Racal Instruments 2151 Manuel utilisateur

PUBLICATION NUMBER A1571

ISSUE 2.5.95

AND

20 GHz AND 2.6 GHz

VXI COUNTERS

RACAL INSTRUMENTS LTD.

480 Bath Road, Slough, Berkshire SL1 6BE, England.

Telephone: (01628) 604455. Fax: (01628) 662017

RACAL INSTRUMENTS INC.

4Goodyear Street, P.0. Box C-19541, Irvine. CA 92713, USA.

Telephone: (714) 859-8999. Fax: (714) 859 2505

RACAL SYSTEMS ELECTRONIQUE S.A.

18 Avenue Dutarte, 78150 Le Chesnay, France.

Telephone: (1) 39 55 88 88. Fax: (1) 39 55 67 35

RACAL SYSTEMS ELETTRONICA srl

Strada 2, Palazzo C4

20090 Miianofiori Assago Milan, Italy.

Telephone: (02) 5750. 1796 (auLres.). Fax: (02) 5750.1828

RACAL ELECTRONIK SYSTEM GmbH

Frankenforster Slrasse 21, 51427 Bergisch Gladbach 1, Germany.

Telephone: 02204 9222-0. Fax: 02204 21491 EEX3EB

PUBLICATION DATE: MARCH 1991

This book or parts thereof may not be reproduced in any form without written permission of the publishers.

C€

CE CONFORMITY:

EC Directives 73/23/EEC, 89/336/EEC, 92/31/EEC and 93/68/EEC

Units that carry the CE mark are designed to conform to standards, EN 61010-1, EN

50081-1, EN 50082-1, when used in accordance with these instructions.

SAFETY

Always operate the product in accordance with the instructions in this manual.

EMC

To ensure that EMC integrity is retained always follow good EMC practice. In

particular:

(1) Use good quality coaxial connections for signal input and output leads

(2) Use good quality screened data or control cables and connectors.

(3) Ensure that cable screens are properly terminated within the connectors. Do

not use cables if the terminations are loose or frayed.

(4) Ensure that the screening is continuous through to the chassis of the

equipment.

(5) Ensure that filler panels are fitted to all unused slots in the VXI mainframe.

(6) Note it may be necessary to fit EMI suppression ferrites to one or more of the

connecting leads to ensure compliance of the complete system with EMC regulations.

(7) Ensure that any associated equipment is CE^marked or is of good EMC design

and performance.

(2151)

RACAL Instruments Ltd.

GGSCIB

[A1571 |Microwave Counter :2151

TABLE OF CONTENTS

Paragraph Title Page

SECTION 1TECHNICAL SPECIFICATION... 1-1

SECTION 2GENERAL DESCRIPTION 2-1

1INTRODUCTION 2-1

3MEASUREMENT FUNCTIONS 2-1

3Frequency AFunction 2-1

4Frequency BFunction 2-1

5Frequency CFunction (2151 only) 2-1

6Ratio C/B Function (2151 only) 2-1

7Ratio C/A Function (2151 only) 2-1

8Ratio B/A Function 2-1

9CHECK FUNCTION 2-2

10 SIGNAL INPUT CHANNELS 2-2

13 ADDITIONAL FREQ CACQUISITION MODES (2151 ONLY) .2-3

14 MATHS FUNCTIONS 2-3

15 SPECIAL FUNCTIONS 2-3

16 STORE/RECALL FUNCTIONS 2-3

17 SAMPLE RATE 2-3

18 ERROR INDICATION ’I2-4

19 HOLD FEATURE 2-4

20 RESOLUTION AND GATE TIME 2-4

21 EXTERNAL FREQUENCY STANDARD INPUT 2-4

22 INITIALIZATION 2-4

23 VXI INTERFACE 2-5

SECTION 3

PREPARATION FOR USE

UNPACKING

SETTING THE LOGICAL ADDRESS AND INTERRUPT

PRIORITY SWITCHES

INSTALLATION

Connection to the VXI

FREQUENCY STANDARD ...

FUNCTIONAL CHECK

VXI Check

13 CHECK Message Check

14 Data Output Check *

15 SRQ and Status Byte Check ...

16 Input Channel Function Checks

3-1

3-5

3-6

3-7

SECTION 4

OPERATION VIA THE VXI

INTRODUCTION

DESCRIPTION OF FRONTPANEL CONNECTORS

AND INDICATORS

DESCRIPTION OF SIDE PANEL SETTING CONTROLS

4-1

4-2

2151 OPS Contents 1

A1571/DA

TABLE OF CONTENTS (Contd)

