Panasonic EB-GD30 - Manual (Page 51)

TEST AND MEASUREMENT
MCUK991001C8 Section 6 Issue 1
Service Manual – 45 – Revision 0
17. Repeat steps 6 to 15 for GSM 1800 on the channels listed below:.
NOTE: The AGC1 setting for GSM 1800 RSSI calibration should be 51 dBm.
6.5.3 I and Q Values
NOTE: With the I, Qch adjustment procedures the transmitter must be set to Power Level 5 (this presents the worst case
of non-linearity) so care must be taken that the spectrum analyser used can accept a signal input of 33 dBm. If
not an appropriate attenuator must be used.
I, Q ch Offsets
Spectrum Analyser setup
centre frequency = 902.4 MHz
RBW = 10 kHz
VBW = 10 kHz
span = 1 MHz
sweep time = 2 sec
1. Set the Channel box controls to channel 62 at power level 5, normal burst modulated with all 1’s.
a. Press the down arrow until CHANGE CH > is highlighted and then press ENTER.
b. Press the down arrow until PL is highlighted. Press ENTER.
c. Press the down arrow until TX DATA is highlighted. Press the move arrow until “NRL 1” appears in the highlighted field.
d. Press ENTER.
Figure 6.25: Channel box setup
Channel GSM 1800
Bch 586
Lch 681
Mch 731
Hch 861
Tch 878