about dbm/200khz problem..

super

Dear all :
               The doc spec write as below ,
# z% ^. i3 l( D2 Z0 T                   Frequency         Emission Level
                2Mhz to 50Mhz    -30dbm/200khz

# M. H) ^6 r% f6 `$ I4 V             1. what's it mean ?
. g: N3 F* F! b$ O. h+ l; M             2. How should I do when I measure spurious use Spectrum Analyzer ?
            (ex: set RBW=200khz  and measured spurious below -30dbm is pass ?
6 H/ s* P5 ~* Z# `6 [+ [                   or others )

/ X' b: C4 `2 r- J) ]! Z
( b, g& L2 F4 G! f) Z              Thanks.

super

Dear sir :
           Thanks your reply.
) \  _+ F5 o8 y0 G4 ^, ?" Q( x            To confirm again ,
          1. It means when I measure use Spectrum Analyser I need to set
: M6 x; E$ G5 ?. ^5 u              RBW=200Khz start=2Mhz stop=50Mhz,
             if measured power level >-30dBm then it's fail , <-30dBm it's pass.
6 i0 H& l7 W' @. t" r3 d              Right ?
* f9 w, _& ]' e- E, Q
4 |. G4 j+ e. L" K4 r4 P; g* a4 ^; i          2. But my boss tell me it's need below -70dbm not -30dbm , I don't know why.
' c2 r7 u+ w/ Z) v& b2 Q9 X& Z             If I transfer it to dbm/hz is -83dmb/hz ,it become more severe than -70dbm
9 c  H; x3 O8 Q* x6 d  F$ U) ?. [             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.