HP 5315 A Service manual

5315A/B
100 MHz UNIVERSAL COUNTER
OPERATING AND SERVICE MANUAL
SERIAL PREFIX: l8l2A
This manual applies to Serial Prefix 1832A, unless
accompanied by a Manual
Change Sh eet indicating
otherwise.
Copvri~1 HEWLETT-PACKARD COMPANY 1978
5301 STEVENS CREEK
8LVD., SANTA CLARA. CA LI F. 95050
M..\NUAl PART NUMBER 05315-'JOOO1
Microfiche Put Number 05315- 90003
Printed: SfP 1978
HEWLETT bXI PACKARD

Mo d el 531S A/ B
Table of Co nten ts
Secti on
II
III
ii
T ABLE OF CONTENTS
GE NE RAL INFO RMA TI ON .....•..• • .••... •••• ••.. •••.. ••. ..••••.. .
1-1. Introdu ct ion ............ .... . .•.... • ....• ... .. , . . ....•. . ...
1-4. D esc ripti on ... .......... .• ... . ........•.... . .. • ... .• ...... .
1-8. Options . . .. . ... ........ . . .. , . •. .. .•. .. ... .• . . . ... . •.... . . .
1-10. Specifica
ti ons . .. ........ . .... .•. . , . •. ....... . •. ...•• .. .... .
1-12. Safe ty Considerati ons ...... . . . . . .. . .. . .. ... . . .. . . ... . . . . ... .
1-
14 . Ins tr ument Identification ............ . .. • ....•. . . . . ..•.. . ....
1-16. Accesso ri es ....... . ......... . ...... . ..•... .• ..•.... •. ......
1-1 8. Recommended T est Equipment ...... . .. . .. , . • .. • ....•.......
I NS TALLATION . ...... ......... . . ........ •••• ••..• ••• •. •• • ••• •. ...
2-1. Introducti on .. .. .. . ...... . ....•.... • ..•....•. .. .... . .......
2-3. U npa ck ing and Insp ec ti on ...... .. ... . ......... . .... . ...... .
2-5. Prepar
at ion for Use . .. . . . ......•..•....•..•....•....•..•....
2-6. Power Requireme nt s ..........•... . . • . •• .. .. • ... .• . •• . ...
2-8. lin e Voltage Se lection . . .. . ........ . .. . .... . ......... .. .. .
2-16.
Po wer Cable .. ........ .. . .. .. .. • .... • .. •.. .. • ..•.. . .. . .. .
2-18. Operating En vironment .. . ... .. . •.. , . . . .•.• . . •... .• .. •. .. .
2-22. St ora ge a nd Shipme nt ....... . .......... . .. . ... . .. . .... . ... .
2-23. En
vi ronment . ... . ........ .. .. . ••... . •. • •. . . . . . .. . •. ......
2-26 . Pa ckaging . ............... . ....•. .. . •..• ....•.... •.. •....
2-29. Fi eld I ns ta lla ti on of Optio ns .. . ............................. .
OPERATI ON . ...... .......... ... .. . .. •••• .. .• . •••• • •• ... • •.• ••...
3 -1 .
3-3.
3-5.
3-8.
3-1 0.
3- 12 .
3-14.
3-1 9.
3-1 9.
3-21 .
3-23.
3-
25.
3-2 7.
3-29.
3-31.
3-33.
3- 38.
3-41.
3-43.
3-45.
3-
47 .
3-48.
3- 50 .
3-51.
3-5
2.
3·55.
3-5 7.
Introduction ............ .. . .. . •. . . ... . •.. .. ... . ...... . . . .. .
Op er at in g Characte ri s ti cs ... .• .... . .. . .......... . . . .... • ....
Power-Up Self Ch ec k .... . ........ . .. .. ... . .... . ........... .
Mo d es of Op eration . .... . ... . . •. . . .... • .• . .... • .. . . . .•• . ...
FR EQ A .............. .. . . . .... . .. ..... . . ... . .... . ... . .. .
PER A .. .. ................ • .. • ....•....• . .•.... • ....•....
T, I. A- B , ......... .. .. , .... ... .... .. .. ...... .. .. ....... ..
T.1. A ve A- B . .... , .•. . ...• .• •.• . ••. . .. • ... .. ..•.... . ....
T.1. DELAy ....... , ... . . • .•. . ... •. ...•. .. .... • ... . • . . •. ...
RATIO Al B ....................... .. ........ .... ....... ..
A BYB ........ .. , ...... . . . .... ..... ........... . .... . ... .
TOT STOP/ ST A RT ......... ...... ...... .... .. .... ....... ..
CH EC K ............... , ... .. ................... .. .... .. ..
Display Ch ec k ........ . ... . ....•. •• . ...• . •. . , .. •. . .••. ...
Pan el Fe at u res and Controls .. .. ... .. ...... . ... .... . ........ .
Fun ction Se le ction Controls .... . ............... . ....... . .. . .
Sign al Co nd itio ni ng Controls ... . . .... . .... . ......... .. . . . .. .
Trigger Level/Sensitivi
ty Co ntro ls ..... ... .. . . ... .. . . ........ .
Dis pl ay . . .. . ................ .. ..... . •....• . ... •. .•.•.• . ... .
Oper at or 's Check ....... ...... .... . ........... . ..•. • .... ...
Operating I nstr uctions ... . . ..... ........... .. . ... . •. ... •. . ..
M ea su rement Procedur es . .... . ............. . .. . ........ . .. .
Fr equen cy, Peri od, a nd Ra tio Measureme nt s ..... •.•. . . ....
Time Inte rva l Measurements ...... . ........ . .... . .. .... . . .
E
rr or Messa ges ........ ......... ..... ............. . .... • ....
Operator's Main tenan ce .. . ... . ........ •. . .. ...•.... •. . . ....
Power lW arm-Up ...... .. ... . . .. . , . •.•.••.•.. • , . •. •. .. ....
P"'ge
1-1
1-1
1-1
1-1
1-1
1-4
1-4
1-4
1-4
2-1
2-1
2 -1
2-1
2-1
2-1
2-3
2-3
2-4
2-4
2-4
2-5
3-1
3-1
3-1
3-1
3
-1
3- 2
3-2
3-2
3-2
3 -3
3-3
3-3
3-4
3-4
3-4
3-5
3-5
3-5
3-7
3-7
3-7
3-8
3-8
3-8
3-9
3·10
3-10
3-10

