ADDERView USB Manual

							AdderView USBInstallation and UsePage 203.3 Switching between computers using the AdderView
When you select a new computer using the AdderView, the peripherals that were
connected to the old computer will be disconnected and allocated to the new
computer regardless of whether they are currently servicing jobs on the old
computer. For example, if you are printing from the old computer and you switch to a
new computer before the print job is complete then only part of your print job will
actually be printed.
In particular you should avoid switching computers whilst a computer isreading or writing data to a USB data storage device such as a ZIP drive.Where practical it is adviseable to eject removable disks on USB drives beforeswitching computers.3.4 Status display
The status display usually shows the currently selected port. If autoscan mode is
selected, the segments will illuminate in sequence in a clockwise direction
interspersed with a display of the currently selected channel. If the AdderView is
waiting for the enumeration guard process to complete then the display will flash.
Data flow from the mouse or keyboard attached to the PS/2 style keyboard and
mouse ports (model AV4USB-PC only) causes the dot in the lower right hand corner
of the display to flash. 
						

							AdderView USBInstallation and UsePage 213.5 Keyboard hotkey control (model AV4USB-PC only)
The AdderView may be conveniently controlled by pressing keyboard hotkey
combinations on the keyboard attached to the PS/2 style keyboard port (see figure
4). All of the hotkey control commands are invoked by holding down the two hotkeys
and then pressing a command key. By default, the two hotkeys are ‘CTRL’ and
‘ALT’, although other combinations can be selected (see section 2.4.4). Once the
hotkey command has been activated you will need to release the hotkeys and the
command key before a new hotkey command is accepted by the AdderView.
HOTKEYs + TAB is an exception and this allows you to tab through the ports by
holding down the hotkeys and repeatedly pressing TAB. 
						

							AdderView USBInstallation and UsePage 22The hotkey command are summarised below (note that the numbers on the numeric
keypad do not form part of a valid hotkey) :
‘HOTKEYs’ and ‘1’ - selects channel 1
‘HOTKEYs’ and ‘2’ - selects channel 2
‘HOTKEYs’ and ‘3’ - selects channel 3
‘HOTKEYs’ and ‘4’ - selects channel 4
‘HOTKEYs’ and ‘TAB’ - selects the next channel. The next channel may be the next
active channel or the next channel in numerical sequence depending upon the
position of option switch 8 (see section 2.4.3).
‘HOTKEYs’ and ‘A’ - selects autoscan mode where each channel’s video is
displayed for the selected time (see section 2.4.2). To cancel autoscan mode simply
select any fixed channel either by hotkey or by using the front panel button.
‘HOTKEYs’ and ‘0’ – switches off the video signal and displays 0. This will cause
some monitors to go into standby mode or switch off. The video signal can be re-
enabled by selecting a channel.
Examples of common hotkey sequences (assuming CTRL + ALT hotkey option):
To select channel 2:
pressba ba
2 2release 2 2ba ba
To tab through channels:
pressba ba
 v v
 release v v
 pressv v
release v v
 pressv v
release vba vba 
						

							AdderView USBInstallation and UsePage 233.6 Mouse control (model AV4USB-PC only)
The AdderView’s channels may be changed using a three button mouse or
IntelliMouse. In order to switch to the next channel simply hold down the central
mouse button or wheel button and click on the left hand mouse button. The channel
will then change to the next channel. The next channel may be the next active
channel or the next channel in numerical sequence depending on the setting of
option switch 8 (see section 2.4.3).
3.7 Autoscan mode
Autoscan mode may be selected by holding the front panel key down for 5 seconds
or by using the keyboard hotkeys. When autoscan mode has been activated the
front panel display will alternately show a rotating segment and the currently
selected channel. The video from each computer will be displayed for the time
period selected by option switch 7 (either 2 seconds or 5 seconds). During autoscan
all the USB peripherals remain disconnected and only the video signals are switched
through. Depending upon the position of option switch 8, the AdderView will lock-on
to all the computer ports or just the active computer ports.
Many modern monitors are fitted with automatic power save relays and willswitch off after a few seconds if connected to an inactive PC. If you are usingsuch a monitor you must not scan inactive ports. Constant switching on andoff of your monitors relay will eventually damage your monitor.3.8 The optional remote controller
An optional remote controller is available which replicates the front panel key and
display, but can be located remotely from the AdderView. The remote controller
plugs into the options port on the back of the AdderView (see figures 1 and 2). This
remote controller is particularly useful in applications where the AdderView is located
away from the user’s desktop. The remote controller can be conveniently attached to
your keyboard with a couple of Velcro strips to give instant channel information and
key control. The key and display on the remote controller perform exactly the same
function as the key and display on the front panel of the AdderView. The remote
controller is supplied with a 3 metre cable but this may be extended if necessary to
20 metres. 
						

