351804-1 Rev. 100
COM5000-8 TECHNICAL MANUAL
46
Measure resistance between:
Verify values:
Adjust:
U29 pin 3 and GND
2.2
– 2.4 K ohm
VR6 for 2300 Ohm
U29 pin 5 and GND
2.2
– 2.4 K ohm
VR7 for 2300 Ohm
U30 pin 1 and 2
2.6
– 2.8 K ohm
VR8 for 2700 Ohm
U30 pin 6 and 7
1.7
– 1.9 K ohm
VR9 for 1800 Ohm
U41 pin 1 and 2
1.6
– 1.8 K ohm
VR4 for 1700 Ohm
U41 pin 6 and 7
1.6
– 1.8 K ohm
VR3 for 1700 Ohm
U41 pin 10 and GND
4.3 - 4.7 K ohm
VR5 for 4500 Ohm
U41 pin 12 and GND
1.5
– 1.7 K ohm
VR2 for 1600 Ohm
To perform operational adjustment of the System Controller Module it is necessary to operate the
Transmitter as follows:
The System Controller Module is pulled out of the Transmitter rack cabinet to gain access to
subassemblies.
All Control connections and the RF drive signal connection from the T-4180 are in place to permit
normal operation of the Transmitter.
The Transmitter is terminated in a 50 Ohm Load/Attenuator with a wattmeter inserted between the
RF output connector and the load.
A variable attenuator (0.1 dB resolution) is inserted in the RF drive input connection between the
T-4180 and the System Controller.
Содержание COM5000-8
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Страница 24: ...351804 1 Rev 100 COM5000 8 TECHNICAL MANUAL 14 Figure 3 2 2 PA Module Front Panel ...
Страница 25: ...351804 1 Rev 100 COM5000 8 TECHNICAL MANUAL 15 Figure 3 2 3 System Controller Module Front Panel ...
Страница 43: ...351804 1 Rev 100 COM5000 8 TECHNICAL MANUAL 33 Figure 5 4 1A 1 25kW PA Module Subassembly Location ...
Страница 63: ...351804 1 Rev 100 COM5000 8 TECHNICAL MANUAL 53 Figure 5 1 Transmitter Interconnect Wiring Diagram ...
Страница 64: ...351804 1 Rev 100 COM5000 8 TECHNICAL MANUAL 54 Figure 5 4 1 PA Module Interconnect Wiring Diagram ...
Страница 65: ...351804 1 Rev 100 COM5000 8 TECHNICAL MANUAL 55 Figure 5 4 3 System Controller Interconnect Wiring Diagram ...
Страница 66: ...351804 1 Rev 100 COM5000 8 TECHNICAL MANUAL 56 Figure 5 4 4 Power Supply Interconnect Wiring Diagram ...