Eclipse EC-11-xxx40, Руководство пользователя

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EC-11 User’s Manual
27
DALSA Corp. 03-32-00418-05
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No test pattern or bad test pattern — May indicate a problem with the camera (e.g.
missing bit) or a system setup problem (e.g. frame grabber or timing). Verify the
presence of the LVAL and STROBE signals.
•
Test pattern successful — Run the
set_video_mode 0
command to deactivate
video correction. Then run the
get_line
command under both dark and light
conditions to retrieve a line of raw video (no digital processing). Under dark
conditions, with factory settings, the analog offset value should be within the specified
range (refer to the user specifications). Adjust the analog offset using the
set_analog_offset
and
calibrate_analog_offset
commands. Under light
conditions, you should receive a value.
Verify Voltage
To check the camera’s input voltages and internal voltages, use the
verify_voltage
command. If they are within the proper range, the camera returns OK>. Otherwise the
camera returns an error message.
Verify Temperature
To check the internal temperature of the camera, use the
verify_temperature
command. For proper operation, this value should not exceed 75°C.
Verify Pixel Coefficients
To activate video correction, send the command
set_video_mode 1
. Then use the
display_pixel_coeffs
command to display the pixel coefficients in the order
PRNU, FPN, PRNU, FPN, …for both directions.
4.3 Specific Solutions
No Output or Erratic Behavior
If your camera provides no output or behaves erratically, it may be picking up random
noise from long cables acting as antennae. Do not attach wires to unused pins. Verify that
the camera is not receiving spurious inputs (e.g. EXSYNC or EXCLK, if camera is in
external mode).
Line Dropout, Bright Lines, or Incorrect Line Rate
Verify that the frequency of the internal sync is set correctly, or when the camera is set to
external sync that the EXSYNC signal supplied to the camera does not exceed the
camera’s maximum specified line rate.
Noisy Output
Check your power supply voltage outputs for noise. Noise present on these lines can
result in poor video quality. Low quality or non-twisted pair cable can also add noise to
the video output.