HP 5308A Service manual

OPERATING AND SERVICE MANUAL
15 MHz
TIMER/COUNTER
5308A
ET PACKARD

CERTIFICATION
Hewlett-Packard Company certifies that this instrument met its published specifications
at the time of shipment from the factory. Hewlett-Packard Company further certifies that
its calibration measurements are traceable to the United States National Bureau of
Standards, to the extent allowed by the Bureau's calibration facility, and to the calibration
facilities of other International Standards Organization members.
WARRANTY AND ASSISTANCE
This Hewlett-Packard product is warranted against defects in materials and workmanship
for a period of one year from the date of shipment. Hewlett-Packard will, at its option,
repair or replace products which prove to be defective during the warranty period pro-
vided they are returned to Hewlett-Packard, and provided the preventive maintenance
procedures in this manual are followed. Repairs necessitated by misuse of the product
are not covered by this warranty. NO OTHER WARRANTIES ARE EXPRESSED OR
IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. HEWLETT-
PACKARD IS NOT LIABLE FOR CONSEQUENTIAL DAMAGES.
if this product is sold as part of a Hewlett-Packard integrated instrument system, the
above warranty shall not be applicable, and this product shall be covered only by the
system warranty.
Service contracts or customer assistance agreements are available for Hewlett-Packard
products.
For any assistance, contact your nearest Hewlett-Packard Sales and Service Office.
Addresses are provided at the back of this manual.
019000-4-234

SECTION IX H
73 MHz TIMER/COUNTER
5308A
OPERATING AND SERVICE MANUAL
SERIAL PREFIX: 1528A
This section applies directly to Model 5308A 75 MHz
Timer/Counters having Serial Prefix 1528A. The sec-
tion is provided in loose-ieaf form for incorporation
into the 5300B Measuring System Manual.
NEWER INSTRUMENTS
This section with enclosed “Manual Changes” sheet
applies directly to HP Model 5308A 75 MHz Timer/
Counters having Serial Prefix numbers above 1528A.
OLDER INSTRUMENTS
Subsection VII of this document contains information
pertinent to all older instruments with Serial Prefix
1440A or 1524A.
Copyright HEWLETT-PACKARD COMPANY 1975
5301 STEVENS CREEK BLVD., SANTA CLARA, CALIF. 95050
Printed: JAN 1976
MANUAL PART NO. 05308-90005
MICROFICHE PART NO. 05308-90006
PRINTED IN U.S.A.
HEWLETT ’ PACKARD

Model 5308A
General Information
SECTION IX H
5308A 75 MHz TIMER/COUNTER
SUBSECTION |
GENERAL INFORMATION
9H-1-1. PURPOSE AND USE OF SECTION IX H
9H-1-2. Section IX H contains the information neces-
sary to install, operate, and maintain the HP 53084.
Timer/Counter. Theory of operation, parts lists, com-
ponent locator illustrations, and a schematic diagram
are included. Insert this document in the HP 5300B
Measuring System manual as part of Section IX.
9H-1-3. INSTRUMENT DESCRIPTION
9H-1-4. When plugged onto a 5300B mainframe, the
5308A can measure frequency, frequency ratio,
period, period average, time interval, and time interval
average. A single-channel or a two-channel totalize
function is provided. The two-channel function
totalizes pulses on Channel A during pulses on Chan-
nel B or between pulses on Channel B.
9H-1-5. Front panel controls are provided for func-
tion and time base selection and for signal condition-
ing (slope, level, and attenuation). Automatic
selection of maximum resolution is provided for the
four functions of frequency, frequency ratio, period
average, and time interval average measurements.
Trigger indicator lamps are provided to indicate when
internal amplifier triggering occurs.
9H-1-6. Rear panel connectors provide a gate
output for Z axis modulation of an oscilloscope, trig-
ger level outputs for monitoring the voltage level at
which each channel triggers, and a time base cutput
for use in totalizing, period, and time interval
measurements.
9H-1-7. The electrical and mechanical specifications
are listed in Table 9H-1-1.
9H-1-8. INSTRUMENT IDENTIFICATION
9H-1-9. Hewlett-Packard uses a two-section, nine-
digit serial number (0000A00000) mounted on the
rear panel to identify the instrument. The first four
digits are the serial prefix and the last five digits refer
to the specific instrument. If the serial prefix on your
instrument differs from that listed on the title page
of this section, there are differences between the
manual and your instrument. Lower serial prefixes
are covered by a manual change sheet included with
the manual.
Figure 9H-1--1. 5308A 75 MHz Timer/Counter
9H-1-1

Model 5308A
General Information
9H-1-10. The printed circuit board within the instru-
ment is identified by a two-section, 10-digit part
number (e.g., 05308-60001) and a four-digit series
number (e.g., “SERIES 1440A”). The series number
identifies the electrical characteristics of the com-
plete printed-circuit assembly. A replacement circuit-
board assembly may have a different series number
than the assembly originally supplied with the instru-
ment. Therefore, when troubleshooting a circuit-
board assembly, ensure that the series number on the
schematic diagram matches the series number on the
board assembly. If the series number on the assembly
is lower than the number on the schematic diagram in
Subsection VIII, refer to Subsection VII of this docu-
ment for change information. If the series number on
the assembly is higher than the number on the sche-
9H-1-2
matic diagram in Subsection VIII, the change infor-
mation
is
provided
in
a
manual
change
sheet
which
is.
`
available from the nearest Hewlett-Packard Sales
and Service Office,
9H-1-11. Manual Changes and Options
9H-1-12. The title page lists the serial prefix number
to which this manual directly applies. If the serial
prefix is different from the one listed, a change sheet
is included describing the required changes. If this
change sheet is missing, the information can be sup-
plied by any Hewlett-Packard Sales and Service office
listed in Section VIII of the 5300B Measuring System
manual. Options are listed in Section IX H, Sub-
section VII.

