On 17/03/2014 16:01, Jerry Stuckle wrote:
On 3/17/2014 11:58 AM, Jerry Stuckle wrote:
Then why, pray tell, does the several $K Sencore signal analyzer sitting
on the back shelf (because it's now pretty much obsolete) say "dbm"? It
has been that way since I first started with MATV systems back in the
early 70's. It's so common many cable techs wouldn't know there even is

I can't comment onyour Sencore signal analyzer as I have never used one,
BUT every other signal generator and spectrum analyser I have come
across and used, from HP/Agilent, R&S, MI etc etc when labelled dBm mean
dB relative to a milliwatt. Also every other RF engineer I have come
across universally understands dBm to mean dB relative to a milliwatt
NOT dBmV.

Just check the specs of any rf test gear line you will see that they
refer to dbm meaning dB relative to a milliwatt. Even Sencore's website
with the specs of their latest equipment, Where they mean dBuV or dBmV
they say so.

Jeff