Originally Posted by nunofyerbisnes
Consult the "Quick Set-Up Guide" for the ZAT-970A. Under section 5
, step 2 of "To go back to digital channels:" indicates that powering off the box will take it out of APT (Analog Pass-Thru) mode.
Is that setup guide available on-line? The one that came with my ZAT-970A has no "to go back to digital channels" instructions in part 5, nor are there any where the RF Output setting is discussed on p. 6 of the manual.
I really don't understand the logic of this, but it was obviously how the box was designed. Unfortunately, if no work-around can be found, this design decision makes the box much less useful to someone who must have APT.
I hope there will be a simple way to deal with this.
RF Through is never entirely shut off, but if the box is on and RF Output is set to channel 3 or channel 4, the box's RF output kills the VHF-low channels; even then, RF passthrough for VHF-high and UHF channels comes through very well. If you need RF throughput only for channels 7-69, no workaround is necessary.
If you need it for channels 2-6, you quickly get experienced and skilled at blind-pressing the key sequence on the remote to get back to RF Through.
Update: while my browser was sitting at this composition window, I got through to their telephone support. A rep named Jessica confirmed that when the box is turned back on, RF Output does revert from RF Through to channel 3. I didn't ask her why but did explain why it's not such a great design choice. She was a little surprised that my use of RF Through wasn't to watch analog stations on an NTSC television but to watch either analog or digital stations on a TV with an ATSC tuner while I recorded something else on an NTSC-only VCR; seems that word of such usage hadn't spread around there.
In three months this will be only a curiosity for me and not a problem any more. Here in Chicago, after WBBM-DT (CBS O&O) moves from VHF3 to VHF12 in February, I won't be affected. A Class-A station that carries Azteca America (WOCK-CA, analog 13) is supposed to send its digital signal on VHF4 when they start one, but not being Chicano I'm not in their target demographic; a low-power station that carries MTV Tr3s (WLFM-LP, analog 6) is planning a flash cut on VHF6, but being neither young nor Latino I'm not in their target demographic either.
For those of you who need passthrough on VHF-low stations, just get used to blind-pressing the key sequence to go back to RF Through (and four Exit-key pressses after that in case you're recording the box's composite output to a VCR).