Mode l 5315A/ B
Table
of Co n te nts
TABLE OF CONTENTS (Continued)
Section
IV PERfORMA NC E TEST S .............••.... •. . . ...• . . •. ••• ... ..••...
4-1. Introduction . .. ... . .......... . ....•..•....•.......•....•...
4- 3. Operational Verificati on ....•. • .......•....•.. •. ...•.. • .... .
4- 5. Equipment Required .... ..... •..• . •..•.. . .. . . •. •..•.. . . ....
4-7. Test R ec ord .. ........... .... . •.. . .• . . ... . . . . . ..... •.. •. •...
V ADJUSTMENTS .. . .............•..• . • ..... .. •....•.. •. ... • ..•.....
5-1. Intr oductio n ............... . .. ....... • .... • .. . ....•..•.....
5-4. Equipment Required .................•.. •. • .. • ....•.. • .. . ..
5-6. F actory Selected Com pon ents . ......... . ... .. . . ... . .. ..... . .
5-
8. Ad jus tme nt l ocation s . .. ............ .. •. .•. •. _•. •• . . .•• .•...
5-10. Adju s tment Proced ur es ..... .. ......•.•..•....•. ... • .. • .....
5-11. 5315A Voltage Selector ___ __ .•.•. _. .. .. • ....•..•....•.... .
5-13. Power S upp ly Ad justme nt . _. .. ........... . .... ... . .... .. ... _
5-15. Input Offset Adjust ment s . ...... .......... . .. . •. • .... . •.... _
5-17. L oc al Oscillator Adjus tm ents .. ........... ..... •.. . ....•... ..
5-19. Opt ion 001 Osci ll ator Adjustment ................•....•.... .
5-20.
Option 002 Battery Charger Adjustment .. .. ....... •. , .. • .. _. .
VI REPLA C EABL E PART S ... . ..... .......... ........... .. ............ .
6-1 . Intr oductio n . _ ........... . . • ..•....•....•.......•..•.......
6-3. A bbr ev iations ............•....•....•.......• ... .•..•. . .... .
6-5. Replac eable Parts li st ......... . ..... . .... . .... . ... . .. . . . . .. .
6-
9. Ordering I nformat i on ......... . .... . . .. ... _ ... ..... ....... .
6-12. Parts Pro
vis ioning .. , .......... . .... ... . . •. . ... ..•.. . .... .. .
6-14. Dir
ect Mail Order System . _ .. .. •.. ........ . . • ....•..•.... __ .
VII MANUAL CHANGES .. . ............ . .. . ......... _ .. . .. . ... ....... .
7-1. Int
roduction ..... . ..... . .• . ...•... . • ....•.. . ....•..•... . ...
7- 3. Ma nu al Changes ....... . ....•.... • ....•..•. •..• ....•..... . .
V II I SERV ICE ..• .. ... . .............. • .••.• . . . . ••• ••..•• . • •...•• . .. . . . .
8-1 . Intro du ction . _ ......... .. . ... . •.. ... . . ..... •. . • . . ..• . . . ... .
8-3. Theory of Operati on ................ . ............ . ........ .
8-5.
Troubleshooting .................... •. •.......•.......•....
8-8. Recommended Test Equipment .... _. _. _ ... . _ .... .. . .•.. .. . ..
8-10. Sch ematic Diagram No t es ................. . _. _. .... , ... . ... .
8-12. Refe ren
ce Desi gnations .......... .. . .... .. . .. ........•... .
8-14. Identification Markings
on Pr inted Circuit Boards ......•....
8-17. Sa f ety Cons i deration s ....... . .......................... • ... .
8-
21. Service Ai ds ..................... . ........... . ............ .
8-22. P
ozidr iv Screwdrivers ........... . ................ . .. . .. . . .
8-24. Service Aids o n
Printed Circuit B oards ...... . . . . . •. ••.••. ..
8-26. As sembly Identification .. .... ...... . ... . ... . ............ . .
8-
28. Th eory of Operati on ...... ... ..... ............. • ....•......
8- 29 . I ntroduct i on . ... .. ...... .... . •. .. .• . . ... . . . . ... ...... ... .
8-
31. O ve rall Block Th eo ry .........•.• .. • .• . .... •. . •.•.. .. ••.. .
8-36. Assembly Circuit Th eo ry ......... . .... . . _. _. .. . .... . .. . .. .
8-38. A1
Motherboard . . ........ . .....•..•.. ....... •....... •...
8-SO. A2 Di sp la y Asse mb y ...... . .. . .. . . . ............ . ......... .
8-52.
A3 Input Assembly .. .. ... . ... .. ... . .... . .. .... . ...... . . . .
Page
4-1
4-1
4· 1
4·1
4·1
5·1
5·1
5-1
5-1
5-1
5·2
5 ·2
5·2
5·4
5-4
H
5·5
6-1
6-1
6-1
6-1
6-1
6·2
6·2
7·1
7-1
7-1
8-1
8-1
8-1
8·1
8·1
8·1
8-1
8-2
8-2
8-4
8-4
8-4
8 ·4
8 ·4
8-4
8-6
8-6
8-6
8-8
8-8
iii

Mode l 53 15A/B
Ta ble of Co n te nts
li st of Tables
Section
Table
1-1.
1-2.
1-3.
1·4.
2-1.
2-2.
3-1.
4·1.
4· 2.
5·1.
6-1.
6-2.
6-3.
6· 1.
6-2.
,y
6-56.
6-60.
6-61.
6-63.
6· 65.
6-67.
6-69.
6-71.
6-75.
6-77.
6·79.
6·61.
6-63.
6-65.
6-67.
6-69.
6-91.
TABLE OF CONTENTS(C ontinued)
A4 Amplifier Assemb ly ............. _ ............ _. • .. _ ... .
Options Theory ( Options 002 and 00 1) ............•..•.......
A6 Ba ttery Ch ar ger Assembly Op ti on 002 .....•. _ .. . ....... .
Battery Charging Cycle
........ . .... ........••....• . ..... .
Battery Discharge Cycle
...... . .... . .........•• •••. •. ......
Idle Charge ................. . .......... • .... • .. . .•.......
Ba ttery Annun ci ato rs .. . .................. . .. . .... • .......
A6 Char ge r Assembly Ci rcuit Th eory ....... . . ........... . . .
A7 TCXO Opti on 001 ................................. . .. .
Tro
ub leshooting Test Pr oced ures ......................... .
T
es t Pr oced ure 1, P owe r Su pply ................... . . . .... .
T
es t Pr oce du re 2, Micr ocomp ut er, Dis pl ay, and Data Bus ... _
Test P roce du re 3, In ternal Referen ce Oscillator ............ .
Test
Pr oce dur e 4, I np ut Amplifiers ..... .. ................. .
Test
Pr ocedure 5, F ron t Panel Switches . . ............. . .... .
Test Pr
ocedure 6, Mul tiple Register Cou n ter (MR C) ........ .
Test Pr
oc ed ure 7, AC/DC Ope ration ( Op tion (02) ......... .
LIST O F TABLES
Page
6-6
6-9
6-9
6-9
6· 11
6- 11
6- 11
6- 11
6- 12
6-12
6-12
6-13
6-14
6-15
6-17
6-17
6
-1 7
Pag e
53 1 5A/B Spe cifi ca ti on s . .... ... ........................... . ....... . 1-2
Accessories S upp lied .... . ............ . .. . ......... . .... . .. . ... . ... 1-4
Accessories Av ai l ab le ........ _....... ... .................... . .... . 1-4
Recomme nd ed Test Eq uipment ......• . .• . .. . •.•• . .. . • .• •. •. •.. . 1-4
Op tion 00 1 Installation
Option
002 Installation 2-5
2-5
Display Check . _. _. . . . . . . . . . . . .•. ••. . . . •. . •••. •• .• . . •. . . . •. • •. . . . . 3-5
Opera tional Ve rification _.......... . .... . .... . .. . ... . . ............. 4-2
In-Cabin et Perf orm a nce Test ......•.... • ....•.. . .... • .... . .. • ..... 4-5
Adju stments ... _. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ••. • •. •. •. . . .• •. . . 5-1
R
efe r ence Designa ti ons and Abbreviations ...... . .•. . .....•...... __ 6-2
R eplaceable Pa r ts ..................... . .......•..... . . . ........... 6-4
Manufacturers
Co de Li st .............. . ...... . .. . . .... .. .. . ... . ... 6-17
Assemb ly Id en tifi cation
Ba tter y- Pa ck Operation 6-4 6-9

