Positive Modulation

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Positive Modulation

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colly0410

Senior Transmitter Engineer

Posts: 328
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Location: Hucknall notts.

#9

25-04-2018, 03:07 PM

I suppose mean level AGC & pure AC coupling really messed with the black level & contrast. I have a 625 single standard Elizabethan 12 inches portable from the early 70's & the black level is all over the place so presume AC coupling, not sure if mean level or sync tip AGC though. Did any single standard 625 TV's use mean level AGC?

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Messages In This Thread

Positive Modulation - by pwdrive - 22-10-2017, 08:11 AM

RE: Positive Modulation - by ppppenguin - 22-10-2017, 08:48 AM

RE: Positive Modulation - by pwdrive - 22-10-2017, 01:34 PM

RE: Positive Modulation - by Synchrodyne - 31-10-2017, 03:43 AM

RE: Positive Modulation - by ppppenguin - 31-10-2017, 07:24 AM

RE: Positive Modulation - by Murphyv310 - 31-10-2017, 08:22 AM

RE: Positive Modulation - by colly0410 - 31-10-2017, 02:49 PM

RE: Positive Modulation - by Murphyv310 - 31-10-2017, 03:11 PM

RE: Positive Modulation - by colly0410 - 25-04-2018, 03:07 PM

RE: Positive Modulation - by ppppenguin - 25-04-2018, 03:20 PM

RE: Positive Modulation - by colly0410 - 26-01-2020, 06:14 PM

RE: Positive Modulation - by ppppenguin - 26-01-2020, 07:30 PM

RE: Positive Modulation - by Kalee20 - 29-01-2020, 12:54 PM

RE: Positive Modulation - by Mike Watterson - 29-01-2020, 01:48 PM

RE: Positive Modulation - by pwdrive - 29-01-2020, 02:13 PM

RE: Positive Modulation - by ppppenguin - 29-01-2020, 03:21 PM

RE: Positive Modulation - by Kalee20 - 29-01-2020, 06:27 PM

RE: Positive Modulation - by ppppenguin - 29-01-2020, 04:30 PM

RE: Positive Modulation - by colly0410 - 29-01-2020, 11:46 PM

RE: Positive Modulation - by ppppenguin - 30-01-2020, 07:38 AM

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