iView-3500STB Tuner & DVR Owners Thread - Page 169 - AVS Forum | Home Theater Discussions And Reviews
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post #5041 of 5185 Old 05-25-2017, 12:02 PM
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Looks like iView posted NEW firmware updates for the 3500STBII (with NO Ch. 3/4 switch) and 3200STB dated 5/24/17

File name(s):

IVIEW-3500STBII_Support QAM PSIP
IVIEW-3200STB_Support QAM PSIP


Serial Number:

1506/1508/1509/1511/1601/1603/1706

Size:

5.5MB


No description found.
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Last edited by QAM; 05-25-2017 at 12:06 PM.
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post #5042 of 5185 Old 05-25-2017, 01:49 PM
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From the filenames, I suspect these new firmware updates may help cable users like ncsercs.
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post #5043 of 5185 Old 05-29-2017, 07:40 PM
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I just tried the new 3200STB firmware. While it does work in an OTA environment, it appears to be intended for cable users only.

It replaces the channel/subchannel numbers with the iView's internal number (the number displayed on the front panel). IOW, instead of 68-5, I now see 089 (since channel 68-5 is the 89'th channel in my channel list), and I have to enter 89 to tune to it

While this is probably friendlier than the seemingly random RF channel and program numbers cable users saw on earlier firmware, it is definitely not an improvement for OTA users! I will be reverting my 3200 to the previously-installed firmware.

Edit: I just noticed another fairly new firmware version on the 3200 page: version "1604" dated 03/24/2017. Unfortunately this does the same thing as the 05/24/2017 version, except the first channel is 002 instead of 001

Last edited by JHBrandt; 05-29-2017 at 07:54 PM.
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post #5044 of 5185 Old 05-30-2017, 12:48 AM
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JH .. I have acquired a used 3500stbii that performs well. Sadly, the unit reboots randomly losing my custom channel listings order and arranges the stations numerically by LCN number. I have to goto Menu:Program Edit and manually rearrange channel numbers to restore my custom order. Any ideas why this is happening?

SW version 2014 0707 V3 (Also tried SW ver 2014 05 22 V1 with same issue .. had hope V3 might resolve, but no luck)
HW ATSC 7816 XD 03 Z00 (with 3/4 switch)
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post #5045 of 5185 Old 05-30-2017, 07:30 AM
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Well, I'm pretty sure it's another bug. Unfortunately V3 is the latest firmware for that box; AFAIK no one is working on firmware for the 7816 boxes any more.

The only workaround I know of is to delete the channel(s) that cause the box to reboot, or just live with the default channel order. Not really satisfactory, I know.

I think V4.1 HomeWorX firmware is compatible with those boxes and might not have this bug, but I don't have a copy of that version, I don't know who might, you'd have to use a HomeWorX remote, and it hasn't been tested in any case.
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post #5046 of 5185 Old 05-30-2017, 09:28 AM
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Quote:
Originally Posted by JHBrandt View Post
I just tried the new 3200STB firmware. While it does work in an OTA environment, it appears to be intended for cable users only.

It replaces the channel/subchannel numbers with the iView's internal number (the number displayed on the front panel). IOW, instead of 68-5, I now see 089 (since channel 68-5 is the 89'th channel in my channel list), and I have to enter 89 to tune to it

While this is probably friendlier than the seemingly random RF channel and program numbers cable users saw on earlier firmware, it is definitely not an improvement for OTA users! I will be reverting my 3200 to the previously-installed firmware.

Tried the 3500II firmware with my box and confirm what JHBrandt experienced with his 3200STB. Unfortunately, tried the hospital cable input and no channels were found

Nick

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days I've stayed alive. - George Carlin - 1996
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post #5047 of 5185 Old 05-30-2017, 12:38 PM
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Quote:
Originally Posted by QAM View Post
Looks like iView posted NEW firmware updates for the 3500STBII (with NO Ch. 3/4 switch) and 3200STB dated 5/24/17

File name(s):

IVIEW-3500STBII_Support QAM PSIP
IVIEW-3200STB_Support QAM PSIP


Serial Number:

1506/1508/1509/1511/1601/1603/1706
Wonder how come they have "1706" serial numbers in there? That is generally the year/month of manufacture, but June 2017 hasn't arrived yet Is iView planning to make/sell a new batch of boxes next month with this firmware pre-installed? If so, will they be labeled for (some) cable use only? OTA users won't accept tuning by iView's internal channel numbers.

