11
6. Code Deviation Check
Setting:
Procedure:
1. Connect a deviation meter to TP (ANT) and TP (GND) on the
BASE MAIN board.
2. Press the
[HANDSET LOCATOR]
key (S1) once to change
the test mode step to TX DATA.
3. Check that the value of deviation meter is 6 kHz to 10 kHz.
– RX Adjustments and Checks –
1. DISCRI Voltage Adjustment
Setting:
Procedure:
1. Connect a SSG to TP (ANT) and TP (GND) on the BASE
MAIN board.
2. Connect a digital voltmeter to TP (DISCRI) and TP (GND) on
the BASE MAIN board.
3. Set the
[DIAL MODE]
switch (S2) to the
[PULSE]
position.
4. Press the
[HANDSET LOCATOR]
key (S1) three times to change
the test mode step to RX SENS.
5. Adjust L3 on the BASE MAIN board so that the value of digi-
tal voltmeter becomes 1 V
±
0.05 V.
2. TEL Out Level Adjustment
Setting:
+
–
deviation meter
TP (ANT)
TP (GND)
SSG
Carrier frequency: 902.952467 MHz
Modulation: no modulation
Output level: – 47 dBm
TP (ANT)
TP (GND)
+
–
digital voltmeter
TP (DISCRI)
TP (GND)
Procedure:
1. Change the modulation of SSG to 1 kHz,
±
8 kHz deviation.
2. Connect a noise meter to the LINE jack (J1) on the BASE
MAIN board.
3. Adjust RT2 on the BASE MAIN board so that the value of
noise meter becomes 265 mV
±
10 mV.
3. Distortion and S/N Ratio Check
Setting:
Procedure:
1. Connect a distortion meter to the LINE jack (J1) on the BASE
MAIN board.
2. Set the CCITT of noise meter on.
3. Check that the value of distortion meter is less than 4%.
4. Check that the value of noise meter, and record it.
5. Change the modulation of SSG to no modulation.
6. Check that the value of noise meter again. And check that dif-
ference of level between in step3 and in step5 is more than
60 dB.
4. RX Sensitivity Check
Setting:
Procedure:
1. Connect a SINAD meter to the LINE jack (J1) on the BASE
MAIN board.
2. Change the output level of SSG to –111 dBm, and change the
modulation to 1 kHz
±
8 kHz devition.
3. Check that the value of SINAD meter is more than 12 dB.
SSG
Carrier frequency: 902.952467 MHz
Modulation: 1 kHz,
±
8 kHz deviation
Output level: – 47 dBm
TP (ANT)
TP (GND)
noise meter
600
Ω
+
–
LINE jack (J1)
SSG
Carrier frequency: 902.952467 MHz
Modulation: 1 kHz,
±
8 kHz deviation
Output level: – 47 dBm
TP (ANT)
TP (GND)
LINE jack (J1)
600
Ω
noise meter
CCITT: on
+
–
+
–
distortion meter
SSG
Carrier frequency: 902.952467 MHz
Modulation: 1 kHz,
±
8 kHz deviation
Output level: –111 dBm
TP (ANT)
TP (GND)
600
Ω
+
–
SINAD meter
LINE jack (J1)
