Table of Contents
Advertisement
Quick Links
GIANT ELECTRONICS LTD.
Title: Alignment Procedure
Model: L8270
Version
Prepare by
A. PCB LEVEL (Test Condition: under CH1)
NO
ITEM
LCD display
1.
(Should
enter
mode)
2.
Standby current
3.
Talk on current
4
VCO
5.
TX Power
6.
TX Frequency
TX Modulation
7.
& distortion
THE CONTENT OF THIS DOCUMENT IS GIANT ELEC. LTD. INTELLECTUAL PROPERTY AND IS THE PROPERTY OF GIANT. IT IS
TO BE TREATED AS STRICTLY AND IS NOT BE DISCLOSED, REPRODUCED, OR USED EXCEPT AS AUTHORIZED IN WRITING
BY GIANT ELECTRONIC LTD. IN CONNECTION WITH THE MANUFACTURE, MAINTENANCE AND USE OF THE GIANT
EQUIPMENT TO WHICH IT PERTAINS. COPYRIGHT @GIANT ELECT LTD. ALL RIGHTS RESERVED.
tuneup.doc
Dated:
16 January 2006
Check by
ALIGNMENT METHOD
1. Press and hold the '+' key and 'Menu' key together.
2. Turn on the radio power until a good key chirp is heard,
and the backlight is on for about 500 ms. finally, the
LCD should be display '1
test
3. Press 'DOWN' key, then all LCD segments should be
anticlockwise displayed.
4. Finally, all the LCD segments should be shown for
about 500ms as follows: 18
1. Set A-METER, and RX mode @50ohm load.
2. Check the standby current <45mA DC.
1. Set A-METER, and TX mode.
2. Check the talk on current <480mA DC.
1. Set TEST mode.
2. Adjust L113 to provide 0.7 ~2.2VDC at TP103
3. Check TP103 to provide 0.7 ~1.3VDC on Tx mode
CH1.
1. Set TX mode CH1.
2. Check transmit power to provide 19.8dBm ERP.
3. Set TX mode CH11.
4. Check transmit power to provide 19.9dBm ERP.
Adjust C159 to provide 462.5625MHz
1. Set 50mv AF level at TP116; 1KHz,Adjust VR101 to
provide max TX deviation 2.0KHz to 2.35KHz.
2. Check input mic level in 5~15 mV to provide normal
deviation 1.5KHz.
3. Check the demodulation distortion ≤ 5%.
4. Audio Frequency Response
a) Input a 2.0mV 1KHz audio frequency to TP116
and press 'PTT' switch.
b) Check the response compare to 1KHz tone
i) 500Hz: -5.0 dB to –9.0dB.
ii) 2.5KHz: +2.0 dB to + 9.0dB.
Document No.: ENG-
Page 1 of 6
Approved by
CH
' .
88.
.
50Hz at CH1.
±
REMARK
Supply
Voltage=
4.5VDC
Filter Setting
HPF 50Hz
LPF 15KHz
PK +MAX
Advertisement
Table of Contents
Related Manuals for Giant Electronics L8270
Summary of Contents for Giant Electronics L8270
- Page 1 GIANT ELECTRONICS LTD. Title: Alignment Procedure Model: L8270 Document No.: ENG- Dated: 16 January 2006 Page 1 of 6 Version Prepare by Check by Approved by A. PCB LEVEL (Test Condition: under CH1) ITEM ALIGNMENT METHOD REMARK 1. Press and hold the ‘+’ key and ‘Menu’ key together.
- Page 2 GIANT ELECTRONICS LTD. Title: Alignment Procedure Model: L8270 Document No.: ENG- Dated: 16 January 2006 Page 2 of 6 Version Prepare by Check by Approved by A. PCB LEVEL (Test Condition: under CH1) ITEM ALIGNMENT METHOD REMARK 1. Set RX mode CH4.
- Page 3 GIANT ELECTRONICS LTD. Title: Alignment Procedure Model: L8270 Document No.: ENG- Dated: 16 January 2006 Page 3 of 6 Version Prepare by Check by Approved by B. CASING LEVEL ITEM ALIGNMENT METHOD REMARK 1. Set A-METER. 2. With volume switch OFF, check the OFF current <10μA.
- Page 4 GIANT ELECTRONICS LTD. Title: Alignment Procedure Model: L8270 Document No.: ENG- Dated: 16 January 2006 Page 4 of 6 Version Prepare by Check by Approved by B. CASING LEVEL ITEM ALIGNMENT METHOD REMARK 1. Set SG RF level to -50dBm with 1.5kHz Dev.; 1kHz AF, Rotate the volume switch to the position, which give an Max output.
- Page 5 GIANT ELECTRONICS LTD. Title: Alignment Procedure Model: L8270 Document No.: ENG- Dated: 16 January 2006 Page 5 of 6 Version Prepare by Check by Approved by 1. Check the radiated power correlate to golden sample. 2. Plug the dummy speaker and dummy microphone into audio jet.
- Page 6 GIANT ELECTRONICS LTD. Title: Alignment Procedure Model: L8270 Document No.: ENG- Dated: 16 January 2006 Page 6 of 6 Version Prepare by Check by Approved by B. CASING LEVEL ITEM ALIGNMENT METHOD REMARK 1. Turn on the radio power , the backlight should be on For a while and a good key chirp should be heard at The same time.
Need help?
Do you have a question about the L8270 and is the answer not in the manual?
Questions and answers