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Before proceding, please understand that the instructions below require a hacked TiVo. I assume you've read the TiVo Hack FAQ and you have shell access to your TiVo and TiVoWebPlus is installed. These instructions also utilize the dbsetx utility, written by one of the OzTiVo members.
I recently purchased a Zenith DTT900 (aka Insignia NS-DXA1) using a $40 DTV coupon for a standard definition TV I have hooked up to a Series1 standalone TiVo with a lifetime subscription. However, I found that while the converter box works well, there is no TiVo support for such boxes. After doing some research and trial and error I was able to get it to work using the method described below. This procedure is known to work with the Zenith DTT900/DTT901 and the Insignia NS-DXA1/NS-DXA1-APT). If you have a different model converter box it will use different remote codes, so you'll have to do a little research and experimentation to get the TiVo to control it.
To make the DTV converter box useful work we require two basic things:
If your cable provider doesn't carry your local HD channels, you may be better off using data from one of the satellite providers (e.g. DirecTV or Dish).
Don't worry about the channel numbers that the lineup uses. We'll map them to the correct values later. All that matters at this point is that the guide data includes your HDTV locals.
If you are using a DirecTV lineup, select an LG satellite receiver controlled via IR. If you chose a cable lineup, select a Zenith cable box with code number 10075 (or 10013 if your TiVo lacks the LG remote code). Be sure to select the option that specifies three digit channel numbers and the option to use the "enter" key after sending the channel number.
At the end of guided setup, select the HDTV versions of your local stations as channels you receive and remove the rest. You may see the same local channel listed multiple times. Either choose the one with a "DT" suffix or choose the highest-number non-DT channel. Don't worry that the channel numbers don't match the DTV converter, we'll take care of that in the next step.
There are two ways to remap the channel: via the TiVoWebPlus ChannelMap module, or by customizing a tcl script you then run on thre TiVo.
For each HDTV station that you receive, click its call sign to edit the channel info. For instance, in Baltimore, WMPTDT is the HDTV version of the local PBS station. On the DTV box, WMPT is channel 22 with three subchannels. If we change WMPTDT to channel 221 in the channel list, it will correspond to 22-1 on the DTV box. Don't input the -, the DTV converter will still work without it. Remapping channels via TiVoWebPlus is a slow process but you probably don't have too many of them to remap. After you have everything mapped correctly, click the "Save Current Channel State" button to save your updated channel list for later recovery, then click the "Commit Changes To Active Channels List" button to commit the changes to the active list. You should see output similar to the following:
Applying change for WMARDT 22 (Was 210) object 29026/2545 Applying change for WMARDT3 23 (Was 204) object 29026/2542 Applying change for WBALDT 111 (Was 211) object 29026/2546 Applying change for WBALDT2 112 (Was 208) object 29026/2544 Applying change for WJZDT 131 (Was 212) object 29026/2547 Applying change for WMPTDT 221 (Was 200) object 29026/2540 Applying change for WMPTDT2 222 (Was 220) object 29026/2550 Applying change for WMPTDT3 223 (Was 201) object 29026/2541 Applying change for WBFFDT 451 (Was 213) object 29026/2548 Applying change for WBFFDT2 452 (Was 206) object 29026/2543 Applying change for WNUVDT 541 (Was 214) object 29026/2549Save this info, you may find it useful if a lineup change occurs. After the changes have been committed, you should see the updated channel numbers in the TiVo guide and the "channels I receive" list.
WMARDT 210 -> 22 WMARDT3 204 -> 23 WBALDT 211 -> 111 WBALDT2 208 -> 112 WJZDT 212 -> 131 WMPTDT 200 -> 221 WMPTDT2 220 -> 222 WMPTDT3 201 -> 223 WBFFDT 213 -> 451 WBFFDT2 206 -> 452 WNUVDT 214 -> 541Once the script completes the channels will be remapped. The script method is handy since you can re-run it any time a lineup change reverts your channels to their original values. Note that channel_map assumes you are using a cable lineup for your DTV channels. If you are using a satellite lineup you'll need to modify the script.
With the IR blaster in place you should be able to control the DTV box with the TiVo remote and have guide data that matches your HDTV locals. Be sure to disable auto-off on your DTT900 to prevent it from going to sleep when the TiVo may need to talk to it.
If you used the script method to remap your channels, simply re-run the channel_map script.
If you used the TiVoWebPlus ChannelMap method, you can restore your old setting by clicking the "Restore Channel Map from Saved" button in the ChannelMap TiVoWebPlus module and committing the changes to the active channel list. Alternately, if you have the output from a previous run, you can write a script to do the changes. For example, given the following output:
Applying change for WMARDT 22 (Was 210) object 29026/2545 Applying change for WMARDT3 23 (Was 204) object 29026/2542 Applying change for WBALDT 111 (Was 211) object 29026/2546 Applying change for WBALDT2 112 (Was 208) object 29026/2544 Applying change for WJZDT 131 (Was 212) object 29026/2547 Applying change for WMPTDT 221 (Was 200) object 29026/2540 Applying change for WMPTDT2 222 (Was 220) object 29026/2550 Applying change for WMPTDT3 223 (Was 201) object 29026/2541 Applying change for WBFFDT 451 (Was 213) object 29026/2548 Applying change for WBFFDT2 452 (Was 206) object 29026/2543 Applying change for WNUVDT 541 (Was 214) object 29026/2549We can use the following bash script to make the changes using dbsetx:
/var/hack/bin/dbsetx 29026/2545 Number 22 # WMARDT /var/hack/bin/dbsetx 29026/2542 Number 23 # WMARDT3 /var/hack/bin/dbsetx 29026/2546 Number 111 # WBALDT /var/hack/bin/dbsetx 29026/2544 Number 112 # WBALDT2 /var/hack/bin/dbsetx 29026/2547 Number 131 # WJZDT /var/hack/bin/dbsetx 29026/2540 Number 221 # WMPTDT /var/hack/bin/dbsetx 29026/2550 Number 222 # WMPTDT2 /var/hack/bin/dbsetx 29026/2541 Number 223 # WMPTDT2 /var/hack/bin/dbsetx 29026/2548 Number 451 # WBFFDT /var/hack/bin/dbsetx 29026/2543 Number 452 # WBFFDT2 /var/hack/bin/dbsetx 29026/2549 Number 541 # WNUVDT
I have hacked up a simple program that watches the tvlog file and will run /var/hack/bin/channel_map when the logs indicate that a lineup change has occurred. A Series 1 binary is also available. The program runs as a daemon so you should run it from your rc.author file.
Alternately, if you have the cron daemon installed on your TiVo, you can run the script every half hour, before programs are generally scheduled using the following crontab line:
24,54 * * * * /var/hack/bin/channel_map >/dev/null 2>&1NOTE: There is a bug in the TiVo 3.1 software that will cause the event switcher to become unresponsive after a number of script runs. As a workaround, you can install Martijn Van Oosterhout's evtswitchfix.
If you need to add custom IR codes to control your DTV converter box, you can use the ozTiVo IrSliceCreator to generate codes for your DTV converter. They also have a page with more details about this.