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22 Pelco Manual C554M-A (5/98)
4.0 OPERATION
4.1 Preset Power-up Routine
When a pre-position Coaxitron
®
receiver is first powered up, it goes through a rou-
tine that orients itself to the pan/tilt and lens connected to it.
The routine first automatically operates the lens zoom and focus functions. The
pan/tilt will tilt up and down (nod yes) if the receiver reads feedback voltages (indi-
cating a pre-position lens) or pan left and right (nod no) if it does not read any
feedback voltages (indicating a manual lens).
The second part of the routine will operate the pan left and pan right functions. The
pan/tilt will tilt up and down (nod yes) if it reads only one feedback voltage (indicat-
ing a pan/tilt with limit stops.) The pan/tilt will pan left and right (nod no) if it reads
two feedback voltages (indicating a SL pan/tilt.)
This routine is a good troubleshooting indicator that the control cable has been
wired properly. The total routine takes approximately 45 seconds to complete.
4.2 Creating Presets
Coaxitron
®
controllers capable of creating presets include the CM6700, CM7500,
CM8500, CM9500, and CM9760-CXT. Refer to the installation operation manual for
the Coaxitron
®
controller you are using when creating presets.
Refer to Figure 3 and Tables B, C, and D when assembling pin-to-pin wiring con-
nections from preset domes, pan/tilts and lenses to the Coaxitron
®
receiver.
4.3 Auto/Random Operation
The A9000 Auto/Random Scan module is a plug-in PC board option for Coaxitron
®
receiver/drivers. This module provides auto scan and random scan modes for auto-
matically controlling pan and tilts within preset limits. The random scan and auto
scan functions are controlled by a MPT9000 Series controller.
Advantages of random scan:
1. Because the scan direction, scan period, and dwell period are unpredictable,
unauthorized activities or intrusions are discouraged.
2. Because of the reduced duty cycle, gear train wear, cable fatigue, drive motor
wear, and temperature rise are reduced. These factors all contribute to higher
system reliability and increased equipment life.
Refer to the A9000 manual for installation and operation instructions.