OK, I should've read this message before I replied... My Bad!! Nance Nancy Shackelford ----- Please check out my store...Something for everyone! www.nk-shouseofstuff.biz ----- Original Message ----- From: "H & C Arnold" <4carolyna@xxxxxxxxxxxxxx> To: <optacon-l@xxxxxxxxxxxxx> Sent: Monday, February 13, 2012 5:54 PM Subject: [optacon-l] Re: Reading LCD monitor with the Optacon > Well, Nancy, it's me again. I went into Alt T, not in a message, but > outside > the list of them in a box. I arrowed up once until Options. When there, > you > tab across the categories, and hit Control Tab for a new Tab; the first is > General. I think about the fourth Control Tab took me to Font. > > In God We Trust, > > Carolyn > ----- Original Message ----- > From: "Nancy Shackelford" <ladym74731@xxxxxxxxxxxxxxxx> > To: <optacon-l@xxxxxxxxxxxxx> > Sent: Monday, February 13, 2012 12:01 PM > Subject: [optacon-l] Re: Reading LCD monitor with the Optacon > > > I shall try this. Thanks. > > Nance > > > Nancy Shackelford > ----- Please check out my store...Something for everyone! > www.nk-shouseofstuff.biz > ----- Original Message ----- > From: "Mary Emerson" <maryemerson@xxxxxxxxxxxxx> > To: <optacon-l@xxxxxxxxxxxxx> > Sent: Monday, February 13, 2012 8:21 AM > Subject: [optacon-l] Re: Reading LCD monitor with the Optacon > > >> Nancy and list, >> >> Maybe you need to adjust the brightness setting on the CRT display >> itself; turn down brightness. Sometimes low brightness and high contrast >> work; sometimes low contrast and high brightness work. Also, there are >> various ways to adjust the CRT lens itself; try unscrewing the top of >> the lens to make it longer, instead of screwing it all the way down into >> the lens barrel. Remember, TSI developed at least two types of CRT >> lenses, one for CRT screens with larger print, and another for CRTs with >> smaller print. >> >> Below, I'm adding the instructions that were included with the CRT lens >> for larger print CRTs. If you have an R1D or R1C optacon, the CRT lens >> was supposed to work in inverse mode. If you have an optacon 2, adjust >> the mode slide switch either in the lowest or highest position; the >> middle position is normal, if I recall correctly, and not often used >> with a CRT lens. If inverse won't work, use normal mode; Windows often >> has dark colors on a light screen. >> >> Here, starting in the next paragraph, are the instructions. Maybe this >> information will help somebody else on the list, too. >> >> TELESENSORY SYSTEMS, INC. >> >> 3408 Hillview Avenue >> >> P.O. Box 10099 >> >> Palo Alto, California 94304 >> >> Telephone 415/493-2626 Telex 348352 >> >> OPERATING INSTRUCTIONS FOR CRT LENS’* MODULE F1A >> >> INTRODUCTION >> >> The CRT Lens Module F1A is an Optacon accessory that may be attached to >> the retina of >> a Model R1C/D Optacon to read some Cathode ray Tube terminals. There are >> numerous >> variations in CRT’s including those which are supposedly identical, >> which mean that >> one’s own Optacon, the F1A CRT Lens Module, and the specific CRT in >> question must >> be evaluated together to determine if an effective reading system can be >> achieved. >> >> Although the CRT Lens Module is designed to read characters 1/8 to >> 1/4 inch (3 to 6 mm) tall, there are significant variables which prevent >> TSI from >> consistently predicting which CRT’s are readable. These include the >> brightness and >> contrast of the CRT display, the focus adjustment of the CRT, and >> presence of a dust >> cover with its underlying CRT tube curvature, extraneous light from the >> surrounding >> room, the refresh rate of the CRT, and the ratio of character height to >> width. >> >> FEATURES OF F1A ..’-. - ..--. >> >> The bayonet sleeve which accepts the Optacon retina is on the back side >> of the F1A at the >> end closest to the user and furthest from the CRT screen during use. The >> front end of the >> F1A contains three small nylon ball bearings which are positioned >> directly against the >> CRT ^ screen during use. The features below are described in a sequence >> from back to >> front. >> >> Bayonet sleeve - accepts the Optacon retina which is inserted with a >> push/twist action. >> >> Zoom lens magnification adjustment - The zoom lens adjustment ring is at >> the back of the >> F1A barrel, just before the barrel makes a right angle turn to the >> bayonet sleeve. The ring >> has a larger diameter than the barrel. It slides forward and backward >> approximately 1/4 >> inch (6 mm) with the forward position providing the greatest >> magnification. The ring can >> be locked into position from its ”free-sliding” position by twisting it” >> either clockwise or >> counter-clockwise relative to to the barrel. >> >> Focus adjustment - Focus is adjusted by varying the length of the >> barrel. About 3/4 >> inch (19 mm) forward from the zoom ring are two smaller knurled rings >> having the same >> diameter as the barrel. The forward ring is attached to the front half >> of the barrel. >> Turning it adjusts barrel length. The second ring (toward the back) is a >> lock ring. A flat >> side on the circumference of the barrel just forward of the two >> focus adjustment rings provides a tactile monitor of the number of turns >> made while >> adjusting barrel length. .