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SECTION 5 ELECTRICAL ADJUSTMENTS
5-1. BASE UNIT SECTION
3. Checking TX Output Setting:
peak power meter
� Make the set in Test mode (see page 16) 1. Checking RX I&Q Output Level Setting:
oscilloscope + � level meter + � TP558: RXIP TP557: RXIN TP556: RXQP TP555: RXQN TP567: GND
SSG
+ �
ANTENNA TERMINAL
ANTENNA TERMINAL
Procedure: 1. Place the base unit in the Continuous Transmit more (CH1, High power). 2. Measure the ANT OUT output of the RF module in the base unit using a peak power meter. 3. Confirm that the measured output is 85 mW (MIN 30 mW). 4 .Also, execute steps 1 through 3 for the channels 10 and 20. CH10: 80 mW (MIN 25 mW) CH20: 80 mW (MIN 25 mW)
Procedure: 1. Place the base unit in the Continuous Receive mode (CHI, LNA ON, AGC ON). 2. Set the SSG frequency to the frequency on CHI + 300 kHz, and the RF output level to - 95 dBm. 3. Measure the output level of RXIN, RXIP, RXQN, and RXQP with a level meter. At this time, confirm with an oscilloscope that a sine wave of 300 kHz is output. 4. Confirm that the measured output level is -25.0 to -19.0 dB V. IF IC501 was replaced (there is no ID data), the output level is 30.0 to -24.0 dB V. 5. Also, execute steps 1 through 4 for the channels 10 and 20. * For the frequency on each channel, see page 13. 2. Checking TX Center Frequency Setting: � short: TP515� TP567 (GND)
frequency counter + � ANTENNA TERMINAL
Procedure: 1. Short TP515 (GND) and TP567 (GND) on the BASE MAIN board in the base unit. 2. Place the base unit in the Continuous Transmit more (CH1, High power). 3. Measure the ANT OUT frequency of the RF module in the base unit using a frequency counter. 4. Coufirm that the measured frequency is 904.200 MHz ± 27kHz. 5. Also, execute steps 1 through 4 for the channels 10 and 20.
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