Sometimes I get the impression these folks don't really know what they're doing
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post #5048 of 5185 Old 05-30-2017, 07:26 PM
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Quote:
Originally Posted by JHBrandt View Post
Edit: I just noticed another fairly new firmware version on the 3200 page: version "1604" dated 03/24/2017. Unfortunately this does the same thing as the 05/24/2017 version, except the first channel is 002 instead of 001
Hmm...good eye... did some checking and noticed that the folder inside the zip file is labeled in Chinese. Here is the original text:

7802ATSC美国-英语-IVIEW-LOGO-默认ypbpr输出-频道号002显示-关闭后台更新-左上角添加SIPSI信息

And here is the Google Translation:

7802ATSC United States - English - IVIEW-LOGO - default ypbpr output - channel number 002 display - close background update - add SIPSI information in upper left corner

Looks like it's as you say, starts at channel 2 plus some SIPSI info and ypbpr output. Huh?!?

Given your experience , I won't be updating my 3200STB with the 1604 firmware. Thanks.
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post #5049 of 5185 Old 05-30-2017, 08:00 PM
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Good work! The folder name just looked like unreadable garbage on my PC - it (and I) didn't recognize it as Chinese characters, I guess because I don't have any Chinese fonts installed. I never would have thought to run it through Google translate. Looks like that provides at least a tiny bit of documentation.

The .zip file at the following link has a similar unreadable folder name: http://www.iviewus.com/download/firm...STBII_1604.zip. Think you could translate it too?

Hmm; "default ypbpr output?" That's another term for the component output of the 3500. The 3200 doesn't have component though, so that's sort of puzzling.

"Channel number 002 display" is self-explanatory, although I have no idea why anyone felt they needed firmware that started channel numbers at 002, especially since the numbers are meaningless sequential numbers anyway.

No idea what "close background update" means.

"SIPSI information in upper left corner?" I saw that; when changing channels, it showed the channel name, number, and a third piece of info I can't recall in a box in the upper left corner. Would have been kind of nice - if the channel number had been the standard OTA channel-subchannel number insteand of the iView internal number.

Not sure what they think "SIPSI" means though. Googling "SIPSI" just turned up a Turkish woodwind instrument and a French acronym for a Web-based service about posting labor inspections.
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post #5050 of 5185 Old 05-31-2017, 07:17 AM
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Quote:
Originally Posted by JHBrandt View Post

The .zip file at the following link has a similar unreadable folder name: http://www.iviewus.com/download/firm...STBII_1604.zip. Think you could translate it too?
the Google translation is:

7802ATSC United States - English - IVIEW-LOGO-Open modulation interface switch - default ypbpr output - close background update -20160923V5.0-MODEL-iVIEW-3500STBII _____ 650_____
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post #5051 of 5185 Old 05-31-2017, 07:51 AM
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Thanks. Doesn't really say much different besides "Open modulation interface switch," and I have no idea what that means.
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post #5052 of 5185 Old 06-02-2017, 07:27 AM
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Quote:
Originally Posted by LH92037 View Post
JH .. I have acquired a used 3500stbii that performs well. Sadly, the unit reboots randomly losing my custom channel listings order and arranges the stations numerically by LCN number. I have to goto Menu:Program Edit and manually rearrange channel numbers to restore my custom order. Any ideas why this is happening?

SW version 2014 0707 V3 (Also tried SW ver 2014 05 22 V1 with same issue .. had hope V3 might resolve, but no luck)
HW ATSC 7816 XD 03 Z00 (with 3/4 switch)
Quote:
Originally Posted by JHBrandt View Post
Well, I'm pretty sure it's another bug. Unfortunately V3 is the latest firmware for that box; AFAIK no one is working on firmware for the 7816 boxes any more.

The only workaround I know of is to delete the channel(s) that cause the box to reboot, or just live with the default channel order. Not really satisfactory, I know.