							AdderView USBInstallation and UsePage 243.9 Querying the AdderView’s firmware version
For technical support reasons it may sometimes be desirable to know the firmware
version of your AdderView. If the front panel key is held down whilst the AdderView
is powered on then the firmware version will be displayed as a sequence of numbers
and characters. The three digits of the firmware version are shown in sequence on
the 7-segment display, one at a time, alternating with the letter F. When the firmware
version has been displayed the AdderView will display and equals sign and resume
normal operation. For example the following sequence would indicate firmware
version 1.23.
F  1  F  2  F  3  = F  1  F  2  F  3  =
3.10 PC and Macintosh keyboard equivalent key mappings
If you are connecting a mixture of IBM compatible PCs and Macintosh computers to
the AdderView USB then you have several possible keyboard configuration options.
You may decide to connect both a Macintosh and PC style keyboard to the
AdderView and use the appropriate keyboard for the appropriate system.
Alternatively you may wish to use the same keyboard to control both systems. In this
case we recommend that you use a PC 104/105-key keyboard. This has more keys
than the Macintosh keyboard and so is more suited to universal use.
The equivalent key mappings on the IBM PC 104/105 –key keyboard and the Apple
keyboard are shown in the following table:
IBM 104/105-keyApple keyboard
keyboard
Left CtrlLeft Control
Left Win Start ()Left Command ()
Left AltLeft Option (alt)
Right Alt or Alt GraphRight Option (alt)
Right Win Start ()Right Command ()
Right CtrlRight Control
Windows Application ()No equivalent
No equivalentOn / off key 
						

							AdderView USBInstallation and UsePage 25Appendix A.  Cable specificationsShielded cables must be used with this equipment to maintain compliancewith radio frequency energy emission regulations and ensure a suitably highlevel of immunity to electromagnetic disturbances.A1. USB cables
The construction and maximum length of USB cables is specified in the USB
standard. You should only use cables that conform to this USB standard. These
cables will be shielded and no longer than 5 metres in length. USB cables have
different types of connectors at each end to avoid incorrect connection.
USB peripherals that carry integral cables, such as some keyboards and mice may
be connected directly to the AdderView or may be connected to the AdderView via a
USB hub (see figure 4). USB hubs may be used to extend the overall USB cable run
beyond the 5 metre limit.
A2. Video cables
You will require a video cable for each computer that you wish to connect. The
AdderView uses standard video cables that are terminated at each end with a
standard 15-way high density D-type male video connector. All the pins on the cable
are connected straight through.
We strongly recommend that you use tri-coax 75 ohm video cables that are
specifically designed to carry video signals. Good quality 10 metre long tri-coax
video cables show little loss of video quality. Lengths up to 30 metres long will
usually give an acceptable video picture although the quality falls off as the length
increases. You should therefore generally use the minimum length possible.
Tri-coax video cables can easily be identified as they are roughly the same thickness
as a monitor’s video cable and are usually lightly fluted on the outside. Cheaper and
thinner ‘data’ cables are widely available but are only suitable for low video
resolutions. Where possible these cheaper cables should be avoided. 
						

							AdderView USBInstallation and UsePage 26Your monitor will plug directly into the back of the AdderView, however if you wish to
extend the distance between the AdderView and the monitor then you may use a tri-
coax video extension cable. This cable should preferably be no longer than 10
metres although cable runs up to 20 metres long may also give acceptable video
quality.
A3. PS/2 style keyboard and mouse extension cables
PS/2 style keyboards and mice will plug directly into the AdderView USB model
AV4USB-PC. If required the keyboard and mouse may be located further away from
the AdderView with the aid of extension cables. Extension cables should be
terminated with 6 pin mini-DIN PS/2 style connectors, with a male connector on one
end and a female connector on the other end. All pins on the extension cable should
be wired straight through (1 to 1, 2 to 2, 3 to 3 etc.). Such extension cables may be
up to 10 metres long. Most keyboards and mice will also work with a 20 metre
extension cable.
A4. Remote controller extension cables
The remote controller is supplied as standard with a 3 metre long lead. This distance
may be extended with the use of suitable shielded extension cable. This extension
cable may be up to 20 metres long and should be wired so that all pins are
connected straight through (1 to 1, 2 to 2, 3 to 3 etc.). Remote controllers with longer
leads are also available from your supplier. 
						

							AdderView USBInstallation and UsePage 27Appendix B.Problem SolvingProblem:
Peripherals hang after the AdderView’s channel is changed.
Action:
Ensure that you are using a suitable operating system (see section 2.1). Operating
systems such as versions of Mac OS earlier than 8.6 are known to have associated
problems. Ensure that you are not reading from or writing to USB connected disk
drives whilst you are switching between computers. Ensure that the enumeration
guard time is longer than the longest observed enumeration delay (see section
2.4.1) or ensure that you are not switching between computers during the
enumeration process.
Problem:
Video is fuzzy or smudged.
Action:
Ensure that you are using high quality tri-coax video cables. These can be easily
identified as they are roughly the same thickness as a monitor’s video cable and
often are lightly fluted on the outside of the cable. Use the minimum possible length
of video cables.
Problem:
The on/off key on a Macintosh keyboard doesn’t work.
Action:
Ensure that you have plugged the keyboard into port A and that there are not any
USB hubs connected between the computer and the AdderView.
Problem:
The enumeration delay time seems too long.
Action:
Set the lowest enumeration guard time and remember not to switch away from a
selected computer until the timer or hourglass indicates the end of the enumeration
process. 
						

							AdderView USBInstallation and UsePage 28Notes 
						

							AdderView USBInstallation and UsePage 29Notes