Diagnostic Aids

4. SETUP

Two red LEDs and one Green LED are mounted on-board to give simple system status information. Their functions are as follows:

Cable LED

Regular Blinking- Blinking but mainly ON Blinking but mainly OFF

Error LED

Both LEDs

Off

Data LED (Iss PCB 4 onwards only) is

Test Link

Telemetry and video signals are OK.

-No Telemetry from the transmitter.

-No video from the camera.

-Telemetry transmission error.

-No power or major PCB fault.

- Will flash on and off very fast when data being sent to the dome.

-Is used to confirm correct operation of the

Rx100 and dome and also that the RS485 connection is correct. Shorting the link after the Rx100 is powered up will cause the dome to pan left and zoom in. Removing the link will stop the pan left and will zoom out the lens. This is dependant on dome type.

All BBV equipment is designed to auto-tune and compensate for any discrepancies in the transmitted telemetry signal; there are no further adjustments that need to be made.

VIDEO LAUNCH AMPLIFIER AND CABLE LENGTH COMPENSATION

The interface features a video launch amplifier with two variable controls situated close to the BNC connectors: Lift and Gain. These are pre-adjusted for a cable distance of 500m of CT125, and are adjustable to compensate for video detail or signal losses if and when longer or shorter cable lengths are used to connect the telemetry transmitter to the interface.

Fig. 3 Launch Amplifier

HF Lift

Gain

	CAMERA	Video
	LIFT	from
	LIFT	dome
		dome
	GAIN

Video

transmitter

TELEMETRY

The purpose of each control is:

GAIN	varies the overall signal level.
LIFT	boosts the high frequency component of the video

signal. If the high frequency component is too low, picture appears ‘washed out’ and lacking detail.

Default position adjusted for 500M of CT125.

For shorter cable lengths, turn the Gain control anti-clockwise until 1V p-p is present at the telemetry transmitter. For longer cable lengths, turn the Gain control clockwise until 1V p-p is present at the telemetry transmitter.

Rx100 installation manual V1.17 29 Aug 08.doc

Page 9

Sony RX100 manual Diagnostic Aids, Video Launch Amplifier and Cable Length Compensation