Model 5308A
General information
Table 9H-1-1. Specifications
INPUT CHANNELS A AND B
RANGE: DC Coupled; 0 to 75 MHz
AC Coupled; 20 Hz to 75 MHz
SENSITIVITY: (Min) 25 mV rms sine wave to 10
MHz. 50 mV rms sine wave to 75 MHz. 150
mV p-p pulse at minimum pulse width of 10
ns. Input must be less than 1V rms from 50 to
75 MHz with Attenuator switch in X1 position.
Sensitivity can be decreased by 10 using
Attenuator switch.
IMPEDANCE: 1 MO shunted by less than 48 pF.
OVERLOAD PROTECTION: +
DC Range:
Xl: DC to 400 kHz 125V rms
400 kHz to 5 MHz Vrms = (5x107)+(Hz)
5 MHz to 75 MHz 10V rms
X10: DC to 4 MHz 250V rms
4 MHz to 75 MHz Vrms = (1x10°)+(Hz)
| AC Ranges:
DC to 10 Hz 200V peak in addition to
above ratings.
TRIGGER LEVEL: Set position centers triggering at
O volts, or continuously variable over the
range of 22.0 V with Attenuator in X1 position
or +20V with Attenuator in X10 position. Trig-
ger level available on rear panel BNC con-
nectors for DVM monitoring.
SLOPE: Independent selection of triggering on
positive or negative slope.
CHANNEL INPUTS: Separate or Common B
GATE OUTPUT: Rear panel BNC. TTL low level
while gate is open may be used to intensity
modulate an HP oscilloscope.
TIME BASE/SCALING OUTPUT: Available at rear
panel BNC.
FREQUENCY
RANGE: 0 to 75 MHz, Channel A or Channel B.
GATE TIMES: 8 manually selectable times from 1
us to 10 seconds. AUTO position selects gate
time for maximum resolution within a 1.1
second measurement time.
ACCURACY: +1 count + time base accuracy.
DISPLAY: Hz, kHz, and MHz with positioned deci-
mal point.
FREQUENCY RATIO
DISPLAY: Fa/Fb, measured over N periods of Fb.
N=1 to 10%, selectable in decade steps with
automatic decimal position and annunciators.
AUTO position selects N automatically for
maximum resolution within a 1.1 second
measurement time.
RANGE: Channel A; 0 to 75 MHz. Channel B; 0 to
5 MHz.
ACCURACY: +1 count of Fa + trigger error of Fb*. `
PERIOD
RANGE: 0 Hz to 5 MHz, Channel B-
RESOLUTION: 100 ns to 10 s in decade steps.
ACCURACY: +1 count + time base accuracy + trig-
ger error*.
DISPLAY: us, ors with positioned decimal point.
PERIOD AVERAGE
RANGE: 0 to 5 MHz; (100 ns to 10 s), Channel B.
PERIODS AVERAGED: 1 to 10% manually selectable
in decade steps. AUTO position automati-
cally selects number of periods for maximum
resolution within a 1.1 second measurement
time.
FREQUENCY COUNTED: 10 MHz.
ACCURACY: +1 count + time base accuracy + trig-
ger error*,
DISPLAY: mus (ns), us, with positioned decimal
points. (In the 108 position of the TIME BASE
switch, the display will be ps with no
annunciator shown.)
TIME INTERVAL
RANGE: 200 ns to 10° s. 25 ms minimum pulse
width. Separate or Common B.
RESOLUTION: 100 ns to 10 s in decade steps.
ACCURACY: +1 count-+ time base accuracy + trig-
ger error’,
DISPLAY: us, s, or ks with positioned decimal point.
TIME INTERVAL AVERAGE
RANGE: 1 ns to 10 s. 200 ns dead time between
intervals. Channels A and B separate or Com-
mon B.
INTERVALS AVERAGED: 1 to 108 selectable in de-
cade steps. AUTO position selects number
of intervals to give maximum resolution with-
in a measurement time of 1.1 second.
DISPLAY: mus (ns), us, or s with positioned deci-
mal point. (In the 108 position of the TIME
BASE switch, the display will be in ps with
no annunciator shown.)
ACCURACY: + time base accuracy £5 ns
+ [Trigger Error* + 100 ns]
Y Intervals Averaged
TOTALIZE
Totalizes Channel A during pulses on Channel B.
Totalizes Channel A between pulses on Channel B.
RANGE: 75 MHz on Channel A in position 1 of
TIME BASE switch, 5 MHz in other
positions of TIME BASE switch.
ACCURACY: +1 count + trigger error on Channel B*.
DISPLAY: Displays count. Can scale display with
annunciator by use of TIME BASE switch to
increase count capacity.
GENERAL
NOTE: 5308A is compatible with 8 digit 5300B
mainframe only.
CHECK: Inserts internal 10 MHz reference fre-
quency into counting decades. Displays 10
counts for TIME BASE switch positions 10
through 108 with proper decimal position and
annunciator.
OPERATING TEMPERATURE: 0° to 50°C.
POWER REQUIREMENTS: Including 5300B main-
frame, nominally 15 watts.
WEIGHT: Net, 0.9 kg (2 Ib). Shipping, 1.5 kg (3% Ib),
DIMENSIONS: With mainframe 89 mm H 3%”) x
760 mm W (6547) x 248 mm L (9%”).
+SEE WARNING ON PAGE 9H-3-11.
*For any waveshape, trigger error (us) is less than +
0.005
For period average, this is less than +0.3% of one
period + periods averaged for signals with 40 dB or
better signal-to-noise ratio.
9H-1-3

