Neo-Geo AES Monitor Compatibility Assessment

JROK NTSC encoder PCB

Neo-Geo AES serial number 17521.

JROK 4.1 TV encoder board installed in parallel with existing Neo-Geo AES TV encoder.

JROK encoder intercepts existing RGB, composite sync, 5V lines.

Addition of JROK encoder reduces brightness from original Neo-Geo composite video cable. Presumably this is caused by extra capacitive load; disconnecting the JROK encoder inputs fixes this problem.

JROK encoder suffers from unstable horizontal sync, visible from composite and S-video connectors as horizontal waviness or "dot crawl" type patterns.

Neo-Geo CD has built-in S-video that does not suffer the same problem.

01-22-2012

TV	EXAMPLES	JROK composite	JROK S-video	JROK component video
Panasonic CT-27624A (2000 CRT)		wavy	wavy	n/a
Samsung LT-P1545P (2005 LCD)		untested	good	no sync
Samsung TV (2009 LCD)		wavy	n/a	no sync
Mitsubishi TV (2006 LCD)		untested	wavy	untested
Dell u3011t monitor (LCD)		n/a	n/a	stationary noise; monitor also insists it is 288p PAL
Dell 3008wfpt monitor (LCD)	horizontal crawl example	wavy	right half screen OK, left half has doubled lines	no sync; monitor insists it is out of range
Dell 2001fp monitor (LCD)	S-video jitter example	very wavy, jittery	tolerable; some jitter	n/a
LG monitor (LCD)		wavy	good	no sync
Sony studio grade CRT monitor (CRT)		untested	good	untested
Vizio TV (LCD)	S-video jitter example S-video jitter example 2	untested	tolerable; some jitter; visible scan lines suggest it is interpreting 240p as 480i	no sync; shows noise