Paragraph

Contents 2

Title Page

INITIAL SWITCH-ON 4.3

FREQUENCY MEASUREMENT -INPUTA4-3

FREQUENCY MEASUREMENT -INPUT B4-4

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) 14.5

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 Using the Sample Rate 4-7

Interrogating the Sample Rate 4-7

MULTFUNCTION 4.7

Setting the Multiplier 4.7

Enabling the Multiplier 4-7

Interrogating the Multiplier 4-7

OFFSET FUNCTION 4.3

Setting the Offset 4-8

Enabling the Offset 4-8

Interrogating the Offset 4-8

SMOOTH FUNCTION "* 4.3

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 .4-1

ERROR CODES ~4_ 12

Clearing the Error Codes 4-12

VXI OPERATING MODES I4-13

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.I 8

SETTING THE ENABLE REGISTERS ,4-22

MESSAGE PROTOCOL AND 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

2151 OPS

A1571/DA

TABLE OF CONTENTS (Contd)

LIST OFTABLES

Table Title Page

3.1

3.2

3.3

4.1a

4.1b

4.2

4.3

4.4

4.5

4.6

4.7

4.8

4.9

4.10

4.11

4.12

4.13a

4.13b

4.13c

4.13d

4.14a

4.14b

4.14c

4.14d

4.14e

4.14F

4.14g

4.14b

4.141

4.14j

4.14k

4.141

4.15

4.16

4.17

4.18

4.19

Decimal to Hexadecimal Conversion

Pi VXI Connector Pin Assignment

P2 VXI Connector Pin Assignment

Gate Times for FREQUENCIES Aand B

Gate Times for FREQUENCY C

Major Special Functions

Minor Special Functions

Error Messages

Output Message Format

Function Letters ...

Frequency CDump

Frequency Aand BDump

Associated Registers

Status Byte and Service Request Enable Registers ...

Standard Event Status and Enable Registers

Device Defined Event Status and Enable Registers ...

Common Commands

Common Commands (Continued)

Device Dependent Commands

Device Dependent Commands (Continued)

Permitted Terminators

Numerical Input Format

Special Function Request (SF?) Response Format ...

Alphabetic List of Required Command Codes

Alphabetic List of Optional Command Codes

3-2

3-3

4-9

4-10

4-12

4-15

4-16

4-17

4-18

4-19

4-20

4-21

4-24

4-25

4-26

4-27

4-28

4-29

4-30

4-31

4-32

4-33

4-34

4-35

4-36

4-37

4-38

4-39

4-40

4-41

4-42

2151 OPS Contents 3

A1571/DA

ALOl/Iss.0 1/03.94

SECTION 1TECHNICAL SPECIFICATION

Model 2151

Technical Specifications

INPUTS

Input A:

Range 10Hz to 100MHz

Sensitivity 20mV rms 10Hz to 80MHz

30mV 80MHz to 100MHz

Input Impedance 1M ohm/35p F

Maximum Input 260V (DC +AC rms) to 2ltHzp

decreasing to 10V rms at 50kHz

and above

Input Attenuation xl and x20, selectable

Filter 50kHz low pass filter selectable

Input B:

Range 40MHz to 1.3 GHz

Sensitivity lOmV (to 1GHz)

75mV (at 1.3GHz)

Input Impedance 50 ohm nominal

Operating Range lOmV to 5V rms

Damage Overload 7V rms (protected by fuse)

VSWR 2.0 :1typical (to 1GHz)

AM Tolerance ^90% (for trough > minimum

pk-pk sensitivity)

Input C:

Range 500MHz to 20GHz

Sensitivity -32dBm (to 12.4GHz)

-27dBm (to 20GHz)

Maximum

Operating Level +7dBm

Damage Level 25dBmpeak

+33dBm with Option 11 high

power limiter

Input Connector PC 3.5 female

Input VSWR <2:1 to 10GHz

<3 :1to 20GHz

AM Tolerance >90% (for trough > minimum

pk-pk sensitivity)

2151 OPS

A1571/DA

ALGl/Iss.01/03.94

FMTolerance

Mode Modulation Rate FMTolerance

Max. Deviation

Automatic

Normal

Low FM

Track

1kHz -10MHz

45Hz -10MHz

300kHz -10MHz

20MHzpk-pk

20MHz pk-pk

Manual 1kHz -10MHz 60MHz pk-pk

Aquisition Time

Mode Aquisition Time

Automatic

Normal <125mSec

Low FM <1.255mSec

Track <60mSec

Manual <20raSec

Tracking Speed

Mode Tracking Speed

Normal IMHz/Sec

Low FM 80kHz/Sec

Track 1GHz/Sec

Amplitude

Discrimination

(typical) 6dB for signals within 500MHz

20dB for signals at any frequency

Spillback ^-50dBm

(-70dBm if Input Aor Bselected,

or sleep mode)

Input CModes of Operation:

Normal Counter acquires and measures

frequency of the highest level

signal within the sensitivity range

(subject to amplitude

discrimination specifications).

Optimum internal local oscillator

frequency and harmonic number

are determined automatically.

