5315 B | User manual | Hewlett-Packard 5315 A, B Universal Counter Operating and Service Manual

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Hewlett-Packard 5315A/B 100 MHz Universal Counter Operating and Service Manual | Manualzz
 OPERATING AND SERVICE MANUAL
SERIAL PREFIX: 2538A
This manual applies to instruments with Serial Prefix 2538A
unless accompanied by a Manual Change Sheet.
OLDER INSTRUMENTS
For Serial Prefixes 2536A and below, refer to Section Vil for
manual backdating.
Valuetronics International, inc.
1-800-562-6258
5 ^
|
MASTER COPY
й a "a ami ña Ed, e e
= BER ERE de Cu > id
© Copyright HEWLETT-PACKARD COMPANY 1986
5301 STEVENS CRK. BLVD., SANTA CLARA, CALIFORNIA 95051-7299
MANUAL PART NUMBER 05315-90028
Microfiche Part Number 05315-80029
Printed SEPT 1956
Model 5315A/8
Safety Considerations
GENERAL
This product and related documentation must be reviewed for familiarization with safety markings and
instructions before operation.
This product is a Safety Class | instrument (provided with a protective earth terminal).
BEFORE APPLYING POWER
Verify that the product is set to match the available line voltage and the correct fuse is installed. Refer
to Section |}, Installation.
SAFETY EARTH GROUND
An uninterruptible safety earth ground must be provided from the mains power source to the product
mn |. input wiring terminals or supplied power cable.
SAFETY SYMBOLS
instruction manual symbol; the
product will be marked with this
symbol when it is necessary for the
à The WARNING sign denotes a
| WARNING Ë hazard. It calls attention to a
EA e ee p roce d ure | р rac ti ce ; or th e Hi ke
user to refer to the instruction which, if not correctly performed or adhered to,
manual. - could result in personal injury. Do not proceed
beyond a WARNING sign until the indicated con-
indicates hazardous voltages. ditions are fully understood and met.
; : , | Y The CAUTION sign denotes a
Indicates terminal is connected 3 CAUTION $ hazard. It calls attention to an
to chassis when such connection | SV
ew is not apparent operating procedure, practice, or
the like, which, if not correctly performed or
| adhered to, could result in damage to or destruc-
NA Alternating current. tion of part or all of the product. Do not proceed
beyond a CAUTION sign until the indicated con-
Direct current. ditions are fully understood and met.
| WARNING |
Any interruption of the protective grounding conductor {inside or outside the instrument) or discon-
necting the protective earth terminal will cause a potential shock hazard that could result in personal
injury. (Grounding one conductor of a two conductor outlet is not sufficient protection.)
Whenever it is likely that the protection has been impaired, the instrument must be made inoperative
and be secured against any unintended operation.
if this instrument is to be energized via an autotransformer (for voltage reduction) make sure the common
terminal is connected to the earthed pole terminal (neutral) of the power source.
Instructions for adjustments while covers are removed and for servicing are for use by service-trained
personnel only. To avoid dangerous electric shock, do not perform such adjustments or servicing unless
quatified to do so.
For continued protection against fire, replace the line fuse(s) only with 250V fuse(s) of the same current
rating and type (for example, normal blow, time deiay}. Do not use repaired fuses or short circuited
fusehoiders.
Model 5315A/B
General Information
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Figure 1-1, Models 5315A and 5315B Universal Counters
Model 5315A/B
General information
GENERAL INFORMATION
1-1, INTRODUCTION
1-2. This manual provides information about installation, operation, testing, adjustments, and
servicing the Hewlett-Packard Model 5315A and 5315B Universal Counters, shown in Figure 7-1.
1-3. The 5315B is functionally identical to the 5315A. The major difference is that the 5315B is
designed for rack mounting or stacking and features a metal cabinet to minimize electro-
magnetic interference. (The 5315A has a high-strength plastic cabinet.)
1-4. This manual has eight sections, each covering a particular topic for using and servicing the
5315A and 53158. The topics by section number are:
Section Topic
| General Information
E installation
Ш Operation
IV Performance Tests
\ Adjustments
VI Replaceable Parts
Vil Manual Changes
Vill Service
1-5. DESCRIPTION
1-6. The HP 5315A and 5315B are universal counters, measuring signals over a range from 0.1 Hz
to 100 MHz. The 5315A and 5315B measure frequency, period, time interval, time interval
average, time interval holdoff (delay), and ratio. A totalize function with manual or external
gating is also provided. All measurements except totalize are displayed in scientific notation
with up to eight digits of resolution.
1-7. Two independent input channels provide time interval measurements. Each input chan-
nel has an attenuator (X1, X20), trigger slope selector, trigger level and sensitivity control, and
AC-DC coupling. A switchable low-pass filter on Channel A and three-state trigger lights are
also provided.
1-8. Option 003, 1 GHz third or “C” input channel for the 5315A/B, provides frequency
measurements from 50 MHz to 1 GHz. The input sensitivity is 15 mV for frequencies between
50 and 650 MHz, and 75 mV for frequencies between 650 MHz and 1 GHz. The C Channel is
a 50-ohm input with a dynamic input range of 1V rms. The input is prescaled by 10 to achieve
a 1 GHz frequency range. Complete specifications for the Option 003 are listed in Table 1-7.
1-9. SPECIFICATIONS
1-10. The instrument specifications are listed in Table 1-1. These specifications are the perfor-
mance standards or limits against which the instrument may be tested.
Model 5315A/8
General Information
Table 1-1. 5315A/B Specifications*
INPUT CHARACTERISTICS: (Channel A and Channel 8)
Range:
DC coupled, 0 to 100 MHz,
AC coupled, 30 MHz to 100 MHz,
Sensitivity:
10 mV rms sine wave to 10 MHz.
25 mV rms sine wave to 100 MHz.
75 mV peak-to-peak pulse at minimum pulse width
of 5 ns,
Sensitivity can be varied continuously up to 500 mv rms
mode, trigger level is automatically set to OV NOMINAL.
Dynamic Range:
30 mV to 5V peak-to-peak, 0 to 10 MHz.
75 mV to 5V peak-to-peak, 16 to 100 MHz.
Signal Operating Range: +2.5V DC to -2.5V DC.
Coupling: AC or DC, switchable.
Filter: Low pass, switchable in or out of Channel A.
3 dB point of NOMINALLY 100 kHz.
Impedance: 1 MO NOMINAL shunted by less than 40 pr.
Attenuator: XT or X20 NOMINAL, -
Trigger Level: Variable between +2.5V DC and -2.5V DC.
Slope: Independent selection of + or - slope.
Common Input: Alf specifications are the same for
Common A except the following:
Sensitivity: 20 mV rms to 10 MHz, 50 mV rms to 100 MHz,
150 mV peak-to-peak.
Dynamic Range: 60 mV-5V peak-to-peak 0-10 MHz,
150 mV-5V peak-to-peak 10-100 MHz.
Impedance: 500 k{} (Nom! shunted by less than 70 oF.
Damage Level:
AC&DC X 1:
DC to 2,4 kHz
2.4 kHz to 100 kHz
250V (DC + AC rms)
6 X 105V rms Hz/FREQ
>100 kHz ov rms
AC&DC X 20:
DC to 28 kHz 500V {DC + AC peak)
28 kHz to 109 kHz 1 x 107V rms Hz/FREQ
>100 kHz TOOY rms
FREQUENCY (Channel A)
Range: 0.1 Hz to 100 (burst or cw).
MOTE
Between 0.1 Hz and 0.14 Hz, the resolu-
tion is one millihertz.
LSD Displayed: 10 Hz to 1 nHz depending upon gate time
and input signal. At least 7 digits displayed per second
of gate time.
**Resolution:
Trigger Error
+ TLAX - ETI
SDT + 1.4 Gate Time X FREQ, FREQ <10 MHz,
+ LSDF, 210 MHz.
Accuracy: +Resolution + (time base error} X FREQ.
**Best Case Resolution for 1 Second Gate
NOMINAL by adjusting SENSITIVITY control, In SENSITIVITY
PERIOD
Range: 10 ns to 105 s,
15D Displayed: 100 ns to 1 fs depending upon gate
time and input signal. At least 7 digits displayed
per second oi gate time.
Resolution;
+ LSDF + 1,4 x 188er EITOL_ Y PER PER > 100 ms,
Gate Time
+ L504, PER < 100 ns.
Accuracy: + Resolution + (time base error} X PER,
TIME INTERVAL
Range: 100 ns to 105 s,
LSD Displayed: 100 ns.
Resolution: + LSD + Start Trigger Error + Stop
Trigger Error.
Accuracy: + Resolution + (time base error) X TI.
TIME INTERVAL AVERAGE
Range: 0 ns to 105 s.
15D Displayed: 100 ns to 10 ps depending upon
gate time and input signal. See table in
Definitions section.
Resolution:
Start Trigger Error
+ Stop Trigger Error
Accuracy: X Resolution + {time base error) X TI + 4 ns,
Number of intervals averaged (WN): N= Gate Time X FREQ,
Minimum Dead Time (stop to start): 200 ns.
