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PANASONIC EB-GD50
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of PANASONIC EB-GD50 Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages: English

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Text excerpt from page 55 (click to view)
TEST AND MEASUREMENT
3. 4. 5. If the carrier leakage ratio is greater than 35 dBc then unit is OK. (offset calibration is complete). If not then repeat steps 1, 2 and 3 above for Qch offset values: 87, 67, 47, 27, 7. If the carrier leakage ratio is still less than 35 dBc then unit is a fail.

Q Inc Calibration
1. 2. 3. 4. 5. Set Qch offset to 167 (see Qch Check step 2). Measure carrier leakage ratio. If carrier leakage ratio is greater than 35 dBc then unit is OK. (offset calibration is complete). If carrier leakage ratio is less than 35 dBc then repeat steps 1, 2 and 3 above for Qch offset values:187, 207, 227, 247. If carrier leakage ratio is less than 35 dBc then unit is a fail.

I, Qch Gain
IMPORTANT: I, Qch offset calibration should be done before this calibration. 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 1 appears in the highlighted field. Press ENTER. 2. Using the spectrum analyser measure the image leak ratio. Image leak ratio is the measured ratio of peak power and the power at 135 kHz below peak frequency.

Example: peak power (902.468 Mhz) = 33 dBm power at 135 kHz below peak power = -9 dBm image leak ratio = 33 dBm - (-9 dBm) = 42 dBm

Figure 6.31: Image leak ratio 3. 4. If image leak ratio is greater than 30 dBc then unit is OK. (offset calibration is complete). If image leak ratio is less than 30 dBc then go to Ich gain calibration.

MCUK991001C8 Service Manual

Section 6 � 49 �

Issue 1 Revision 0

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