MODEL: CDR1660 / CDR0860 / CDR0460 H.264
Clicking the 
button on the playback control bar or pressing the DIR button will change the direction of fast forward to rewind while maintaining the same speed.
7.7.1.3. PICTURE-BY-PICTURE
Pause the playback by pressing the PLAY/PAUSE button of the remote controller or the front panel.
Use the IRIS- and IRIS+ buttons of the remote controller to play or to play in reverse the recorded data
7.7.1.4. SLOW
The SLOW ( ) button of the playback control bar, the remote controller or the front panel slows down the speed of playback in one direction. Each pressing of the button further slows down the speed twice the previous speed. In other words, from normal speed, the slow down increment is x1/2, x1/4, x1/8, x1/16, x1/32, x1/64 and x1/128.
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