E LSD +
TIME INTERVAL DELAY (Holdoff)
Front panel gate time knob inserts a variable delay of
NOMINALLY 500 us to 20 ms between START
(Channel A} and enabling of STOP {Channel 8).
Electrical inputs during delay time are ignored. Delay
time may be digitally measured by simultaneously
pressing T.1. Averaging, 1.1. Delay, and blue key.
Other specifications of T.l. Delay are identical to
Time Interval,
RATIO
Range: 0.1 Hz to 100 MHz, both channels.
15D:
23 X Period A X Ratio, {rounded to nearest decade)
Cate Time
Resolution:
+usp+ B'rigser Error y pato.
Gate Time
Accuracy: Same as resolution. Highest frequency input is
connected to Channel A to achieve specified accuracy.
100 Hz 1 kHz 10 kHz | 100kHz 1MHr | 10 MHz | 100 MHz| TOTALIZE
‹ | Manual:
50 my rms | +.0004 Hz | +.00048 Hz | +0.0014 Hz | 20.01 Hz | +01 Hz | +1 Hz +10 Hz Range: 0 to 100 MHz,
106 mV rms| 5,0002 Hz | +.00029 Hz +0.0012 Ha | +001 Hz | +01 Hz | +1 Hz | +10 Hr A Gated by B:
500 mV rms| +.00005 Hz | +.00074 Hz | +0.0011 Hz | £0.01 Hz | 40,1 Hz | +1 Hr | 210 Hy
Worms | +,00003 Hz} 2.00012 Hz] #0.0010 Hz | 0.01 Hz | +04 Hz | +16 | +10 He closes on B slope.
This chart shows best case frequency reduction versus put sinewave rms amplitude.
This is best case because noise from the signal source is assumed to be zero: the
trigger error is produced only by the counter’s noise fie, 120 uV rms),
Range: 0 to 100 Miz.
Resolution: + 1 count.
Totalizes input A between two events of B.
Instrument must be reset to make new
measurement. Gate opens on A slope,
Accuracy: + 1 count + B Trigger Error X Frequency A,
*Specifications describe the instrument's warranted performance, Supplemental
instrument by giving TYPICAL or NOMINAL, but nonwarranted
For a more detailed explanation,
see HP Application Note 200-4 “Understanding Frequency Counter Specifications”,
characteristics are intended to provide information useful in applications of the
performance parameters. Definition of terms is provided at the end of the specification section.
Model 5315A/B
General Information
Table 1-1. 5315A/B Specifications (Continued)
TIME BASE
Frequency: 10 MHz.
Aging Rate: <3 parts in 107/mo.
Temperature: 55 parts in 106, 0 to 50°C,
Line Yoltage: <+1 part in 107 for 710% variation.
GENERAL
Check: Counts internal 10 MHz reference frequency
over gate time range NOMINALLY 500 us to 20 ms,
Error Light: LED warning light activated if logic error is
found during instrument turn-on self-check.
Display: §-digit amber LED display, with engineering
units annunciator.
Overflow: Only frequency and totalize measurements
will overflow. In case of overflow, eight least significant
digits will be displayed and amber front panel overfiow
LED will be actuated. All other measurements which
would theoretically cause a display of more than
8 digits will result in the display of the 8 most
significant digits.
Gate Time: Continuously variable, NOMINALLY from
60 ms to 10 s or 1 period of the input, whichever
is longer.
Sample Rate: Up to 5 readings per second NOMINAL ex-
cept in time interval mode, where it is continuously
variable NOMINALLY from 4 readings per second to 1 reading
every 10 seconds via Gate Time control.
Operating Temperature: 09 to 50%.
Power Requirements: internally switch selectable 100, 120,
220, or 240Y 1+5%, -10%) 48-66 Hz; 15 YA maximum.
Weight: Net, 2.2 kg (4 tbs. 12 oz); Shipping, 4.1 kg {9 ¡bs.].
Dimensions: 238 mm Y X98 H X 276 mm D
(938 X 37/8 X 107% in}
- OPTIONS
Option 001: Temperature Compensated Time Base (TCXO)
Frequency: 10 MHz,
Aging Rate: <1 partin 107/mo.
Temperature: +1 part in 106, 0° to 40°C ref to 25°C if offset
frequency is used.
Line Voltage: <1 part in 108 for 210% variation.
Option 002: Battery {5315A only}
Type: Rechargeable lead-acid {sealed}.
Capacity: TYPICALLY 4 hours of continuous opera-
tion at 25°C.
Recharging Time: TYPICALLY 16 hours to 98% of full
charge, instrument nonoperating. Charging circuitry
included with Option. Batteries not charged during
instrument operation.
Low Voltage Indicator: Instrument turns itself off
automatically when low battery conditions exists.
