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Installation Manual – Rx100 Interface Edition 1.5
March 2001
Page 9
4. SETUP
DIAGNOSTIC AIDS
Two L.E.D.s are mounted on-board to give simple system status information. Their functions are as
follows:
Cable LED
Regular Blinking
-
Telemetry and video signals are OK.
Blinking but mainly ON
-
No Telemetry from the transmitter.
Blinking but mainly OFF
-
No video from the camera.
Error LED
On
-
Telemetry transmission error.
Both LEDs
Off
-
No power or major PCB fault.
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 RG59, are and
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
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 RG59.
For shorter cable lenghts, 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.
TELEMETRY
CAMERA
GAIN
LIFT
Video
from
dome
Video
to
transmitter
HF Lift
Gain