about dbm/200khz problem..

super

Dear all :
               The doc spec write as below ,
                   Frequency         Emission Level
" m" b7 n( h* A8 b* D4 ?                2Mhz to 50Mhz    -30dbm/200khz

             1. what's it mean ?
             2. How should I do when I measure spurious use Spectrum Analyzer ?
: T6 M" \2 ?0 _6 |" I  m3 s3 m+ U/ m8 V            (ex: set RBW=200khz  and measured spurious below -30dbm is pass ?
+ o& Z) g* F5 w8 ]6 {/ T+ I1 j                   or others )
) E& Q! q( E2 ~2 L$ ]' T! O
6 w7 n+ l8 Z7 E
              Thanks.

super

Dear sir :
$ A! U% D& R, t  o1 X           Thanks your reply.
            To confirm again ,
. u: A' m* X) i! d7 f, ?          1. It means when I measure use Spectrum Analyser I need to set
& Z3 D7 [$ _1 I; c, l: Y5 V8 @8 x              RBW=200Khz start=2Mhz stop=50Mhz,
1 v% q( c' ~" A  b; i7 v" d0 M             if measured power level >-30dBm then it's fail , <-30dBm it's pass.
/ h0 Y+ L  S" r              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 K" I/ C, E7 ~             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.
0 h5 D) @! u5 r5 b  c# YI know another spec: -40dBm/1MHz, that's to measure dBm per 100k(RBW=100k)., then sum(10), if below -40dBm is pass.