Discharge LED flashes slowly when this happens.
Discharge LED is on whenever battery is supply-
ing power to instrument,
Charge LED indicates state of charge of battery
during charging only and is on whenever battery
is charged to 95% NOMINAL of capacity.
Charge LED flashes when 90% NOMINAL of
charge taken out is replaced. Charge LED is
off if charge is less than 70% NOMINAL
of capacity.
Line Failure Protection: Instrument automatically
switches to battery in case of line failure.
Weight: Option 002 adds 1.4 kg (3 165.) 10 weight
of instrument.
WARRANTY
ALL COMPONENTS IN OPTION 002, EXCEPT
THE BATTERY, ARE WARRANTED FOR ONE
FULL YEAR, BATTERY BT-1, (HP PART NO.
1400-6253) 15 NOT WARRANTED.
Option 083: C Channel
Input Characteristics:
Range: 50 to 1000 MHz, prescaied by 10.
Sensitivity: |
15 mV rms sine wave (-23.5 dBm} to 650 MHz.
75 MY rms sine wave [-9.5 dBm) to 1000 MHz,
Sensitivity can be decreased continuousiy by
up to 20 dB NOMINAL, 50 to 500 MHz and
10 dB NOMINAL, 500 to 1000 MHz by adjusting
sensitivity control.
Trigger level is fixed at 0Y NOMINAL.
Dynamic Range:
15 mY to 1Y rms 136 dBi, 50 to 650 MHZ.
75 mV to 1V rms (29 dBi, 650 to 1900 MHz.
Signal Operating Range: +5 Vdc to -5 Vdc.
Coupling: AC.
impedance: 500 NOMINAL (YSWK, <2.5:1 TYPICAL]
Damage Level: +18V (DC + AC peak), fuse protected.
Fuse located in BNC connector,
Frequency:
Range: 50 to 1000 MHz (burst or cwi.
LSD Displayed: 100 Hz to 1 Hz depending upon gate
time. At least 7 digits per second of gate time.
LSD, Resolution and Accuracy: Same formulas as for
Frequency A except “Gate Time” term becomes
“¡Gate Time)/107,
Option 004 (for 5315A): High Stability Time Base {Oven Oscillator)
Frequency: 10 MHz,
Aging Rate: <3 parts in 10-8/mo. (after 30 days continuous
operation, AC power applied, in OFF or ON position).
Temperature: #1 part in 10-7, §° to 50°C,
Line Voltage: <1 part in 10-8 for 10% variation,
Option 604 (for 53158): High Stability Time Base {Oven Oscillator)
Frequency: 10 MHz.
Aging Rate: <3 parts in 10-8/mo after 30 days continuous
operation.
Temperature: +2 parts in 10-8, 0° to 50°C.
Line Voltage: <1 part in 10-2 for £10% variation.
53158: Rack and stack metal case with rear panel, switchable
AC power line module,
Specifications same as 5315A except as follows:
Rack Mount Kit: 5061-0072 recommended.
Oscillator Output: 10 MHz, 50 mV p-p into 500 load
on rear panei. |
External Frequency Standard Input: 10 MHz, 1V rms
into 5000 on rear panel. Requires internal selection.
Dimensions: 212 mm W X 81 mm H Xx 345 mm D
(838 x 312 X 1334 in.).
Weight: Net, 3.2 kg (7 fbs. 2 0z.); Shipping, 4.5 kg (10 ibs.)
1-3
Model 5315A/B
General information
table 1-1. 5315A/B Specifications (Continued)
DEFINITIONS
Resolution: Smallest discernible change of —
measurement result due to a minimum change in
the input, |
Accuracy: Deviation from the actual value as fixed by
universally accepted standards of frequency and time.
Least Significant Digit (15D) Displayed:
Frequency:
2,5 x 10-7
Gate Time
2,5
Gate Time
X FREQ, FREQ <10 MHz.
FREQ =19 MHz,
Period:
2,5 X 10-7
; X PER >1 :
Gate Time PER, R >100 ns
ra ra da
X PERZ, PER 160 ns.
All above calculations should be rounded to nearest
decade {i.e., 0.5 Hz will become 10 Hz and 0.4 ns will
be 0.1 ns).
