8.1.7 Synchronous Recording
Several camera images can be mixed together through a camera switcher and then recorded separately onto several VCRs. To do so, assign a camera to each VCR. The VCR records only the camera image assigned to it. This allows recording without gaps.
If you have three VCRs, the video signals from the three cameras can be recorded separately by connecting the switcher as shown in Figure 21.
V-SYNC
SWITCHER/ switching cameras / recording start signal
VCR 1 | / recording |
| / clock out |
VCR 2 | / recording |
| / clock out |
VCR 3 | / recording |
| / clock out |
CAMERA1 CAMERA 2 CAMERA 3 CAMERA 1 CAMERA 2 CAMERA 3 CAMERA 1 CAMERA 2 CAMERA 3
REC 
REC 
REC
REC 
REC 
REC
REC 
REC 
REC
Figure 20. Synchronous Recording Sequence
CAMERA1
CAMERA2
CAMERA3
VIDEO IN
VCR1
VCR2
SWITCHER
VCR3
CLK OUT
REC IN CLK OUT
REC IN
The programming procedure is as follows:
1.Set REC IN on the Rear Terminal menu to SERIES or
2.Set CLOCK OUT on the Rear Terminal menu to
3.Set REC IN on the Rear Terminal menu to SYNC REC for all VCRs except VCR1.
•If the switcher has a recording start signal, set REC IN on the Rear Terminal menu to SYNC REC on VCR1. Then, VCR1 will always record the picture from camera 1.
•You must set the recording mode to L18H or L24H mode.
•The suitable numbers of VCRs and cameras are shown in Table F.
Figure 21. Connection for Synchronous Recording
Pelco Manual C649M (7/99) | 35 |