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4
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: -113dB
µµ
µµ
µV
No modulation
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 -11dBm 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 LED indication is just vibrated.
Adjustment
L4
(Discriminator
Voltage)
RT2
(RX AF
Voltage)
RT1
(SQ Point)
AC VoltmeterBASE 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
-
+
-
RF Test Point
Base Main PCB
AF Test Point
RT1
RT2
L4
S4
J1
TEL LINE Jack
J4
DC IN 9V Jack
S1
PULSE/TONE Switch
TONE
PULSE
S3
S2
RINGER OFF-ON Switch
ON
OFF