I'd like to thank all those who replied so far.
According to MIL-STD-462D:
4.9.2 Operating frequencies for spread spectrum equipment.
Operating frequency requirements for two major types of spread spectrum
equipment shall be as
follows:
a. Frequency hopping. Measurements shall be performed with the EUT
utilizing a hop set
which contains a minimum of 30% of the total possible
frequencies. This hop set shall
be divided equally into three segments at the low, mid, and
high end of the EUT's
operational frequency range.
b. Direct sequence. Measurements shall be performed with the EUT
processing data at the
highest possible data transfer rate.
Can I interpret this section to mean that when scanning for emissions,
standard MIL-STD scanning methods apply?
Aaron
Aaron S. Low
Systems Engineer
Naval Electronics and Surveillance Systems
EP5 D5 MD45 Syracuse, NY 13221-4840
Phone: (315) 456-1203 Fax: (315) 456-0509
L
From: Low, Aaron S [mailto:[email protected]]
Sent: Wednesday, March 19, 2003 10:44 AM
To: [email protected]
Subject: antenna port conducted emissions
Folks,
I am interested in your opinions regarding antenna port conducted emissions
(MIL-STD-461D CE106) on a spread spectrum/frequency hopping device.
Is it practical to automatically measure (using a swept scan EMI receiver)
emissions from such a device? I would think that when using spread spectrum
and a swept scan receiver, the receiver has some large probability of
missing the emissions caused by a particular harmonic when using swept
scanning systems.
The limit for CE106 (transmitters) is derived from the power of the
fundamental (there is no fundamental, only a band of operation), how do you
measure that power on the EMI receiver?
Does anyone have any experience/advice they would be willing to part with?
Thanks
Aaron Low
ps. I am relatively new to this field, so my question may seem very basic
to many of you; please excuse me.
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