Pendulum CNT-66 User manual

CNT-66
Programmable Timer/Counter
Users Manual
I

II
4031 600 66001
Rev. 01 (September 2000)
This manual, in whole or in part, may not be copied without permission.
All product name are trademarks of their respective companies.
© 2000 Pendulum Instruments AB
All rights reserved. Printed in Sweden.

Table of Contents
EC DECLARATION OF CONFORMITY ........ IV
1 Safety Instructions
Safety ............................. 1-2
Introduction ............................. 1-2
2 Product Presentation
General ................................ 2-2
Rear View .............................. 2-2
Front View .............................. 2-3
3 Installation
Unpacking .............................. 3-2
Voltage Range Selection................... 3-2
Grounding .............................. 3-3
Connecting External Reference ............. 3-3
Installing the Rack Mount Adapter ........... 3-3
4 Operating Instructions
Using the Timer/Counter ................... 4-2
Error Codes............................ 4-14
5 GPIB-interface Operation
Introduction ............................. 5-2
What can I do using the Bus? ............... 5-2
Connecting the Controller .................. 5-3
Giving the Counter an Address .............. 5-3
Checking the Communication ............... 5-3
Two Ways of Programming................. 5-4
Syntax ................................. 5-4
Selecting Output Separator................. 5-5
How to Select Function .................... 5-5
Selecting Measuring-Time.................. 5-6
Selecting Input settings .................... 5-6
Totalize Start/Stop........................ 5-7
Free-Run/Triggered....................... 5-7
Service Request ......................... 5-8
Status Byte ............................. 5-8
Output Mode ........................... 5-10
Bus Learn ............................. 5-12
Programming Data Out ................... 5-12
What Happens When I Switch to Local?...... 5-12
Summary of Bus Commands .............. 5-13
Programming Examples .................. 5-14
6 Performance Check
Performance Check....................... 6-2
7 Calibration and Adjustment
Calibration .............................. 7-2
Timebase References ..................... 7-3
8 Specifications
Measuring Functions...................... 8-2
Input-A and Input-B ....................... 8-3
Input C ................................ 8-3
External Reference Input D .................. 8-3
Auxiliary Functions ....................... 8-4
Definitions .............................. 8-4
General Specifications .................... 8-5
Environmental Data....................... 8-6
Mechanical Data ......................... 8-6
Optional Accessories...................... 8-6
Ordering Information ...................... 8-7
9 Appendix
Checking the Sensitivity of Counters.......... 9-2
10 Service
Sales and Service office................ II
GUARANTEE STATEMENT ................. III
11 Index
Index ............................... II
III

IV
EC DECLARATION OF CONFORMITY
Number: 4031 100 63700A41
The undersigned, representing the following manufacturer:
Manufacturer:
Pendulum Instruments AB
Sorterargatan 26, Box 541
SE-162 15 Vällingby, Sweden
Representative: Jan Herwe
Function: Quality Manager
herewith declare that the product:
Product Identification:
Product: Timer/Counter
Brand: Pendulum
Model: CNT-66
Version: All models
is in conformance with the EC Directive 89/336/EEC based on test results using harmonized standards in accordance with
Article 10(1) of the directive and the directive LVD-73/23/EEC.
Test report no: Title
Safety release certificate March 18, 1996
SEMKO EMC test report 953210I.3
CEM-Consult AB: CC-EMC/88-1044
Harmonized standards used:
Safety: EN 61010-1 (1990) + A1 (1992) + A2 (1995) CAT II
EMC: EN 55011 (1991) Group 1, Class B
EN 50082-1 (1992)
Place: Vällingby Date: 2000-05-29
This Conformity is indicated by the symbol , i.e. “Conformité européenne”.

