostic which when completed indicates that the unit is ready
to operate.Connect all the required cables to the unit’s rear panel. The input source signal must be connected to connectors mark ed “INPUT”. The
output signals must be connected to connectors marked “OUTPUT”. Please pay careful attention to the nomenclature of the rear pan el. It is clearly marked for ease of connections.
RS422 Switching Section
The RS422 section is a single 4x1 switcher. Select which machine is needed for RS422 control. Be aware that despite the fact that the LTM-4100 can
handle a total of 12 devices for video(all 3 formats), and 4 devices for audio, the RS422 section is designed for only 4 devices.Therefore, select the
four devices which need RS422 control and plug the 9-pin cables into the corresponding port on the rear panel. Plug the RS422 controlling device
(editor NLE) into the RS422 I/O port. The front panel switches also control the RS422 switching as a “secondary priority protocol”. This will be
explained below.
Tagging RS422
As discussed previously, there is only one 4x1 RS422 section. This means that only 4 machines at any time can be assigned RS422 control to the
controlling device. Select the machines which require RS422 and plug their 9pin Dsubs into the similarly marked numbered position to match the
machine. Example: VTR#1 Component has RS422, VTR#2 Component has RS422, VTR#3 YC has RS422, VTR#4 YC has RS422. Now connect The
RS422 for VTR#1 to 9pinDsub#1,VTR#2 to 9pin#2,VTR#3 to 9pinDsub#3,VTR#4 to 9pin Dsub#4. Now the front panel control switches will work as
follows: The first press will enable the primary function:switching Video(component-YC-composite) and Balanced audio as a 4x1 switcher. Pressing
the button the second time will tag the RS422 connected to that port. Pressing the button a third time clears the switch and disables all signals.
In the event all four VTRs are used and they all have RS422,then the RS422 feature is now dedicated to the Component VTRs and are not available
for any other device. If any other switch is pressed twice, the RS422 will switch away and treat that switch as priority. Likewise if that switch is
pressed on a different platform switch bank, then that bank and that number will take priority.
Balanced Audio Switching
The LTM-4100 is equipped with a 4x1 dual channel balanced audio switcher. You may choose which signal needs audio and correspond that output
with audio. The LTM-4100 does not have audio for every video format,since that would require 12 channels of audio. However, since every video
feed does not require audio,you can pick and choose where complimentary audio is required and connect it accordingly.
SWITCHER
OPERATION
OPERATIONAL NOTES
Page 6
LTM-4100
Multiformat 4x1 Selective Switcher
(Component, Y/C, Composite, Balanced Audio, RS422)
800-898-0759 • 845-339-9555 • 2000 Sterling Road • Mount Marion, NY 12456 • www.lairdtelemedia.com
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The diagrams below illustrate some typical examples of the LTM-4100 operating in switch mode. Diagram 1-A shows an
editing system’s input being selected to any one of four VTRS . Diagram 1-B shows VTR’s input being selected to v arious program sources.
LTM-4100 IN 4X1 SWITCHER
MODE
LTM-4100
Control Room 1
Control Room 2
LTM-4100
Diagram 1-A
Diagram 1-B
NLE
Page 7
LTM-4100
Multiformat 4x1 Selective Switcher
(Component, Y/C, Composite, Balanced Audio, RS422)
800-898-0759 • 845-339-9555 • 2000 Sterling Road • Mount Marion, NY 12456 • www.lairdtelemedia.com
- Page 4 -
The diagrams below illustrate some typical examples of the LTM-4100 operating in standard switching mode.
LTM-4100 IN STANDARD
MODE
Diagram 1-C
VHS Hi-Fi
CH 3 1:15
PM
POWER
VHS Hi-Fi
CH 3 1:15
POWER
PM
VHS Hi-Fi
CH 3 1:15
POWER
VHS Hi-Fi
CH 3 1:15
PM
PM
POWER
PM
VHS Hi-Fi
POWER
CH 3 1:15
Page 8
LTM-4100
Multiformat 4x1 Selective Switcher
(Component, Y/C, Composite, Balanced Audio, RS422)
800-898-0759 • 845-339-9555 • 2000 Sterling Road • Mount Marion, NY 12456 • www.lairdtelemedia.com
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Component Video (R-Y, B-Y) (YUV) Switches
YC Video Switches
Composite Video Switches
Balanced Audio Switches
Component Video Input (use provided 7-Pin to breakout cables)
Y/C Video Input
Composite Video Input
Balanced Audio Input (use provided 15-Pin breakout cables)
Component Video Output (use provided 7-Pin to BNC breakout
cables)
Y/C Video Output
Composite Video Output
RS422 Machine Control
RS422 Machine Control I/O
RS232 Computer Control Serial Input
RS232 Computer Control Serial Looped Output
Utility Port
Balanced Audio Output
(use provided 15-Pin D-Sub breakout cable)
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
1
5
2 3 4
12
6 7 8 9 10 11
13 14 16 1715
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LTM-4100
Multiformat 4x1 Selective Switcher
(Component, Y/C, Composite, Balanced Audio, RS422)
800-898-0759 • 845-339-9555 • 2000 Sterling Road • Mount Marion, NY 12456 • www.lairdtelemedia.com
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SPECIFICATIONS
VIDEO: 4 Component: R-Y, B-Y, Y:7-Pin Female Connector
(7-Pin Male to 3 BNC breakout cable provided)
4 YC Video:(4-Pin)
4 Composite Video:True 75Ω BNC connectors
AUDIO 4 Dual Channel Balanced (15-Pin D-Sub Connector - D-Sub to XLR Breakout Cable Provided)
CONTROL: 4 RS422 serial control-full duplex (each device)
UTILITY PORT: 1 9-Pin D-Sub: Male: Controls External Modules
UTILITY: 1 9-Pin port for controlling external modules
SERIAL CONTROL: RS232 external serial control: Control device by included Windows software (Device can also be controlled by
your own control software - download & test control software at our web site.All LTM RS232 controlled products are embedded with an "IDENTITY" code which can be addressed by the Windows software.)
SERIAL LOOP: Looped RS232 buffered output of all RS232 signals.
Video Specifications
VIDEO PERFORMANCE: Measured with a 40 IRE 3.58Mhz sine wave a linear ramp 0-100 IRE
BANDWIDTH: 70Mhz unity gain bandwidth
RESPONSE: DC - 100Mhz overall; DC - 70Mhz Baseband @ +
0.05dB
TILT: < 0.5%
OVERSHOOT: < 0.15%
DC OFFSET: 0V @ 1Vp-p into 75 ohm
DIFFERENTIAL GAIN: 0.01%
DIFFERENTIAL PHASE: 0.05%
ADJ. CROSSTALK: -65dB tested @ 10Mhz
Audio Specifications
AUDIO PERFORMANCE: Measured with 1KHz 1.2Vp-p sine wave (balanced audio)
FREQUENCY RESPONSE: 10-60KHz ±0.1dB
S/N RATIO: 85dB,at specified tested center frequency for response
DISTORTION: < 0.05%
CROSSTALK: > 110dB isolation
ENCLOSURE INFORMATION
POWER: 110/220V AC 50/60 Hz @ .5amps,Auto Switching
DIMENSIONS: 3.5”H x 7”D x 19”W EIA Rackmount
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