jtbell
09-20-09, 02:25 PM
I've set up my Panasonic DMR-EH75V to receive TVGOS data OTA via a Dish DTVPal+ converter box. It works, but there are a few awkward things about it.
(Note that I use OTA TV only, no cable or satellite. Also, this procedure should apply equally well to the DMR-EH55 which has the same version of TVGOS.)
Method 1: Connection Via RF Channel 3
I fed the DTVPal+'s RF output into the EH75V's RF input, turned both units on, set the EH75V to channel 3, hooked up the EH75V's IR blaster and put it in front of the DTVPal+, and put the DTVPal+ into TV Guide mode via its System Setup menu option.
Then I went into the EH75V's TV Guide setup. I gave it the "fake ZIP code" for my area from the DTVPal+ manual, indicated that I was using "cable with cable box" and a Scientific Atlanta cable box, and that I use four digits for channel numbers. Then it started to test remote codes, and here I ran into a problem. The EH75V tests a remote code by trying to go to channel 09. The problem is that the DTVPal+ (in TVGOS mode) has no channel 09!
In TVGOS mode, the DTVPal+ uses fake channel numbers that look like analog ones (without a dash or decimal point) to tune to digital channels (which have a dash or decimal point). To get the fake channel number for a digital subchannel, you drop the period or dash from the digital number, then add 100. For example 4.1 --> 141 and 29.2 --> 392. There's no digital subchannel that has fake channel number 09.
So, to test the first Scientific Atlanta remote code (009), I accepted it and finished the TV Guide setup process, then entered a few fake channel numbers for digital channels that I knew existed. Fortunately, they worked. If they hadn't, I would have gone back into the TV Guide setup and selected the next Scientific Atlanta code, repeating the process until I found one that worked.
I turned off the EH75V overnight. The following morning I had program listings for days 1, 2, 5 and 8, matching the old TVGOS analog download schedule. But now I had another problem: TVGOS had not only "turned on" listings (for example) for my local channel 4 (WYFF's main HD subchannel 4.1 a.k.a. 141 and SD weather subchannel 4.2 a.k.a. 142), it had also turned on all the other channel 4's in the adjacent DMA's. Similarly for all the other channels that I could receive. So I had to go into the channel editor and turn off a lot of extra channels.
In addition, there were some channels that I couldn't receive at the moment, but that I can receive by rotating my antenna. These weren't turned on, so I had to turn them on myself. Finally, there are some errors in subchannel assignments because TVGOS hasn't caught up with some subchannel changes in my area, so I had to fix those. Eventually I did get listings for almost every subchannel I can get, missing only a couple of weather subchannels.
In this setup, TVGOS doesn't display the actual channel number, only the fake channel number. Therefore my "channel 4" is listed as NBC 141 WYFF-HD. This would probably mystify someone who knows the station as "channel 4." Also, in order to tune directly to a station, without entering TVGOS and clicking on a listing, you have to enter the fake channel number on the EH75V's remote, e.g. you have to enter 141 to go to (sub)channel 4.1. Simply entering "4" doesn't get you anywhere.
Finally, I consider the picture from the DTVPal+'s RF output to be unacceptably soft. Fortunately, the picture from the composite-video output is significantly better. Read on...
One final note about setup: the first time I set up TVGOS, I told it to use three-digit channel numbers. This worked OK for entering channel numbers by hand with the remote. However, when the EH75V sends channel numbers automatically (for example when starting a scheduled recording), it often does it twice, back to back, and somehow they overlapped or interfered with each other so the channel didn't change properly. Re-doing the setup to indicate four-digit channel numbers fixed this. For my channel 4.1, the EH75V now sends codes for 0141. But when changing channels directly with the remote, I can still use three digits.
Method 2: Connection Via Line Input IN3
After about a week with Method 1, I switched to a composite-video connection between the DTVPal+ and the EH75V, to see if it would give me a better picture. Also, I like to use the EH75V's tuner to check on the handful of low-power analog stations that I can barely receive. My TV's own tuner "helpfully" blanks out signals that drop below a certain threshold.
