Specifications

4.1.4. Test Procedure
The EUT and simulators are connected to the main power through a line impedance stabilization
network (L.I.S.N.). This provides a 50 ohm /50uH coupling impedance for the measuring equipment.
The peripheral devices are also connected to the main power through a LISN that provides a
50ohm/50uH coupling impedance with 50ohm termination.
The mains voltage shall be supplied to the EUT via the LISN when the measurement of
telecommunication port is performed. The common mode disturbances at the telecommunication port
shall be connected to the ISN.
For A.C. mains conducted interference, measured both sides of A.C. lines and carried out using
quasi-peak and average detector receivers of maximum conducted interference.
For telecommunication port interference measurement, using ISNs with suitable longitudinal conversion
losses (LCL) as defined in the port of specification from manufacture, and the LCL shall be meet the
related standard requirement. Measured the line and carried out using quasi-peak and average detector
receivers of maximum conducted interference.
Conducted emissions were invested over the frequency range from 0.15 MHz to 30 MHz using a
receiver bandwidth of 9 kHz. The equipment under test (EUT) shall be meet the limits in section 4.1.2,
as applicable, including the average limit and the quasi-peak limit when using respectively (A.C. mains
and telecommunication port), an average detector and quasi-peak detector measured in accordance
with the methods described of related standard. Either the voltage limits or the current limits shall be met.
If the average limit is met when using a quasi-peak detector receiver, the EUT shall be deemed to meet
both limits and measurement with the average detector receiver is unnecessary.
If the reading of the measuring receiver shows fluctuations close to the limit, the reading shall be
observed for at least 15 s at each measurement frequency; the higher reading shall be recorded with
the exception of any brief isolated high reading which shall be ignored.
A Test Lab Techno Corp.
Report Number: 1402CE13-01
19 of 153