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CTX Monitors FAQ

What does the BNC/D-SUB - EXIT button do?

This button acts as a dual function button. When using a monitor equipped with BNC connectors you have the option of using two video input sources. This button acts as a toggle between the BNC and D-SUB input source. Also when the ODS function has been invoked this button acts as the "EXIT" feature when you're done making your adjustments.

Apple Macintosh Issues

Most CTX monitors (1462, 1562, 1565, 1765, and 1785) require an adaptor before they will work with Apple Macintosh computers, this adaptor is available from CTX. The 1760 and 1560 both come with reversible cables, so these do not require the adaptor.

Also note that an 14" Monitors made before 1994 are not Macintosh compatible. The first 14" monitor to be Macintosh compatible was the 1462 (though this does require an adaptor, see above).

The maximum resolution that the 1760LR will achieve on an Apple Macintosh is 640X480.

1760DF - Saving Settings

  • Go into the program # representing the setting you wish to erase.
  • Disconnect the signal cable.
  • Make a size adjustment for about 5 seconds, then wait for twenty seconds without using any input devices.
  • Reconnect the signal cable.
  • Turn off monitor, then turn it back on.

1760/1560/1460 - Erasing Program Numbers

In DOS at the C: Prompt, select the program number which you want to erase, then unplug the monitor signal cable. Press the up or down button for 5 seconds on the Analog Control. Re-connect the signal cable after 20 seconds, turn the monitor off, then turn the monitor on.

The following are preset modes:

  • 0 - IBM VGA-350 640x350
  • 1 - IBM VGA-400 640x400
  • 2 - IBM VGA 480(PS/2) 640x480
  • 3 - VESA 800x600/56 800x600
  • 4 - IBM 8514A 1024x768
  • 5 - VESA 1024x768/60 1024x768 NI
  • 6 - VESA 1024x768/70 1024x768 NI
  • 7 - VESA 800x600/60 800x600
  • 8 - VESA 800x600/72 800x600
  • 9 - VESA VGA/84 640x350
  • 10 - Custom Use --
  • 11 - VESA VGA/84 640x400
  • 12 - VESA VGA/72 640x480
  • 13 - MAC-II 640x480
  • 14 - 64KHz 1280x1024

Note : Memory location 14 is only for 1760.

1560LR and 1280 x 1024 resolution

The 1560LR is only capable of a 1280 x 1024 resolution when in interlaced mode, which can cause undesirable flicker and is therefore not recommended.

5468NI and Paradise Video Card

If the Paradise video card you are using is capable of 72Hz at 640 x 480, change it to run at 72Hz.

1765 Product Differences

The main differences between the 1765GM, the 1765GMe, and the 1765CD, are as follows. The 1765GM casing is grey, its signal cable is detachable, and it has a BNC connector. The 1765GMe is beige, its signal cable is captive, and it doesn't have a BNC connector. The 1765CD controls are located in the open and lack trapezoid and rotation controls.

Maximum Viewable Area

  • 1451C/CLR -- 13"
  • 1562CLR/1565D -- 14"
  • 1765GM/GMe/CD -- 16"
  • 1785GM/GMe/GMD -- 16"
  • 2085 -- 18.7"

Maximum Resolution

Here are max resolution guidelines for some CTX monitors. For best overall results, use the recommended graphics modes listed in your monitor's user's manual.

  • 1451C/CLR - 1024 x 768 60Hz non-interlaced
  • 1562CLR - 1024 x 768 60Hz non-interlaced
  • 1565D - 1280 x 1024 60Hz non-interlaced
  • 1765GM/GMe/CD - 1280 x 1024 60Hz non-interlaced
  • 1785GM/GMe/GMD - 1600 x 1200 60Hz non-interlaced
  • 2085 - 1600 x 1200 60Hz non-interlaced
  • 2185 - 1600 x 1200 60Hz non-interlaced

What Does the Moire adjustment option do?

Moire is an undesirable pattern of wavy lines that shows up on the screen. It is electronic noise that can be coming from the circuits inside the monitor or from the video card. It is very unpredictable since it could happen only on a specific resolution, frequency, or size of the image, or on any combination of the above. The "Moire" control on the monitor will reduce this electronic noise pattern.

What Does the Degauss function do?

This button adjusts the monitor to correct changes in the surrounding magnetic field. This magnetic field may cause a color problem on part of the screen and it may be due to internal or external interference. To correct the problem, press the "Degauss" button on the monitor's front panel and move away from the monitor any external magnetic generator.

Monitor Makes a Snapping/Clicking Noise During Startup

Monitors typically automatically degauss at startup often resulting in a snapping noise which can be followed by a clicking noise. This is due to the monitor switching into video mode after degaussing.

Horizontal Lines Displayed Across New Monitor

Some monitors, such as the CTX PR500, PR700, PR710 AND PR711 use a technology called "aperture-grille" that uses vertical phosphor stripes, instead of dots, to yield sharper images and brighter colors. Aperture-grille technology uses horizontal stabilizing wires which can be seen as fine lines across the screen on bright images. The visible horizontal stabilizing wires are a normal characteristic of all aperture-grille monitors.

No Input Signal Message

This is the monitor's way of informing you it is not receiving a signal from the video card. Normally this happens when the Monitor's power saving feature kicks in, and can be cleared by moving the mouse or pressing the Enter key on the keyboard. If this doesn't clear the problem, check that the monitor cable is plugged in correctly and that the computer is switched on. Finally you may need to reseat the graphics card.

Out of Range Message

The monitor displays this message when your video card has been set to send either a horizontal or vertical scanning frequency to the monitor which is out of the range of that monitor. The scanning frequency of a monitor varies from model to model. Please consult the specifications page in the users manual to determine the monitors' frequency range. Once this is done, set the horizontal and vertical scanning frequency on the video card to a number within the monitors' display capabilities and once again an image will be displayed on the screen.