HP 11793A manual Pin

Page 34

Microwave Converter

Model 1 1793A

Service Sheets 1 and 2 (Input Signal Down-Converter)

A single input on the rear panel: the FREQ OFFSET INPUT, has three logic states which control both the switching of the RF two paths, and the insertion of the optional LO Amplifier. The Level Comparator senses the three states and drives the appropriate switches.

Service Sheets 1 and 2 are the schematic diagrams of the RF circuitry of the Microwave Converter. Service Sheet 1 (SS1) documents the standard Microwave Converter (without the LO Amplifier option), and Service Sheet 2 (SS2) documents the Microwave Converter with the LO Amplifier.

The operation of the RF components is discussed in the principles of operation for the Simplified Block Diagram above. Note that the RF switches (SI and S2), shown in the schematic, automatically interrupt the current flowing into the energized solenoid once the plunger switches the RF contacts. The plungers latch via permanent magnets.

Service Sheet 3 (AI Switch Control Assembly)

The Level Comparator (UIA and U1B) and Decoder (U3A, U3B, and U3C) decode a three level input (through the rear-panel FREQ OFFSET INPUT connector) into binary levels that control the RF switches (see SS1 and SS2). The AND gates (U2) are simply open-collector inverters,'which drive the transistors (42, 43, 44, QS) to switch on and energize the solenoids of the RF switches. Table 9 summarizes the decoding.

RF

LO

Level at

U1A

U1B

U3A

U3B

 

 

 

 

 

FREQ

PinU3C8

Q2

Q3

Q4

Q5

Path

Amp

OFFSET

Pin

1

Pin

6

Pin 3

Pin

6

 

 

INPUT

 

 

 

 

 

 

 

 

 

 

 

 

Direct

out

<2.0v

H

 

L

 

H

H

 

L

Off

Off

On

On

Down-Convert

In

2.0 to 3 . w

H

 

H

 

L

L

 

H

On

On

Off

Off

Down-Convert

Out

>3.av

L

 

H

 

H

L

 

L

Off

On

Off

On

The power supplies used are:

mThe unregulated +26V supplies drive current to the RF switch solenoids, and is the input to the +12V Regulator.

8The regulated +12V is the only adjustable supply. It is the current input to the +SV Regulator as well as the reference from which both the Level comparator references are derived, and the RF Amplifiers are powered.

eThe regulated +SV supplies current to most logic devices.

Either the +26 or +12V supply can trigger the Over-Voltage Protection should the respective voltage exceed +42 or + 12V. LED DS 1 gives an indication that the supply is nominally operational.

24

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Contents HP 11793A Warranty AgiIent TechnoIogies Microwave Converter Regulatory Information Safety Considerations Safety Considerationsfor this Instrument Product Markings Safety Considerations Microwave Converter Specifications General InformationPage HP 11 793A Option Guide Microwave Converter Model 11793A Model 11793A Microwave Converter Mating Connectors Power RequirementsPower Cables Line Voltage SelectionI0 0.J Rack Mounting Operating EnvironmentBench Operation Storage and ShipmentOperation Operating InstructionsOperator Maintenance Panel FeaturesOperator Checks Front-Panel Features Performance Tests Description EquipmentReplaceable Parts List AdjustmentsReplaceable Parts Page Model 11793A Replaceable Parts Model 11793A Replaceable PartsReplaceable Parts Model 1 1793A Code List of Manufacturers Cabinet Parts Illustrated Parts Breakdown for Standard and Option Microwave Converter Model Service Pin Troubleshooting GeneralDevice Repair Cleanliness Cleaning the Control-Line Switch ContactsInstrument Disassembly Procedure Instrument Assembly Procedure Page Page Page Page Page Model 11793A Microwave Converter Microwave Signal DOWN-CONVERSION L Ill Ss2 Ss3 Regional Sales and Service Offices

11793A specifications

The HP 11793A is a precision electronic component designed for high-frequency signal processing and transmission, primarily used in laboratory and industrial applications. This device exemplifies HP's longstanding commitment to quality and innovation in the world of electronic instrumentation.

One of the notable features of the HP 11793A is its ability to handle a wide frequency range, making it suitable for a variety of tasks, including signal analysis, modulation, and demodulation. This versatility is complemented by its excellent linearity and low distortion, which are critical factors for applications that require high accuracy and reliability in signal representation.

The HP 11793A employs advanced technologies that enhance its performance and usability. One of the key technologies is its robust signal conditioning capabilities, which allow it to filter and amplify signals effectively. This ensures that even weak signals can be accurately processed, significantly improving measurement reliability. Furthermore, the device uses cutting-edge materials and manufacturing processes to minimize noise and interference, paving the way for clearer and more precise signal outputs.

Another significant aspect of the HP 11793A is its user-friendly interface. Designed with the operator in mind, the device features intuitive controls and a well-organized display, enabling quick adjustments and easy monitoring of parameters. This ergonomic design is particularly beneficial in high-pressure environments where time is crucial, allowing technicians and engineers to focus on their tasks without being bogged down by complicated procedures.

Reliability is paramount in any electronic component, and the HP 11793A does not disappoint. Built to withstand rigorous testing and prolonged usage, it boasts a durable construction that ensures longevity. The device also adheres to strict safety and performance standards, providing users with peace of mind.

In conclusion, the HP 11793A combines high-frequency signal processing capabilities, advanced signal conditioning technologies, user-friendly design, and robust reliability. These features make it an essential tool for professionals in the fields of electronics, telecommunications, and research laboratories, contributing to a more efficient and effective workflow in high-precision tasks. Whether for development, testing, or analysis, the HP 11793A stands out as a notable choice in the realm of electronic instrumentation.
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