TEE

Model 5308A
Installation
SECTION IX H
5308A 75 MHz TIMER/COUNTER
SUBSECTION Il
INSTALLATION
9H-2-1. INTRODUCTION
9H-2-2. This section contains information on unpack-
ing and inspection, storage and shipment, installation
and removal of plug-on, and portable operation.
9H-2-3. UNPACKING AND INSPECTION
9H-2-4. If the shipping carton is damaged, ask that
the carrier’s agent be present when the instrument is
unpacked. Inpsect the instrument for damage such as
scratches, dents, broken knobs, etc. If the instrument
is damaged or fails to meet performance tests when
used with the 5300B mainframe, notify the carrier
and the nearest Hewlett-Packard Sales and Service
Office immediately. Performance check procedures
are located in Subsection V, and Sales and Service
Offices are listed in Section VI of the 5300B portion of
the manual. Retain the shipping carton and the pad-
ding material for the carrier’s inspection. The Sales
and Service Office will arrange for the repair or re-
placement of the instrument without waiting for the
claim against the carrier to be settled.
9H-2-5. STORAGE AND SHIPMENT
9H-2-6. PACKAGING. To protect valuable elec-
tronic equipment during storage or shipment, always
use the best packaging methods available. Your
Hewlett-Packard Sales and Service Office can pro-
vide packaging material such as that used for original
factory packaging. Contract packaging companies
in many cities can provide dependable custom pack-
aging on short notice. The unit was originally pack-
aged as follows:
The original container is a corrugated cardboard
box with 200 Ibs. burst test (HP 9211-1620). The
instrument is secured and protected in the box by
a top and bottom molded frame of polystyrene
foam (HP No. 9220-1545).
9H-2-7, ENVIRONMENT. Conditions during stor-
age and shipment should normally be limited as
follows:
a. Maximum altitude: 25,000 feet.
b. Minimum temperature: -40°F (-40°C).
c. Maximum temperature: +167°F (+75°C).
9H-2-8. INSTALLATION AND REMOVAL OF
PLUG-ON
9H-2-9. The counter must be used with a 5300B main-
frame to make measurements. Mate the counter and
the mainframe according to the instructions given in
Paragraph 2-11 and Figure 2-1 in the 5300B main-
frame documentation.
9H-2-10. PORTABLE OPERATION
9H-2-11. Use of the HP Model 5310A Battery Pack
enables the 5300B mainframe and the counter to be
used in areas removed from ac power sources. The
battery pack provides a minimum of 3 hours oper-
ation (typically 5 hours) at 20° to 30°C operating and
charging temperature. Tables 1-2 and 1-4 of the
5300B portion of the manual lists the battery pack as
an available accessory. Documentation for the
battery pack is also included in Section IV through
VIII of the 5300B portion of the manual. To prepare
the 5300B/5308A for portable operation, refer to
Paragraph 2-13 and Figure 2-2, of the 5300B portion
of the manual.
9H-2-1