I think V4.1 HomeWorX firmware is compatible with those boxes and might not have this bug, but I don't have a copy of that version, I don't know who might, you'd have to use a HomeWorX remote, and it hasn't been tested in any case.
More info:
Quote:
Originally Posted by oneheadlight View Post
couple things I thought I'd post here and over on the cm-7003 thread..

Definitely try and re-arrange some channels and see what happens. You're right, the 3500stb would re-scan every couple of days, more like "blink out, and rescan while it's on". Very buggy. I *HAD* rearranged the 7003's channels until last night..

This is when it got very unstable. I was watching tv, and all of a sudden the unit rebooted on its own! At first I thought I hit the power button, but that wasn't it. When it would reboot, the remote wouldn't be able to control the unit. I was being lazy, I know I could've gotten up from the sofa and unplugged it but I wanted to see what would happen. Eventually it did accept the power off button's command. But only rebooting and then I could turn it off.

It continued to do this until all the channels that were re-arranged were back into their original scanned order (by frequency block, not the channel number)! It was like a dog shaking off being wet! Removed all the customization that I wanted. Which was helpful since the cable company has the channels all over the place, nothing consecutive.

I have seen the 3500stb do this before, but luckily back then the cable company had the channels consecutive along with the frequencies.

This 7003 rebooting was a huge let down! I never had the 3500stb reboot on its own, no matter what firmware I was using. Sure, it would rescan on its own, but to continue to re-boot every 2-3 minutes (I timed it) is very odd.
I really feel it's a firmware issue, and I don't want to return it just yet until I can exhaust all the "tweaks" possible.

Has the rebooting issue re-surfaced as it did back in the day with the first batch of 3500stbII's? Or am I just "lucky"? lol..
It looks like this is a longstanding bug with both iViews and the newer Channel Master 7003 box, which is based on the same hardware and firmware. Time for some experiments I guess....
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post #5053 of 5185 Old 06-02-2017, 07:44 AM
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Quote:
Originally Posted by ncsercs View Post
Tried the 3500II firmware with my box and confirm what JHBrandt experienced with his 3200STB. Unfortunately, tried the hospital cable input and no channels were found
So I guess the new version isn't a "QAM physical" version as I hoped - it just changes what's displayed for the channel numbers, assuming it finds any
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post #5054 of 5185 Old 06-06-2017, 10:10 AM
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Quote:
Originally Posted by JHBrandt View Post
So I guess the new version isn't a "QAM physical" version as I hoped - it just changes what's displayed for the channel numbers, assuming it finds any
What's the name of the hex editor you use to edit/view the *.bin files?

What does flash.bin do?

What's the difference between flash.bin and usb_upgrade_all_flash.bin?

If I insert a USB flash drive into a box, can I get it to automatically update the FW? If so, how?

Nick

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post #5055 of 5185 Old 06-06-2017, 11:44 AM
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Quote:
Originally Posted by ncsercs View Post
What's the name of the hex editor you use to edit/view the *.bin files?
I use HxD (https://mh-nexus.de/en/hxd/). But most of the usb_upgrade_all_flash.bin file is compressed and therefore not human-readable even with a hex editor. Luckily the first 4K bytes are reserved for a Uboot script, which is readable. Here's a sample:
Code:
cusid 169b 1 1
spi_wrc 0x80001000 0 2dbd18 
setenv usb_complete 1
setenv usb_upgrade 0
setenv bootcmd ' spi_rdc 0x80b00000 0x5001c 0x28bcfb; LzmaDec 0x80b00000 0x28bcfb 0x80000180 0x81000000; go 0x80000224;
saveenv
reset
Quote:
Originally Posted by ncsercs View Post
What does flash.bin do?

What's the difference between flash.bin and usb_upgrade_all_flash.bin?
Quote:
Originally Posted by jprc View Post
The flash.bin can be deleted. It's a file only useful to the devs. I argued with iview for over a year to get them to stop including that file in the updates because it was confusing people, was useless, and I was writing endless replies to people that were trying to use it upgrade their box unsuccessfully. They finally stopped and then evidently have started again with the latest version.