Figure
1-1.
2-1.
2- 2_
2-3.
3-1 .
3-2.
3-3.
3-4.
3-5.
3-6.
3-7.
3-8.
3-9.
3-10.
3-11.
3-12.
3-13.
3-14.
3-1
5.
3-16.
3-17.
5-1 .
5-2.
5-3.
6 -1 .
6- 2.
6-3.
8-1 .
8-2.
8-3.
8-4.
8-5.
8-6.
8-7.
8-8.
8-9.
LIST OF FIGURES
Models 5315A and 5315B U ni ver sa l Counters ... 0.00 ••• 0 • • • 00 •••• ••••
53 15A line Voltage Selection 0 •• 0 ••••••• • •••••••••••• 0 •••••• • • 0 ••••
53158 li ne Vohage Selection .... 0.00 • • •••••••••••••• 0 ••••• 0 •• 0 • • 0 •
Power Ca bl e HP Part N umb ers versus Ma i ns Plug Available ..... 0 • •••
Tol. Aver ag e Dead Time . . 0 •• • • •• • • 0 •••• •••••• ••••• • ••••••• • • 0 • • • ••
T ol. DELAY 0 ••• 00 . 0.0 •• • • 0 • • • 00 . 00 0 • • •••••••• • •••• • 0. 0 . 0 • • 0 . 0 ••• o.
Totalize Modes ... 0 •••• 0.0 •••••••• 0 •• 00 •••••• 0.0 ••• 0 •••••• 0 . 0 0 • • 0.
5315A / B Front End Block ........... 0 • • 0.0 . 0 ••• 0 •• • ••• 0.0 •• 0 ...... .
Trigger Le ve l/Sensitivity Controls ....•. .. . •.• • ... 0 ...... . ........ . .
AC Co upled Meas urem ents ' ... '.0 •. ••• • • • • ••••• • •••• • • • •• ••• •• ...
DC Coupled Measurements .. 0 ••••••••••• • ••••• • •••••••••••• • •••••
Fr ont Panel Features .... 0 •• 0 ••••• •• ••••••••• •• ••• • •• • •••••••••••••
53158 Rear Panel features .... 0 ••• • •••••••••• •• • • •••• • • •• • • •• ••• •• 0
Operator 's Check ...... 0.0 • • 0 •••••••••••••• • • • • ••••• •• ••• ••• •• ••••
Frequency A/ Period A Measurements ........ . ..... . . . . . .. . .. . .... .
Ti me Interval Meas ur ement .0. 0 • 0 • 0 ••••••• ••• 0 ••• 0 • 0 • 0 •• 0 • 0 • • • 0 • 0 •
Time Interval Delay Measurement ...... 0.0 . 0.0 • • •••••••••••• • •••• •
Time Interval Average A-B ........ . ..•.•.• • ... 0 • • 0 • 0 •••••••• • •••••
Ra tio A/B Measureme nt s .... ...... . ..•.•.••... • •. •• ••• ••... •• . • ...
A 8Y B Measurements
Totali
ze Measurement .... '.0 • • 0 ••••• ••• •••• 0 ••••••• 0 •••••••••••••
Adjustment Co mponent Locator . .. 00 • • •••• • •••• • •• •• , • • • • • •• ••••••
Option 001 Oscillat or Adjustmen t .. 0 • 0 •••••••• ••• ••• 0 • •• • 0 •• •• 0 • • 0 •
Option 002 Battery Charger Adjustme nt ....... . .. 0 • • • 0.0. 0 0 • 0 • 0 • 0 ••
Model 53 15A Mechanical Parts Layout .........•....•..•.• ' .•.. 0 •• 0
Model 53 158 Mechanical Parts La yo ut ....... .. . ..... . . .. .. . .. .. . .. .
Option 002 Rechargeable Battery ...... . ......•..•....•....•..
Sc hematic Diagram No t es ...... 0.0.0 ••••••••••••••••• • •••• • •••••• 0
Overall Block Diagram ...... . .... 0.0.0 •••• •••• ••• ••• • •••• •• •• • • 0 • •
Battery-Pack ( Opt i on 002) Bl ock Diagram 0 ••••• 0 ••• •• • • ••••• 0 0 ••••••
Troubleshoot ing Block Diagram 0 • • • 0 ••• 00.0.0 •••• • ••• 0 •••••••• •• 0 ••
Top Internal Model 53 15A ............................ .. .......... .
Top Internal
Mode l 53 158 . ....................................... .
Al /
A2IA5 /A7/A8 Motherboard /Display Sc hemat ic Diagram .....•....
A3/A4 Input Switch/ Amplifier Sc he ma tic Diagrams ...... 0 0 ••••••••••
A6 I:t attery Charger Schematic Diagram . . .......... . . , .•...... 0 •••••
Mo de l 5315A/ 8
li st of Fi gur es
Page
1-0
2-1
2-2
2-3
3-2
3-3
3-4
3-6
3-7
3-8
3-9
3- 11
3-14
3-15
3-16
3 -1 7
3-18
3-19
3-20
3-21
3- 22
5-3
5-6
5-7
6-14
3 -1 5
6-16
8-3
8-5
8-10
8-19
8-20
8-21
6-25
8-27
8-29
v