ere
EEEREN
NAON
e
reee,
‘20400938903 tees
green

Model 5308A
Operation
SECTION IX H
5308A 75 MHz TIMER/COUNTER
SUBSECTION Ili
OPERATION
9H-3-1. INTRODUCTION
9H-3-2.
This
section
provides
operating
information
and
describes
modes
of
operation
and
operating
proce-
dures.
The
5308A
plug-on
may
be
used
to
measure
frequency
or
frequency
ratio
up
to
75
MHz,
period
to
5
MHz,
period
average
to
5
MHz,
time
interval
from
200
nanoseconds
to
10
seconds
and
time
interval
aver-
age
from
1
nanosecond
to
10°
seconds.
Signals
up
to
75
MHz
may
be
totalized
on
Channel
A
in
the
single-
channel
totalize
function.
In
the
two-channel
totalize
function,
signals
up
to
75
MHz
may
be
totalized
on
Channel
A
during
pulses
on
Channel
B
or
between
pulses
on
Channel
B.
9H-3-3. OPERATING INFORMATION
9H-3-4, The front panel contains a FUNCTION selec-
tor,
a
TIME
BASE
selector
and
signal
conditioning
controls
for
use
with
the
Channel
A
and
Channel
B
input connectors. The signal conditioning controls
are
labeled
LEVEL
A
and
LEVEL
B,
ATTENUATORS
and AC-DC. An O/C (open/close) switch is provided
for Channel B and a SEP-CHK-COM B switch is pro-
vided for selecting channel inputs and self check func-
tion.
The
purpose
and
use
of
these
controls
is
described
in the following paragraphs.
9H-3-5. Function Selector
9H-3-6.
The
FUNCTION
selector
selects
one
of
the
eight
operating
modes
listed
in
paragraph
9H-3-2.
9H-3-7. Time Base Selector
9H-3-8. The TIME BASE selector provides gate time
control
for
frequency
measurements,
resolution
settings
for period or time interval mode, selection of number
of
cycles
averaged
during
frequency
ratio,
period
average,
or
time
interval
average
modes,
and
provides
a
scaling
factor
of
1
to
10%
in
the
totalize
mode.
The
AUTO
position
automatically
sets
the
TIME
BASE
selection (for maximum resolution within 1.1 second
measurement time) for frequency gate time, and for
number of cycles averaged in ratio, period average
and time interval average measurements.
9H-3-9. Signal Conditioning Controls
9H-3-10.
Four
types
of
signal
conditioning
controls
are
provided
for
each
channel
(A
and
B)
input.
These
controls
allow
adjustment
of
trigger
level
and
selection
of
attenuation,
slope
and
ac
or
de
coupling.
The
effect
of
these
controls
is
to
minimize
inaccuracies
in
measurements
(refer
to
Figure
9H-3-1).
9H-3-11. ATTENUATORS. X1 and X10 positions (both
channels). The X10 position of the attenuator switch:
is used to attenuate large amplitude signals. The XI
position represents no attenuation. The switch setting
X10 increases the trigger levels and hysteresis voltages
by a factor of 10. Ifinput signal levels are unknown, the
initial measurements should be made with the attenua-
tor switches set to X10. The setting may then be
changed to X1 if necessary to obtain a stable, usable
measurement.
9H-3-12. SLOPE SWITCHES (both channels). The
slope switches allow triggering on the positive slope
or the negative slope of the input signals (see
Figure 9H-3-1).
9H-3-13. LEVEL A and LEVEL B. The level controls
allow adjustment of the triggering point on the input
signal waveform. With the LEVEL controls set to the
“0” position (or to the SET position when the rear panel
“SET” TRIG LEVELS switch is in the .0V position as
described in Figure 9H-3-3) triggering is centered
around zero volts. The voltage range over which
triggering may be set is +2 volts with the attenuators
in the X1 position or +20 volts with the attenuator
switch in the X10 position.
9H-3-14. AC-DC SWITCHES (both channels). The
AC-DC switches select ac or de coupling. In AC posi-
tion with the LEVEL control set for triggering centered
around zero ac volts, the de components on the signal
have no effect. In DC position with the LEVEL control
in SET (as described in the preceding paragraph)
triggering is centered around zero volts de.
9H-3-15. 0/C (open/close) Switch
9H-3-16.
This
pushbutton
switch
controls
totalizing
of
Channel
A
input
signals
as
described
in
paragraph
9H-3-34.
This
switch
also
controls
the
stopwatch
function
as
described
in paragraph
9H-3-40.
9H-3-17. SEP-CHK-COM B Switch
9H-3-18.
This
switch
provides
selection
of
separate
Channel
A
and
Channel
B
inputs
in
the
SEP
position.
The
CHK
position
enables
the
self
check
function
as
described
in
paragraph
9H-3-39
and
the
stopwatch
function
as
described
in
paragraph
9H-3-41.
The
COM
B
position
connects
the
CHAN
B
connector
on
the
front
panel
to
the
Channel
A
and
Channel
B
ampli-
fier
circuits
in
parallel.
9H-3-1

Model 53084.
Operation
TRIGGER
VOLTAGE
\
\
RECOVERY
VOLTAGE
+ SLOPE
= O LEVEL
HYSTERESIS PSET
(NOTE E)
nn ha
— SLOPE
HYSTERESIS (NOISE REJECTION} VOLTAGE IS CONSTANT FOR
EACH ATTENUATOR SETTING AND DOES NOT VARY WITH
TRIGGER LEVEL
THIS ALLOWS ZERO VOLTS TRIGGERING WITH GOOD NOISE
REJECTION
ATTENUATOR: X1, X10 CHANGES TRIGGER LEVEL AND
HYSTERESIS VOLTAGES BY FACTOR OF 1, 10,
Figure 9H-3-1. Signal Conditioning Using
Attenuator, Level and Slope Controls
SH-3-1S. MODES OF OPERATION
9H-3-20. The 5308A provides seven modes of operation
in addition to a self-check function and a stopwatch
function. Some modes of operation are available on
both channels (A or B) while other modes are
available on only one channel. In all cases, the
modes are selected by the FUNCTION switch. The
modes and functions are:
a. Frequency Mode (Channel A or B).
b. Frequency Ratio Mode (Channel A/B).
c. Period Mode (Channel B only).
d. Period Average Mode (Channel B only).
e. Time Interval Mode (Channel A to B or
Channel B only).
f. Time Interval Average Mode (Channel A to B
or Channel B only).
g. Totalize Mode (Single or two channel).
h. Self Check Function.
i. Stopwatch Function.
9H-3-2
9H-3-21, Frequency Mode (Channel A or B)
9H-3-22, Frequency measurements may be made on |
Channel A or B from 0 to 75 MHz. Front panel controls
are set to the same relative positions for measurements
on either channel with the exception that the SEP-
CHK-COM B switch is set to SEP for Channel A and to
COM B for Channel B measurements. The LEVEL A
control
adjusts
the
triggering
point
on
the
input
signal
for
Channel
A
or
Channel
B
in
the
frequency
mode.
Accuracy is +1 count + time base accuracy.
9H-3-23. Frequency Ratio Mode (Channel A/B)
9H-3-24. The frequency ratio of Channel A signals
(from
0
to
75
MHz)
to
Channel
B
signals
(0
to
5
MHz)
can
be
measured.
The
TIME
BASE
switch
setting
(1
to
10°)
selects
the
number
of
cycles
of
the
Channel
B
signal
over
which
the
ratio
A/B
is
averaged.
Accuracy
is +1 count of Frequency A + trigger error of Frequency
B.
Increasing
the
number
of
cycles
of
Frequency
B
(higher
setting
of
TIME
BASE
switch)
results
in
increased accuracy.
9H-3-25. Period Mode (Channel B)
9H-3-26.
The
period
mode
allows
single
period
mea-
surements
to
be
made
with
frequencies
of
0
to
5
MHz
into
Channel
B.
The
resolution
is
selectable
from
100
nanoseconds
to
10
seconds
by
the
TIME
BASE
switch.
Accuracy
is
+1
count
+
time
base
accuracy
+
trigger
error.
9H-3-27. Period Average Mode (Channel B)
9H-3-28. The period average mode allows multiple
period
averages
to
be
made
with
frequencies
of
0
to
5
MHz
into
Channel
B.
The
number
of
periods
to
be
averaged
is
selected
by
the
TIME
BASE
switch
(1
to
105).
Accuracy
is
#1
count
+
time
base
accuracy
+
trigger
error.
The
+
1
count
and
trigger
error
is
reduced
in
proportion to the number of periods averaged.
9Fi-3-29.
Time
Interval
Mode
(Channel
A
to
B
or
Channel
B
only)
9H-3-30.
The
time
interval
mode
allows
time
measure-
ments
to
be
made
between
points
on
one
waveform
or
between
two
waveforms.
The
range
of
measurements
is
200
nanoseconds
to
10%
seconds
(minimum
pulse
width
of
25
nanoseconds)
with
resolution
of
100
nano-
seconds
to
10
seconds
in
decade
steps.
A
Start
signal
(Channel
A)
opens
the
main
gate
and
a
Stop
signal
(Channel
B)
closes
it.
(For
Start
and
Stop
signals
from
a
common
source,
the
CHAN
B
input
is
used
and
the
SEP-CHK-COM
B
switch
is
set
to
COM
B.)
A
TTL
low
output
is
available
at
the
GATE
OUT
connector
on
the
rear
panel
while
the
gate
is
open.
This
output
is

