Texas Instruments MC-780PIx manual ±5. Gain Mode Switch SW2, Gain Variable Volume Control VR1

		Gain Variable Volume Control VR1
Table 2±5. Gain Mode Switch SW2
	Switch No.	Gain Mode
	Left	AGC
	Center	Fixed
	Right	Variable
Figure 2±3. Gain Mode Switch SW2

Left Right

Center

2.2.5Gain Variable Volume Control VR1

When variable gain is selected with gain mode switch SW2 in the right position, gain is increased by turning VR1 counterclockwise as shown in Figure 2±4.

Figure 2±4. Gain Variable Volume Control VR1

UP

2.2.6DC IN Terminal

Use when the power source is supplied by the AC adaptor: PS-780-12J. When a different type of power source is used, the connector standard must conform to EIAJ, RC-5320A Voltage Classification 4.

2.2.7LENS Terminal

When the auto-iris lens plug is connected, the lens iris can be adjusted auto- matically. This is also the terminal for inputting the shutter trigger cable con- nector: HR10A-7P±6P. Table 2±6 lists the terminal pins, signals, and levels.

Table 2±6. LENS Terminal

Pin No.	Input Signal	Signal Level
1	Field index output	Good for HC125
2	Shutter trigger input	CMOS level
	VI command input
3	Ground
4	Readout field indicator output	Good for HC125
5	Image signal output (for iris)
6	DC + 12V output (for lens)

Nomenclature and Use of Each Component 2-5