I connected my antenna cable to the EH75V's RF input, and the EH75V's RF output to the DTVPal+'s RF input. I also connected the DTVPal+'s A/V outputs (yellow composite plus red/white audio) to the corresponding IN3 inputs on the EH75V. This means that DTV signals now made a rather convoluted journey: from the antenna into the EH75V and out to the DTVPal+ via the RF connections, then (after conversion) back into the EH75V via the composite connection!
In the EH75V's TV guide, I went to the setup screen and chose "Change System Settings." I checked both "Antenna" and "Cable with cable box" in the services screen, and on the following screen, I indicated that the "cable box" was on IN3. I left the other settings (ZIP code, cable box code, etc.) as they had been.
I did not lose any guide data during this process, and I was able to continue using the guide as before. The only difference was that now, when cycling through the inputs using the "Input" button on the remote, the antenna and "cable" channels came up as separate inputs: IN1 --> IN2 --> DV --> antenna [RF] --> "cable" [IN3]. I could now tune to either analog antenna channels using their real channel numbers, or digital antenna ("cable") channels using their fake channel numbers, by selecting the appropriate input first.
The picture is significantly sharper with this connection than with the pure RF connection. Compared to my Zenith DTT901 converter box, it's somewhat brighter overall but with less contrast (i.e. the blacks aren't as dark), and colors aren't as vivid.
The only question now is whether the TVGOS data will continue to come in via IN3 as it should. Tomorrow morning will tell...
Added 2009-09-21: The guide did update normally overnight. Therefore the IN3 connection works just as well as the RF connection as far as TVGOS is concerned.
I started to do all this originally just out of curiosity. Most of the stuff I want to archive is in HD now, and for that I use an EyeTV USB tuner on a MacBook, and burn the stuff to an AVCHD-format DVD+R DL which can hold up to about 90 minutes of HD material and can be played on my Blu-ray player.
However, one of my local stations has started showing Star Trek: The Next Generation in syndication, five nights a week, in upconverted SD of course. Last week I recorded the shows on my HD DVR, then dubbed them to the EH75V, which gave good picture quality but was time-consuming. Recording directly to the EH75V, automatically every night, would save some work over dubbing it from my HD DVR, and this station doesn't have top-notch picture quality anyway, so the composite-video connection will probably be good enough for this job. I'll try it this week and see how it turns out.
(Note that I use OTA TV only, no cable or satellite. Also, this procedure should apply equally well to the DMR-EH55 which has the same version of TVGOS.)
Method 1: Connection Via RF Channel 3
I fed the DTVPal+'s RF output into the EH75V's RF input, turned both units on, set the EH75V to channel 3, hooked up the EH75V's IR blaster and put it in front of the DTVPal+, and put the DTVPal+ into TV Guide mode via its System Setup menu option.
Then I went into the EH75V's TV Guide setup. I gave it the "fake ZIP code" for my area from the DTVPal+ manual, indicated that I was using "cable with cable box" and a Scientific Atlanta cable box, and that I use four digits for channel numbers. Then it started to test remote codes, and here I ran into a problem. The EH75V tests a remote code by trying to go to channel 09. The problem is that the DTVPal+ (in TVGOS mode) has no channel 09!
In TVGOS mode, the DTVPal+ uses fake channel numbers that look like analog ones (without a dash or decimal point) to tune to digital channels (which have a dash or decimal point). To get the fake channel number for a digital subchannel, you drop the period or dash from the digital number, then add 100. For example 4.1 --> 141 and 29.2 --> 392. There's no digital subchannel that has fake channel number 09.
So, to test the first Scientific Atlanta remote code (009), I accepted it and finished the TV Guide setup process, then entered a few fake channel numbers for digital channels that I knew existed. Fortunately, they worked. If they hadn't, I would have gone back into the TV Guide setup and selected the next Scientific Atlanta code, repeating the process until I found one that worked.
I turned off the EH75V overnight. The following morning I had program listings for days 1, 2, 5 and 8, matching the old TVGOS analog download schedule. But now I had another problem: TVGOS had not only "turned on" listings (for example) for my local channel 4 (WYFF's main HD subchannel 4.1 a.k.a. 141 and SD weather subchannel 4.2 a.k.a. 142), it had also turned on all the other channel 4's in the adjacent DMA's. Similarly for all the other channels that I could receive. So I had to go into the channel editor and turn off a lot of extra channels.