+ base accuracy +
used to intensity modulate an oscilloscope for display of
the time interval measured. Accuracy is + 1 count + time
trigger error. For more precise mea-
surement of trigger level, connectors are provided on
the rear panel for DVM monitoring of the trigger level
voltage.
9H-3-31. Time Interval Average Mode (Channel A
to B or Channel B Only)
9H-3-32. The time interval average mode provides
greater resolution of time interval measurements than
the time interval mode provides. The + 1 count error
can be reduced by averaging a number of measure-
ments. In the time interval average mode, the main
gate is open for the number of time intervals selected by
the TIME BASE switch. Up to 108 time intervals may
be averaged in this mode. Since the measurement
accuracy is increased by Fiz (instead of = as shown
on the display) the displayed measurement should be
evaluated by computing the true resolution which is
2100 ns where N is equal to the number of time inter-
vals selected by the TIME BASE switch. For detailed
information on time interval averaging, refer to
HP Application Note 162-1.
9H-3-33. Totalize Mode (Single or Two Channel)
H-3-34. Input signals up to 75 MHz applied to Chan-
nel A can be totalized with the TIME BASE switch in
position 1. In all other positions of the TIME BASE
switch input signals up to 5 MHz can be totalized.
The input frequency is scaled by a E equal to the
setting of the TIME BASE switch CLON).
9H-3-35. For single-che anel totalizing, the Channel A
signal is totalized under control of the O/C switch
when the FUNCTION switch is in the TOT A, AA. B
position. Totalizing is initiated by pressing the O/C
switch and terminated by pressing the O/C switch a
second time.
9H-3-36. For two-channel totalizing, the Channel A
signal is totalized under control of the Channel B signal.
When the FUNCTION switch is in the TOT A,
“LIB position (totalize Channel A during pulses on
Channel B) the Start and Stop signals on Channel B
occur between two successive trigger level crossings
in the opposite direction, as follows:
Channel B Slope Switch _/ Channel B Slope Switch A.
Start Stop Start Stop
AR PS
FUNCTION `
TOT A TOT ALR
Model 5308A
Operation
9H-3-37. When the FUNCTION switch is in the TOT A,
AA B position (totalize Channel A between pulses
on Channel B) the Start and Stop signals on Channel B
occur between two successive trigger level crossings
in the same direction as follows:
Channel B Slope Switch _/ Channel B Slope Switch ML
È
Stop
A
Ai
SC
FUNCTION
TOT A,AAB \ \
9H-3-38. Self Check Function
9H-3-39. The CHK position of the SEP-CHK-COM B
switch on the front panel provides a position where
proper operation of the majority of the logic circuits
in the 5308A and 5300B is verified. When circuits are
functioning properly, the 10N counts are displayed
for positions 10 through 10% of the TIME BASE switch
with the proper decimal position and annunciator.
9H-3-40. Stopwatch Function
9H-3-41. The CHK position of the SEP-CHK-COM B
switch also provides an electronic stopwatch function
when the FUNCTION switch is setto TOTA, AA B.
After the RESET switch is pressed, the stopwatch
count is started by pressing the O/C switch. The count
is terminated by pressing the O/C switch a second time.
To initiate a new measurement, the RESET switch
must be pressed.
9H-3-42. CONTROLS AND CONNECTORS
9H-3-43. The front panel controls and connectors are
described in Figure 9H-3-2 and the rear panel switch
and connectors are described in Figure 9H-3-3.
9H-3-44, OPERATING PROCEDURES
9H-3-45, The operating procedures for making mea-
surements in the various modes are listed in Figures
9H-3-4 through 9H-3-12.
9H-3-3

