Adjustment
For optimum performance, under all lighting conditions, it is highly recommended to use a
Grey scale/Multiburst Video Generator, and an Oscilloscope for the adjustment.
Especially when using digital video equipment - like DVR’s - it is important to adjust for
best possible video performance.
1.
Connect the Video Generator to the camera input of the BVT-230, and select the
Grey scale/Multiburst signal. Output must be 1Vpp. It is not mandatory to have a
colour signal.
2.
Set the links on the BVT-230, according to cable length and type.
3.
Connect an Oscilloscope and monitor, to the video output of the BVR-230-1GV (or
local monitor output on the BVX-230-1GV/3). To connect both Oscilloscope and
monitor to the receiver, use a BNC T-connector, or the loop output of the monitor.
Remember to set the monitor termination to 75 ohm.
4.
If a negative, or turned over, picture is displayed, swap the +/- twisted pair input on
the receiver.
5.
Check that the green SYNC LED on the receiver is flashing, indicating that a valid
video signal is received.
6.
On the receiver, turn pots RV1, RV2 and RV3 fully counter clockwise.
7.
Adjust RV1 (Gain) to an output of 1Vpp.
8.
Adjust RV3 (LF) to get the sync pulse as well defined as possible.
9.
Adjust RV2 (MF/HF) to get as much MF/HF signal (max. 0,7Vpp) as possible.
10. Readjust RV3 and RV2 to get the signal as identical as possible to the original
signal, see drawing below.
11. Readjust RV1 to exactly 1Vpp.
12. Check that the picture looks OK on the monitor.
Please note that adjustments RV2 and RV3 has a certain overlap, and will influence on
each other. The trick is to fine tune both for optimum signal.
Grey Scale/Multiburst Signal
Sync pulse (RV3)
Gray Scale (RV3)
Multiburst (RV2)
1 Vpp (RV1)
0,7 Vpp (RV2/RV1)
2800-00087