^Eleven complete turns will adjust the barrel >> from minimum to >> maximum length. ^ ’ >> >> Light shield - The two inch (51 mm) diameter disk near the front of the >> F1A is designed >> to shield the CRT from extraneous light. In some situations, this shield >> may be >> unnecessary. It can be unscrewed from the barrel and removed after >> separating the barrel >> in two by completely unscrewing the front ^ section beyond its maximum >> extension. >> >> Nylon ball bearings - Provide smooth, low-friction movement of the F1A >> across both >> glass screens and protective dust covers. >> >> SET-UP PROCEDURES >> >> Preliminaries: >> >> The sighted CRT user will generally prefer a very strong contrast >> between the characters >> and the background. This is usually not ideal for the Optacon. The >> Optacon generally >> works best when the CRT is very bright, in which case the contrast may >> be low. In other >> words, both the characters and the background are usually bright when >> CRT adjustments >> are optimum for Optacon reading. Frequently the best CRT brightness >> and/or contrast >> settings will result in the appearance of retrace lines on the screen. >> >> Preliminary to evaluating the F1A, one could ask a sighted assistant to >> adjust the CRT >> brightness and/or contrast controls (if present) to yield characters and >> background as >> bright as possible without significantly distorting character focus. >> >> Next, use the chart below to make an initial focus (barrel-length) >> adjustment. This >> adjustment will be based upon two factors: (1) F1A’s are >> factory-adjusted at TSI to >> various internal lens settings, and (2) CRT’s come with or without cover >> screens. >> >> NOTE: For best results with a CRT with cover screen, the screen should >> be removed. If >> the screen is not removed, you may not be able to read some parameter >> information. >> >> CRT Without Cover CRT With Cover ’., Screen ’ Screen’ >> >> F1A Lens Setting No. 4 9 complete turns 9 complete turns (reads larger >> print) >> from minimum. - from ’minimum >> >> F1A Lens Setting No. 7 4 complete turns 1 complete turn^’ (reads smaller >> print) >> from minimum from minimum >> >> Remove the standard lens module from the Op’tacon retina module and set >> it aside in a >> safe place. , >> >> Adjust the zoom ring to minimum magnification by unlocking it, sliding >> it back toward >> the bayonet sleeve as far as possible, and relocking it. >> >> Now, hold the F1A against the CRT screen. If your Optacon is designed >> for left index >> finger reading, turn the F1A until the bayonet sleeve (which accepts the >> retina) points left. >> (If your Optacon is designed for right index finger reading, the bayonet >> sleeve should >> point right.) Holding the F1A this way, insert the retina module into >> the F1A bayonet >> sleeve so that the camera cord emerges from the 12 o’clock position. >> >> CRT Light Adjustments: >> >> The following procedures are designed to determine whether the CRT emits >> enough light >> for the Optacon to operate properly. ’” >> >> 1. Both the CRT and the Optacon should be on, with the >> Optacon’s normal/invert switch in the invert position. >> >> 2. Aim the F1A at a blank screen or blank portion of the dis- >> play previously adjusted by a sighted assistant. >> >> 3. Turn the Optacon’s threshold counterclockwise until the array >> ”blooms”. (Namely, all >> of the pins are vibrating.) Then back off by turning the threshold >> clockwise until the >> bloom just disappears. >> >> 4. Display a line of ”L’s”across the screen. >> >> 5. Leaving the Optacon threshold at the setting in Step 3, scan the >> ”L’s”. If the Optacon >> responds, proceed with >> F1A focus adjustments in the next section . If the Optacon does not >> respond, increase >> CRT contrast and repeat steps >> 2-5.” If the Optacon still does not react to print with any of the CRT >> contrast adjustments >> you have made, the F1A you are using is probably not receiving enough >> light from your >> CRT’s screen and probably will not work with your equipment. Try >> evaluating an F1A >> with a different factory-adjusted lens setting (if you have one >> available), starting again with ”Preliminaries”. >> >> Note: If the ”L’s” appear upside down, remove the retina module from the >> F1A, rotate it >> 180° and replace it. >> >> F1A Focus Adjustments: ’ >> >> Ignore image size and leave magnification at a minimum with the zoom >> ring all >> the way back (toward you) . Try to improve focus by using various barrel >> lengths, adjusting Optacon threshold after each barrel length adjustment >> to >> determine if the image is becoming clearer. Try to find the barrel length >> adjustment which will provide the best average focus for characters >> appearing in >> both the corners and the center of the portion of the CRT screen that >> you will >> want to read. >> >> Magnification Adjustment: . >> >> Using the zoom ring and Optacon’s threshold adjustment, adjust >> magnification. >> When the magnification is adjusted to provide the correct image size, >> the focus >> may require readjustment, especially if your F1A has lens setting Number >> 4. ” >> >> Improving CRT Light Adjustments: >> >> Assuming that previous adjustments were properly made, the F1A should >> require >> no further focus or magnification adjustments. Next, you want to >> determine >> whether any additional adjustments to the CRT’s intensity and/or >> contrast controls >> result in clearer images for the Optacon. . -..- , -,. >> >> Before attempting to improve the CRT’s light adjustments, note the ; >> Optacon’s >> threshold setting and ask a sighted assistant to note the starting point >> CRT intensity >> and/or contrast settings. Now, without adjusting the F1A, determine >> whether >> variations in the Optacon threshold adjustments and the CRT intensity >> and contrast >> adjustments provide improved images. If not, return to the settings in >> use at the >> beginning of this section. Make note of these settings so that next time >> you use >> this CRT, you will have some way of quickly making the proper settings. >> >> The above instructions assume that the CRT has brightness and contrast >> controls. >> Not all CRT’s do. Some have a single brightness control which >> simultaneously >> adjusts intensity and ’contrast. Others have no ” external controls. If >> you cannot >> make the exact adjustment suggested, do the best you can within the >> limitations of >> your system. >> >> You may notice a beat frequency or periodic pulsation in your Optacon’s >> array >> when reading the CRT screen. This is due to the fact that some CRT >> screens >> renew their images at a different rate than the Optacon views them. The >> Optacon >> camera’s scan rate has been adjusted to the average refresh rate of the >> most >> popular CRT’s. This may not be an | exact synchronization with your CRT. >> This >> electronic incompatibility ’ does not damage your Optacon in any way. >> >> Some CRT cover screens are quite flexible. As a result, you may discover >> that a >> character is in focus when you are applying very little pressure against >> the screen >> and out of focus when you apply enough pressure to bend the screen >> inward. >> Performance may be improved by removing the cover screen, if it is >> possible and >> safe to do so. >> >> 3a0 >> >> to view the list archives, go to: >> >> www.freelists.org/archives/optacon-l >> >> To unsubscribe at any time, just send a message to: >> >> optacon-l-request@xxxxxxxxxxxxx with the word "unsubscribe" (without the >> quotes) in the message subject. >> >> Tell your friends about the list. They can subscribe by sending a >> message >> to: >> >> optacon-l-request@xxxxxxxxxxxxx with the word "subscribe" (without the >> quotes) in the message subject. >> > > to view the list archives, go to: > > www.freelists.org/archives/optacon-l > > To unsubscribe at any time, just send a message to: > > optacon-l-request@xxxxxxxxxxxxx with the word "unsubscribe" (without the > quotes) in the message subject. > > Tell your friends about the list. They can subscribe by sending a message > to: > > optacon-l-request@xxxxxxxxxxxxx with the word "subscribe" (without the > quotes) in the message subject. > > to view the list archives, go to: > > www.freelists.org/archives/optacon-l > > To unsubscribe at any time, just send a message to: > > optacon-l-request@xxxxxxxxxxxxx with the word "unsubscribe" (without the > quotes) in the message subject. > > Tell your friends about the list. They can subscribe by sending a message > to: > > optacon-l-request@xxxxxxxxxxxxx with the word "subscribe" (without the > quotes) in the message subject. > to view the list archives, go to: www.freelists.org/archives/optacon-l To unsubscribe at any time, just send a message to: optacon-l-request@xxxxxxxxxxxxx with the word "unsubscribe" (without the quotes) in the message subject. Tell your friends about the list. They can subscribe by sending a message to: optacon-l-request@xxxxxxxxxxxxx with the word "subscribe" (without the quotes) in the message subject.