– 16 –
SECTION 4
ELECTRICAL ADJUSTMENTS
Precedure:
• Connect a voltmeter to U1
!¢
and GND.
• Adjust C151 so that QUAD-TUNE VOLTAGE is 2.2 ± 0.1 V.
4-1.
BASE UNIT SECTION
• Make the set in Test Mode (See page 14)
1. TX LOOP VOLTAGE check
Setting:
Precedure:
• Connect a voltmeter to TP4 (TX-LOOP-VOLTAGE) and GND.
• Check the value of voltmeter is 1.4 ± 0.6 V.
2. TX POWER check
Setting:
Precedure:
• Connect a level meter to TP (ANT) and GND.
• Check the level of level meter is –5 ± 0.5 dB.
Precedure:
• Connect a voltmeter to TP3 (RX-LOOP-VOLTAGE) and GND.
• Check the value of voltmeter is 1.4 ± 0.6 V.
4. QUAD-TUNE VOLTAGE adjustment
Setting:
3. RX LOOP VOLTAGE check
Setting:
Adjustment Location:
[BASE MAIN BOARD] (SIDE A)
[BASE MAIN BOARD] (SIDE B)
+
–
digital voltmeter
TP4 (TX-LOOP-VOLTAGE)
GND
+
–
level meter
TP (ANT)
GND
+
–
digital voltmeter
TP (RX-LOOP-VOLTAGE)
GND
+
–
digital voltmeter
U1
!¢
GND
TP
(ANT)
U1
U3
U12
14
C151
F3
TP3 (RX-LOOP-VOLTAGE)
TP4
(TX-LOOP-VOLTAGE)
Содержание SPP-935 - 900 Mhz Cordless Phone
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Страница 27: ... 37 38 SPP 935 5 11 PRINTED WIRING BOARD HAND MAIN Section Page 40 ...