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Operation
This selects a mode for external shutter speed control. Hexadecimal shutter number (3 digit) follows “SX” command (e.g., “080” = 128H, shutter speed = 4.1msec). It moves the shutter discharge pulse at every 1H (32 µsec.) period from 254 (no shutter) to 1H (max. speed).
Command G
Function: A/D
The “GM” command controls the gains of the A channel and the B channel. The “GA” and “GB” commands fine tune the gain of the A and B channels respectively, to achieve balance. The ratio is about 5:1.
Examples:
R4
A(5:1)
R3
M
R5
B (5:1)
R6
Ch.A
R1
R2
Ch.B
“:”, “GM”, “D2”, CR D2 = gain 210
3AH, 47H, 46H, 46H, 0DH
“:”, “GA”, “12”, CR
3AH, 47H, 31H, 32H, 0DH Gain control value 18
GAIN (dB)
Voltage |
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3.5 | 4 |
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| 30 |
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3.1 | 3 |
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| 20 |
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2.5 | 2 |
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1.9 | 1 |
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| 0 |
| 130 160 190 225 | Counts |
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| 90 | 1.0 | 2.0 | 3.0 | 4.0 | VOLTAGE (V) | ||
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Command V
Function: A/D reference voltage control. In the default gain setting there is no shutter. The A/D reference voltage bottom is preset to 0.45V. The controllable range of the reference voltage (Vref1,