Model 5308A
Operation
3
3
2
È.
9H-3-4
FUNCTION. Eight position switch selects
mode of operation, as follows (blue lettering
matches corresponding blue lettering on
TIME BASE switch):
a.
FREQ A. Enables frequency measure-
ments of 0 to 75 MHz to be made using
Channel A.
FREQ A/B. Enables the frequency ratio
of Channel A signals to Channel B signals
to be taken. The ratio of Channel A input
signals (from 0 to 75 MHz) to the Chan-
nel B input signals (0 to 5 MHz) can be
measured. The ratio is averaged over
N cycles of the Channel B signal. N is
selectable from 1 to 108 by the TIME
BASE switch. Accuracy is +1 count of
frequency A, + trigger error of Fre-
quency B.
TIME AVG A-B Sets counter to measure
average time interval, A to B. Channel A
starts the interval and Channel B stops
the interval. The TIME BASE switch
(blue lettering) sets the number of time
intervals to be averaged. Time interval
input range is 1 ns to 10 s; there must be
a 200 ns deadtime between intervals.
d.
TIME A—B. Sets counter to measure time
interval A to B. Channel A starts the mea-
surement and Channel B stops the mea-
surement. Time interval input range is
200ns to 10%s (25ns minimum pulse
width). The TIME BASE switch (black
lettering) selects resolution of 100ns
to 10 s.
PER AVG B. Enables multiple period
averages to be made from Channel B with
frequencies of 0 to 5 MHz (range of 200 ns
to 10 s). Use TIME BASE switch (blue
lettering) to select number of periods to
be averaged (1 to 108).
PER B. Enables single period measure-
ments to be made from Channel B with
frequencies of 0 to 5 MHz. The TIME
BASE switch (black lettering) selects
resolution of 100 ns to 10s.
TOT A, LI B. Totalizes signals on
Channel A during pulses on Channel B.
(Refer to paragraph 9H-3-33.) Totalizes
signals up to 75 MHz with TIME BASE
switch in position 1 (blue lettering), up to
5 MHz with TIME BASE switch in any
other position (10N),
Figure 9H-3-2. Front Panel Controls and Connectors

b. TOT A, AAR Totalizes Channel A be-
tween pulses on Channel B. (Refer to para-
graph 9H-3-33.) Totalizes signals up to 75
MHz with TIME BASE switch in position 1
(blue lettering), up to 5 MHz with TIME
BASE switch in any other position (10N).
2. TIME BASE. Ten position switch performs the
following functions:
a. lps, 10 us, .Ims, 1 ms, 10 ms, .1s,1s,10s
(black lettering). Provides eight selectable
times as gate time controls for frequency
(FREQ A) measurements.
b. .1 us, 1 us, 10 us, .1 ms, 1 ms, 10 ms, Ja
1 s, 10 s (black lettering). Provides resolu-
tion of 100 ns to 10 s when FUNCTION
switch selects period (PER B) or time inter-
val (TIME A — B) mode of operation.
c. 1, 10, 102, 103, 104, 105, 108, 107, 108, (blue
lettering). Provides selection of number of
eycles or events averaged when FUNC-
TION switch selects frequency ratio (FREQ
A/B), period average (PER AVG B), or time
interval average (TIME AVG A-B)
d. 1, 10, 102, 10%, 104, 105, 108, 107, 108, (blue
lettering). Provides scaling factor when
FUNCTION switch selects totalize (TOT
A, “LI B/TOT A, AA B) modes of opera-
tion.
e. AUTO/.1 us 1. The AUTO position pro-
vides four function auto-ranging (pertains
to gray-bordered FUNCTION switch posi-
tions) including frequency (FREQ A), fre-
quency ratio (FREQ A/B), period average
(PER AVG B) and time interval average
(TIME AVG A-B). Provides maximum
resolution that can be obtained in each
function within a maximum of 1.1 second
measurement time.
f. AUTO/.1 us 1. The .1 us 1 position per-
tains to the FUNCTION switch lower-half
positions (corresponding letter colors). The
.1 us position (black lettering) pertains to
TIME A—B and to PER B. The 1 position
(blue lettering) pertains to TOT A, LI B
and to TOT A, -AALB.
O/C (open/close). Pushbutton switch enables
input signals to Channel A to be totalized
when the FUNCTION switch selects TOT A,
AA D Totalizing is initiated by pressing
the O/C switch and is terminated by pressing
the switch a second time. To reinitiate the
Model 5308A
Operation
totalize function the reset switch on the front
panel of the 5300B mainframe must be
pressed. An additional function of the O/C
switch is to operate the display as a stop- ~
watch (see Figure 9H-3-12),
LEVEL A and LEVEL B. Used in conjunction
with ATTENUATORS switch to determine
voltage at which triggering occurs for Chan-
nel A or Channel B. In SET position, trigger-
ing is centered around 0 volts when the rear
panel “SET” TRIG LEVELS switch is in the
OV position. Trigger level is continuously
variable over the range of +2V (ATTENUA-
TORS IN X1) or +20V (ATTENUATORS
in X10). Adjacent lamp indicates when ampli-
fier triggering occurs.
CHAN A and CHAN B. Input connectors for
Channel A and Channel B. Input impedance
is 1MQ shunted by less than 48 pF. By using
a 10 to 1 divider probe, input impedance can
be increased to 10 MO.
Slope Switch. Selects the triggering on posi-
tive or negative slope of the input signals to
Channel A (switch on left side) or Channel B
(switch on right side).
SEP-CHK-COM B.
mon B).
(Separate-Check-Com-
a. SEP. Channel A and Channel B are con-
nected for separate source inputs (1 MO
input impedance).
b. CHK. Self check verifies that the major-
ity of the 5300B mainframe logic circuits
and the 5308A logic circuits are function-
ing properly.
c. COM B. Disconnects front panel input
connector CHAN A and connects
CHAN B to the amplifiers for Channel
A and Channel B in parallel (IMQ input
impedance).
ATTENUATORS. Selects attenuation of the
input signals to Channel A (switch on left
side) and to Channel B (switch on right side).
a. X1 connects input signals directly to input
amplifiers.
b. X10 attenuates input signals by a factor of
10.
. AC-DC. Selects ac coupling or de BE of
the input signals to Channel A (switch on left
side) or Channel B (switch on right side).
Figure 9H-3-2. Front Panel Controls and Connectors (Cont'd)
9H-3-5

