Panasonic G600 Service Manual page 71

TEST AND MEASUREMENT
Qch Check
1. Set Ich offset to 127.
2. Set Qch offset to 147.
a) At the Channel box press F6.
b) (Figure 26) Press move down arrow until QCH OFFSET appears in the field. Press ENTER.
c) (Figure 27) Enter 3 into the data field and press enter.
3. Measure the new carrier leakage ratio.
4. If the carrier leakage ratio is greater than 30dBc the unit is OK. (offset calibration is complete).
5. If the original carrier leakage ratio (see I, Q ch Offsets step 2) is greater than new carrier leakage ratio then go
to Q Dec Calibration.
6. If the original carrier leakage ratio is less than new carrier leakage ratio then go to Q Inc Calibration.
Q Dec Calibration
1. Set Qch offset to 107 (see Qch Check step 2).
2. Measure carrier leakage ratio.
3. If the carrier leakage ratio is greater than 30dBc then unit is OK. (offset calibration is complete).
4. If not then repeat steps 1, 2 and 3 above for Qch offset values: 87, 67, 47, 27, 7.
5. If the carrier leakage ratio is still less than 30dBc then unit is a fail.
Q Inc Calibration
1. Set Qch offset to 167 (see Qch Check step 2).
2. Measure carrier leakage ratio.
3. If carrier leakage ratio is greater than 30dBc then unit is OK. (offset calibration is complete).
4. If carrier leakage ratio is less than 30dBc then repeat steps 1, 2 and 3 above for Qch offset values:187, 207,
227, 247.
5. If carrier leakage ratio is less than 30dBc then unit is a fail.
Issue 1
Revision 0
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Section 7
7 - 18
MCUK980101C8
Service Manual