Time Interval Average LSD
1 to 25 intervals oo... et a aa 100 ns
25 to 2500 intervals ...... ere. 10 ns
2500 to 250,000 LL. rre, Tons
256,000 to 25,000,000 intervals .............. 100 ps
>25,000,006 intervals ...................... 10 ps
Time Interval Average is a statistical process. LSD
displayed is calculated for 1 standard deviation to)
confidence level,
Trigger Error:
Y (120 X 10-67 + en? seconds r
{Input slew rate at trigger point) As
where en is the rms noise voltage of the input fora
100 MHz bandwidth.
NOTES:
TDue to arithmetic truncation, quantization error wil! he
+1 or +2 counts of the LSD as follows:
LSD
+ or rase 000 x —7 с
+ 2 counts of LSD if FREQ or PER <1 X 10-7 FREQ <10 MHz.
. LSD 1/{Gate Time}
+ {J =
+ 2 counts of LSD if FREQ or PER < FRED FREQ 210 MHz.
£ 1 count of LSD for all other cases.
Model 5315A/B
General information
1-11. OPTIONS
1-12. The options available for the 5315A/B are listed below. Specifications for the options are
given in Table 1-1 and full descriptions begin with paragraph 3-62. If an option is included in the
initial order, it will be installed at the factory and will be ready for operation upon receipt.
Options 002 and 006 are available as retrofit kits for field installation. For field installation of
Options 001, 002,003, and 004, refer to the appropriate installation instructions in Section Il. The
Option 006 retrofit kit contains installation instructions.
Option Description
001 Temperature Compensated Time Base TCXO*
002 Battery and Charger (for Model 5315A only)
003 C Channel 1 GHz Input
004 High Stability Time Base -— Oven-Contained Osciliator*
006 Offset/Normalizer (Used with Modei 5315B only)
*Only one of either Option 001 or 004 can be installed.
NOTE
For Model 5315A (only), one of the following options must be
included with each order.
Option 100: 90-105 VAC; 48-66 Hz
Option 120: 108-126 VAC; 48-66 Hz
Option 220: 198-231 VAC; 48-66 Hz
Option 240: 216-252 VAC; 48-66 Hz
1-13. SAFETY CONSIDERATIONS
1-14. The 5315A/5315B Universal Counters are Safety Class | instruments, designed according to
international safety standards. This operating and service manual contains information, cau-
tions, and warnings which must be followed by the user to ensure safe operation and keep the
instrument in safe condition.
1-15. INSTRUMENT IDENTIFICATION
1-16. Hewlett-Packard instruments have 2-section, 10-character serial numbers (0000A00000),
usually on the rear panel. The four-digit serial prefix identifies instrument changes. If
the serial prefix of your instrument differs from that listed on the title page of this manual, there
are differences between this manual and your instrument. Instruments having higher serial pre-
fixes are covered with a “Manual Changes” sheet included with this manual. If the change sheet
is missing, contact the nearest Hewlett-Packard Sales and Service Office listed at the back of this
manual. Instruments having a lower serial prefix number than that listed on the title page are
covered in Section VII.
1-5
Model 5315A/B
General Information
1-17. ACCESSORIES
1-18. Table 1-2 lists accessory equipment supplied and Table 1-3 lists accessories available.
Table 1-2. Accessories Supplied
HP Part Number
8120-1378
Description
Detachable Power Cord,
229 ст (71 feet)
Table 1-3. Accessories Available
HP Part Number
5061-0072
Description
Rack Mount Kit (5315B Only)
1-19. RECOMMENDED TEST EQUIPMENT
1-20. The test equipment listed in Table 1-4 is recommended for use during performance tests,
adjustments, and troubleshooting. Substitute test equipment may be used if it meets the critical
specifications listed in the table.
Table 1-4. Recommended Test Fquipment
1-6
instrument Critical Specifications Recommended Use
Model
Oscilloscope 100 MHz Bandwidth HP 1740A AT
Synthesizer/Function 0.7—10 MHz, 5—120 mYrms HP 3325A PAT
Generator Sine and Square wave output
Signal Generator 10--100 MHz, 5—100 mYrms HP 8654A p
Synthesized Generator 50—1000 MHz, +1 to -14 dBm HP 8660C/86602A P
DC Voltmeter 20V Range, 0.05V Resolution HP 3465A АТ
50(} Feedthrough BNC Type PAT
(2 required!
Tee Connector BNC Type 1250-0781 AT
Power Splitter 56 MHz—1 GHz; HP 11667A Р
Calibrated Output
Cables (3) 4 BNC 500 11170C AT
Power Meter/Sensor 50 MHz—1 GHz; HP 436A /8481A P
| -9 to -24 dBm |
10 dB Attenuator HP 8491A Р
Adapter, Coaxial Туре N tmalej-to- 1250-0780 P
(2 required) BNC (female)
Adapter, Coaxial Туре М (male)-to- 1250-0082 Р
BNC (maie)
*P = Performance Tests, A = Adjustments, T = Troubleshooting
Model 5315A/B
Installation
SECTION II
INSTALLATION
2-1, INTRODUCTION
2-2. This section contains information for unpacking, inspection, storage, and installation.
