Videoswitch VT - Manual (Page 13)

VT Series 2 User Manual Page 13
Videoswitch
VT601c.doc
7. Receiver SET Operations
All receiver set-up functions involve pressing the SET key and one or more other keys in combination.
Note that the SET key lockout (section 8.5) must be turned off before any of these actions can be
performed.
For all receiver SET operations, always first press and hold down the SET key. Then press the other
key(s) as described in the following sections, holding them for about a second to ensure the command has
been recognised by the receiver. Then release the keys, making sure that the SET key is released last.
Where the Zoom iris and focus keys are referred to, a “
↑
” indicates the upper key and a “
↓
” indicates the
lower key.
7.1 Video Gain
The video gain of the receiver (this feature is not available on VR-3 receivers) may be set to one of eight
values from the transmitter (1 is the lowest gain, suitable for short cables, 8 is suitable for up to 1km of
coax):
[SET], [ALARMS] and [Preset 1, 2, 3, 4, 5, 6, 7 or 8]
The gain should be set to obtain the best picture quality. If the gain is set too high, picture quality will
suffer and the picture may roll on the monitor.
7.2 Video Lift
The video amplifier in the receiver can have its high frequency response modified (this feature is not
available on VR-3 receivers) to obtain optimum picture quality. The video lift should be set to minimum
for short cable runs, and increased just enough to sharpen vertical edges in the picture. Too much video lift
will degrade the picture.
To increase the lift, press:
[SET], [ALARMS] and [Joystick Up]
To decrease the lift:
[SET], [ALARMS] and [Joystick Down]
Hold until the required setting is obtained, then release all keys. Note that it may take up to 30 seconds to
cover the whole range of adjustment.
7.3 Zoom Speed
The zoom speed (voltage) may be set to one of eight options by pressing the following keys:
[SET], [ZOOM
↑
] and [Preset 1, 2, 3, 4, 5, 6, 7 or 8]
The higher the number selected, the faster the zoom rate.
7.4 Iris Speed
The iris speed (voltage) may be set to one of eight options by pressing the following keys:
[SET], [IRIS
↑
] and [Preset 1, 2, 3, 4, 5, 6, 7 or 8]
The higher the number selected, the faster the iris rate.
7.5 Focus Speed
The focus speed (voltage) may be set to one of eight options by pressing the following keys: