Performance Check Of Exciter - Sailor RE2100 Technical Manual

3 SERVICE
4. Connect a signal generator to the aerial socket through a 50 ohm dummy load.
5. Choose receiver frequency f
according to table in point 6.
6.
7. A 1 kHz tone shall be heard from the loudspeaker and approx. seven bars in the signal strength
meter are alight.
8. Activate the RX mute switch on the testbox.
9. No tone or noise shall now be heard from the loudspeaker and approx. 2 bars in the signal strength
meter are alight.
10. Release the RX mute switch.
11. Activate the TEST ALARM button on RE2100 and control that the alarm tones can be heard in the
handset earpiece
3.5.3

PERFORMANCE CHECK OF EXCITER

Connect the RE2100 with the testbox for RE2100.
Connect a +/-18V/2A power supply, an LF signal generator, and the handset to the proper inputs on the
testbox.
The necessary test equipment for executing the performance check is described in this manual, chapter
3.3. PROPOSAL FOR NECESSARY TEST EQUIPMENT.
This chapter consists of the following sections:
3.5.3.1. Performance Check of Exciter Output Signal
3.5.3.2. Performance Check of Exciter Frequencies and Classes of Emission
3.5.3.3. Performance Check of Exciter Microphone Amplifier and LF Response
3.5.3.4. Performance Check of Exciter Step Attenuator
3.5.3.1 PERFORMANCE CHECK OF EXCITER OUTPUT SIGNAL
1. Connect a 50 ohm resistor to the aerial socket. Two 100 ohm resistors in parallel soldered on a coax
cable connected to the aerial socket are sufficient.
2. Connect an oscilloscope through a 10:1 probe to the 50 ohm resistor.
3. Connect the LF signal generator to the AF TO TX input on the testbox.
4. Select test programme SP-05-1 (fTX = 22.000 kHz).
5. Set the testbox switch RF ON/OFF on.
6. Adjust the LF signal generator to an output of 1Vpp (0.350V
7. Control that the HF output shown on the oscilloscope is 3.50 +/-0.50Vpp.
8. Readjust the oscilloscope gain until full deflection (8 div.) is seen on the screen.
PAGE 3-18
, signal generator frequency f
RX
and the generator output V
G
) and a frequency of 1600 Hz.
RMS
RE2100
G