Model 5315A /B
Safety Considerations
YO
SAFETY CONSIDERA liONS
GENERAL
This is a Safety Class I instrument. Thi s in strument has bee n designed and testedaccording to IEC
Publication 348 , "Safety Requirements for Electronic Measuring Apparatus."
OPERATION
BEfORE APPl VING POWER verifythat th e power transfo rm erprimary is matched to the available
line volta ge and the co rr ect fuse is in stalled (see Section II ). Make sure that only fu ses with the
r
eq uired rat ed current and of the specifi ed type (normal blow, time delay, etc.) are used for
replacement.
Th e use of r epa ir ed fuses and the short-circuiting of fuseholders must be avoided.
SERVICE
Although this instrument has been designed in accordance w it h international safety standards,
this manual contains information, cautions, and warn
in gs which must be followed to ensuresafe
ope ration and to r eta in the instrument in safe co nditi on. Service and adjustments shou ld be
performed o
nl y by qua li fied service personne l.
Any adjustment, maintenance, and rep ai r of the opene d in strum ent under voltage shou ld be
avoided
as much as possible and, when inev it able, should be carried out o nl ybya skil l ed person
who
is aware of the hazard in volved.
Capacitors insi
de the instrument ma ystill becharged eve n if the in stru menthas been disconnec-
ted from its sour
ce of supply.
Whenever
it is likelythat the protection has been impaired, the instrument must be m ade inoper-
ative and
be secured against any unintended ope ration.

Mode l 5315A/ B
Safety Considerations
WARNING
IF THIS INSTRUMENT IS TO BE ENERGIZEDVIA AN AUTOTRANSFORMER (FOR
VOLTAGE REDUCTION) MAkE SURE THE COMMON TERMINAL IS CONNEC-
TED TO THE EARTHED POLE OF THE POWER SOURCE.
WARNING
BEFORE SWITCHING ON THE INSTRUMENT, THE PROTECTIVE EARTH TERMI-
NALS OF THE INSTRUMENT MUST BE CONNECTED TO THE PROTECTIVE CON·
DUCTOR OF THE (MAINS) POWER CORD. THE MAINS PLUG SHALL ONLY BE
INSERTED IN A SOCkET OUTLET PROVIDED WITH A PROTECTIVE EARTH
CONTACT. THE PROTECTIVE ACTION MUST NOT BE NEGATED BYTHE USE OF
AN EXTENSION CORD (POWER CABLE ) WITHOUT A PROTECTIVE CONDUC-
TOR (GROUNDING) .
WARNING
THE SERVICE INFORMATION FOUND IN THIS MANUAL IS OFTEN USED WITH
POWER SUPPLIED
AND PROTECTIVE COVERS REMOVED FROM THE INSTRU-
MENT. ENERGY AVAILABLE AT MANY POINTS MAY, IF CONTACTED, RESULT
IN PERSONAL INJURY. I
CAUTION
Before switching on this instrument:
1. M~ke sure the instrument is set to the vollilge of the power source .
2. Ensure th~t all devices connected to this instrumentare connected to the
protective (earth) ground.
3. Ensure th~t the line power (Mains) plug is connected to a three-conductor
line power outlet that has ~ protective (earth) ground. (Grounding one
conductor of a two-conductor outlet is not sufficient.)
4. M~ke sure that only fuses with the requiredrated current and of the speci-
fied type (normal blow, timedelay, etc.) areusedfor replacement.The use
of repaired fuses
and the short-circuitingoffuse holdersmust be avoided.
vi i

Model 5315A/8
General Information
1-0
_---" . , _ ,_ L : C C -:
[l ~ ~ J •. , .~ . ~J
[
53158
Figure 1-1. Models 5315A and 5315B Universal Counte rs

Model 5315 A/ B
General Informati
on
1-1. INTRODUCTION
SECTION I
GENERAL INFORMATION
1-2. This manual provides information pertaining to the installation, operation, testing, adjust-
ments, and maintenance of the HP Mode l 53 1 5A and 53158 Universal Co unters, shown
in Figure 1-1.
1- 3. This manual is divided into eightsections, each covering a particular topic for the operating
and service of the
HP Model S31SA / 8. The top ics by section number are:
Sedion Topic
General Information
II Installation
lit Operation
IV Performance Tests
V Adjustments
VI Replaceable Parts
V II Manual Changes
VIrI Service
1-4. DESCRIPTION
1-5. The Hewlett-Packard Model 5315A and 53158 are universal co unters, measuring signals
over a range from
0.1 Hz to 100 MHz. Th e 5315A / B measures Fr e qu ency, Period, Time Interval,
Time Interval Ave ra ge, Time Inter val Holdoff (Delay), and Ratio. ATotalize functi on with manual
or external gating is al
so provided. A ll measurements except Totalize are displayed in engineer-
ing notation with up to eight digits of resolution.
1-6. Two independent input channels are prOVided for time interval measurements. Each input
channel has an attenuator (Xl,
X20 ), trigger slope sel ecto r, tr igg er level/sensitiv it y control, and
ac-dc coupling. A switchable low-pass fitter
on Channe l A and 3-state trigger lights are also
provided.
1-7. The
53 158 is functionally identical to the 53 1 5A. The major differ ence is that the 53 15 B is
designed for rack mounting or stacking and features a metal cabinet to minimize EM!.
1-8. OPTIONS
1-9. Th e options ava il able with the 5315A / 8 are described in Table 1-1. If an option is included
in the initial order , it will be installed at the factory and ready for operation upon receipt. If an
option is ordered for field installation, it w ill be supplied as a retrofit kit. For field installation of
Option 001 and 002 , refer to paragraph 2-29.
1-10. SPECIFICATIONS
1-1 1. Th e inst rument specifications are listed in Table 1-1. Thesespecifications are the perform-
ance standards
or limi ts aga in st which the instrument may be tested.
1 -1

