Programming instructions

RFI GLOBAL SERVICES LTD TEST REPORT
S.No. RFI/EMCE1/RP47590JD01A
Page 22 of 34
Issue Date: 04 October 2005
Test of: Psion Teklogix.
8530 Venicle Mount Computer.
To: 95/54/EC: 1995
ESA Approval Annex VII and Annex VIII, Emissions
9. Measurement Methods
9.1. Radiated Narrow Band Emissions: Annex VIII.
These measurements were performed in accordance with the standard, against appropriate limits for
narrow band emissions using an average detector.
Initial scans covering the entire band in a shielded enclosure were performed in order to identify
frequencies on which the EUT was generating interference. This determined the frequencies on
which the EUT should be re-measured in full on the open area test site. A peak detector was used in
conjunction with the appropriate detector IF measuring bandwidth (see table below), repetitive scans
were performed to allow for emissions with low repetition rates, and for the duty cycle of the EUT.
The test configuration was the same for the initial scans as for the final measurements on a 1.0 m
high non-conducting table, (this table may or may not have an earthed metallic ground plane,
depending on the earthing requirements of the EUT). These initial scans were performed with the
antenna in both horizontal and vertical polarisations.
All measurements were performed using an antenna height of 1.05 m and a measurement distance
of 1.0 m (measured from the table edge to the nearest point of the measuring antenna). Following
the initial scans, graphs were produced giving an overview of the emissions from the EUT plotted
against the appropriate specification limit. A tolerance line was set 10 dB below the reference limit
and levels above this were re-tested on the open area test site using a measuring receiver with a
peak detector.
For the main (final) measurements the EUT was arranged on a 1.0m high non-conducting table, (this
table may or may not have an earthed metallic ground plane, depending on the earthing requirements
of the EUT), on an open area test site as detailed in the specification.
All measurements on the open area test site were performed with a broadband antenna.
The test equipment settings for radiated narrowband emissions measurements were as follows:
Receiver Function Initial Scan Final Measurements
Detector Type: Peak Peak
Mode: Max Hold Not applicable
Bandwidth: 120 kHz 120 kHz
Amplitude Range: 60 dB 20 dB
Measurement Time: Not applicable >1 s
Observation Time: Not applicable >15 s
Step Size: Continuous sweep Not applicable
Sweep Time: Coupled Not applicable
05-Oct-2005