about dbm/200khz problem..

super

Dear all :
6 R8 k& g6 [1 D8 t+ N               The doc spec write as below ,
! U( J. X; M" W  P, o                   Frequency         Emission Level
                2Mhz to 50Mhz    -30dbm/200khz
/ f6 f  `8 ?+ g/ z% L1 L% b$ i
             1. what's it mean ?
5 _4 n3 `! Q6 ^+ m- f             2. How should I do when I measure spurious use Spectrum Analyzer ?
            (ex: set RBW=200khz  and measured spurious below -30dbm is pass ?
  f( S; d& K: Q- c% J* M4 V4 p                   or others )

3 {) K4 z5 k2 X- @  y" D) a; d3 @
              Thanks.

super

Dear sir :
+ _2 M8 k, A$ _+ A           Thanks your reply.
4 o+ _7 I; `+ c5 W3 y* q# |            To confirm again ,
          1. It means when I measure use Spectrum Analyser I need to set
              RBW=200Khz start=2Mhz stop=50Mhz,
             if measured power level >-30dBm then it's fail , <-30dBm it's pass.
              Right ?

          2. But my boss tell me it's need below -70dbm not -30dbm , I don't know why.
             If I transfer it to dbm/hz is -83dmb/hz ,it become more severe than -70dbm
3 x! l& r& [* Y. _6 \9 K             and unit also different.
             I don't know which part is wrong ?
( p& `- f& }' f+ [" i7 L6 ?
           Thanks.

cqmyg5

I'm not an expert, I think "set RBW=200khz  and measured spurious below -30dbm is pass" is correct.
I know another spec: -40dBm/1MHz, that's to measure dBm per 100k(RBW=100k)., then sum(10), if below -40dBm is pass.