Sailor RE2100, Technical Manual

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3 SERVICE RE2100
22. Press the keyboard FREQ error buttons to toggle the 10 Hz decimal up and down.
23. Press the keyboard TUNE/CLARIF button.
24. Press the keyboard FREQ error buttons to toggle the 100 Hz decimal up and down.
25. Press the keyboard 2182 button.
26. Control that the display shows ‘2182.0 kHz’
‘2182.0 kHz’
27. Press the keyboard TEST ALARM button.
28. Control that the alarm tones can be heard in the handset earpiece.
29. Press the keyboard button ENT.
30. Press the keyboard buttons SEND ALARM and TEST ALARM.
31. Control that the display shows ‘Error 20’
‘2182.0 kHz’
when these two buttons are pressed simultaneously.
3.5.2 PERFORMANCE CHECK OF RECEIVER
Connect the RE2100 with the testbox for RE2100 and connect the power supply and a loudspeaker to
the proper inputs on the testbox.
The necessary test equipment to carry out a performance check is described in this manual, chapter 3.3
PROPOSAL FOR NECESSARY TEST EQUIPMENT.
This chapter contains the following sections:
3.5.2.1. PERFORMANCE CHECK OF RECEIVER SENSITIVITY
3.5.2.2. PERFORMANCE CHECK OF RECEIVER DISTORTION
3.5.2.3. PERFORMANCE CHECK OF RECEIVER AUDIO PASSBAND
3.5.2.4. PERFORMANCE CHECK OF RECEIVER CLARIFIER AND FREQUENCY
3.5.2.5. PERFORMANCE CHECK OF RECEIVER AGC
3.5.2.6. PERFORMANCE CHECK OF RECEIVER SQUELCH
3.5.2.7. PERFORMANCE CHECK OF RECEIVER EXTERNAL CONNECTIONS
3.5.2.1 PERFORMANCE CHECK OF RECEIVER SENSITIVITY
1. Connect the signal generator to the aerial socket through the 50 ohm dummy load described in this
manual, chapter 3.3.
2. Connect a voltmeter or a distortion meter to the 0 dBm output on the testbox.
3. Choose receiver frequency f
RX
, generator frequency f
G
, and generator output level V
G
according to
table in point 5.
4. Measure the signal to noise ratio SND/N with the distortion meter or the voltmeter as described in
point 6. The measured signal to noise ratio shall be better than 20 dB.
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