You came onto the iview thread late. There were about 15 more versions you didn't have to suffer through, a couple of which completely broke everything and most of which regressed to previously fixed bugs. The only reason I still subscribe to this thread after not having an iview for a long time now is because of all the work I did (for free) for iview to get so many things fixed.
Quote:
Originally Posted by ncsercs View Post
If I insert a USB flash drive into a box, can I get it to automatically update the FW? If so, how?
Any FAT32-formatted drive (flash or spinning-platter) should work, but normally you must initiate a FW update from the menu. Automatic updates would be dangerous; it'd be too easy to plug in a drive with an incompatible firmware version and brick the box.

However your previous experience with the ViewTV box indicates that at least some firmware versions can trigger an automatic firmware update if the box is reset during boot-up:
Quote:
Originally Posted by ncsercs View Post
You're not going to believe this.....

  • Using the same USB flash drive from before with no other files
  • Put the iView FW successfully used before
  • Inserted the drive
  • Pulled the wall plug in-n-out several times until 'firmware updating' screen fired up and processed to 100%
  • Unit back to normal

Thanks for all your help!

Last edited by JHBrandt; 06-06-2017 at 11:57 AM.
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post #5056 of 5185 Old 06-07-2017, 06:15 PM
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The last Hospital cable tried with the ViewTV AT-163 with iView FW was a failure.

Just now tried a test with an actual iView described below.

Model: iVIEW-3500STBII
SW Version: 20160815 V5.0
HW Version: 7802 1237836650
Serial: 1609-3500STBII-DZ3676


Hosp Cable - Ant IN
TV Format - NTSC
Antenna Power - Off
Signal Type - Cable
Modulation - CH3_ON


Hospital Setup (as far as I know)

24 DirecTV SD (NOT HD) receivers (1 for each channel)

CABLETRONIX CT-FMM Fixed Channel Micro Modulator
http://www.cabletronix.com/pdf/ctfmm%20ct103.pdf

PICO DIGITAL PCM55SAW 550MHZ CHANNELIZED PLL SAW-FILTERED A/V MODULATOR
http://www.picodigital.com/pdf_datasheets/PCM55SAW.pdf

PICO DIGITAL PHC 24G 1GHZ BROADBAND PASSIVE HEADEND 24 CHANNEL COMBINER
http://www.picodigital.com/pdf_datasheets/PHC-24G.pdf

On paper this should have worked.
Result - Nothing scanned.

What did I miss or do wrong?
What iView/HomeworX and Firmware combo do I need?

Nick

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days I've stayed alive. - George Carlin - 1996
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post #5057 of 5185 Old 06-08-2017, 06:38 AM
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Quote:
Originally Posted by ncsercs View Post
Just now tried a test with an actual iView described below.

Model: iVIEW-3500STBII
SW Version: 20160815 V5.0
HW Version: 7802 1237836650
Serial: 1609-3500STBII-DZ3676

Nothing scanned.

What did I miss or do wrong?
What iView/HomeworX and Firmware combo do I need?
It doesn't sound like any of the "V5" versions will work. I think your best chance would be one of the older iViews that can run V1, V2, or V3 firmware, like this one:
Quote:
Originally Posted by LH92037 View Post
JH .. I have acquired a used 3500stbii that performs well.

SW version 2014 0707 V3 (Also tried SW ver 2014 05 22 V1)
HW ATSC 7816 XD 03 Z00 (with 3/4 switch)
No way to guarantee that even that one will work, but at least it has a shot.

Also no way to guarantee your newer iView would resolve his problem, but maybe the two of you can arrange an exchange to find out.
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post #5058 of 5185 Old 06-08-2017, 06:45 AM
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Quote:
Originally Posted by ncsercs View Post
Hospital Setup (as far as I know)

24 DirecTV SD (NOT HD) receivers (1 for each channel)

CABLETRONIX CT-FMM Fixed Channel Micro Modulator
http://www.cabletronix.com/pdf/ctfmm%20ct103.pdf

PICO DIGITAL PCM55SAW 550MHZ CHANNELIZED PLL SAW-FILTERED A/V MODULATOR
http://www.picodigital.com/pdf_datasheets/PCM55SAW.pdf
Uh, dude - those look like analog RF modulators, not digital ones. None of the iViews or HomeWorXes can tune analog signals. You'd need something like an old-fashioned VCR.
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post #5059 of 5185 Old 06-08-2017, 09:29 AM
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OK got it. That explains a LOT.

