Zenith DTT901 Installation And Operating Manual page 17

ANALOG PASS-THROUGH FEATURE
Federal law requires that all "full-power" television stations must end analog
broadcasts after February 17, 2009, but this does not include "low-power" TV
stations (such as "low-power" or "community" stations of very restricted range
(LPTV), "Class A" stations, and "translator" or "booster" stations).
These stations may continue to broadcast in analog after the February 17,
2009, digital conversion deadline for full-power television stations.
This converter box has a feature called "Analog Pass-Through," which
allows your analog TV to continue to tune the analog low-power stations.
Simply put, to receive analog stations, turn off the box; the analog signal will
"pass-through" the box to be tuned in the TV. To enjoy the digital stations,
tune them through the converter box as explained in this operating guide.
NOTE: Online resources with low-power TV information include:
www.dtvtransition.org/Iowpower, https://www.dtv2OO9.gov/Iowpower/, and
www.dtv.gov. For a map and list of low-power stations by state, please visit
www.ntia.doc.gov/dtvcoupon/LPTVmap.html