Technical Characteristics; Trouble Shooting; How To Transmit Or Receive A Message - PRESIDENT JOHNSON II ASC Manuel D'utilisation

C) TECHNICAL CHARACTERISTICS:
1) GENERAL:
- Channels
- Modulation modes
- Frequency ranges
- Antenna impedance
- Power supply
- Dimensions (in mm)
- Weight
- Accessories supplied
2) TRANSMISSION:
- Frequency allowance
- Carrier power
- Transmission interference
- Audio response
- Emitted power in the adj. channel
- Microphone sensitivity
- Drain
- Modulated signal distortion
3) RECEPTION:
- Maxi. sensitivity at 20 dB sinad
- Frequency response
- Adjacent channel selectivity
- Maximum audio power
- Squelch sensitivity
- Frequency image rejection rate
- Intermediate frequency rej. rate
- Drain
: 40
: AM/FM
: from 26.965 MHz to 27.405 MHz
: 50 ohms
: 13.2 V
: 170 (W) x 150 (D) x 52 (H)
: 1 kg
: microphone UP/DOWN with support,
mounting cradle, screws and
fused power cord.
: +/- 300 Hz
: 1 W AM / 4 W FM
: inferior to 4 nW (- 54 dBm)
: 300 Hz to 3 KHz in AM/FM
: inferior to 20 µW
: 3.0 mV
: 2 A (with modulation)
: 1.8 %
: 0.5 µV - 113 dBm (AM/FM)
: 300 Hz to 3 kHz in AM/FM
: 60 dB
: 3 W
: minimum 0.2 µV - 120 dBm
maximum 1 mV - 47 dBm
: 60 dB
: 70 dB
: 400 mA nominal / 1000 mA maximum
D) TROUBLE SHOOTING:
1) YOUR CB RADIO WILL NOT TRANSMIT OR YOUR
TRANSMISSION IS OF POOR QUALITY:
- Check that the antenna is correctly connected and that the SWR is properly
adjusted.
- Check that the microphone is properly plugged in.
- Check that the programmed configuration is the correct one (see p. 50).
2) YOUR CB RADIO WILL NOT RECEIVE OR RECEPTION IS
POOR:
- Check that the Local function is not activated
- Check that the squelch level is properly adjusted.
- Check that the programmed configuration is the correct one (see p. 50).
- Check that the volume is set to a comfortable listening level.
- Check that the microphone is properly plugged in.
- Check that the antenna is correctly connected and that the SWR is properly
adjusted.
- Check that you are using the same modulation mode as your correspondent.
3) YOUR CB WILL NOT LIGHT UP:
- Check the power supply.
- Check the connection wiring.
- Check the fuse.
E) HOW TO TRANSMIT OR RECEIVE A MESSAGE:
Now that you have read the manual, make sure that your CB Radio is ready
for use (i.e. check that your antenna is connected).
Choose your channel (19, 27).
Choose your mode (AM/FM) which must be the same as that of your corre-
spondent.
Press the «push-to-talk» switch and announce your message «Attention sta-
tions, transmission testing» which will allow you to check the clearness and the
power of your signal. Release the switch and wait for a reply. You should
receive a reply like, «Strong and clear».
If you use a calling channel (19, 27) and you have established communication
with someone, it is common practice to choose another available channel so
as not to block the calling channel.
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