about dbm/200khz problem..

super

Dear all :
5 M* I9 M# |' e- J& u/ g               The doc spec write as below ,
                   Frequency         Emission Level
/ H5 I. O% e" J% T2 e" q( R                2Mhz to 50Mhz    -30dbm/200khz
- V* V5 h6 a' M! b  J4 F3 T1 P
             1. what's it mean ?
; L! a+ q1 Z, {( o8 D$ o, H' o/ O             2. How should I do when I measure spurious use Spectrum Analyzer ?
            (ex: set RBW=200khz  and measured spurious below -30dbm is pass ?
                   or others )


              Thanks.

super

Dear sir :
           Thanks your reply.
( T$ V. X3 N8 G4 J' C- F% q            To confirm again ,
4 D6 d' [: ], m: u* W/ q          1. It means when I measure use Spectrum Analyser I need to set
              RBW=200Khz start=2Mhz stop=50Mhz,
/ V, K- O& v, s2 b* f( w' E1 e             if measured power level >-30dBm then it's fail , <-30dBm it's pass.
* L$ G$ T9 C$ o$ ]! e              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
6 j/ F9 H' ?' x6 {             and unit also different.
             I don't know which part is wrong ?

           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.