GIANT ELECTRONICS LTD.
Title: Alignment Procedure
Model: T5025/T5525
Version:
00
THE CONTENT OF THIS DOCUMENT IS GIANT ELCT.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 WHICH IT PERTAINS. COPYRIGHT @GIANT ELECT. LTD, ALL RIGHTS RESERVED
tuneup.doc
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A. PCB LEVEL (Test Condition: under CH8)
N O
ITEM
ALIGNMENT METHOD
REMARK
10.
VOX Detector
(For T5525)
1.Set VOX level at 1.
2.Set AF level at 15.4 +/-0.2 mV,1KHz at TP116.
3. Unit start to transmit.
4.Set AF level at 13.5 +/-0.2 mV,1KHz at TP116.
5.Unit start to transmit.
6. Set VOX level at 2.
7.Set AF level at 9.4 +/-0.2 mV,1KHz at TP116.
8.Unit start to transmit.
9.Set AF level at 5.8 +/-0.2 mV,1KHz at TP116.
10.Unit start to transmit.
11.Set VOX level at 3.
12.Set AF level at 4.0 +/-0.2 mV,1KHz at TP116.
13.Unit start to transmit.
14.Set AF level at 2.7 +/-0.2 mV,1KHz at TP116.
15.Unit start to transmit.
11.
Rx Audio test
1. Set RX mode CH7.
2. Set SG RF level to –50dBm with 1.5KHz deviation
1KHz modulation Signal.
3. Rotate the volume switch to the position, which give a
Max audio output at TP117.
4. Check Max audio output level >1300mV.
5. Check Rx current <150mA.
6. Check the 1KHz distortion <= 5%.
7. Set SG RF level to –119dBm with 1.5kHz deviation at
1KHz audio frequency.
a). Check SINAD sensitivity <= -119dBm.
@12dB SINAD at TP117.
8. Audio frequency response.
a) Set SG RF level to –50dBm with 1.5kHz deviation at
1KHz audio frequency.
b) Rotate the volume switch to the position, which give
an output 100mV
±
5mV at TP117.
c) Vary the audio frequency from 300Hz to 3KHz.
d) Check the RX response compare to 1KHz tone.
i)
500Hz : +1.0 dB to +5.0 dB .
ii)
2.5KHz : -10.0 dB to –18.0 dB.
9. Maximum and Minimum Audio Output Power.
a) Set SG RF level to –50dBm with 1.5kHz deviation at
1KHz audio frequency.
b) Rotate the volume switch to the position, which give a
maximum output .
c) Check the voltage at TP117 >/=1500mV.
d) Set maximum audio output to 0dB, rotate the volume
switch to the position, which give a minimum output.
e) Check the minimum voltage -23dB to -40dB at TP117
12.
Noise- Detector
1. Set SG to –120dBm with 1.5KHz deviation., 1KHz AF
on CH7.
2. Adjust VR102 for t ransient state @ 10dB SINAD.
3. Check high state @8 to 13dB SINAD.