Each channel had a unique themed test card.

每个频道都有各自不同主题的测试卡。

The optician asked him to point to a test card.

验光师指着视力表问他：“你能认出来吗？”

The whole testing system is composed by PC, test card and small embedded system which need to be the test.

整个测试系统由上位机pc，测试卡，待测嵌入式对象组成。

You can learn the card reader is normal by operating the card reader self-test button or using the test card to verify.

可先行操作读卡设备本身之自我测试功能键，检查读卡设备是否正常或使用测试卡测试。

PC application software has the function of testing command transferring which based on SCPI protocol and test result display, USB port communicate with test card.

上位机pc的应用程序实现了基于SCPI协议的测试指令发送和测试结果显示的功能，与测试卡通过usb接口通讯。