Sailor RE2100, Technical Manual

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3 SERVICE RE2100
4. Measure the signal distortion SND/ND with the distortion meter. The measured distortion SND/ND
shall be better than the figures given in the table in point 5.
5.
3.5.2.3 PERFORMANCE CHECK OF RECEIVER AUDIO PASSBAND
1. Connect the signal generator to the aerial socket through a 50 ohm dummy load.
2. Connect a voltmeter to the 0 dBm output on the testbox.
3. Choose receiver frequency f
RX
, generator frequency f
G
, generator output level V
G
according to point
7.
4. USB-SSB MODE
a.
Set the f
RX
, f
G
and V
G
according to point 1 in the table in point 7.
b. Turn the RF-GAIN control fully clockwise and make sure that the AGC is operative.
c. Notice the AF output level by means of the voltmeter.
d. Turn the AGC off and adjust the RF-GAIN control to achieve the output level found in
point 4.c.
e. Change the signal generator frequency f
G
, and the generator output level V
G
according to
point 2 in table 7, and control the voltage on 0 dBm output to be above the value found in
point 4.c.
f. Change f
G
according to point 3 in table 7 and control the voltage on 0 dBm output to be below
the value found in point 4.c.
5. LSB-SSB MODE
Carry out point 4. USB-SSB MODE, but use the figures mentioned in point 7, under “lower sideband
audio passband”.
6. AM MODE
a.
Set f
RX
, f
G
and V
G
according to point 4 in table 7.
b. Notice the AF output level by means of the voltmeter.
c. Change the modulation frequency according to the figures in point 5 in table 7, and control
that the voltage on 0 dBm output has not dropped 6 dB below the value found in point 6.b.
d. Change the modulation frequency according to the figures in point 6 in table 7, and control
that the voltage on 0 dBm output has dropped more than 20 dB below the value found in
point 6.b.
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