Sailor RE2100, Technical Manual

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3 SERVICE RE2100
3.7.2.3 ADJUSTMENT OF THE VCO CIRCUITS IN PLL1
The PLL1 consists of four independent Voltage Controlled Oscillators, which each covers about a quarter
of the whole frequency band of 30 MHz.
The VCO circuits are adjusted by four individual coils. The adjustment is performed at the upper frequency
in each of the four VCO bands and the coils are adjusted until the output voltage from the active loop filter
is -11.0 Volt.
1. Turn the RE2100 on.
2. Connect the voltmeter to TP1-3.
3. Key-in the RX-frequencies and adjust VCO coils according to table 4 until voltage on TP1-3 is -11.0
Volt.
4
5. Key-in the RX-frequencies according to table 6 and check the voltage on TP1-3 to be -3 Volt +/-
1.0 Volt.
NOTE! No adjustments of VCO coils shall be made.
6.
RX-frequency
100.0
7500.0
15000.0
22500.0
3.7.2.4 ADJUSTMENT OF THE VCO CIRCUITS IN PLL2
The PLL2 consists of two independent Voltage Controlled Oscillators, which are used in USB and LSB
mode respectively.
The VCO circuits are adjusted by two individual coils, which are adjusted until the output voltage from the
active loop filter is -6.5 Volt.
1. Turn the RE2100 on.
2. Connect the voltmeter to TP5-3.
3. Select J3E mode and adjust TR08 until the voltage on TP5-3 is -6.5 Volt.
4. Select LSB mode and adjust TR07 until the voltage on TP5-3 is -6.5 Volt.
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