OT: NTSC mode on PXWX70?

rs170a wrote on 1/26/2016, 12:51 PM
I'm trying to help out a (technically clueless) friend who just bought this camera (in Canada at a very reputable shop if that matters).
When we were going through the menu, the only AVCHD record modes were for PAL (i.e. 50i or 50p), nothing for NTSC (60i or 60p).
I've downloaded the manual and have been going through it but haven't found anything yet that will let me change it to NTSC.
Any help is gratefully appreciated.

EDIT: Ignore the above request. Pouring through the manual for the 3rd time showed me what needed.



Musicvid wrote on 6/1/2019, 12:32 AM

My goodness, Mike.

It's nice to see you back again! Yet another real techie joins the fray.

vkmast wrote on 6/1/2019, 2:55 AM

@Musicvid +1. Mike the @rs170a was just back here.

Musicvid wrote on 6/1/2019, 3:38 AM

I know him as a kind and patient mentor, but it took me years to figure out his handle Glad to see another old friend back in town.

rs170a wrote on 6/1/2019, 7:11 AM

Thanks guys. I had completely forgotten about this post.
Musicvid, I've been doing very little work (and consequently very little posting anywhere) with Vegas since I retired almost 3 years ago from our local community college. I do a bit of shooting and editing on a project for the college retirees association but still use Vegas 12. Got an old 3/4" deck and have been archiving some of our old (20+ years) material for posterity. VidCap and Vegas to the rescue 😀
Thanks for your mentor comment. Pretty sure I learned as much if not more from you than you did from me.
Yeah, folks that weren't trained in the tech side of broadcasting would never get my handle. As I recall only one other guy did and he was a broadcast engineer so he should know what it meant 😁


Musicvid wrote on 6/1/2019, 7:50 AM


I came into the game later than you, so my familiarity begins with my fascination with all things teevee when we got our first rural broadcasts in 1958. Zorro, Mr. Greenjeans, and The Beav come to mind. I played the obligatory role of local nerd (often called "village idiot") back then

My limited understanding is that RS170a is an earlier EIA standard that is basically a predecessor to NTSC, is that anywhere close to being correct? Did it actually sync at true 60Hz? Must have been a nightmare.

Dexcon wrote on 6/1/2019, 8:24 AM

From the fantastic Google machine, RS170a was the first generation of NTSC color. From a long ago memory (which could well be wrong so many decades later), the USA first transmitted color TV in 1948, but it wasn't until 1963 that color TV sets in use in the USA reached 1 million.

@Musicvid … TV in the 50s/60s was so good - the Westerns, Den the Men, H5-0, Twilight Zone, Bewitched, Jeannie, so many police series, etc etc. I don't live in the past, but I have so many great memories of the past.

rs170a wrote on 6/2/2019, 8:27 AM

@Musicvid and @Dexcon, yes, rs170a replaced rs170 when colour came into the NTSC picture. I had the colour frequency (3.579545 Mhz or 3.58 for short) drilled into my head in college when we were studying the various components of the video signal. I have no idea why but that's the way it was back then 🙂
For more info, this is a decent (and short) article I found.
FYI the "rs" in rs 170 and rs170 (and several others as well) is short for "recommended standard".


Musicvid wrote on 6/3/2019, 8:46 AM

From Mike's link:

RS-170A Twenty years after the drafting of RS-170, the EIA video signal standard proposal RS-170A evolved into what is known today as the NTSC composite video signal. RS-170A specifies timing of scans (essentially the same as RS-170: 15.732 KHz horizontal and 59.94 Hz vertical) and blanking as well as the 3.58 MHz burst required to decode the colour signals. As adopted by the FCC for broadcast use, the standards are precisely adhered to and carry the force of law. For non-broadcast use, EIA standards are merely recommendations and are not enforced. Specifications referring to RS-170A do not necessarily mean the signals are broadcast standard.

RS-170A or National Television System Committee (NTSC) standard color is composite video; all of the information required to reproduce the display is enclosed on a single channel. The NTSC signal is used for television in the United States and Japan. When color television was introduced, video formats were constrained by the Federal Communications Commision (FCC) to be compatible with the installed base of RS-170 black and white sets, and available electronics technology limited the band width usable for signal encoding. Consequently, NTSC video incorporates a "subcarrier" for encoding color; color information is phase encoded by a lower frequency chrominance signal superimposed on the luminance signal.

Read more at: http://www.epanorama.net/documents/video/rs170.html

I've always learned from you, Mike. Now, I've learned from just your online name. 😉