AMS 1000 User Manual (Revision 03) AMS_ib_Rev03 Ib Rev03

User Manual: 1000-AMS_ib_Rev03

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Revision 03
10x1 Video + Audio Passive Switcher
User Manual
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Revision 03
10x1 VIDEO + AUDIO PASSIVE SWITCHER
Revision History:
Revision Date By Change Description Applicable to:
00 17/09/2001 SH Original Issue. All
01 08/07/2002 AL Link paths updated. All
02 09/05/2014 AL Handbook reformatted to updated look. All
03 21/09/2015 AL Upgraded to I.R.T. Communications company name. All
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Revision 03
USER MANUAL
Table of Contents:
Section Page
Revision History 2
Operational Safety 4
General Description 5
Technical Specifications 6
Circuit Description 7
Installation 8
Front and Rear Panel Connector Diagrams 9
Maintenance & Storage 10
Warranty & Service 10
This instruction book applies to all units.
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OPERATIONAL SAFETY
WARNING
Operation of electronic equipment involves the use of voltages and currents that
may be dangerous to human life. Note that under certain conditions dangerous
potentials may exist in some circuits when power controls are in the OFF position.
Maintenance personnel should observe all safety regulations.
Do not make any adjustments inside equipment with power ON unless proper
precautions are observed. All internal adjustments should only be made by suitably
qualified personnel. All operational adjustments are available externally without
the need for removing covers or use of extender cards.
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GENERAL DESCRIPTION
The AMS-1000 is a passive 10 x 1 video and audio switcher intended for use in non-critical switching and
monitoring applications.
Inputs are selected by switches, which are mechanically interlocked. A white flag indicator clearly shows the
selected switch from a distance without the need for power.
Video: All non-selected video sources are terminated in 75 Ω. The selected video input is switched through to the
output and must be terminated at the destination.
Audio: The audio consists of two identical circuits for each switch position. These may be designated as a pair for
balanced operation or as Left and Right channels for unbalanced stereo operation.
All audio lines are loaded with 10 KΩ at the input. The selected pair is connected to the output connector and the
total loading will be that of the destination in parallel with the switcher loading.
The switcher is housed in an IRT one rack unit (480 x 230 x 44 mm), 19” rack mounting chassis with video
connections via BNC connectors and audio via plug-in terminal blocks.
Applications:
•
Monitoring of slave machines in dubbing suites
.
•
Patchbay replacement
.
BLOCK DIAGRAM AMS-1000 SIGNAL PATH
75Ω
Video In 1
Audio In 1A
Audio In 1
B
Video Out
Inputs 2 to 9
Interlocking
allows
selection of
one input
only
Video In 10
Audio In 10A
Audio In 1
0
B
10
K
Ω
10
K
Ω
10
K
Ω
10
K
Ω
75
Ω
Typical application of AMS-1000 in dubbing suite
Master VCR
VHS 1
VDA & ADA
VHS 2
VHS 3
VHS 4
VHS 5
VHS 6
VHS 7
VHS 8
VHS 9
VHS 10
AMS-1000
Picture & Sound
Monitors
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Revision 03
TECHNICAL SPECIFICATIONS
Video inputs:
Number 10.
Type 75 Ω terminated when not selected.
Terminated by output load when selected.
Video output:
Number 1.
Type Directly connected to selected input.
Open circuit if no input selected.
Audio inputs:
Number 10 x 2.
Type 10 kΩ terminated when not selected.
Impedance determined by load when selected.
May be wired as balanced pairs or as stereo unbalanced pairs.
Audio output:
Number 1.
Type Directly connected to selected input.
Open circuit if no input selected.
Connectors:
Video BNC.
Audio Phoenix plug-in screw blocks.
Other:
Power Requirements Nil – totally passive.
Mechanical Suitable for mounting in standard 19" rack, with input and output connections
on the rear panel.
Finish Grey enamel, silk-screened black lettering & red IRT logo.
Dimensions 480 x 230 x 44 mm.
Supplied accessories Matching audio connectors.
Due to our policy of continuing development, these specifications are subject to change without notice.
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CIRCUIT DESCRIPTION
The input of the AMS-1000 is comprised of 10 BNC connector type video inputs and 10 balanced line inputs (these
may also be configured to 10 stereo unbalanced inputs.)
The video inputs are terminated in 75 Ω when not selected, when selected the video input is terminated by the
output load.
