In order to improve engineering English writing ability，start from today，record my daily work of electronic designer。
today，I have test alternative NPN Transistor foe TX Module，The following is the process of debugging the spectrometer。
Environment seting:
frequency:433.92Mhz
span:200Khz (It means that the band width,according the datasheet )
offset:deviation compensation (when the instrument in not accurate ,we need to use it )
Sweep Time: 1s (when we give the tx module a high-frequency signal, we should set a long time,such as 1 second )
Ref level：10dbm ( refer to datasheet for tx module )
（1）power test （TX module 433.92）
press the peak search，and reading the power valves。
（2）frequency deviation test （2sc3356 npn transistor & mas4901 ）
maker -> Normal -> 433.92Mhz -> delta-> per search.
(3) harmonic test (The general situation requires 5 data )
frequency-> cf.step-> input 433.92Mhz-> press UP or Down—> per search
3 Effect drawing .
ok, that's over. next step. I need to test 20 sample . wish me good luck.