Panasonic EB-GD30 - Manual (Page 52)

TEST AND MEASUREMENT
Issue 1 Section 6 MCUK991001C8
Revision 0 – 46 – Service Manual
2. On the spectrum analyser measure the carrier leakage ratio. Carrier leakage ratio is measured as the ratio of peak power
and the power at 68 kHz below peak frequency.
Example:
peak power (902.468 MHz) = 33 dBm
power at 135 kHz below peak power = -9 dBm
carrier leakage ratio = 33 dBm - (-9 dBm) = 42 dBm
Figure 6.26: Carrier leakage ratio
3. If carrier leakage ratio is greater than 30 dBc then unit is OK. (offset calibration is complete).
4. If carrier leakage ratio less than 30 dBc then go to ‘Ich Gain Caliibration’.
Ich check
1. At the Channel box check Ich offset data by selecting F7 then VIEW TRIM OTHER.
Figure 6.27: I, Q data field selection 1