2-3, UNPACKING AND INSPECTION
2-4. 1f the shipping carton is damaged, inspect the instrument for visible damage (scratches,
dents, etc.). If the instrument is damaged, notify the carrier and the nearest Hewlett-Packard
Sales and Service Office immediately (offices are listed at the back of this manual.) Keep the
shipping carton and packing material for the carrier's inspection. The Hewlett-Packard Sales and
Service Office will arrange for repair or replacement of your instrument without waiting for the
claim against the carrier to be settled. |
2-5. PREPARATION FOR USE
2-6, Power Requirements
2-7. The HP 5315A/B requires a power source of 100-, 120-, 220-, or 240-volt ac, +5%, -10%,
48 to 66 Hz single phase. Power consumption is approximately 12 watts. The 5315A (only) may also
be powered by the Option 002 Battery Pack. See Section |, Specifications and Section VIH, para-
graph 8-65, for description.
| CAUTION 3
Before connecting the instrument to ac power lines, be sure that
the voltage selector is properly positioned as described below,
2-8. Line Voltage Selection
2-9. The 5315A is preset at the factory to one of four line voltage selections. Refer to the rear
panel label (see Figure 2-1) to determine which of the following settings is preselected:
Option 100: 90 to 105 VAC; 48-66 Hz
Option 120: 108 to 126 МАС; 48-66 Ну
Option 220: 198 to 231 VAC; 48-66 Hz
Option 240: 216 to 252 VAC; 48-66 Hz
Figure 2-1. 5315A Line Voltage Selection Label
2-1
Model 5315A/B
Installation
2-2
2-10. Changing the 5315A power line voltage selector requires opening the cabinet. Instruc-
tions for changing the line voltage setting are given in Section V.
2-11. The 5315A has a rear-panel power module that contains a printed-circuit line voltage
selector to select 100-,120-,220-, or 240-voltac operation (see Figure 2-2). Before applying power,
the pc selector must be set to the correct position and the correct fuse must be installed as
described below.
PL BOARD PART NUMBER IS
HP 5020-8127
SELECTION OF OPERATING VOLTAGE
1, Open cover door and rotate fuse-puil te left,
2. Select operating voltage by orienting PC board
to position desired voltage on top tefl side.
Push board tirmly into module slot
3. Rotate tuse-puil back seto normal position
and re-snsert fuse in holders, using cautions to
selpet correct fuse value,
Figure 2-2. 5315B Line Voltage Selection Card
2-12. Power line voltage connections are selected by the position of the plug-in circuit card in
the module. When the card is plugged in to the module, the only visible markings on the card
indicate the line voltage to be used. The correct value of line fuse, with a 250-volt rating, mustbe
installed after the card is inserted. This instrument uses a 0.25A fuse (HP Part No. 2110-0201) for
100/120-voit operation; a 0.12A fuse (HP Part No. 2110-0318) for 220/240-volt operation.
2-13. To convert from one line voltage to another, the power cord must be disconnected from
the power module before the sliding window covering the fuse and card compartment can be
moved to expose the fuse and circuit card.
2-14. Pull on the fuse lever to remove the fuse and then pull the card out of the module. The
fuse lever must be held to one side to extract and insert the card. Insert the card so the marking
that agrees with the line voltage to be used is visible.
2-15. Return fuse lever to normal position, insert correct fuse, slide plastic window over the
compartment, and connect the power cord to complete the conversion.
Model 5315A/B
Installation
2-16. Power Cable
| WARNING |
BEFORE SWITCHING ON THIS INSTRUMENT, THE PROTECTIVE
EARTH TERMINALS OF THIS INSTRUMENT MUST BE CON-
NECTED TO THE PROTECTIVE CONDUCTOR OF THE (MAINS)
POWER CORD. THEMAINS 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),
2-17, The 5315A/B is shipped with a three-wire power cable. When the cable is connected to an
appropriate ac power source, this cable connects the chassis to earth ground. The type of power
cable plug shipped with each instrument depends on the country of destination. Refer to Fig-
ure 2-3 for the part numbers of the power cable and plug configurations available.
2-18. Operating Environment
2-19. TEMPERATURE. The 5315A/B may be operated in temperatures from 0°C to 50°C.
2-20. HUMIDITY. The 5315A/B may be operated in environments with humidity up to 95%.
However, it should be protected from temperature extremes which cause condensation in
the instrument. |
2-21. ALTITUDE. The 5315A/B may be operated at altitudes up to 4,600 metres (15,000 feet).
