User`s guide

83
Appendix A - Establishing Absolute GSM BCH Power Level
Procedure
7 Set the Traffic Chan field to . This will remove the pulsing from the
BCH channel.
8 On the front panel of the HP/Agilent 8922, press to select to Cell Configura-
tion screen.
9 Set the GSM BCH Atten.field to .
10 Change the top left field to . This will change the BCH modulation to
all 1’s.
11 On the front panel of the HP/Agilent 8922, press Press (RFG/RFA).
12 From the Mod Source menu set the GMSK field to . This will turn the BCH
modulation off, so that the BCH is a clean CW signal.
HP/Agilent 8560 Series Set up and Measurement
1 Set the spectrum analyzer test frequency.
a Press key.
b Press softkey CENTER FREQ and enter 939 MHz ( )
2 Set the spectrum analyzer test span.
a Press key.
b Press softkey SPAN and enter 1 MHz ( )
3 Set the spectrum analyzer attenuation and reference level.
a Press key.
b Press softkey ATTEN to change setting to MAN.
c Enter 0 dB ( )
d Press softkey REF LVL, then using the arrow keys ( ), move the signal peak
to the highest graticule. Change the graticule scale if neccessary.
WARNING: Once these settings have been made, the spectrum analyzer is now vulnerable to
overload damage.
4 To obtain a peak GSM BCH power level value, press and read the value
given at the top of the spectrum analyzer display.
ON/OFF
CELL
CONFIG
0 dB
Settable
SHIFT
CELL
CNTL
Off
FREQUENCY
9 3 9
MHz
-dBm
sec
SPAN
1
MHz
-dBm
sec
AMPLITUDE
0
GHz
+dBm
dB
PEAK
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