Model 5315A/B
General
Information
Table 1- 1. 5315A / B Specifications
SPECIFICATIONS·
INPUT CHARACTERISTICS: (Ch ol nnel A itnd Chitnnel 8)
Ritnge: DC cou pled 0 to 100 M Hz
AC coupled
JO Hz to 100 MHz.
Sensitiyity: 10 mV rms si ne wave to 10 MHz.
25 mV rm s sine witve to 1 00 M H z. 75 mV peak-Io-peak
pul se al min imu m pul se w idth of 5 ns. Se nsitivity can be
varied continuously
up to 500 mV rm s NOMINAL by
adjus
ting sensitivity control. Insensitivity mode, trigger
level
is automati ca lly set to OV NOMINAL
Coupling: AC or DC, sw itchable.
Impedance: 1 Mn NOMINAL shunted by les sthan 40 pF
500 kn NOMINAL shunted by l ess than 70 pr
( COMMON A)
Signal Operitting Range: +2V to -2V
Attenuator: Xl or X20 NOMINAL
Trisser lev el : Var iable between +2V and -2V
Slope: Ind epend ent selec tion of + or - slo pe
Channel Input: SEPARA TE or COMM ON A
Damitge level:
AC&DC X 1:
DC
to 2.4 kHz
2.4 kHz to 100 kHz
> 100 kHz
AC&DC X 20:
DC to 28 kHz
28 kHz to 100 kHz
>1 00 kHz
SOOV (DC +AC ( rm sl)
6 X
10SV x Hz product (rms)
6V rms
SOOV (DC + PEAK AC)
1 X 107V X Hz product (rms)
l00V rms
FREQUENCY:
Rolnse: 0.1 Hz to 100 MHz
LSD Displityed: 10 Hz to 1 nHz de p ending upon gate time
and input sig na l. At l east 7 digits displayed per second
of gate time.
Resolution:
+ LSOt + , 4 X Trigser Err or X FREQ
- _. Cate Time
Accuracy:
± LSDt ± 1.4 X Trigger Error
Gate Time X
FR EQ ± ( lime b ase error ) x FR EQ
PERIOD:
Range: 10 ns
to lOS s
LSD Displolyed: 100 ns to 1 fs depending upon gate ti me
and
inp ut signal. At lea st 7 digits di sp la yed per second
of gate tim e.
Resolution:
+ LSD t + 1 4 X Trigger Error x PER
- _. Gale Time
AccurilCY:
± LSD t ± 1.4 X Trigser Error X PER ± ( time baM' erro r) x PER
Gate T ime
TIME INnR VAL:
Rolnse : 1 00 ns to l OS s
LSD Oisplilyed: 100 ns
Resolution: ± LS D ± Sta rt Trigger Error ± Stop Trigger
Error
AccuroilCY: ± LSD ± Start Trigger Err or ± Stop Trigger
Error ± (t
im e base e rr or ) X TI
TIME INnRVAL AV ER AGE:
1-2
Rolnse: 0 ns to l OS s
LSD DispLiyed: 100 ns to 10 ps depending upon gatetime
and
input signal.
Resolution:
:t LSD ± Stilr(
Tr igger ErrOl ± S top Trigger Error
,fN
,fN
Acc ur uy:
± LSD :t Star l Trigger Error ::!: SlOp Trigger Error
± ( time baM' error) x TI :t 4 ns
Number of intervals averaged (N ) = Gate Time x FR EQ
Minimum Dead Time (stop to stolrt): 200 ns
TIME INTER VAL HOLDOFF (De loil Y ):
Fronl panel gate time k nob inserts a variable de l ay of
NOMINALLY SOO ~s to 20 ms between START (Channel A)
and enabling
of STOP (Channel 5 ). Electrical in pu ts during
delay time are ignore d. Del ay t ime may be dig itally mea·
su r ed by simultan eo usly pre ss ing 1.1 . Averaging, T.I. Delay,
and blue key.
Other specifications of T. r. Hold off are identic al to Time
Interval.
RATIO:
Rilnge: 0.1 Hz
to 1 00 M H z, both channels
LSD:
2.5 )( Period A .
G T·
~x RatiO ( rounded 10 nearest decade)
ate Ime
Resolution:
:t 1 cou nt of A :t B Trigger E rror
Gale T ime
Acc ufu y: Same as resolution
TOTALIZ
E:
Manual:
Range: 0 to 100 MHz.
A Gated by B:
X Ratio
Totalizes input A between two eve nt s of B. Instrument
mu st be reset to make new measurement. Gate opens
on A slope, closes on B sl ope .
Range: 0
to 100 MHz
Resol ution : ± 1 co unt
Accuracy: ± 1 co unt ± B Trigger E rro r X Frequency A
TIME
BASE :
Frequenc
y: 10 M Hz:
Aging Roilte : <3 parts in 10 7/mo.
Temperature: <+ 5 parts in lOS, 0 to 50"C
Line Voltage: $± 1 part in 1 07 for ±1 0% variation
OPTIONS:
Option 001: High Stabili ty T ime Base ( TC XO)
Frequenc y: 10 MHz
Aging Rolte : <1 part in 107 / mo .
Temperolture: <1 part
in 1()6, 0° to 40°C
Line Vo ltase: <1 part in 1()8 for ± 1()';l(, vari at io n
Option 002: Sanery
Type: Rechargeable lead-acid (sealed)
Capaci
ty: TYPICALLY 4 hours of co ntin ous operation
oilt 25 °C
Rec::hilrging nme: TYPICALLY 16 ho urs to 98 % of full
charge, instrument nonopera
tin g. Charging circuitry
includ ed with Option. Batteries not charged during
ins tr ument operation.

Mode l 5315A/B
General Info rmation
Table 1- 1. 5315A/B Specifications ( Continued )
Low Voltage Indicator: Instr ument turns itself off
automatica
ll y when low batlery conditions exists.
Discharge
LED fl ash es slowly when this happens .
Discharge
LE D is on wheneve r battery is supp l y-
ing powe r to inst rument .
Charge L
ED indicates state of charge of battery
and
is on whe never battery is charged to 95 %
NOMINAL of capa ci ty. Charge LE D flashes when
90% NOMINAL of charge taken out is replaced.
Charge
LED is off if charge is less than 90%
NOMINAL capacity.
Line Failure Protection: Instr
ume nt automatically
switches to battery in case of line failure.
Weight:
Option 002 adds 1 .4 kg (3 Ibs. ) to weight of
instr
ume n t.
53158: Rack and stack metal case; AC line power onl y.
Speci fi cations same as 5315A except as fo ll ows:
Rack
Mount: 53 158 is recommended for rack moun t-
ing vi a Rack Mount Kit 5061-0072
Oscillator Output: 10 MHz, 50 mV pop into son load
External Frequency Standard: 10 MHz, lV rms into
soo n
Dimensions: 215mmwidex81 mmhighX279mmiong
( 6~ x 31;8 x 107/S in.)
Weight: 4
kg (8.8 Ibs.)
GENERAL:
Check: Counts internal 10 MHz reference frequ ency
over gate ti me range NOMINALLY 500 p's to 20 ms .
Error Light: LED warning li
ght activated if logic e rr or is
f ound dur ing instrument turn - on self-check.
Display: 8-digit
amber LED display, with engineering
units annunciator.
01ierflow: On ly frequency and to ta lize me asurements
wil loverfl ow . In case of overfl ow, eight least sign if icant
digits wi
ll be displayed and amber fr on t panel ove rflow
L
ED w ill be actuated. All other me asur ements which
would theoretica ll y cause a display of more than 8
digits wi
ll resu lt in the display of the 8 most significant
di gits.
Gate Time:
Cont inuously variable, NOMINALLY from
50 ms to 10 s or 1 period of the in put , whichever is
l onge r.
Sample Rate: Up to 5 readings per seond NOMINAL ex-
c ept in time i nte r va l m ode, where it is cont in uously
variable
NOMINALLY from 250 ms to 10 s v ia Gate
Time
co ntro l.
Operating Temperature : 0° to SOoC
Power Requirements: 100,11 5,2 10, or nov ( +5 %, -10 %)
48-66 H z; 10 VA maximum.
Weight: 2.9
kg (6 Ib s. 5 oz.)
Dimendnn!;: 238 mm winE> x qg high x 27n mm long
( 9~ X 37 /s X 107/8 in.)
DEFINITIONS:
Resolution: Smallest discernible
change of measurement
result due to a m in imum chan ge in the inpu t.
Accuracy: Deviation from the actual v al ue as fi xed by
un iversa ll y accepte d standards of fr equenc y and time.
Least Signincant Digit
(LSD ) Displayed:
Frequency:
2.S X 10-7
Gate T ime
2.5
Ga~e T ime
Period:
2.5 x 10-7
Gate Ti me
2.5
Gate Time
x FREQ FREQ <1 0 MHz
F REQ ;::: 10 MHz
x PER PER
>100 ns
X PER 2
PE R !:O l00 ns
All above calcul at ions should be rounded to nearest
decade (i.e., 0.5 Hz will b eco me 1 Hz and 0.4 ns will be
0. 1 05).
Time Inlerval Average:
1 to 25 intervals .. .... . .. .
25 to 2500 in tervals ............ .
2500 to 250,000 ....... .. ........ .
250,000 to 25,000,000 intervals . ... . .. .
25 ,000,000 interv al s . . .... . ... . . ... . .. .
LSD
100 ns
10 ns
1 n,
100 ps
10 ps
Time Inter
val Average is a statistical process. L SD dis-
p la yed is ca lc ul ate d for 1 standard deviati on (0 ) con-
fi dence leve l.
Tr i gger Error:
__
--c= c.c ~y<~ ( 80~"~V~ I ~2~+~ ,~"~c= c:
Input sle w rate at trigger point ( rms l
where en is the rms no ise of t he in put f or a 100 MHz
ban
dw id th.
t
Du e to arith me ti c truncati on,q uantization erro r will be
±1 or ±2 counts of the LSD as fo ll ows:
± 2 counts 01 L SD if
± 2counts of L SD if
LSD
1 X1 (}- 7 FR EQ <10 MHz
FR
EQ or PER
LSD > lI(Gate T ime)
FREQ or PER fREQ
F REQ ;:::10 MHz
± 1 count of LSD for all other cases .
1-3

