Hitachi 21, BE-IR20 manual Function setting and changes, AGC on / off

11.Function setting and changes

When changing the function settings , perform the work with thorough care. Be sure to use anti-static measures such as a grounding band. Also observe safety precautions when soldering to avoid burn and fire hazards.

Hitachi Denshi assumes on liability for damage or injury resulting from such work.

Since the function setting can be provided at the time of shipment , consult a Hitachi Denshi representative.

11-1 AGC on / off

Factory setting is AGC off (fixed gain). If necessary in the application, AGC can be set to on.

When the AGC is off, the gain can be changed by turning RV201.

Set AGC on by changing the indicated chip parts.

Gain	R211	R212
fixed gain	0Ω	Absent	Factory setting
AGC	Remove	0Ω

Location of chip resistor (Main board side A)

BE-IR20 / 21 11