about dbm/200khz problem..

super

Dear all :
               The doc spec write as below ,
                   Frequency         Emission Level
* G5 p& k" S6 K7 p                2Mhz to 50Mhz    -30dbm/200khz
0 G  l0 V! ~; {/ Z4 A7 ?
1 R2 N, Y5 S, S5 _             1. what's it mean ?
             2. How should I do when I measure spurious use Spectrum Analyzer ?
  W! C8 ?( [1 R; W% M$ M            (ex: set RBW=200khz  and measured spurious below -30dbm is pass ?
5 g3 B& A6 N& s" P. K7 ^4 H- J5 o$ N                   or others )


9 o( Z1 K4 H3 j: M1 ~7 Q              Thanks.

cqmyg5

I'm not an expert, I think "set RBW=200khz  and measured spurious below -30dbm is pass" is correct.
2 J6 X/ ~/ K  lI 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 :
2 g' ?$ ^! L8 u           Thanks your reply.
            To confirm again ,
# @# {  u* P! G' ?# {- h$ t! J          1. It means when I measure use Spectrum Analyser I need to set
              RBW=200Khz start=2Mhz stop=50Mhz,
  W' o0 p$ q! D' r) j9 A" Z             if measured power level >-30dBm then it's fail , <-30dBm it's pass.
              Right ?
# h* o/ P: |0 ]" O: f6 b7 M  p
! @$ @+ y) }  f9 K          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
             and unit also different.
             I don't know which part is wrong ?
7 I* I9 x% p% N
2 B- y5 c  S  G3 [$ I. E           Thanks.