Short of finding a VCR, does something else exist to put between the cable and the iView to convert the analog signal to digital?

Would this work: RCA Compact RF Modulator (CRF907A)
https://www.amazon.com/RCA-Compact-R...ywords=CRF907A

Nick

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days I've stayed alive. - George Carlin - 1996

Last edited by ncsercs; 06-08-2017 at 09:53 AM.
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post #5060 of 5185 Old 06-08-2017, 01:42 PM
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No, that wouldn't work. That's just an analog RF modulator.

There are digital RF modulators, but:

  • They're very expensive (cheapest one I know of is $300)
  • They require an HDMI input, so you'd need a composite-to-HDMI converter for each one
  • And you'd need a tuner to receive the analog signals in the first place.

Basically it's not worth it. Your best bet would probably be to find a DVD recorder with a tuner and, ideally, a hard drive as well as the DVD drive (so you don't have to record to DVDs). I believe Philips or Magnavox used to make such a beast, but I can't find a thread for it here.

Another approach would be an analog tuner card for a PC. That's not a bad solution, if you don't mind dedicating a PC to become a DVR. If you decide to go that route, you can get advice over in the Home Theater Computers section of this forum: http://www.avsforum.com/forum/26-hom...ter-computers/
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post #5061 of 5185 Old 06-12-2017, 08:10 PM
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Quote:
Originally Posted by JHBrandt View Post
I discovered something interesting about entering "bare" channels with the [1511-EPGFix] firmware: If you enter a bare channel number, it first looks for a matching channel number, and if it exists it tunes to the lowest subchannel for that channel. So, if I enter 23, it tunes to 23-2 (because I've flagged 23-1 as a "skipped" channel). So far, that's pretty normal.

But here's the interesting part. If there isn't a matching channel number, it looks for a matching subchannel of the current channel and tries to tune that instead! So, let's say I'm on 30-1. If I punch in "4" it'll go to channel 4-1, because that exists; but if I punch in "3" it'll go to 30-3, because there's no 3-anything in my area, but there is a 30-3!
Upon further review, it turns out I got that second part wrong. Apparently it searches the channel list from the beginning, looking for a matching channel or subchannel number, and tunes to the first match it finds. So if you happen to have a low-numbered channel with lots of subchannels, you might not be able to tune to some channels with a "bare" channel number even with the default channel order.

This is confusing behavior and can't possibly be what was intended, so it has to be considered a bug, albeit a less severe one than the bug QAM's original firmware had. OTOH you could use it to your advantage: by reordering the channels, you can choose (to some extent) which channel gets tuned to if you enter 1, 2, etc. So you may be able to turn this bug into a "feature."

For example, with the default channel lineup, I have "one-button tuning" of these channels:

  1. 4-1 (Fox)
  2. 5-2 (Cozi)
  3. 8-3 (Justice)
  4. 4-1 (Fox)
  5. 5-1 (NBC)
  6. 18-6 (Shop LC)
  7. 18-7 (QVC2)
  8. 8-1 (ABC)
  9. 28-9 (currently a vacant channel)

Not too bad, but could be improved. 1 and 4 both go to Fox, and entering 6, 7, or 9 results in less-than-compelling programming. Unfortunately I don't have an abundance of choices for 6, 7, or 9 (I've noticed the higher the subchannel number gets, the less interesting the programming gets) but I can at least move CBS (11-1) up to the top of the list; now entering 1 gets me to CBS (11 still works too), but nothing else changes.

One little annoyance is that if I manually rescan a channel, everything gets sorted back into the default channel order, and I have to move CBS up again. Luckily this firmware version doesn't seem to suffer much from the channel rescan bug that afflicted so many earlier firmware versions, so as long as I don't manually rescan a channel, CBS seems to "stick" at the top.

