Lindy CPU IP Access Switch Plus Setting the Threshold manually, Phase, Contrast

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Video settings

This dialog provides access to all of the key video settings that determine image quality and link performance.

Setting the Threshold manually

Occasionally it can be useful to manually adjust the Threshold setting, such as when there is a KVM switch OSD banner that cannot be easily removed from the

Phase

The phase setting adjusts the alignment of the host video output and the remote system video display to achieve the sharpest image.

Horizontal position Determines the horizontal position of the host screen image within the viewer window.

Threshold

The threshold is effectively a noise filter that differentiates between valid video signals and background noise or inteference. This has the effect of reducing unnecessary video signals between the CPU IP and the remote system, thus improving performance.

display.

1Use the ‘Calibrate all’ function to ensure that all other settings are optimised.

2Click the Threshold left arrow button to decrement the setting by one and observe the Display activity indicator.

3Repeat step 2 until the Display activity indicator suddenly rises to a much higher level (i.e. 50%). This will mean that you have reached the noise boundary. At this point, increment the Threshold value by 2 or 3 points to achieve an optimum setting.

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Vertical position

Colour, brightness &

Calibrate all

Display activity

Determines the

contrast

Click to

Indicates the level

vertical position

Provides an automatic

determine the

of video activity

of the host screen

setting button to

optimum settings

currently in

image within the

optimise these three

for all aspects of

progress.

viewer window.

important video

video the video

 

 

constituents for the

connection from

 

 

current host and

the host system.

 

 

connection speed.

 

 

All settings can be individually subjected to an auto configuration (click the appropriate ‘Auto’ button) and most can also be manually adjusted.

Use the ‘Calibrate all’ button to automatically determine the optimum settings for all items.

Note: Before using the Calibrate all option, ensure that there are no on-screen display elements generated by any connected KVM switch (such as a host name label or menu). Due to the differing video rates of these items compared to the video image from the host itself this can confuse the calibration process into giving a much higher Threshold rate than is necessary, thus worsening the screen artefacts.

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Contents CPU IP Access Switch Plus Contents Index Modem/ISDN port Four simultaneous remote usersLocal user IP network/InternetCPU IP Access Switch Plus features front and rear What’s in the box What you may additionally need CD-ROMDouble unit rack brackets MountingSingle unit rack brackets  Host computer or KVM switch ConnectionsTo connect a local keyboard, video monitor and mouse Local keyboard, video monitor and mouseIP network port To connect the IP network portModem/ISDN port Power supply connectionTo connect the power supply To connect a modem or Isdn portPower control port To connect and address the switch boxesPart 1 Local configuration Initial configurationPart 1 Local configuration Part 2 Remote configurationTime and Date To perform the initial local configurationAdmin password EncryptionViewer encryption settings Encryption settingsCPU IP encryption settings EncryptionHot plugging and mouse restoration Which restore setting do I use?To restore mouse operation when hot plugging Recognising an IntelliMouse-style mouseCPU IP does not display the configuration sequence Resetting the configurationCPU IP asks for an unknown admin password To invoke a configuration reset by main menuPart 2 Remote configuration To perform the remote configurationPositioning CPU IP in the network Networking issuesPort settings Placing CPU IP behind a router or firewallDNS addressing AddressingTo discover a DHCP-allocated IP address Firewall/router addressPlacing CPU IP alongside the firewall Ensuring sufficient securityPorts To configure the power sequences for each host computer Power switching configurationPower control sequences Power OffPerforming a flash upgrade Important Wait until the upgrade is completeTo make a local connection Connecting to the CPU IPLocal connection To view the local control menuRemote connections To avoid the ‘hall of mirrors’ effectRemote connection by VNC viewer To connect using the VNC viewerTo connect using your Web browser Remote connection by Web browserUsing the viewer window When using the viewer windowMenu bar Host selection ConfigureMouse pointers To select a hostAuto calibrate Access mode shared/privatePower control Re-synchronise mouseControls Contrast Setting the Threshold manuallyPhase  Connecting via dial up modem or Isdn link Downloading VNC viewer from the CPU IPIf you need to enter a port number Windows Viewer encryption settingsSupported web browsers LinuxTroubleshooting Getting assistanceAppendix 1 Local configuration menus To access the local configuration menusUnit configuration Network configuration Modem configuration Reset configuration To reset the CPU IP configurationClear IP access control What is IP access control?To clear IP access control Auto select Appendix 2 VNC viewer connection optionsColour/Encoding Preferred encodingInputs MiscSave as defaults DefaultsReload defaults Save configuration file asAppendix 3 VNC viewer window options Appendix 4 Browser viewer options Encoding and colour levelSecurity Appendix 5 Remote configuration menus To access the remote configuration menusMain configuration menu Logged on users User accounts Firmware Version Screensaver timeoutHardware Version Host Keyboard LayoutProtocol timeout Advanced unit configurationIdle timeout Force VNC protocolIP access control IP network maskIP gateway To reorder access control entries Setting IP access controlTo define a new IP access control entry To edit/remove access control entriesSerial port configuration Power control portModem port Host configuration To create a new host entryOccurred Click to clear All log entries Refresh Logging and statusTo copy and paste the log ListAppendix 6 Addresses, masks and ports IP addressesNet masks Binary equivalent Net masks the binary explanationInside a bit-wise and function Binary octet afterAll locations Calculating the mask for IP access controlSingle locations Address rangesSecurity issues with ports Ports4pin RJ10 Appendix 7 Cable and connector specifications6pin mini-DIN 9pin D-type FemaleAppendix 8 Hotkey sequence codes Safety information Other products in the CPU Switch rangeWarranty Safety considerations when using power switches with CPU IPRadio Frequency Energy European EMC directive 89/336/EECFCC Compliance Statement United States USA Germany France ItaliaIndex 