Model 5315A/B
General Information
1-4
1-12. SAFETY CONSIDERATIONS
1-13. Th e 53 1 5A / 5315B Universal Counters are Safety Class I instruments, designed according
to international safety standard
s. Thi s operating and service manual contains in formation,
cautions, and warn in gs which mu st be fol lowed by the user to ensure safe operation and keep
the instrum ent in sa fe condition.
1-14. INSTRUMENT IDENTIFICATION
1-1 5. Hewlett -P ackard in stru ments have a 2-secti on, 10- character serial number ( OOOOAOOOOO ),
which is located
on the rear pane l. The four-d igit serial prefix id entifies instrument changes. If
the se rial prefix of y our instrument differs from that listed on the title page of this manual, there
are differences between th
is manual and your instrument. In struments having hi ghe r se ria l
prefixes are covered with a
"M anual Changes" sheet included with this manual. If the chan ge
sheet is mi ss in g, contact the nearest Hewleu -P ackard Sales and Service Office listed at the back of
t
hi s manual. Ins truments ha v in g a lo wer serialprefix than that lis ted on the title page,are covered
in Section VI
I.
1-16. ACCESSORIES
1-1 7. Table 1-2 lists accessory equipment supplied and Table 1-3 lists accessories ava il able.
Table 1 2 Accessories Supplied
-
De§cription Part No,
Detachable
Po wer Cord, 8120-1378
229 cm ( 71;2 feet)
Table 1 3 Accessories Available
-
De§cription HP Part Number
Rack Mount Kit ( 5315B Only) 5061-0072
1-18. RECOMMENDED TEST EQUIPMENT
1-19. Th e test eq uipment listed in Table 1-4 is recommended for use dur ing performance tests,
adjustments, a nd t roub leshoot in g. Substitutetest equipment may be used if it meets the required
characteristics
li sted in the tab le .
Table 1 4 Recommended Test Equipment
-
Instrument
Critin] Specifications
Recommended
·U ..
Model
Oscil los co pe
100 MHz Bandwidth HP 1740A P,A,T
Function Generator 0. 1 -10 MHz
HP 33 1 2A
P ,T
Signal Generator 10- 100 MHz HP 8 654 A P
DC Voltmet er 20 V Range, O.OSV Re~olution HP 3465A A, T
Logic Pu lse r TTL , Pulse Streams
HP 546A
T
SO O F eedthrough BNC Type P,A,T
Tee Co nne ctor
BNC Type
12 50 -0 781 P,A,T
Cables (3) 4 B
NC son 11170C
P,A,T
.
P - Performance T es t s, A - Adjustments, T - Tr oubleshoottng .

Model 5315A / B
Installation
2-1 . INTRODUCTION
SECTION II
INSTALLATION
2- 2. This section co ntains information for unpacking, inspection, storage, and in stallation.
2-3. UNPACKING AND INSPECTION
2-4. If the shipping carton is damaged, inspect the instrument for visible damage (scratches,
dents, etc.).
If the in strument is damag ed, noti fy the carrier and the nearest Hewl ett -Packard
Sales and Servi ce Office im mediately (offices are li sted at t he back of this manual.) Keep the
s hi pping carton and packing material for the carrier's inspection. Th e Hewlett-Packard Sa les and
Se rvice Office wi ll arrange for repair or replac emen t of your instrument without wa it in g fo r the
cla
im against the carrier to be settled.
2-5. PREPARATION FOR USE
2-6. Power Requirements
2-
7. The HP 53 1 5A / Brequires a power sour ce of100-, 115-. 210 -, or 230 -volt ac,+5%.-10%,48 to
66 Hz s in gle phase. Power consumption is app roxi ma tely12 wa tts.The 5315A (o nl y) may also be
power ed by the Op ti on 002 BatteryPack. See Secti on I,Specificationsand Secti on VIII, pa ra graph
8-60,
fo r description.
2-8. Line Volt
.. ge Selection
CAUTION
Before connecting the instrument to ac power lines. be sure that
the wolt .. ge selector is properly positioned as described below.
2-9. Th e 5315A is preset at the factory to one of four line voltage selection s. Refer to the rear
panel label (see Figure
2-1 ) to determ ine which of the fo llo wing sett in gs is preselected:
Option 100:
Option 115 :
Option 210:
Option 230:
86- to l 06- volt ac li ne
104- to 127 -volt ac line
190- to 233-volt ac line
206- to 2S0 -volt as line
YOI.TAC! SEIlIIol,. OI'TlON'
Figure 2-1. 5315A Line Vo/lage 5eleclion
_ .. ',,.,
_ .. -.
2-1

