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PRESIDENT JOHNSON III Manuel D'utilisation page 36

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D) TECHNICAL CHARACTERISTICS
1) GENERAL
-
Channels
:
-
Modulation modes
:
-
Frequency ranges
:
-
Antenna impedance
:
-
Power supply
:
-
Dimensions (in mm)
:
-
Weight
:
-
Supplied accessories
:
2) TRANSMISSION
-
Frequency allowance
:
-
Carrier power
:
-
Transmission interference
:
-
Audio response
:
-
Emitted power in the
adjacent channel
:
-
Microphone sensitivity
:
-
Drain
:
-
Modulated signal distortion :
3) RECEPTION
-
Max. sensitivity at 20 dB sinad
-
Frequency response
-
Adjacent channel selectivity
-
Maximum audio power
-
Squelch sensitivity
-
Frequency image rejection rate
-
Intermediate frequency rejection rate :
-
Drain
40
AM/FM
from 26.965 MHz to 27.405 MHz
50 ohms
13.2 V / 26,4 V
178 (W) x 120 (D) x 50 (H)
750 g
Microphone UP/DOWN with support,
1 mounting cradle, 1 DIN rack with
screws and fused power cord.
+/- 300 Hz
4 W (AM/FM)
< 4 nW (- 54 dBm)
300 Hz to 3 KHz (AM/FM)
< 20 µW
5.0 mV
≤ 1,5 A (13,2V) / ≤ 0,8 A (26,4V)
≤ 2 %
:
0,5 µV - 113 dBm (AM)
0,35 µV - 116 dBm (FM)
:
300 Hz to 3 kHz (AM/FM)
:
60 dB
:
2 W
:
min. 0.2 µV - 120 dBm
max. 1 mV - 47 dBm
:
60 dB
70 dB
~
:
0,25
0,45 A (13,2V)
~
0,1
0,25 A (26,4V)
E) 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.
54).
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.
54).
-
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 corre-
spondent.
3) YOUR CB WILL NOT LIGHT UP
-
Check the power supply.
-
Check the connection wiring.
-
Check the fuse.
F) 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 cor-
respondent.
Press the «push-to-talk» switch and announce your message «Attention
stations, 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 communi-
cation with someone, it is common practice to choose another available
channel so as not to block the calling channel.
36

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