Amplifier Research 75A250A Specifikace

TABLE OF CONTENTS SECTION I: GENERAL INFORMATION 1.1 General Description ...1-

Model 75A250A Manual Text 2-7 REV A 2.2.2 Remote Operation (continued) 2.2.2.7 RS-232 Communications (continued) Table 2-3 RS-232 Connector Pin-

Model 75A250A Manual Text 2-8 REV A 2.2.2 Remote Operation (continued) 2.2.2.8 Remote Commands (continued) 2.2.2.8.1 Power On/Off Controls the

Model 75A250A Manual Text 3-1 REV A 3.1 INTRODUCTION The Model 75A250A amplifier consists of two (2) modules. The first module (A1) consists o

Model 75A250A Manual Text 3-2 REV A 3.4 A4 OPERATE/CONTROL BOARD (SCHEMATIC DIAGRAM No. 1008597) The A4 Operate/Control Board is a microcontro

Model 75A250A Manual Text 4-1 REV A SECTION IV MAINTENANCE 4.1 GENERAL MAINTENANCE INFORMATION The Model 75A250A should require very little m

Model 75A250A Manual Text 4-2 REV A 4.3 TROUBLESHOOTING The techniques used in troubleshooting solid state instruments are similar to those u

Model 75A250A Manual Text 4-3 REV A 4.3.1.2 Check the FUNCTION switch on the unit’s front panel; it must be set to the LOCAL position in order t

Model 75A250A Manual Text 4-3 REV A 4.3.3 Thermal Fault (Schematic Diagram No 1011806) During a Thermal Fault, the front panel VFD should read “T

Model 75A250A Manual Text 4-4 REV A 4.3.3 Thermal Fault (Schematic Diagram No 1011806) (continued 4.3.3.1 Try to reset the unit; if the unit re

Model 75A250A Manual Text 4-5 REV A 4.3.5 Voltage/Amplifier Faults (Schematic Diagram Nos. 1011806) The model 75A250A fault circuits sense volta

SECTION V: REPLACEABLE PARTS (CONTINUED) 5.4 Circuit Designators ...

Model 75A250A Manual Text 4-1 REV -

Model 75A250A Manual Text 1-1 REV A SECTION I GENERAL INFORMATION 1.1 GENERAL DESCRIPTION The Amplifier Research (AR) Model 75A250A is a self-co

Model 75A250A Manual Text 2-1 REV A SECTION II OPERATING INSTRUCTIONS 2.1 GENERAL Operation of the Model 75A250A broadband RF amplifier is simp

Model 75A250A Manual Text 2-2 REV A 2.2 AMPLIFIER OPERATION Figure 2-1 shows the front panel of the Model 75A250A broadband RF amplifier. Figu

Model 75A250A Manual Text 2-3 REV A 2.2 AMPLIFIER OPERATION (CONTINUED) 2.2.1 Local Operation Power-up Sequence: 1. Connect the input signal to

Model 75A250A Manual Text 2-4 REV A 2.2.2.2 Selecting Remote Operation The Model 75A250A can be placed in the remote operation mode at any time

Model 75A250A Manual Text 2-5 REV A 2.2.2 Remote Operation (continued) 2.2.2.4.2 IEEE-488 device address selection (continued) Table 2-1 IEEE-48

Model 75A250A Manual Text 2-6 REV A 2.2.2 Remote Operation (continued) 2.2.2.6 IEEE-488 Communications (continued) Table 2-2 Remote Error Codes/