Model 5315A/B
Installation
2 -2
2-10. Changing the 5315A power lin e vo ltage selector requires the cab in et to be opened.
Instructions for changing the line voltage setting are given in Section V.
2-11. T he 531S8 is eq uipp ed with a power module that contains a printed- circuit line voltage
se lector to select100-,120-, 220- , or 240-volt acoperati on ( see Figure2-2 ). Beforeappl yi ng pow er,
the
pc se l ector must be set to the correct position and the correct fu se must be installed as
de sc ribed below .
PC Rn ... Rn . ... RT IfUMRf A'~
HI' !.alD 8111
SElEcnO If Of Of'{R""IIfG Val ''''CE
Sol .. , 01>0< "'"'1 ... 1 1. b~ 0""""" PC boord
'0 po •• ,.an d nootd .011.,.." ' op!t ll "",
Pu,h bo .. d I ~mlw ,n l. modu l, I1.r
1 Ao,,,. to", U"II blc' .n'a "0' .... '110 •• '.0"
I nd" ,nw ' I ..... n ~"' ... . "~"'I Uu" .... 'a
",I . c' ,..,... t ..... 1''''
Figure 2-2. 53158 Line Voltage Selection
2-12. Power line connnections are selected by the position of the plug -;n circuit card in the
module. When the card is plugged into the modu le, the onl y visible markings on the ca rd indi-
cate the line vo ltage to be u se d. The correct va lue of line fuse, wit h a 2S0 -volt rating, mu st be
in st al led after the card is inserted. This in str ument uses a 0.25A fuse (HP Part No . 2110-0201 ) for
l00 /120- volt operat ion ; a 0 .1 2A fuse (HP Part No. 2110-0318) for 220/240-v olt operation.
2-13. To conv
ert from one line voltage to another, the power cord must be di sconnected from
the power modul e before the slid in g w in dow co ve ring the fuse and card c ompartmen t can be
mo ved to expose the fuse and circuit card.
2-14. Pull
on the fu se lever to remo ve the fuse and then pull the ca rd out of the module. Th e
fuse lever must be held
to one side to extract and insert the card. I merl the ca rd so the marking
that agrees wit h the line vo ltage to be used is vi si bl e.
2-15. Return fu se lever to normal position , insert correct fuse, sl id e plastic win do w over the
compartment , and connect the power cord to comp lete the conver si on .

Model 5315A/ B
Installation
2-16. Power Cable
WARNING
BEFORE SWITCHING ON THIS INSTRUMENT,THE PROTECTIVE
EARTH TERMINALS OF THIS INSTRUMENT MUST BE CONNEC-
TED TO THE PROTECTIVE CONDUCTOR OF THE (MAINS)
POWER
CORD . THE MAINS PLUG SHALL ONLY BE INSERTED IN
A SOCKET OUTLET PROVIDED WITH A PROTECTIVE EARTH
CONTACT. THE PROTECTIVE ACTION MUST NOT BE NE-
GATED BY THE USE OF AN EXTENSION CORD (POWER CABLE)
WITHOUT A PROTECTIVE CONDUCTOR (GROUNDING).
2- 1 7. The 5315A/ B isshi pped with a three-wire pow ercable. When the ca bl e is conneded toan
appropriate ac po we r source, thiscable co nnects the chassis to earth ground. The type of power
cable plug s hi pped with each in st r ume nt depends on the count ry of destination. Refer to Fig-
ure 2-3 for the part numbers of the power cable and plug conf igurations available.
2-18. Operating Environment
2-19. TEMPERATURE. The 5315A/ B may be operated in temperatur es from O°C to 50 °C,
2-20. HUMID I TY. The 5315A/B may be operated in environments with humidity up to 95%.
However , it should be protected from temperature extremes wh ich cau se condensation in the
instrument.
2-21. ALTITUDE. The 5315A/ B may
be operated at altitudes up to 4,600 metres (1 5,000 feet).
~
,
~ .
,
" l1). un
. , l1). , )41
Figure 2-3. Power Cabl e HP Parr Num ber s versus Mains Plug5 Available
2·3

Model 5315A/ B
Installation
2 ·4
2-22. STORAGE AND SHIPMENT
2~23. Environment
2-24. The instrum en t may be stored or s hipped in envir onments wi th the following limits:
T
empe rature ............................ -40°C to +75°C
Humidity
.... _. . ...... _. . . . . . . . . . . . . . . . . . . . . . Up to 95 %
Altitude _. _ ... __ . _. _ ..... ...... _ 7,620 metres (25,000 feet)
2-25. The instr
ument sh ould also be pr otected from tempera t ure extremes which cause con-
densation within the instrum ent.
2~26 . Packaging
2~27. ORIGINAL PACKAG ING. Conta iners and materials identical to those used in factory
pac kaging are available through Hewlett-Packard offices. If the in st rum ent is being returned to
Hewlett-Packard for servicing, attacha tag i nd icating the type of service required, return address,
model nu mber, and fu ll serial number . Also, mark the containe r FRAGILE to ensure careful
handling.
In any correspondence, refer to the ins trumen t by model number a nd full serial
number.
2-28. O THE R PACKAG I NG . The following general instruction should be used for repacking
with commercially available mate
ri als:
a. Wrap instrument in heavy paper or plastic. ( If s hi pping to Hewlett -P ackard office or
service center , attach a tag indicating type of service required, r et urn address, model
number , and fu ll serial number .)
b. Use str
ong shipping container. A double-wall carton made of 350-pound test material is
adequate .
c. Use a layer
of shock-absorbing material 70 to 1 00 mm ( 3- to 4- inch)thick around all sides
of the in st rum ent to provi de firm cushio ning and prevent movement inside co ntainer.
Protect control panel with
ca rdb oard.
d. Seal shipping
container securely.
e. Mark shipping container F
RAGILE to ensure careful hand li ng.
f.
In any corresponde n ce, refer to i nstrument by mode l number and full serial number.

