Equipment information

Racal 2051 Counter
Manufacturer
Racal
Model 2051
Date 1991
Category Measurement instruments
Group Counter
Description VXI Counter
Information
                                    1 The Racal Instruments VXlbus microwave Counter, Model
2151, is a microprocessor- controlled instrument offering
high-accuracy measurements with a comprehensive range of
facilities. These facilities include Automatic/Manual
Operation, Tracking, Offset, Multiply, and Store and Recall.
All the instrument’s functions are controlled remotely via
the VXI Interface.
2 The Racal Instruments VXlbus UHF Counter, Model 2051,
offers high accuracy measurement over a reduced frequency
range, with a similar range of facilities to those provided
on the Model 2151.
MEASUREMENT FUNCTIONS
Frequency A Function
3 The Frequency A Function is used to measure the frequency
of the signal applied to INPUT A. A resolution of up to ten
digits can be selected with a gate time of 1 millisecond to
20 seconds depending on the resolution selected.
Frequency B Function
4 The Frequency B Function is used to measure the frequency
of the signal applied to INPUT B. A resolution of up to ten
digits can be selected with a gate time of 1 millisecond to
20 seconds depending on the resolution selected.
Frequency C Function (2151 only)
5 The Frequency C Function is used to measure the frequency
of the signal applied to INPUT C. A resolution of 0.1 Hz to
1 MHz can be selected with a gate time of 1 millisecond to
10 seconds depending on the resolution selected and
frequency being sampled.
Ratio C/B Function (2151 only)
6 The Ratio C/B Function is used to measure the ratio of the
frequency applied to INPUT C to that applied to INPUT B.
Ratio C/A Function (2151 only)
7 The Ratio C/A Function is used to measure the ratio of the
frequency applied to INPUT C to that applied to INPUT A.
Ratio B/A Function
8 The Ratio B/A Function is used to measure the ratio of the
frequency applied to INPUT B to that applied to INPUT A.

These manuals are available for the above equipment:

Manual Type Service Manual Racal-7287-Manual-Page-1-Picture
Pages 66
Size 578.33 Kbytes (592210 Bytes)
Language english
Revision
Manual-ID/Number
Date March 1991
Quality Scanned document, all readable.
Upload date
MD5 be2c3aa1dad39bae6c7982e79f615f42
Downloads 163 since 10 October 2015
Information
TECHNICAL
SPECIFICATION ... 1-1
GENERAL DESCRIPTION
 ... 2-1
INTRODUCTION ... 2-1
MEASUREMENT FUNCTIONS
 ... 2-1
Frequency A Function
 ... 2-1
Frequency B Function
 ... 2-1
Frequency C Function (2151
only) ... 2-1
Ratio C/B Function (2151 only)
 ... 2-1
Ratio C/A Function (2151 only)
 ... 2-1
Ratio B/A
Function ... 2-1
CHECK FUNCTION
 ... 2-2
SIGNAL INPUT CHANNELS
 ... 2-2
ADDITIONAL FREQ C ACQUISITION MODES (2151 ONLY)
 ... 2-3
MATHS FUNCTIONS
 ... 2-3
SPECIAL
FUNCTIONS ... 2-3
STORE/RECALL FUNCTIONS
 ... 2-3
SAMPLE RATE
 ... 2-3
ERROR INDICATION
 ... 2-4
HOLD FEATURE ... 
 ... 2-4
RESOLUTION AND GATE
TIME ... 2-4
EXTERNAL Frequency Standard
INPUT ... 2-4
INITIALIZATION ... 2-4
VXI
INTERFACE ... 2-5
PREPARATION FOR
USE ... 3-1
UNPACKING
 ... 3-1
SETTING THE LOGICAL ADDRESS AND INTERRUPT
PRIORITY
SWITCHES ... 3-1
INSTALLATION
 ... 3-1
Connection to the VXI
 ... 3-1
FREQUENCY
STANDARD ... 3-1
FUNCTIONAL
CHECK ... 3-5
VXI Check
 ... 3-5
CHE CK Message
Check ... 3-5
Data Output Check
* ... 3-6
SRQ and Status Byte Check
 ... 3-6
Input Channel Function Checks
 ... 3-7
OPERATION VIA THE VXI
 ... 4*1
INTRODUCTION
 ... 4-1
DESCRIPTION OF FRONT PANEL CONNECTORS
AND INDICATORS  ... 4-1
DESCRIPTION OF SIDE PANEL SETTING CONTROLS
 ... 4-2
INITIAL SWITCH-ON
 ... 4-3
FREQUENCY MEASUREMENT- INPUT
A ... 4-3
FREQUENCY MEASUREMENT - INPUT
B ... 4-4
FREQUENCY MEASUREMENT - INPUT C (2151 ONLY)
 ... 4-4
Normal Automatic Mode
 ... 4-4
Manual
Mode ... 4-5
Further Functions in FREQ C
(Automatic Mode
Only) ... 4-5
Set LOW FM (FREQ
C) ... 4-5
Set TRACK (FREQ C)
 ... 4-6
RATIO MEASUREMENTS C/B (2151 ONLY),
C/A (2151 ONLY) AND B/A
 ... 4-6
MEASUREMENT SAMPLE RATE
 ... 4-7
Setting and U sing the Sample
Rate ... 4-7
Interrogating the Sample Rate
 ... 4-7
MULT
FUNCTION ... 4-7
Setting the Multiplier
 ... 4-7
Enabling the
Multiplier ... 4-7
Interrogating the
Multiplier ... 4-7
OFFSET FUNCTION
 ... 4-8
Setting the
Offset ... 4-8
Enabling the Offset
 ... 4-8
Interrogating the
Offset ... 4-8
SMOOTH FUNCTION ... 
 ... 4-8
CLK10 Frequency Standard
 ... 4-8
GATE
TIME ... 4-9
SPECIAL FUNCTIONS
 ... 4-10
Setting the Special Function Register
 ... 4-11
Enabling and Disabling the Special Functions
 ... 4-11
ERROR CODES  ... 
 ... 4-12
Clearing the Error Codes
 ... 4-12
VXI OPERATING MODES
 ... 4-13
READING OUT
DATA ... 4-13
CONTROLLING THE
INSTRUMENT ... 4-13
DATA OUTPUT
FORMAT-NORMAL ... 
 ... 4-14
DATA OUTPUT FORMAT -.DUMP
MODES ... 4-14
REQUESTING SERVICE
 ... 4-18
STATUS BYTE
 ... 4-18
SETTING THE ENABLE
REGISTERS, ... 4-22
MESSAGE PROTOCOLAND SYNTAX
 ... 4-22
System Message
Traffic ... 4-22
Program
Messages ... 4-22
Response
Messages ... 4-23
White Space
Character ... 4-23
OVERLAPPED/SEQUENTIAL COMMANDS
 ... 4-23
COMMANDS
 ... 4-24
Racal-7287-Manual-Page-1-Picture


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