1-1

Low FM For low modulation rates, Low FM

Mode selects an extended

acquisition time

Track For faster measurement and data

output rates, Track Mode selects

the fastest possible acquisition

cycle and tracks the movement of

fast moving input frequencies

Manual For fastest measurement and data

output rates, Manual Mode

suspends automatic operation and

microprocessor calculates

optimum internal local oscillator

frequency and harmonic number

from auser-entered centre

frequency

NB user enters centre frequency

to within +20MHz of input

frequency (±3MHz below 1GHz)

and for full FM tolerance frequency

mustbe entered with ±1 MHz

IF OUTPUT

Available when measurements are made using Input C

in Manual Mode. Available intermittently during

gate time in Auto Mode (due to acquisition cycle).

Frequency Range

Automatic Mode

and Manual Mode 41MHz to 112MHz

Output Level -lOdBm nominal

Output Impedance 50 ohms nominal

Reverse Damage

Level 50V (DC +AC rms) to 210 KHz,

decreasing to 3V rms at

3.5 MHz and above.

MEASUREMENT MODES

Frequency Aand B:

Range Frequency A10Hz to 100MHz

Range Frequency B40MHz to 1.3 GHz

Digits Displayed

(Resolution) 3tolO digits

LSD Displayed (Hz) Fx10 °

(F =frequency rounded up to

next decade, D=no. of digits)

Frequency C:

Range 500MHz to 20GHz

LSD Displayed

(Resolution) 0.1Hz to 1MHz (selectable)

Ratio B/A:

Available as both software and hardware ratio

Range 40MHz to 1.3 GHz

10Hz to 100MHz

LSD Software (Ratio xF0xlO"$D=B))

D=No. of digits, F0=Input B

frequency rounded to next decade

LSD Hardware 6-9 digits 640 xRatio

Fa xGate Time

3-5 digits As above or Ratio x

10(4'D| whichever is

the greater (D =No.

of digits)

Resolution +LSD +1.4 xATrig Error x Ratio

LGate Time _l

Trigger Error =[E. 2+E2]m

.I... IL—

Slew rate at Trigger Point

Ej =Input noise in 100MHz BW

En=Input amplifier noise

Accuracy +Resolution

Ratio C/A, C/B:

Available as software ratio only

Range C/A 500MHz to 20GHz

lOHzto 100MHz

Range C/B 500MHz to 20GHz

Resolution

(Ratio xFcx10' tD+B))

D=No. of digits selected

Fc=Frequency into input C

rounded to next decade

0.1Hz to 1MHz (selectable)

Accuracy (C/A) ±(accuracy of Fc)±accuracy ofF4

^Fa

Accuracy(C/B) ±(accuracy of Fc)±accuracy of FR

F~ F„

1-2 2151 OPS

A1571/DA

ALOl/Iss.0 1/03.94

Math: Standard Output:

Multiply

Offset

Smooth

Used to multiply readings by the

factor held in the Multipiy store Frequency

(user defined number)

Level

Used to automatically offset

readings by the factor held in the

offset store. The factor may be the

current reading or auser defined impedance

number.

10MHz

TTL compatible giving approxi-

mately IV p-p into 50 ohms

90 ohms nominal

Selects arunning average function Maximum reverse

resolution e] et^to^the °S“ aPP'ied l”P“t*15V with n°PeImanent

of the input signal

T1MEBASE SPECIFICATIONS GENERAL SPECIFICATIONS

Internal Standard:

(TCXO) Gate Times

Frequency 10MHz Range

Adjusiment

Range

Aging

±5ppm min.(multiple turn

trimmer)

lppm7year Sample Rate

Temp. Stability ±lppm max. with respect to

frequency at 25DCfrom 0DCto 40DCFront Panel:

External Standard Input: Indicators

Frequency 10MHz

Signal Range

Damage Level

lOOmV rms (sine)tolOVrms (sine)

10V rms (sine) Input/Output

Connectors

Input Impedance lkohm nominal

for signals <IV pk-pk

500 ohm nominal

for signals >10V pk-pk

Coupling AC coupled

VXlbus "CLK10"

Standard A10 MHz system clock is sourced

from the VXlbus slot 0controller,

distributed on connector P2,

differential ECL

Rear Panel

Components

Reference Clock If an external 10MHz reference is

connected via front panel input, it

will automatically override the

internal TCXO reference. This is

the ’’counter reference"

Side Panel

Components

Interface commands enable

selection of reference from

"counter reference" or from

"CLK10" input available on

VXlbus backplane

Check 10MHz displayed

Automatically determined

depending on resolution selected

lmSec to 20Sec (lOSec max. for

channel C)

Rate selectable and the value

displayed

Fail :Red

Active :Amber

Gate ;Green

Power :Green

Achannel input (BNC female)

Bchannel input (BNC female)

Cchannel input precision

connector, PC 3.5 female)

External standard input (BNC

female)

10MHz standard output (BNC

female)

IF output for Channel C(BNC

female)

VXlbus interface sockets Pi and

P2 (96-pin DIN pattern)

Logical address selection switches

interrupt level selection switch

2151 OPS

A1571/DA

AL01/Iss.01/03.94

Ce manuel convient aux modèles suivants

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