Equipment information

Racal 2151 Counter
Manufacturer
Racal
Model 2151
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:

Racal -- 2151 -- Service Manual
File name Racal-7287-Manual-Page-1-Picture
Manual Type Service Manual
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 58 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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