The audio inputs are switched through the same bank of switches as the video inputs. These consist of 2 identical
circuits for each position. Each audio line input is terminated with a 10 kΩ resistor to ground. When selected the
input is terminated with it’s 10 kΩ resistor in parallel with the output load.
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INSTALLATION
Handling:
The AMS-1000 has no specific handling requirements
When individual modules are stored no specific storage requirements are recommended.
Power:
The AMS-1000 being totally passive has no power requirements.
Earthing:
There is no earth system built into the AMS-1000. This is being due to the unit not having any active components
installed.
For shielding reasons the AMS-1000 should be earthed to the rack the unit has been installed in. If the AMS-1000
has not been installed into a racking system a technical earth should be attached to the chassis to help with
shielding considerations
Mounting:
The AMS-1000 is a 1 RU box that slots straight into your standard racking system. There are no adjustments to be
made to this unit.
Once you have installed the unit into your rack, connect the cables to the appropriate connectors.
Audio Connections:
The AMS-1000 can handle either Unbalanced Stereo or Balanced Mono Audio connections.
The appropriate wiring configurations can be found in the diagrams below.
1
2
3
-
+
Gnd
Balanced line → XLR Connector
Unbalanced Stereo → RCA Connectors
-
+
Gnd
L
R
2 x RCA
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Front and Rear Panel Connector Diagrams
The following front panel and rear assembly drawings are not to scale and are intended to show relative positions
of connectors, indicators and controls only.
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Revision 03
MAINTENANCE & STORAGE
Maintenance:
No regular maintenance is required.
Care however should be taken to ensure that all connectors are kept clean and free from contamination of any
kind. This is especially important in fibre optic equipment where cleanliness of optical connections is critical to
performance.
Storage:
If the equipment is not to be used for an extended period, it is recommended the whole unit be placed in a sealed
plastic bag to prevent dust contamination. In areas of high humidity a suitably sized bag of silica gel should be
included to deter corrosion.
Where individual circuit cards are stored, they should be placed in antistatic bags. Proper antistatic procedures
should be followed when inserting or removing cards from these bags.
WARRANTY & SERVICE
Equipment is covered by a limited warranty period of three years from date of first delivery unless contrary
conditions apply under a particular contract of supply. For situations when “No Fault Found” for repairs, a
minimum charge of 1 hour’s labour, at IRT’s current labour charge rate, will apply, whether the equipment is
within the warranty period or not.
Equipment warranty is limited to faults attributable to defects in original design or manufacture. Warranty on
components shall be extended by IRT only to the extent obtainable from the component supplier.
Equipment return:
Before arranging service, ensure that the fault is in the unit to be serviced and not in associated equipment. If
possible, confirm this by substitution.
Before returning equipment contact should be made with IRT or your local agent to determine whether the
equipment can be serviced in the field or should be returned for repair.
The equipment should be properly packed for return observing antistatic procedures.
The following information should accompany the unit to be returned:
1. A fault report should be included indicating the nature of the fault
2. The operating conditions under which the fault initially occurred.
3. Any additional information, which may be of assistance in fault location and remedy.
4. A contact name and telephone and fax numbers.
5. Details of payment method for items not covered by warranty.
6. Full return address.
7. For situations when “No Fault Found” for repairs, a minimum charge of 1 hour’s labour will apply,
whether the equipment is within the warranty period or not. Contact IRT for current hourly rate.
Please note that all freight charges are the responsibility of the customer.
The equipment should be returned to the agent who originally supplied the equipment or, where this is not
possible, to IRT directly. Details of IRT’s direct address can be found at I.R.T. Communications’ website.
Web address: www.irtcommunications.com
Email: sales@irtcommunications.com

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