Saga of the Hayes Ultra vs NOISE .......... Part 1 12-25-91 Well, I received an Ultra for Christmas. Gee, can't wait to try it. Hmmm, it didn't work. I tried and tried, but it only worked once or twice. 01-02-91 to 07-17-91 Sent it back to Hayes several times and they found nothing wrong. In April, the Ultra started working from 5:00 PM to 10:00 PM. A friend brought his USR Dual-standard to my house. IT WORKED ALL THE TIME ! In late May, the Ultra started working from 7:00 AM to 11:00 PM. I called the phone company and they came by to check. Seems that I have a bad case of "A.C. Hum" on the lines. They will try to correct it. OK, that is the problem, but the USR worked! I called Hayes again and suggested they come to my house since I live about 15 minutes away from their Corp. office. I told them that they needed to check their modem in the REAL world. NO LUCK! "Oh, you have line noise"! Wrote a letter to Dennis Hayes and also posted a message in National ECHOed conferences about the modem not working. 10 days later I receive a phone call FROM an engineer at Hayes: "WE WILL BE GLAD TO COME AND CHECK-OUT YOUR PROBLEM". The following is what happened when the Hayes engineers came to my house. * * * * * * * * * * * * * * * * * * * * * * * * * * * Saga of the Hayes Ultra vs NOISE ........... Part 2 07-18-91 Well, Hayes sent 2 engineers over to my house last night. They arrived about 9:30 PM. Then they setup their spectrum analyzer and other test gear and did some calling. All went well and my Ultra connected everytime. We called AV-Sync, a board about 15 minutes in another direction, and the Hayes support BBS, plus a few others. At 11:00 PM the bottom fell out. Electrical noise jumped in as if it was staged. The Ultra would not connect to anything faster than 300 baud. They tried and tried until I suggested that they try the USR Dual Standard that THEY brought with them. T H E Y D I D . . . & . . . I T W O R K E D ! Now they are REALLY interested. I heard alot of talk (before they tried the USR) about "Boy this is really bad 60 Hz. harmonic noise." We took a picture with a SCOPE camera and they are going to bring in their best guru's to work on it. If they can get the Ultra to talk thru this, I think they will finially have a good product. Maybe then it can become a modem one can depend on. For those interested, the noise was as follows: Please note that this is from memory (Hayes has the picture). Before 11:00 P.M. ================= 50 45 40 35 30 | | 25 | | | | 20 | | | | | | | | 15 | | | | | | | | | | 10 | | | | | | | | | | | | 5 | | | | | | | | | | | | 0 ___________________________________________________________________ 0 60 120 180 240 300 360 420 480 540 600 660 720 780 <-- Hz. --> After 11:00 P.M. ================ 50 45 | | | | 40 | | | | | | | | | | | 35 | | | | | | | | | | | | | | | | 30 | | | | | | | | | | | | | | | | | | | | | 25 | | | | | | | | | | | | | | | | | | | | | | | 20 | | | | | | | | | | | | | | | | | | | | | | | | 15 | | | | | | | | | | | | | | | | | | | | | | | | 10 | | | | | | | | | | | | | | | | | | | | | | | | 5 | | | | | | | | | | | | | | | | | | | | | | | | 0 | | | | | | | | | | | | ___________________________________________________________________ 0 60 120 180 240 300 360 420 480 540 600 660 720 780 <-- Hz. --> Please note that before 11:00 P.M. it was every other harmonic and that after 11:00 P.M. it was every harmonic of 60 Hz. John Rice (Sysop) Lanta Systems BBS (404) 451-0202