Chapter 1
Safety Instructions

Safety
Introduction
Read this page carefully before you install and use the
CNT-66 Timer/Counter.
This Timer/Counter has been designed and tested in accor-
dance with EN 61010-1 and has been supplied in a safe
condition. The user of this instrument must have the re-
quired knowledge of CNT-66. This knowledge can be
gained by thoroughly studying this manual.
Safety Precautions
Use generally-accepted safety procedures, in addition to the
safety precautions stated in this manual, to ensure personal
safety and safe operation of the Timer/Counter.
Caution and Warning Statements
You will find specific warning and caution statements, where
necessary throughout the manual. Do not carry out repairs
or adjustments to the Timer/Counter without reading the
Service Manual, which contains the relevant warnings for
such activities.
CAUTION: Indicates where incorrect operating pro-
cedures can cause damage to, or
destruction of, equipment or other property.
WARNING: Indicates a potential danger that re-
quires correct procedures or practices in
order to prevent personal injury.
Symbols
Indicates where the protective ground lead is
connected inside the instrument. Never un-
screw or loosen this screw.
Signal Ground symbol. This symbol indicates
that the signal ground of the connectors are in-
ternally connected to the other connectors with
the same symbol, and to parts that are easily
accessible for the user.
Indicates that the operator should consult
the manual.
Such symbols are printed near the input connectors. This
symbol on the instrument should encourage the user to use
the correct procedure for common instrument ground, and
maximum input voltages, as described in the Installation
and Specification chapters.
If in Doubt About Safety
Whenever you suspect that it is unsafe to use the instru-
ment, you must make it inoperative, clearly mark it to pre-
vent its further operation, and inform the Pendulum servic-
ing department.
E.g.The instrument is likely to be unsafe if it is visibly dam-
aged.
Safety Instructions
1-2 Introduction

Chapter 2
Product Presentation

General
The CNT-66 is a compact, high resolution, reciprocal
Timer/Counter which performs many functions. A number of
options are available i.e. HF-input, GPIB-interface and high
stability oscillator.
A rack-mount kit and a carrying case are also available as
accessories.
Rear View
S) Rear feet.
T) Screws for removing the cover.
U) External-reference-input, BNC connector.
V) Voltage-range selector.
W) Power-inlet socket.
X) GPIB interface-connector (optional).
Y) GPIB address-selector ( option).
Product Presentation
2-2 General
M AINS TRANSFORM ER
INCLUDED OPTIONS
OPTION 08
OPTION 07
OPTION 04
ADDRESS
10M H z 0.5-15V rm s
IE E E 4 8 8 IN T E R F A C E
EXT REF INPUT
OPTION
TALK O N LY
16
LR 39484
VOLTAGE
SELECTOR
OFF
8421
ON DC1, DT1
E2
S R 1 , R L 1
S H 1 , A H 1
FUNCTIONS:
SUPPO RTED
T 5 , L 4
T H E R M A L F U S E IN
S T U V
W T
S
X
Y
OPTION
OPTION
Figure 2-1 Rear View

Front View
A) Power switch.
B) Reset button, doubles as Local button if the
Timer/Counter is equipped with an GPIB interface.
Starts and stops counting if the TOT A MAN func-
tion is selected.
C) Measuring-time selector-button. *
D) Function-selector button. *
E) Display-hold button. Freezes the display.
F) COM B via A button connects the signal on input A
to input B. The Input-A attenuator and AC/DC
switch affect both inputs.
G) Input-C BNC-connector (optional).
H) Input-A BNC-connector.
I) Set value button, depress to set sensitivity (AC) or
trigger level (DC).
J) Auto level, starts automatic trigger level setting. If
‘Set Value’ is selected, this button is used to in-
crease the value.
K) Read level, displays trigger levels. If ‘Set Value’ is
depressed, this button is used to decrease the
value.
L) Input-B BNC-connector.
M) Trigger indicators.
N) Attenuator buttons.
O) Slope selection buttons.
P) DC or AC coupling selection buttons.
Q) Large LCD-display.
R) Tilting support.
* The selected function is indicated on the display. A
short press on the button moves the cursor one
step to the right. A long press makes the cursor
scroll.
Product Presentation
2-3 Front View
SET A SET B
35pF
ATTx1
FREQ
STANDBY
ON
A
HOLD
DISPL
TO T A
COMMON
P E R IO D T IM ERATIO
A/B
START/STO P
TO TALIZE A
LO C A L
RESET
AA-B
FU NC TIO N
B
HOLD
DISPLAY
B via A
T O T A T O T A V O L T A
MAX-MIN
B via A
COM M ON
BMAN
LEV E L
READ
REF
EXT
LEV E L
AUTO
35pF
ATTx1
M AX 30Vrm s
DC - 160M Hz
A
LEVEL
AUTO READ
LEVEL
B
DC TRIG G ER LEVEL
DC DC
x10
AC SENSITIVITY
AC
AC x10
SINGLE
TIM E
M EAS
10s
M EASURING TIM E
0.2s 1s
FREQ
C
M AX 12Vrm s
70M H z - 1.3G H z
C
M AX 30Vrm s
50 W 1M 91M 9
ABCD E FG IM J R H
L
K
M
I
Q N O PON
Figure 2-2 Front View

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Product Presentation
2-4 Front View