[求助]如何用labview对数据采集卡自带的PGA进行编程？

如何用labview对数据采集卡自带的PGA进行编程？
本人使用的NI USB6009
由于输入信号太小，想利用NI USB6009自带的PGA对输入信号进行放大
问过NI的技术支持，说是可以进行编程，说是利用属性节点就可以，还说MAX help里面有提示，但我找了好久，就没找到，于是来这里请教各位大虾
USER GUIDE AND SPECIFICATIONS
USB-6008/6009中介绍PGA的内容如下：
PGA
The progammable-gain amplifier provides input gains of 1, 2, 4, 5, 8, 10,
16, or 20 when configured for differential measurements and gain of
1 when configured for single-ended measurements. The PGA gain is
automatically calculated based on the voltage range selected in the
measurement application.