Model 5308A
Operation
T;
9H-3-6
‘SET’ TRIG LEVELS. Three position switch
presets the trigger level to the indicated vol-
tage (-.13V, .0V, +.15V) when the LEVEL
control on the front panel is in the SET posi-
tion. With a 10:1 divider probe connected to
the CHAN A or CHAN B connector on the
front panel, the -.13V position is used when
checking ECL logie circuits and the +.15V
position is used when checking TTL logic cir-
cuits. The .OV position is used when measur-
ing a symmetrical waveform such as a sine
Wave.
TRIG LEVELS A and B. Connectors provide
for measurement of Channel A or Channel B
trigger levels by a monitoring DVM. The
trigger level voltage is measured at the mid-
point of the hysteresis band.
GATE OUT. Provides a TTL level signal
(LOW) while the 5300B main gate is open.
Used for time interval measurements to
intensity modulate an oscilloscope to indi-
cate the interval being measured.
4. TIME BASE OUT. This connector provides
two different outputs, selectable by the posi-
tion of the FUNCTION switch, as follows:
a. In the TOT A, LI Band TOT A, AA B
positions of the FUNCTION switch, the
TIME BASE OUT connector provides a
scaled (divided) output of the input
signal frequency applied to Channel A.
The output is scaled by a factor of from 10
to 10% as set on the TIME BASE control.
b. In the PER B and TIME A- B positions of
the FUNCTION switch, the TIME BASE
OUT connector provides a scaled output
of the internal 10 MHz oscillator fre-
quency. The output is scaled by a factor of
from 10 to 10% as set on the TIME BASE
control. The period of this output is indi-
cated by the black lettering on the TIME
BASE control. The same output is pro-
vided when the FUNCTION switch is in
TOT A, LF B or TOT A, AA B posi-
tion and the SEP-CHK-COM B switch is
in the CHK position.
F igure 9H-3-3. Rear Panel Control and Connectors

Model 5308A
Operation
1 (REAR)
5,6,7,8,9,10
NOTE 4. Set the FUNCTION switch to FREQ A.
If proper indications are not
received during the self
check, refer to the trouble- Set the TIME BASE switch to the positions
SE procedures in Sec- listed below and observe the display.
ion V.
Connect ac power to 5300B ac receptacle.
Frequency A Self Check
Turn ac power on with 53008 SAMPLE RATE
control. Adjust SAMPLE RATE for desired TIME BASE DISPLAY ANNUNCIATOR
display time.
AUTO 10000.000 kHz
Set the SEP-CHK-COM B switch to CHK lus 10000.0090 kHz |
lus 00000010 MHz |
NOTE 10 us 0000010.0 MHz
1 ms 000010.00 MHz
All display indications are +1 ims - 00010.000 MHz
count. In the 10% position of 10 ms 0010000.0 kHz
the TIME BASE switch, wait 1s 010000.00 kHz
10 seconds for the count ls 10000.000 kHz
display. 10s °0000000.0 Hz
e = OVERFLOW
Figure 9H-3-4. Making Self Check Measurements
9H-3-7

Model 5308A
Operation
Ratio
Seli
Check
TIME
BASE
DISPLAY
ANNUNCIATOR
6.
Set
the
FUNCTION
switch
to
FREQ
A/B.
AUTO
1000000.0
us
Set
the
TIME
BASE
switch
as
shown
below
lus
1000000.0
ES
and
observe
the
display.
lus
00000010
us
10 us 000.00100 - s
TIME
BASE
DISPLAY
ANNUNCIATOR
1
ms
0000.1000
8
ims 00010.000 $
AUTO
1000000.0
u
10
ms
001000.00
s
1
10000000
‚is
0100000.0
S
10
0000001.0
is
10000000
S
102
000001.00
10s
e000000.00
ks
108 00001 .000
104
0001.0000
e
=
Overflow
10° 001.00000
108
01000000
Uu
Time
Interval
Self
Check
sn
“i
S
9.
Set the
FUNCTION
switch
to
TIME
A-B.
Set the TIME BASE switch as shown below
s= Ovidio and observe the display.
TIME BASE DISPLAY ANNUNCIATOR
AUTO 1000000.5 MS
A ps 1000000.5 us
l us 00000015 us
i | 10 us 000.00105 s
Period Average Self Check Ta 0000.1005 >
7. Set the FUNCTION switch to PER AVG B. Da GE e
Set the TIME BASE switch as shown below 10 ms 001000.05 E
and observe the display. at bo See j
TIME
BASE
DISPLAY
ANNUNCIATOR
SC
RE
Ke
AUTO 100.00000 Mus e = Overflow
ei nu. i Time interval Average Self Check
10?
00000.100
Us
10.
Set the
FUNCTION
switch
to
TIME
AVG
105 0000.1000 Jus A-B. Set the TIME BASE switch as shown
10° 000.10000 MS below and observe the display.
105 00100.000 Mus
105
0100.0000
Mus
TIME
BASE
DISPLAY
ANNUNCIATOR
10° 100.00000 Mus
108 200000.000 AUTO 100.00000 Mus
1 1000000.0 HS
e = Overflow 10 000000.10 us
102 -00000.100 HS
Mus = Nanoseconds 103 0000.1000 us
104 000,10000 MS
10° 00100.000 Mus
106 0100.0000 Mus
107 100.00000 Mus
Period Self Check 103 *00000.000
8. Set the FUNCTION switch to PER B. Set the e = Overflow
TIME BASE switch as shown below and
observe the display. Mus = Nanoseconds
Figure 9H-3-4. Making Self Check Measurements (Cont’d)
9H-3-8

