Amplifier Research 75A250A Manual - Page 6

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Model 75A250A
2.2 A
O
MPLIFIER
PERATION

2.2.1 Local Operation

Power-up Sequence:
1.
Connect the input signal to the unit's RF INPUT connector. The input signal level should be
0dBm maximum.
2.
Connect the load to the unit's RF OUTPUT connector.
3.
Check to see that the MAIN POWER switch (circuit breaker) on the unit's rear panel is set to
the 1 ("on") position.
4.
Press the POWER switch: the front panel vacuum fluorescent display (VFD) should read
POWER ON, STATUS OK when power is applied.
(NOTE: The amplifier changes state each time the POWER switch is depressed—if the
unit is on when the POWER switch is depressed, it will turn off; if the unit is off when the
POWER switch is depressed, it will turn on.)
5.
In the event of a fault, press the FAULT/RESET switch; if the fault does not clear, refer to
subsection 4.3 ("Troubleshooting") of this manual.

2.2.2 Remote Operation

2.2.2.1
Introduction
This subsection describes remote operation of the Model 75A250A amplifier by utilizing either the
IEEE-488 parallel interface or the RS-232 serial interface and a controlling devic e, such as a bus
controller or a personal computer (PC).
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CONTINUED
Manual Text
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