about dbm/200khz problem..

super

Dear all :
               The doc spec write as below ,
' m* ^0 f, x4 r5 I, {0 k                   Frequency         Emission Level
& y  ^% }1 e: ^6 f                2Mhz to 50Mhz    -30dbm/200khz

             1. what's it mean ?
             2. How should I do when I measure spurious use Spectrum Analyzer ?
1 E/ `- w/ T/ q* Z/ a6 L; ]6 J. `            (ex: set RBW=200khz  and measured spurious below -30dbm is pass ?
                   or others )

9 v& v: I& q) S+ |
              Thanks.

cqmyg5

I'm not an expert, I think "set RBW=200khz  and measured spurious below -30dbm is pass" is correct.
/ J1 ?4 c# j- m0 y$ oI know another spec: -40dBm/1MHz, that's to measure dBm per 100k(RBW=100k)., then sum(10), if below -40dBm is pass.

super

Dear sir :
: g  L1 W; X% g/ ]% U0 u( {! u           Thanks your reply.
8 M! ~5 F% f7 k2 v            To confirm again ,
5 ~& F0 B; Y  C% g, W$ z. c# t          1. It means when I measure use Spectrum Analyser I need to set
              RBW=200Khz start=2Mhz stop=50Mhz,
+ r2 q/ l! b( \- H+ Z1 k+ s. H6 D             if measured power level >-30dBm then it's fail , <-30dBm it's pass.
0 y% q+ u- _- F# y% g& ^              Right ?
! b5 Z( a6 ^$ O9 d5 G2 O
0 x" `  }0 K( s1 C  [: p          2. But my boss tell me it's need below -70dbm not -30dbm , I don't know why.
) g; O) y4 ]3 n3 C+ |             If I transfer it to dbm/hz is -83dmb/hz ,it become more severe than -70dbm
             and unit also different.
             I don't know which part is wrong ?
6 c0 F4 h7 p4 i' ^& W4 F- _
' M6 I8 M  [" z: }           Thanks.