In addition, there were some channels that I couldn't receive at the moment, but that I can receive by rotating my antenna. These weren't turned on, so I had to turn them on myself. Finally, there are some errors in subchannel assignments because TVGOS hasn't caught up with some subchannel changes in my area, so I had to fix those. Eventually I did get listings for almost every subchannel I can get, missing only a couple of weather subchannels.
In this setup, TVGOS doesn't display the actual channel number, only the fake channel number. Therefore my "channel 4" is listed as NBC 141 WYFF-HD. This would probably mystify someone who knows the station as "channel 4." Also, in order to tune directly to a station, without entering TVGOS and clicking on a listing, you have to enter the fake channel number on the EH75V's remote, e.g. you have to enter 141 to go to (sub)channel 4.1. Simply entering "4" doesn't get you anywhere.
Finally, I consider the picture from the DTVPal+'s RF output to be unacceptably soft. Fortunately, the picture from the composite-video output is significantly better. Read on...
One final note about setup: the first time I set up TVGOS, I told it to use three-digit channel numbers. This worked OK for entering channel numbers by hand with the remote. However, when the EH75V sends channel numbers automatically (for example when starting a scheduled recording), it often does it twice, back to back, and somehow they overlapped or interfered with each other so the channel didn't change properly. Re-doing the setup to indicate four-digit channel numbers fixed this. For my channel 4.1, the EH75V now sends codes for 0141. But when changing channels directly with the remote, I can still use three digits.
Method 2: Connection Via Line Input IN3
After about a week with Method 1, I switched to a composite-video connection between the DTVPal+ and the EH75V, to see if it would give me a better picture. Also, I like to use the EH75V's tuner to check on the handful of low-power analog stations that I can barely receive. My TV's own tuner "helpfully" blanks out signals that drop below a certain threshold.
I connected my antenna cable to the EH75V's RF input, and the EH75V's RF output to the DTVPal+'s RF input. I also connected the DTVPal+'s A/V outputs (yellow composite plus red/white audio) to the corresponding IN3 inputs on the EH75V. This means that DTV signals now made a rather convoluted journey: from the antenna into the EH75V and out to the DTVPal+ via the RF connections, then (after conversion) back into the EH75V via the composite connection!
In the EH75V's TV guide, I went to the setup screen and chose "Change System Settings." I checked both "Antenna" and "Cable with cable box" in the services screen, and on the following screen, I indicated that the "cable box" was on IN3. I left the other settings (ZIP code, cable box code, etc.) as they had been.
I did not lose any guide data during this process, and I was able to continue using the guide as before. The only difference was that now, when cycling through the inputs using the "Input" button on the remote, the antenna and "cable" channels came up as separate inputs: IN1 --> IN2 --> DV --> antenna [RF] --> "cable" [IN3]. I could now tune to either analog antenna channels using their real channel numbers, or digital antenna ("cable") channels using their fake channel numbers, by selecting the appropriate input first.
The picture is significantly sharper with this connection than with the pure RF connection. Compared to my Zenith DTT901 converter box, it's somewhat brighter overall but with less contrast (i.e. the blacks aren't as dark), and colors aren't as vivid.
The only question now is whether the TVGOS data will continue to come in via IN3 as it should. Tomorrow morning will tell...
Added 2009-09-21: The guide did update normally overnight. Therefore the IN3 connection works just as well as the RF connection as far as TVGOS is concerned.
I started to do all this originally just out of curiosity. Most of the stuff I want to archive is in HD now, and for that I use an EyeTV USB tuner on a MacBook, and burn the stuff to an AVCHD-format DVD+R DL which can hold up to about 90 minutes of HD material and can be played on my Blu-ray player.
However, one of my local stations has started showing Star Trek: The Next Generation in syndication, five nights a week, in upconverted SD of course. Last week I recorded the shows on my HD DVR, then dubbed them to the EH75V, which gave good picture quality but was time-consuming. Recording directly to the EH75V, automatically every night, would save some work over dubbing it from my HD DVR, and this station doesn't have top-notch picture quality anyway, so the composite-video connection will probably be good enough for this job. I'll try it this week and see how it turns out.