Last edited by JHBrandt; 07-19-2017 at 07:49 PM.
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post #5062 of 5185 Old 06-13-2017, 03:18 PM
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Quote:
Originally Posted by JHBrandt View Post
I use HxD (https://mh-nexus.de/en/hxd/). But most of the usb_upgrade_all_flash.bin file is compressed and therefore not human-readable even with a hex editor. Luckily the first 4K bytes are reserved for a Uboot script, which is readable. Here's a sample:
Code:
cusid 169b 1 1
spi_wrc 0x80001000 0 2dbd18 
setenv usb_complete 1
setenv usb_upgrade 0
setenv bootcmd ' spi_rdc 0x80b00000 0x5001c 0x28bcfb; LzmaDec 0x80b00000 0x28bcfb 0x80000180 0x81000000; go 0x80000224;
saveenv
reset
Any FAT32-formatted drive (flash or spinning-platter) should work, but normally you must initiate a FW update from the menu. Automatic updates would be dangerous; it'd be too easy to plug in a drive with an incompatible firmware version and brick the box.
I'm willing to take the risk. It may even help other people who've bricked their boxes.

I'm thinking the answer might be to edit the Uboot script.

This is what I've found so far: http://mstar.wikia.com/wiki/Firmware_update

Nick

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post #5063 of 5185 Old 06-13-2017, 09:23 PM
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You misunderstand; I wasn't trying to talk you out of automatic updates! I was saying that because automatic updates would be dangerous, the iView developers decided not to provide for them in the first place. There's no "hidden option" to enable them, at least none that I know of.

The Uboot script in the first 4K of the usb_upgrade_all_flash.bin file is run when you do a firmware update. It verifies the file's checksum, copies the updated firmware (except the first 4K) to flash memory, then sets up boot commands to decompress the firmware into RAM and start it. Finally it reboots the box (reset command), causing those boot commands to run.

Because most of the firmware is compressed, it takes more than just HxD to view it. You need to copy the compressed portion to a separate file and decompress it first.

I suppose in theory you could make changes to the firmware, recompress it, calculate a new checksum, write a new boot script, and flash your iView with your own "custom" firmware. But that's way beyond my level of knowledge, even for the simplest changes.

The big problem with the iView firmware update process is that there's no compatibility info in the firmware files. You can flash any valid firmware file, even if it was written for a different SoC, demod chip, tuner, etc. That's how folks usually brick their boxes.

The site you found is good. There's even a page on "debricking" there, although you need to hook a terminal up to the iView's internal serial port. It's beyond my expertise, but some folks know how to pull it off. For more hardware info, search this thread for posts by user "Satpro." They're old but still helpful.
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post #5064 of 5185 Old 06-14-2017, 08:26 PM
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256 GB flash & iView 3500-STBII

Sorry, I don't know how to post this correctly.
I bought a SanDisk 256 GB flash drive to use with my iView 3500-STBII. I needed more space than the 128 GB SanDisk flash drives I had been using. They are all 3.0. The recordings on the new 256 GB drive are choppy, with lots of tiling [not sure if that's the correct term]. I notice the 256 GB drive has a frame rate of 30 Hz and scans at 1920 x 1080, while the 128 GB is 60 Hz, 1920 x 1080.
I bought another 256 GB flash drive [2.0/3.0] and it also does not work, nor did reformatting the flash drives to NTFS as iView CS claimed]. The 128 GB flash drives still work fine, and are FAT32 format. Please advise, and guide me if this needs to be reposted.
I don't know much about this stuff. Thanks!
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post #5065 of 5185 Old 06-15-2017, 05:17 AM
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256 GB flash & iView 3500-STBII [more info]

I have already applied the 2016 firmware update, and all my flash drives are Sandisks.
I have emailed iView several times, and followed all their suggestions:
1. use a 2.0 flash drive
2. reformat flash drive to NTFS
3. apply the firmware update

Since I notified them none of these actions solved the choppy/tiling problem, iView has stopped responding to me.
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post #5066 of 5185 Old 06-15-2017, 06:51 AM
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As usual iView support doesn't have a clue. Using a 2.0 flash drive won't help. In fact, it would probably be even slower, which would make things worse. Changing the firmware won't help either.

Reformatting may help, if you do it on a PC (not on the iView itself) and choose a large cluster size. It won't make a huge difference but it's probably worth a try.
Quote:
Originally Posted by 7558037 View Post
You should be fine using a flash drive that's fast enough for HD recording.

Trouble is that most flash drive makers don't seem to want you to know how SLOW their drives are. Typically, the larger the capacity of the flash drive the faster it writes (read speeds are always faster than write speed, but they're not as important as write speed).