POWER-INPUT
SOCKET
8120-1378 8120-0698 8120-2014
Figure 2-3. Power Cable HP Part Numbers versus Mains Plugs Available
2-3
Model 5315A/B
installation
2-4
2-22. STORAGE AND SHIPMENT
2-23, Environment
2-24. The instrument may be stored or shipped in environments with the following limits:
Temperature ,......... 00.000... -40°C to +75°C
Humidity 2... ree aa se 4 a eee aa ane Up to 95%
Altitude 1.102110 a aa aa aan 7,620 metres (25,000 feet)
2-25. The instrument should also be protected from temperature extremes which cause con-
densation within the instrument.
2-26. Packaging
2-27. ORIGINAL PACKAGING, Containers and materials identical to those used in factory
packaging are available through Hewlett-Packard offices. If the instrument is being returned to
Hewlett-Packard for servicing, attach a tag indicating the type of service required, return address,
model number, and full serial number. Also, mark the container FRAGILE to ensure careful
handling. In any correspondence, refer to the instrument by model number and full
serial number,
2-28. OTHER PACKAGING. The following general instructions should be used for repacking
with commercially available materials;
a. Wrap instrument in heavy paper or plastic. (If shipping to Hewlett-Packard office or
service center, attach a tag indicating type of service required, return address, model
number, and full serial number.)
b. Use a strong shipping container. A double-wall carton made of 2.4 MPa (350 psi) test
material is adequate.
c. Use a layer of shock-absorbing material 70 to 100 mm (3- to 4-inches) thick around all
sides of the instrument to provide firm cushioning and prevent movement inside the
container. Protect control panel with cardboard.
d. Seal the shipping container securely. |
e. Mark the shipping container “FRAGILE” to ensure careful handling.
f. inanycorrespondence, refer to the instrument by model number and full serial number.
2-29. FIELD INSTALLATION OF OPTIONS
2-30. The following paragraphs provide instructions for field installation of Options 001, 002,
003, and 004. Any of the options may be installed after the purchase of the Model 5315A or 5315B
by ordering the appropriate parts listed in Table 2-1 and performing the installation procedure
for that option, Field installation instructions for the Model 5315B Option 006 are contained in
the Installation and Service Manual.
Model 5315A/B
Installation
2-31. Part Numbers for Ordering Option Kits
2-32. To obtain the necessary parts for installation of an option, order by part number as listed
below (refer to Section Vi for ordering information).
Table 2-1. Option Parts for Field Installation
Option Description HP Part Number
081 Temperature Compensated Time Base” 05315-60007
802 Battery Pack Retrofit Kit
For 5315A with serial numbers 05315-60113
prefixed 2120A and above
For 5315A with serial numbers | 05315-60105
prefixed 1812A through 2032A
003 Channel € (input to 1 GHz)
Channel C Assembly A9 05315-60008
Special BNC Connector 05305-60205
Teflon Insulator 05305-20105
Hex Nut 0590-0038
Lockwasher 2190-0124
Connector 05305-60206
Fuse 125A | 2110-0301
Front Panel {5315A; serial numbers 05315-00027
prefixed 2120A and above)
Front Panel (5315A; serial numbers 05315-00004
prefixed 1812A through 2032A)
Front Panel (5315B; serial numbers 05315-00029
prefixed 2120A and above)
Front Panel (5315B; serial numbers 05315-00008
prefixed 1812A and 2032A)
Screws. 6-32 Хх .250" Pan Head Pozidriv (4 each) 2360-0113
Reset Cable Assembly (W2); used 05315-60106
on instruments with serial numbers
prefixed 1812A to 1920A.
Connector Body 05305-20104
004; 53154 Oven-Contained Time Base” 05315-60017
004; 53158 Oven-Contained Time Base* 05315-60112
Screws securing Oscillator Mounting 2360-0115
Bracket to left side frame and
A1 motherboard,
6-32 x .317 Pan Head Pozidriv w/lock (4 each) 2360-0113
006; 53158 Offset/Normalizer Module Retrofit Kit** 05315-60110
*The mounting hardware for the standard oscillator is used to mount Options 001 and 004 (5315A), or the A15A1
Assembly of Option 004 (5315B),
**Includes installation instructions, parts and hardware.
Model 5315A/8B
installation
2-33, Installation of TCXO Option 001
2-34. Option 001 consists of a Temperature Compensated Crystal Oscillator, which replaces
the standard oscillator. To install Option 001, proceed as foliows:
Remove the AC power cord,
b. Remove the instrument top cover. For Model 5315A, this requires removal of the four
screws accessible from the cabinet bottom. For Model 5313B, loosen the single screw
on the top rear center of the top cover and slide top backwards.
c. Remove the AT Motherboard by removing the three screws located on either side of
transformer T1, and center of the board. Save the four plastic spacers.
d. Remove the two screws that secure the existing reference oscillator; remove the
oscillator circuit board.
e. Insert the A7 TCXO assembly, with components facing to the outside of the instrument,
into 2 of the A1 Motherboard assembly. See Figure 5-3.
f. Secure the assembly by installing the two screws through L-brackets with lockwashers
and hex nuts.
g. Perform Option 001 adjustment as described in Section V.
h. Replace A1 Motherboard, the four spacers and the top cover.