Model 5308A
Operation
1 (REAR)
2
5,11
3,9
4,10
8,14 5,7,11,13 6 5,11 12
SEE WARNING ON PAGE 9H-3-11
Connect ac power to 5300B ac receptacle. 10. Set SEP-CHK-COM B to COM B.
Turn ac power on with the 5300B SAMPLE NOTE
RATE control.
In the Frequency mode of operation, the
Channel A CHAN B input is processed by the
Set
FUNCTION
to
FREQ
A
and
adjust
Channel
A
amplifier
circuit.
Conse-
SETE Se e quently, the slope and LEVEL controls
SM RALE for este display time: for Channel A are effective as listed
Set SEP-CHK-COM B to SEP. below. The Channel B ATTENUATORS
and AC-DC switches are effective (see
Set ATTENUATORS to X10; AC-DC to AC Figure 9H-8-1).
and Channel A slope switch to polarity
desired. Set LEVEL A to SET.
NOTE 11. Set ATTENUATORS (Channel B) to X10;
sia
ge
AC-DC
(Channel
B)
to
AC
and
Channel
A
Ensure
that
the
‘SET
TRIG
LEVELS
slope
switch
to
polarity
desired.
Set
LEVEL
A
switch
on
the
rear
panel
is
in
the
.0V
to
SET.
eo
position
when
the
LEVEL
control
is
in
NOTE
the SET position; Ensure that the ‘SET’ TRIG LEVELS -
switch on the rear panel is in the .0V
position when the LEVEL control is in
the SET position.
Connect input signal (up to 75 MHz) to be
measured to CHAN A connector.
Observe
display.
If
display
is
not
stable,
n
rotate
LEVEL
A
control
until
trigger
light
12.
Connect
input
signal
(up
to
75
MHz)
to
be
illuminates.
If
necessary,
set
ATTENUA-
measured
to
CHAN
B
connector.
TORS switch for Channel A to X1.
13. Observe display. If display is not stable,
Set
TIME
BASE
to
desired
gate
time
or
to
rotate
LEVEL
A
control
until
trigger
light
AUTO.
illuminates.
If
necessary,
set
ATTENUA-
Channel
B
TORS
switch
for
Channel
A
to
X1.
Set FUNCTION to FREQ A and adjust 14. Set TIME BASE to desired gate time or to
SAMPLE RATE for desired time. AUTO.
Figure 9H-3-5. Making Channel A and Channel B Frequency Measurements
9H-3-9

2
m
SE
F
he
Z
MO
E
EZ
Ei
>
45
ope
È
Q
S
we
E
3
=
EX.
A
Weg
ES
A
N
a
m
Sp
9
dv
+
oe
n]
pe
KÉ
O
Zo
Za
en
ri
mo
Mm
d
Da
Gi
E
È
ZELDA
y
Ii,
5
5
3
E
as
Gi
opg
=
>.
ala
E
pra
w
©
bai
S
A
E
Seto
als
de
.
E
=
z
ADA
g
23°
3
2
2
Ë
Sas
y
EE
E
2
2
SR
6
5
RER
E
a
Ex
TRES
=
328
E
z
n
zu
"EI
=
eg
om]
q
Gi
D
E
W
Gx
NES
ef,
ovo
2
9
ES
22
Sein
3
aa
È
<
SÈ
a
Fo
a
go
88
BEBO
SE
È
p
det
08
OLA
zz
3
emi
D
D
D
D
E
5
o
e
vi
z
2
eb]
+
S
=
«ri
o
s
a
o
e
Ge
a
i
ES
ERSTE
=
2
>
ce
=
.
2
di
E
SES
a
a
D
EZ
S
a
È
<
E
T
=
2
=
3
o
lia
KS:
i
u
v
S
:
2354
ES
2
me
N,
A
isa
ES
p
2
M
a
E
228
SÉ
a
S
©
Qu
ang
dò
Ha
“~~
y
Ka
=
Q
=
ka
E
B
F
S
Rest
i
YN
10
Ka
=
Ù
SS
=
ni
og
o
E
To
o
ee
oc
"=
S
M
È
es
ys
Bä
Seier
DW
Gel
=
O
SLA
Lo
S
=
a
O
£
e
J
o7
©
©
Le
O
ems
E
+,
$
i
Na
oh
Qu
Ex
Ze
O
yx
“Ra
moa
2
CH
:
EN
H
sc
E
&
2
o
=
Si
zaog
SE
a,
O
S
So
Lis
Sts
B
oz
A
A
sI
Bas
ba
D
BS
=
El
Moa,
2.4
MOL
>
S
cë
&
Q
Ad
oO
=
mS
+
+2
42
=
Sq
D
e
>
5
Do
>
Doo
2.28
A
O
E
3
DI
Re
NS
oO
pitt
D
D
D
D
+
ur
35
rc
N
oD
xt
uf)
A
Li
20
D