最近我在做CC2530的OTA升级，我看Z-Stack OTA Upgrade User's Guide文档里有段话：
The following equipment and software are required for use of the Sample OTA Applications:
Texas Instruments’ Z-Stack v2.4.0 or greater
IAR Embedded Workbench
Two Evaluation Boards with EM modules
The OTA sample application is available for the following Texas Instrument’s ZigBee Platforms.
CC2530DB - SmartRF05 with attached CC2530EM
EXP5438 - EXP430F5438 with attached CC2520EM
CC2520DB - SmartRF05 with attached CCMSP-EM430F2618 with attached CC2520EM
问题：
1.请问CC2530EM、CC2530EB、CC2530DB分别是什么意思啊？
2.“Two Evaluation Boards with EM modules”，什么是Evaluation Boards？什么是EM modules？
3.我现在手上只有SmartRF04EB的仿真器，没有SmartRF05可以做OTA升级吗？
