Tyco Electronics M/A-Com 19D902797G10, Maintenance Manual

Page: 11 / 36

TROUBLESHOOTING
Table 1 - UHF Power Amplifier Voltage Chart
PARAMETER
(50 ohm, -30
°
C to +60
°
C)
REFERENCE
SYMBOL
READINGS
(Volts DC)
SUPPLY VOLTAGE A+ 13.4 V
±
20%
CONTROL VOLTAGE Vct1 0 - 12 V
FORWARD VOLTAGE Vf 3 - 7 V
REVERSE VOLTAGE Vr 2 - 6 V
POWER SENSE J201-1 2.5 - 4 V
PA KEY J201-2 5 V
POWER SET J201-3 4 - 8 V
13.8 VF J201-6 13.8 V ± 20%
Table 2 - UHF Power Amplifier Typical Voltage Readings
(50 Ohm, Room Temperature, 13.4 Vdc Supply Voltage, and Rated Output)
Group Low Mid High
G3 450 MHz 460 MHz 470 MHz
G6 403 MHz 414 MHz 425 MHz
G7 425 MHz 437 MHz 450 MHz
G8 380 MHz 390 MHz 400 MHz
G9 470 MHz 482 MHz 494 MHz
G10 492 MHz 502 MHz 512 MHz
Frequency
G11 410 MHz 420 MHz 430 MHz
G3 7 - 10 Volts 6 - 8 Volts 4 - 6 Volts
G6 6 - 8 Volts 6 - 8 Volts 6 - 8 Volts
G7 6 - 8 Volts 6 - 8 Volts 6 - 8 Volts
G8 6 - 8 Volts 6 - 8 Volts 6 - 8 Volts
G9 & G10 6 - 8 Volts 6 - 8 Volts 6 - 8 Volts
Vct (Volts DC)
G11 6 - 8 Volts 6 - 8 Volts 6 - 8 Volts
G3 5 - 7 Volts 5 - 7 Volts 5 - 7 Volts
G6 6 - 8 Volts 6 - 8 Volts 6 - 8 Volts
G7 6 - 8 Volts 6 - 8 Volts 6 - 8 Volts
G8 6 - 8 Volts 6 - 8 Volts 6 - 8 Volts
G9 & G10 6 - 8 Volts 6 - 8 Volts 6 - 8 Volts
Vf (Volts DC)
G11 6 - 8 Volts 6 - 8 Volts 6 - 8 Volts
Continued
LBI-38674L 11
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