Datasheet

LongReach 16 Active CCTV Receiver Hub

Adding Cameras in an Existing Hub Installation

In an existing installation, it may be necessary to add or change cameras on a LongReach 16

Hub. In order to ensure proper functioning of the hub after the new cameras are connected, it is

necessary to first “reset” the hub before bringing the new cameras on-line. This may be

achieved by performing one of the following procedures:

Procedure A:

1. Connect the new cameras to the hub while the hub is powered on.

2. Power off the hub for one minute in order to allow the hub to reset.

3. Power on the hub and allow one (1) minute for the auto-gain to stabilize.

Procedure B:

1. Power off the hub.

2. Connect the new cameras to the hub while the hub is powered off.

3. Power on the hub and allow one (1) minute for the auto-gain to stabilize.

Please note that if the above procedure is not followed, then the hub may not properly perform

auto-gain compensation resulting in poor image quality.

Switching Camera Connections

Each port on the LongReach 16 is independently controlled and optimized for the camera and

cable that is connected to it. When a LongReach port is switched to a different camera, either

manually or via a video cross-point switch, the AGC control for that port will automatically

recalculate the optimum settings. This may take up to two or three seconds. The greater the

difference in cable length or signal level between the first camera and the second camera, the

greater will be AGC time delay. When the cable length and signal input level of the switched

ports are similar, the time delay for the image to stabilize will be minimal. Therefore the time

necessary for AGC compensation to stabilize is related to the change in cable length and/or

input signal levels.