Write speed is very important to assure our HD files are being faithfully and completely written to the drive we're using. This requires a write speed at least as fast as a typ. HDD, or 125MB/s. Without a good write we can see bad playback w/o realizing it's caused by a poorly written HD file.

Here's a help file on this subject JFTHOI:

Worried about "slow" FT drives? Best FT drives for DVRs will be larger-capacity USB 3.0 drives (128+GB), which are *designed* for faster reading/writing than smaller-capacity models from same mfgr. This can prevent the playback-stuttering-while-recording reported on other DVRs. Here's a good comparison chart that might make your research easier? Look for write speed at least faster than 125MB/s, the typ min. write speed of HDDs. Beware of sellers who show only read speed, which is always (much) higher and not nearly as important as write speed for our recorders.

All depends on the type of flash memory inside, e.g., the Samsung 840 model in that report was not a great performer due to its use of TLC flash but its new 850 models for 2017 (up to 4TB) will be using 2-bit NAND MLC and have 470-520MB/s write speed(!).
I'm surprised and disappointed that Samsung's 256GB drives don't perform better than their 128GB drives. Perhaps you bought one of the 840 models mentioned above? Edit: Forget that. I reread your post and see that you have Sandisk, not Samsung, flash drives. Too many similar-sounding brand names

OTOH I've also noticed the iView tends to slow down somewhat as drives get bigger, so if the 256GB drives are the same speed as the 128GB ones, maybe that phenomenon pushed it back over the edge again
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post #5067 of 5185 Old 06-15-2017, 07:09 AM
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Quote:
Originally Posted by Nikko_9 View Post
I notice the 256 GB drive has a frame rate of 30 Hz and scans at 1920 x 1080, while the 128 GB is 60 Hz, 1920 x 1080.
Actually, frame rate is a property of the video you're recording, not the drive - and I don't know how you got 60Hz at that resolution (unless perhaps you recorded something from cable TV). Over-the-air HD broadcasts are either 720p60 (60 Hz @ 1280 x 720) or 1080i30 (30 Hz @ 1920 x 1080). The TV station chooses which of those formats to broadcast.

If the recordings on the 128 GB drive are 720p60, that may account for the difference. 720p60 video is usually a bit smaller than 1080i30, so your drives may be able to keep up with 720p60 but not with 1080i30.
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post #5068 of 5185 Old 06-15-2017, 08:16 AM
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256 GB flash & iView 3500-STBII

I am recording OTA broadcasts only, and wrote down the info displayed by the iView for frame rates, etc.
I used a friend's Windows 10 pc to reformat the 256GB 2.0/3.0 flash drive to NTFS. I did a Quick Format because the other option seemed like it would take hours!
Today I can use a friend's Win 7 pc, but I don't know how to adjust the cluster size. Can you advise, if it's not too complicated?
BTW, I stopped using Windows machines years ago, and only have OS X and Android machines/devices here at home.
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post #5069 of 5185 Old 06-15-2017, 10:29 AM
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How to format a flash drive in Windows 7 for use with iView

In Windows 7, double-click "Computer," then right-click the flash drive's letter and click Format. You'll get a dialog box like this:

Click the drop-down for "File system" and select FAT32 or NTFS. Don't use FAT or exFAT if those options are offered. NTFS is probably the better choice since the iView will break up recordings on FAT32 drives into multiple 512 MiB files.

Click the drop-down for "Allocation unit size" and select the largest size offered. For NTFS this will probably be 64 kilobytes. The thinking is, this will reduce the size of the data structures required to track the space used by each file, and there's not much downside since video files are really large anyway.

Definitely select "Quick Format." Otherwise it'll take all night! Enter a volume label if desired, then click Start.

I think Macs support formatting with FAT32 and/or NTFS too, but I'm not familiar with the process.
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Last edited by JHBrandt; 06-15-2017 at 10:34 AM.
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post #5070 of 5185 Old 06-15-2017, 06:42 PM
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256GB Flash & iView [follow-up]

A big Thank You to JHBrandt for taking the time to give me thoughtful answers on my iView recorder. Unfortunately, increasing the Allocation Unit Size did not fix my problem, but I'm very glad to have a source who helped me to exhaust all possible solutions.
Best regards to you, and all who help others--in matters big and small.
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