about dbm/200khz problem..

super

Dear all :
               The doc spec write as below ,
% d2 ^" ]' a0 v+ f: o9 z' C                   Frequency         Emission Level
7 M* m/ L  o( {& o                2Mhz to 50Mhz    -30dbm/200khz
' G" x. w% _# d( D. u! F
             1. what's it mean ?
( }+ K: X9 D9 |2 e) X             2. How should I do when I measure spurious use Spectrum Analyzer ?
7 t! `' Z- w1 ^  x            (ex: set RBW=200khz  and measured spurious below -30dbm is pass ?
! i  h4 M" L1 v0 F9 d                   or others )

) t% O5 Q8 L0 |: c  a
( H/ i; [% O1 E5 W* C, [; `              Thanks.

super

Dear sir :
1 D2 K7 f2 G& k4 y( }! c" W           Thanks your reply.
5 l! O' l  V6 D+ \! Z            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 ?
* b' R2 V# X0 r
! {* t: i- v8 f' b* h8 }          2. But my boss tell me it's need below -70dbm not -30dbm , I don't know why.
2 u8 f2 b% o, p* O             If I transfer it to dbm/hz is -83dmb/hz ,it become more severe than -70dbm
             and unit also different.
( W" @* e2 A/ O2 r: F+ a, v. j             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.
. g* V4 |% E+ t! fI know another spec: -40dBm/1MHz, that's to measure dBm per 100k(RBW=100k)., then sum(10), if below -40dBm is pass.