about dbm/200khz problem..

super

Dear all :
               The doc spec write as below ,
                   Frequency         Emission Level
# Z: Q4 F: w0 v; ]) k' B2 C                2Mhz to 50Mhz    -30dbm/200khz

5 R6 y/ ]/ s0 U. I9 [             1. what's it mean ?
) ~/ e( G; J, I4 R5 L             2. How should I do when I measure spurious use Spectrum Analyzer ?
; [; ^8 Y  O$ X  J4 P% ]$ @            (ex: set RBW=200khz  and measured spurious below -30dbm is pass ?
                   or others )
4 x9 z8 s# J1 v; f/ y; Q
& R3 V- u# ~1 [6 c5 m! ]
              Thanks.

super

Dear sir :
, x" j1 D# [/ d6 I; z           Thanks your reply.
7 |" m' X/ C5 E' t& s9 Y            To confirm again ,
          1. It means when I measure use Spectrum Analyser I need to set
              RBW=200Khz start=2Mhz stop=50Mhz,
7 D5 X8 H# g( v' i" R, F$ D4 y             if measured power level >-30dBm then it's fail , <-30dBm it's pass.
) n+ G* g0 p3 ?% y0 N2 ~- v1 e% j              Right ?

          2. But my boss tell me it's need below -70dbm not -30dbm , I don't know why.
" H) o. ?; j$ Z2 f             If I transfer it to dbm/hz is -83dmb/hz ,it become more severe than -70dbm
             and unit also different.
% }: h0 H: |/ R4 G/ t& \$ A/ R             I don't know which part is wrong ?

9 {. A9 o3 w  B3 p           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.