Model 5315A/B
Installation
2-29. FIELD INSTALLATION OF OPTIONS
2-30. The fo ll owing tables provide instructional procedure s fo r field installati on of Options 001
and 002.
Table 2-1 Option 001 I n51;)lIal;on
OPTION 001, A7 TC XO ASSEMBLY
Parts required:
(11 A7 TCXO Assembl y, OS317-60007
(2) %2 X ¥S Pan HD Pozi Sc rew, 236O--{)19 7
(2) %2 x V. Hex Nut, 2500-0001
(2) No.6 lockwasher, 2190-0008
Non
Installalion of Options should be performed by qu alified service
personnel only.
1. Remove the AC power cord.
2. Remove the instrument top cover. For Model 5315A , Ihis requires removal of the four screws
accessible from cabinet bott om . F or Model 5315B, loosen the single screw on the top ce nter of
the rear panel.
3. In sert the A7 TCXO assembl y, wit h compone nts fa cing to the outs id e of the instrument, i nlo 11
of the A1 Motherboard assembly.
4. Secure the assembly by insta lli ng the two pozidrive screws, through l-brackets on A7, to the
Motherboard.
5. Slide t he motherboard INT / E XT switch 53, to the EXT pOSition (toward rear of inSifumenl).
6. Replace the top cover. This completes the installation of Option 001.
Table 2-2 Option 002 I ns tallati on
OPTION 002, BATIERY PACK WITH A6 CH ARGER ASSEMBLY
Parts required:
(1 ) Battery Pa ck Retrofit Kit , 053 1 5--60 1 05
NOTE
Option 002 may be in stall ed only in Model 53 1 SA. Installationshould be
performed by qua li fied service personnel only.
1. Remove the AC power cord.
2. Remove the ins trum ent top cover by removing the four screws accessible from the cabinet
bottom .
3. Po sition the bracket assembly, with A6 and BTl insta ll ed, onto the six mounting posts on the
inside top cover, placing the charger toward the front and the battery toward the rear of the
instrument. Secure with six press- on retainers supplied.
4. Conne ct J1 of the A6 Charger assemby 14 to the Al Motherbo ard as sembly using cable
harness supplied
NOTE
Co nnecto rs on this harness are polarized; do not force the connecto r.
5. Repla ce the top cover. Th is completes the installation of Option 002.
2·5

Mode l 5315A/ B
O peration
3-1. INTRODUCTION
SECTION III
OPERATION
3-2. This se cti on provides operating i nformation fo r the 53 15 A/ B Un iver sa l Counter. Descrip-
tions of all front panel control s, connedors, and ind icators as we ll as an operator's check, oper-
at ing in structions, a nd operator's ma in te na nce are prov ided.
3-3. OPERATING CHARACTERISTICS
3-4. The 5315A/B isa 100 MH z/ 100 ns full universal counter,capable of Frequency, Period, Tim e
Interval, Ratio, a nd Totalize type mea su remen ts. To maxim i ze resol ution, the 5315A/ 8 uses a
recipr
oc al counting techn iqu e for frequencies be l ow 10 M Hz, automatically sw i tc hin g to co n-
ve ntional frequenc y cou nting fo r fr eque nci es a bo ve 10 M Hz. The gate t im e is co n tinuous ly
adju
sta ble fr om 50 ms to 10 s, via th efr ont panel.The internal mic ro compute r performs the calcu-
lation
s, and au tomatic ally compensates f or the arb itr ary gate time. The display is given in en gi -
neering notati on (Le., exponents of blank 0, ±3, ±6, or ±9 ). The in put amplifiers are optimized
for both t im e i nte rval and frequency mea su remen ts. The fo ll owing paragraphs desc ribe t he
powe r-up char ac teristics and operating modes of the 5315 A/ B.
3-5. POWER-UP SELF CHECK
3-6. When the 5315 A/B is turned on , a po wer -up reset and se lf- check cycle is au tomatic ally
i ni tiated. This is approximately a 2-second cycle, indicated by th e fo ll ow in g display:
OV FL
Hz
5
GATE
3 -7 . Dur ing this cycle, th e mic rocomp uter perform s a check su m of the int ernal program in
ROM and a bi t pattern is written i nto and read f rom RAM. Addit ionally, a partial check of the
M RC a nd 1/0 ports isper formed . Any failure during the cycle w ill prod u ce a number ed error
message, momentarily d is pla ye d, and will la tch the ERROR a nnun icator ON . Refer to Error
M
es sages, paragraph 3 -5 2.
3-8. MODES OF OPERATION
3 -9. The 5315A/B pro vides eig ht mode s of operation and two check func tion s.The reso luti on
and accuracy for each mode is prov id ed in Table 1-1 . The modes of operation are desc rib ed in
the followi ng pa r ag raphs as fo llows:
A. FREQ A
B. PER A
C. T. I. A- B
D. T.I. AV G. A -B
E. T.I. DELAY (H oldoff )
F. RA TI O Al B
G.
H.
I.
J.
A BY B (Gated Totali ze )
TOT (
Man u al Totalize)
C HE CK
Di sp la y Check
3-1

Mo del 53 1 5A / B
Operat i on
3-2
3-10. FREQ A
3 -11 . Fre quenc y measurements are made by connect ing a signal ( up to 1 00 MHz ) to INPUT A,
and pressing
the FREQ A function key (with the Blue sh ift key ou t). Select the appropriate inp ut
signal condi tion ing and adjust the LEVEl/SENScont rol (with TRI GGER LEVEl/SENSIT IV ITYkey to
TRIGGER L EVE L) to opt i mum trigger point. The opt i mum trigger poi nt may be deter min ed by
centering the LE V El /S ENS cont rol within the triggering range, indicated by the flashing trigger
light. The
GA TE TI M E con trol determin es the resolut ion of the measurem ent, and may be
displayed by p
ress ing the GATE TI ME func ti on key and Bl ue shift key.
3-12.
PER A
3 -1 3. The P er i od A mode allows si n gle per io d measurements to be made w it h periods of 105s
to 10.0 nanoseconds in
to IN PUT A. Select the approp riate input signal condit i on ing, and Trigger
level/Sensi
tiv ity.
3-14. T.
1. A-B
3-15. T.I. A-B measures the time inter val be tw een a STA RT signal at INPUT Aa nd a STO Psignal
at INPUT B. If b ot h the START and STOP signalsare derived from the same sig nal, connect the
sig n al to INPUT A and set the SEP/COM A key to the COM A position (IN). Separate slope and
level/Sensitivity controls
for each channel all ow variable triggering on eit her positive or
negative going slope. A single-shot ti
me interval measurement may be made over a range of
100 ns up to 8 digits and 105 s after 9 digits.
3-16. T.I. AVG
A-B
3 -1 7. Th e T.I. Average mode pro vides greater resol ut ion of ti me interval m eas urement sthan
s
in gle-s hot T.I. mo de prov ides. In the T.I. AVG mode, the gate t ime control varies the numb er of
even ts of time in ter va lsaveraged (ap pro x im ately GA TE TI ME X REP R ATE ). The resol ut i on of the
measurement is improved by the IN , where N is the number of time intervals averaged.
A
lim ited range of negati ve T.I. measurements (Le., B triggers befo re A) are possi ble
in T.I. AVe mode.
3-18. In the T .1. Ave mode, there mu st be at least 2 00 ns de ad tim e. Dead ti me is th e ti me
between the pr eceding time interval stop event and the current time interval sta rt eve nt , as
shown in Figure 3 -1 . This means that in T. 1. AVG mode, t he repeti tion rate must be l ess than
5 M H z.
A - SLOPE
B + SLOPE
START
,
,
,
,
,
,
S TOP START
STO P
: T.1. MEASU RE D
OEAOTIME >200 ns
Figure 3-1. n. Average Dead Time