Gsm Transmitter Tunings; Tx Iq Tuning (Gsm) - Nokia n81 Service Manual
Hide thumbs
Also See for n81:
- User manual (148 pages) ,
- Get started (20 pages) ,
- Let's get started (20 pages)
Table of Contents
Advertisement
Ch. 37 / 942.46771 MHz
Ch. 90 / 953.06771 MHz
Ch. 114 / 957.86771 MHz
Ch. 124 / 959.86771 MHz
Ch. 136 / 962.26771 MHz
GSM1800
Ch. 497 / 1802.26771 MHz
Ch. 512 / 1805.26771 MHz
Ch. 535 / 1809.86771 MHz
Ch. 606 / 1824.06771 MHz
Ch. 700 / 1842.86771 MHz
Ch. 791 / 1861.06771 MHz
Ch. 870 / 1876.86771 MHz
Ch. 885 / 1879.86771 MHz
Ch. 908 / 1884.46771 MHz
GSM1900
Ch. 496 / 1927.06771 MHz
Ch. 512 / 1930.26771 MHz
Ch. 537 / 1935.26771 MHz
Ch. 586 / 1945.06771 MHz
Ch. 661 / 1960.06771 MHz
Ch. 736 / 1975.06771 MHz
Ch. 794 / 1986.66771 MHz
Ch. 810 / 1989.86771 MHz
Ch. 835 / 1994.86771 MHz
12. If the values are within the limits, click Next to continue to the next band.
Next actions
Repeat the steps 8 to 12 for GSM1800 and GSM1900.
GSM transmitter tunings
Tx IQ tuning (GSM)
Context
The Tx path branches to I and Q signals at RF I/Q modulator. Modulator and analog hardware located after
it cause unequal amplitude and phase disturbance to I and Q signal paths. Tx IQ tuning balances the I and Q
branches.
Page 4 –38
COMPANY CONFIDENTIAL
Copyright © 2007 Nokia. All rights reserved.
Min
Typ
-2
0
-2
0
-3
0
-3
0
-6
-1
-6
-1
-3
0
-3
0
-3
0
-3
0
-3
0
-3
0
-3
0
-6
-1
-6
-1
-3
0
-3
0
-3
0
-3
0
-3
0
-3
0
-3
0
-6
-1
RM-179; RM-223
RF troubleshooting
Max
Unit
2
dB
2
dB
2
dB
2
dB
2
dB
3
dB
3
dB
3
dB
3
dB
3
dB
3
dB
3
dB
3
dB
3
dB
2
dB
2
dB
2
dB
2
dB
2
dB
2
dB
2
dB
2
dB
2
dB
Issue 1
Advertisement
Chapters
Table of Contents
Troubleshooting
