Skanti TRP 5000, Инструкция по эксплуатации

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7.11.6 Realignment of 1.6-4 MHz filter:
Control settings: SUPPLY switch: STAND BY
MODE switch: A3J
POWER switch: DUPLEX
BAND switch: Not 2182 kHz
FREQUENCY NO: A radiotelephone frequency between
1.6 and 4 MHz
1. Conneet signal generator to test point 233TP3 through a 10 nF
capacitor and to ground at 233R16.
2. Connect receiver input to BNC socket 231SK7.
3. Set signal generator to 4.43 MHz, 100 mV.
4. Set receiver to same frequency and adjust for a beat note.
5. Adjust 233L22 for minimum signal (adjust receiver sensitivity to
obtain a clear minimum).
6. Set signal generator and receiver to 4.83 MHz.
7. Adjust 233L24 for minimum signal.
8. Set signal generator and receiver to 7.13 MHz.
9. Adjust 233L20 for minimum signal.
7.11.7 Realignment of Band Pass Filters 4-25 MHz:
Control Settings: SUPPLY switch: STAND BY
MODE switch: A3J
POWER switch: DUPLEX
BAND switch: Not 2182 kHz
1. Connect signal generator to test point 233TP3 through a 10nF
capacitor and to ground at 233R16.
2. Connect oscilloscope to BNC socket 231SK7 through a coaxial cable
terminated into 50 ohms at the oscilloscope.
3. Select by means of the keyboard a radiotelephone frequency in the
band to be realigned.
4. Set signal generator to alignment frequency given in table below.
5. Connect a 1 kohm resistor between the alignment terminals across
233L32.
6. Adjust the input coil of the filter in question for maximum
deflection on oscilloscope.
7. Move the 1 kohm resistor to the alignment terminals across
233R56.
8. Adjust the output coil of the filter for maximum deflection on
the oscilloscope.
9. Remove 1 kohm resistor.
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