6
Receiver Section
Connections
Alignment Point Location on Base Main PCB and Base RF PCB
Preset
Place the Base Unit in RX SENS mode (step 4) in accordance with the precedure on page 3.
Alignment Procedure
step
1
2
3
Preset to
SG: 1mV
No modulation
SG: 1mV
1 kHz ±8kHz
deviation
SG: -6.0 dB
µµµµµ
V
1kHz ±8kHz
Deviation
Remarks
Connect the RF Signal Generator to the RF test point on the Base MAIN
PCB. Make sure that the frequency is 902.952467 MHz.
Connect the DC Voltmeter to the AF test point. Adjust L4 to indicate DC
1.00 V.
Connect the AC Voltmeter across a 600-ohm dummy to the Telephone Line
Jack. Adjust RT2 for a 245 mV reading on the AC voltmeter.
Press the “PAGE” key to enter the TEST Mode 5. Make sure that the
frequency of RF SG output is 902.952467 MHz. Adjust RT1 to turn to the
point where the bell rings.
Adjustment
L4
(Discriminator
Voltage)
RT2
(RX AF
Voltage)
RT1
(SQ Point)
AC Voltmeter
BASE Unit
AF
Test Point
Dummy Load
(600-ohm)
RF SG
AC 120V
60Hz
J4
DC IN 9V Jack
+
RF
Test Point
J1
TEL Line
Jack
AC
Adapter
DC Voltmeter
-
+
-
S2
T/P Switch
RT2
P
T
RF Test Point
RT1
J4
DC IN 9V Jack
J1
TEL LINE Jack
L4
Base Main PCB
AF Test Point
Содержание FT-8939
Страница 2: ...CORDLESS TELEPHONE SERVICE MANUAL FILE NO 2B0 9904 FT 8939 PUBLISHED IN JAPAN Sep 1999 ...
Страница 11: ...9 BLOCK DIAGRAMS Base Unit Main ...
Страница 12: ...10 Base Unit DSP ...
Страница 13: ...11 Handset ...
Страница 14: ...12 13 SCHEMATIC DIAGRAMS Base Unit Main ...
Страница 15: ...14 15 Base Unit Key ...
Страница 16: ...16 17 Handset ...
Страница 33: ...34 ELECTRICAL PARTS LOCATION Base Unit Main PCB ...
Страница 34: ...35 Base Unit Key PCB ...
Страница 35: ...36 Handset Main PCB ...
Страница 36: ...37 38 WIRING DIAGRAMS Base Unit ...
Страница 37: ...39 Handset ...
Страница 40: ...42 Handset 7 8 4 1 16 17 17 5 10 15 11 12 2 9 6 13 14 3 17 MAIN PCB ASSY RF MODULE HANDSET ...
Страница 62: ......