User's Manual Part 2

RBS 2308 and RBS 2309 User’s Guide

6. Observe the trace i

n the frequency range according to the table below.

Table 22 Measurement Frequency Range for Passive Antenna Systems

System Start Freq. (MHz) Stop Freq. (MHz)

GSM 800

824 894

E-GSM 900

880 960

P-GSM 900

890 960

GSM 1800

1710 1880

GSM 1900

1850 1990

7. Check that no SWR levels are over 1.4 (= 15.6 dB RL) or 1.5 (= 14 dB RL)

for low loss feeders, between the frequencies stated in the table above. For

conversion between VSWR and Return Loss see Table 24 on page 107.

Enter the

test result in the test record. For examples of approved and

unapproved waveforms, see figures below.

8. Create a unique trace name in accordance with Section 6.8 Naming an

SWR Measurement on page 103. Save the measurement by pressing

the SAVE DISPLAY key. Type in the trace name using the alphanumeric

soft keys, and press ENTER.

9. Repeat the SWR test for each feeder on the site.

Example of an Acceptable SWR Measurement

P010265A

CAL ON LIM ON 259 POINTS RECALL

2.00

1000.0FREQ (MHz)800.0

1.00

M3=OFFM1:1.03,889.9MHz

M4=OFFM2:1.19,959.7MHz

ALL

OFF

SWR ANTENNA 900

1.4

Figure 44 Example of an Acceptable SWR Measurement

102

EN/LZT 720 0027 Uen R8A 2006-06-27