TURN-UP INFORMATION
MODEL: R8
1. TRANSCEIVER SETTING
A) Power Supply: By using three pieces of AAA size battery, the nominal power supply voltage is 3.6V, the operating voltage
can be ranged from3.3V to 4.5V.
B) TX/RX Channel Setting：
Press and hold the MENU PWR key for 3 seconds to switch on the transceiver. At standby mode, the primary digit displays
the channel number and supplemental digit displays the CTCSS / DCS number.
Press the MENU PWR key one time, the CH will flash, then press or to select the Channel and press PTT to
confirm and back to receiving mode interface.
C) CTCSS/DSC Number Setting
Press the MENU PWR key two time, the sub-channel will flash, then press or to select the CTCSS or DCS and
press PTT to confirm and back to receiving mode interface. Press and hold the MENU PWR key for 3 seconds to switch off
the transceiver, press PTT key to confirm and back to receiving mode interface.
2. TRANSMIT
A) Press and hold the “PTT”button while speaking at about 5cm from the microphone for transmission. LCD will display
out TX icon. Release the “PTT”button to return to standby mode.
B) Press the MENU PWR key one time to enter into channel selection sub-manual, and short press MENU PWR key three
times to enter into VOX(voice-operated transmission) sub-manual,
Use or to select OFF & the desired VOX level ( OFF –03). Without pressing the PTT button, the voice
signal can be transmitted through the microphone.
3. ADJUSTMENT DESCRIPTION
The transceiver can be adjusted manually , Manual adjustment procedure for R8 is summarized as follows.
A) Instrument Lists:
Radio Communication Test Set(HP8924C) „„„„„„„„„„„„„1 set
15V/2A DC Power Supply„„„„„„„„„„„„„„„„1 set
multimeter „„„„„„„„„„„„„„„„„„„„„1 set
B) Preparation for tuning the transceiver
i. Before attempting to tune the transceiver, connect the device under test (DUT) to a 4.5V DC power supply.
ii. Whenever the transmitter is tuned, the antenna port of DUT must be connected to a 50Ωdummy load iii. The speaker
output must be terminated to an 16Ωdummy load and connected to a Radio Communication Test Set(HP8924C) at all
times during tuning.
C) Adjustment Procedures
i. Common Section
