Psd Sensor Gain Adjustment - Sony DCR-TRV940 Adjustment Manual

15. PSD Sensor Gain Adjustment

Adjust the gain of the PSD sensor for the steady shot.
• Perform the angular velocity sensor sensitivity adjustment only
when replacing the angular velocity sensor or lens block. When
the microprocessor, circuit, etc. malfunctions, do not perform
this adjustment but check operations only.
Note 1: Check that the data of page: 0, address: 10 is "00".
Note 2: NTSC model: DCR-TRV940/TRV950
PAL model: DCR-TRV940E/TRV950E
Switch setting
1) POWER ................................................................... CAMERA
2) ZOOM ..................................................................... TELE end
3) DIGITAL ZOOM (Menu setting) .................................... OFF
4) STEADY SHOT (Menu setting) ....................................... ON
15-1. PSD Sensor Gain Adjustment (1)
Subject Pattern A
(1.5 m from the front of lens)
Measurement Point Video terminal of A/V jack
Measuring Instrument Oscilloscope (V period)
Adjustment Page F
Adjustment Address 84
Pattern A
A4 size (297 x 210 mm)
Fig. 6-1-17
Adjusting method:
Order Page Address Data
1 0 01 01
2 F 84 80
3 6 01 8F
4
5
6
7 6 01 91
8
9
White
Black
White
Procedure
Press PAUSE button.
Press PAUSE button.
Shoot the pattern A at the
TELE end.
Adjust the focus.
Measure the falling edge of
waveform, SV1 (msec).
Press PAUSE button.
Measure the falling edge of
waveform, SV2 (msec).
Calculate D using
SV
following equations.
(decimal calculation) (Note 1)
NTSC:
= 2.751 ÷ (SV2 – SV1)
D
SV
PAL:
= 3.298 ÷ (SV2 – SV1)
D
SV
DCR-TRV940/TRV940E/TRV950/TRV950E
Order Page Address Data
10
11
12 F 84
Note 1: Keep a note of D
Sensor Sensitivity Adjustment".
Note 2: Refer to table 6-4-1. "Hexadecimal-decimal conversion
table"
Processing after Completing Adjustment:
Order Page Address Data
1 6 01
2 0 01
3
Falling edge of
waveform when
data is "8F"
SV1 (msec)
6-35
Procedure
Calculate D ' using
84
following equations.
(decimal calculation)
' = 128 × D
D
84 SV
Convert D ' to a hexadeci-
84
mal number, and obtain D
(Note 2)
D Press PAUSE button.
84
value to use at "16. Angular Velocity
SV
Procedure
00 Press PAUSE button.
00
Check that the steady shot
function operates normally.
V
Falling edge of
waveform when
data is "91"
SV2–SV1
SV2 (msec)
Fig. 6-1-18
.
84