Sailor RE2100, Technical Manual

Page: 51 / 186

3 SERVICE RE2100
3.5.3.4 PERFORMANCE CHECK OF EXCITER STEP ATTENUATOR
1. If only this chapter is performed, please start by carrying out the section 3.5.3.1. point 1 and 2.
2. Select test programme SP-05-2.
3. Check that the stairs and staircase waveform seen on the oscilloscope screen has a continuous
decreasing amplitude as shown below
4-0-26207
3.6 MODULE PERFORMANCE CHECK
GENERAL
A module performance check is intended to be used as an integral part of the trouble-shooting, because
it gives the technician a chance to control the individual modules and parts of the circuit on each module.
The module performance check is divided into subsections, which correspond to the individual modules,
and each of these subsections contains a number of check procedures.
The module performance check is carried out with all modules mounted in the HF SSB RE2100, and if
a testbox is available, it should be used. The RE2100, the power supply, and the handset are all connected
to the testbox as described in chapter 3.3. PROPOSAL FOR NECESSARY TEST EQUIPMENT.
If no testbox is available, it is possible to operate the RE2100 by connecting the power supply directly to
the 25 pin connector, which is located at the back of the RE2100. The pin configuration for this connector
is listed in chapter 2.3. ELECTRICAL CONNECTION AND ASSEMBLING. But it is only necessary to
establish the following connections:
pin No. 10 -18V/0.2A
pin No. 11 + 9V/0.5A
pin No. 12 +18V/0.8A
pin No. 5 GND
The handset is connected directly to the 9 pin connector at the back of the RE2100.
This chapter includes a number of measurements where a signal generator is needed. The output level
of the generator is, in this manual, expressed in terms of the Electromotive Force (EMF), and it is
measured in terms of the unit: dB/uV = 20 log(EMF/1uV), (dB above one microvolt).
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