Amplifier Research 5S1G4 Amplifier
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The Model 5S1G4
is a solid state, self-contained,
air-cooled, broadband Amplifier
designed for applications
where instantaneous bandwidth and high gain are required.
Housed in a stylish contemporary cabinet, the
unit is designed for benchtop use, but can be removed from
the cabinet for immediate equipment rack
mounting. The 5S1G4
when used with a sweep Generator
provide a minimum of 5 watts of RF power.
Included is a front panel gain control which permits the
operator to conveniently set the desired output level.
is protected from RF input overdrive by an RF
input leveling circuit which controls the RF input level
to the RF Amplifier
first stage when the RF input level is
increased above 0 dBm. The RF Amplifier
protected from over temperature by removing the DC voltage
to them if an over temperature condition occurs
due to cooling blockage or fan failure. There is a fault
lamp on the rear panel to indicate an over temperature
or Power supply
fault condition. The unit can be returned to
operate when the condition has been cleared.
Service and User Manual
2.46 Mbytes (2576829 Bytes)
Scanned document, reading partly badly, partly not readable.
10 September 2016
TABLE O F C O N T E N T S
G E N E R A L IN F O R M A T IO N
O P E R A T IN G IN S T R U C T IO N S
T H E O R Y O F O P E R A T IO N
RF Am plifier
Operation ... 7
A l Variable Gain Amp (Schematic No. 1012338 Part o f
Schematic 1012408) ... 7
A3 Linearizer Control Circuit (Schematic 1012335 Part o f
Schematic 1012408) 7
A4 One (1) Watt Amplifier
(Schematic 1010591 Part o f
Schematic 1012011) ... 8
A5 Bias Control (Schematic 1011214 Part o f Schematic
1012011) ... 8
Quadrature-Coupled Amplifiers (“Quad Am ps”) (Schematic No.
1011064) ... 8
A7 Regulator/Fault Board (Schematic
1007397) ... 9
M A IN T E N A N C E
General Maintenance Inform
Procedure ... 11
Troubleshooting ... 12
Green Power Indicator LED Doesn't
Thermal Fault ...
Voltage F a u
Low or No RF power