Specifications

Chapter 5 117
Test Specifications
8 — 12 TX ORFS Due to Modulation at Various Offset Frequencies
8 — 12 TX ORFS Due to Modulation at Various
Offset Frequencies
NOTE These specifications are not used if you are running software on an
HP/Agilent 8922 without a spectrum analyzer.
Description The ORFS Modulation specifications set the Output RF Spectrum
(ORFS) upper limits for a mobile station transmitter’s unwanted power
caused by modulation. These are fixed in the Agilent 83212D software
and are not user editable.
Note that ORFS test TEST_08 is executed using the power control level
set using parameter number 49 TX Power Control Level for
ORFS Tests. See page 162 for details.
NOTE Only GSM power classes 4 and 5, and DCS/PCS power class 1 are
supported. If parameter 49 is in the range of 0 to 4 for GSM, or 29 to 31
for DCS/PCS, then the test produces the following error message:
Power control level not supported by this test. Please
reconfigure parameter 31.
Measurements are made at the following offset frequencies from the
nominal center frequency of the mobile station: 100, 200, 250, 400 kHz
and above 600 kHz up to 1600 KHz. If the upper limit is exceeded, an
“F” is displayed next to the ORFS mod power measurement result.
For greater accuracy of the ORFS measurements, the averaging is done
in software. Minimum values of five averages at the reference level and
two averages at each offset are used by default. Higher numbers of
averages are set using parameter 44 TX ORFS Modulation Meas.
Averages [> 1].
Hardcoded
values
The following hardcoded values are used. Either the relative limit in
dBc or the absolute limit in dBm is taken, whichever is greater.
Frequency offset
100 KHz 200 KHz 250 KHz 400 KHz 600 - 1600
KHz
GSM +0.5 dBc or
-36 dBm
-27.5 dBc or
-34.5 dBm
-32 dBc or
-35 dBm
-51 dBc or
-27 dBm
-60 dBc or
-51 dBm
DCS/PCS
-60 dBc or
-56 dBm