Audio System; Bluetooth Unit - Icom IP501M Service Manual

5-3 AUDIO SYSTEM

VERIFICATION ITEM
MICROPHONE
1 • Connect the distortion meter and
INPUT LEVEL
~ Microphone
connector~
• Connect the audio generator and
• Set the audio volume level to 21.
• Transmitting
~ D-sub connector~ 2 • Turn off the output of the audio
• Connect the audio generator and
• Transmitting
AUDIO OUTPUT 1 • Turn off the output of the audio
LEVEL (at 10%
distortion) • Turn on the output of the audio
~ Microphone
connector~
• Set the audio volume level to 32.
• Transmitting
2 • Connect the AC millivoltmeter
• Transmitting
~ D-sub connector~ 3 • Turn off the output of the audio
• Turn on the output of the audio
• Connect the AC millivoltmeter
• Transmitting
RESIDUAL NOISE 1 • Turn off the output of the audio
• Set the audio volume level to 1.
• Transmitting

5-4 BLUETOOTH UNIT

VERIFICATION ITEM
TRANSMIT 1 • Enter to the Bluetooth check mode.
OUTPUT POWER
• Connect the spectrum analyzer to
• Transmitting
AF ROUTE 1 • Connect the AC millvoltometer
• Enter the Bluetooth loop back
• Set the audio volume level to 32.
• Transmitting
SETUP
external speaker to the external
speaker jack.
the AC millivoltmeter through the
JIG cable 1 to the microphone
connector, and set it to:
Frequency: 1 kHz (Sine wave)
generator connected to JIG cable 1.
the AC millivoltmeter through the
JIG cable 2 to J502 on the MAIN-A
unit, and set it to:
Frequency: 1 kHz (Sine wave)
generator connected to JIG cable 2.
generator connected to JIG cable 1,
and set it to:
Frequency: 1 kHz (Sine wave)
through the JIG cable 1 to the
AFO terminal of the microphone
connector.
generator connected to JIG cable 1.
generator connected to JIG cable 2.
through the JIG cable 2 to the AFO
terminal of J502 on the MAIN-A unit
generator connected to JIG cable 2.
SETUP
J604 on the MAIN-A unit.
through the JIG cable 1 to AFO
terminal of the microphone
connector.
mode.
OPERATION
• Adjust the audio generator's output
level so that the distortion meter
shows 600 mV rms (±50 mV rms).
• Verify the audio generator's output
level.
• Adjust the audio generator's output
level so that the distortion meter
shows 600 mV rms (±50 mV rms).
• Verify the audio generator's output
level.
• Adjust the audio generator's output
level so that the distortion meter
shows 10%.
• Verify the audio output level.
• Verify the audio output level at the
AFO terminal of the JIG cable 1.
• Verify the audio output level at the
AFO terminal of the JIG cable 2.
• Verify the audio output (residual
noise) level.
OPERATION
• Verify the Bluetooth output power.
• Verify the audio output level at the
AFO terminal of the JIG cable 1.
5-4
VALUE
6.4~12.8 mV rms
212.3~423.7 mV rms
More than 4 V rms
200~300 mV rms
Less than 5 mV rms
VALUE
RF signal is output
40~90 mV rms