2-35. Installation of Battery Pack and Charger Option 002
2-36. Option 002 consists of a rechargeable battery and charger assembly (A6), which are in-
stalled in the top cover of Model 5315A. To install Option 002, proceed as follows:
NOTE
Option 002 may be installed only in Model 5315A. Installation
should be performed by qualified service personnel only.
a. Remove the AC power cord.
b. Remove the instrument top cover by removing the four screws accessible from the
cabinet bottom.
c. Position the bracket assembly, with A6 and BT1 installed, onto the six mounting posts on
the inside top cover, placing the charger toward the frontand the battery toward the rear
of the instrument. Secure with six press-on retainers supplied. The “ground clip”
should be positioned as shown in Figure 5-4.
d. Connect J1 of the A6 Charger assembly to J4 of the A1 Motherboard assembly using cable
harness supplied. Position cable negative battery terminal lead beside the battery
cover {refer to Figure 5-3).
NOTE
Connectors on this harness are polarized; do not force
the connectors.
e. Ifthe oven oscillator (Option 004) is installed, add a short insulated jumper wire at A1W1
(refer to the 5315A AT Assembly Schematic), |
f. Perform the Option 002 adjustment as described in Section V.
g. Replace the top cover. Position the cable harness so the cable will not be pinched by
the cover.
2-6
Model 5315A/B
Instaliation
2-37. Installation of © Channel Option 003
2-38. Option 003 consists of a 1 GHz Channel Assembly (A9) which plugs into an existing
motherboard connector. Procedures are provided for the installation of Option 003 in Model
5315A (paragraph 2-39) and Model 5315B (paragraph 2-40).
NOTE
If Option 003 is to be installed in a 5315A/B with a Serial Prefix of
1920A or earlier, the following modifications must be performed.
1. On A1 Motherboard, using diagonal pliers, clip off
pin 1 of ATJ6.
2. Оп А9 С Channel, install the RESET CABLE W2 (HP
Part No. 05315-60106), by soldering the end (opposite
the connector pin) into the vacant printed circuit
pad next to pin 1 of PT.
3. Perform the following installation procedure. When
finished, insert the connector end of RESET CABLE W2
into A17, pin 15 to complete the installation.
2-39. To install Option 003 in HP Model 5315A, proceed as follows:
Remove the AC power cord.
b. Remove the instrument top cover (MP 12) by removing the four screws accessible from
the cabinet bottom.
Remove the LEVEL/SENS and GATE TIME control knobs.
d. Remove the three screws which secure the motherboard to cabinet bottom. Remove the
handle (MP 3) and the four black spacers (MP 4) and lift the entire instrument straight
up and out.
e. Remove the front panel hex nuts on the CHANNEL A and B BNC's and the three control
hex nuts. |
f. Remove the 1/4” hex nut on the left rear side of the A2 Display Assembly. Pull
the front panel (MP6) forward until it clears the control shafts and input jacks. Note
the spacer between the front panel and A2 Assembly.
MOTE
If the old front panel has bezels installed in the holes, transfer
them to the replacement panel.
g. Remove the four screws securing the A4 Input Amplifier.
h. Remove the A3/A4 assembly by gently lifting on the rear edge of A4, until the pins come
free of motherboard connector Al J5.
i. Position the A9 C Channel assembly, component side up and protruding connector pins
toward rear of instrument, over A1 motherboard jack J6. Install by gently pressing the
row of connector pins into J6 until the assembly rests on the spacers mounted on Al.
Secure with four screws provided.
ji. Install the Special Input BNC (provided) in the INPUT C position (center) of the 5315A
replacement front panel (provided) as illustrated in Section Hil, Figure 3-12.
k. Connect the SMC connector on A9 W1 to the INPUT C BNC; loosely install the new
front panel; set the instrument into the cabinet bottom.
2-7
Mode! 5315A/B
Installation
| Perform Option 003 adjustment as described in Section Y.
m. Remove the instrument from the cabinet bottom and replace the A3/A4 Input Amplifier.
n. Position the front panel, and reinstall the CHANNEL A and B BNC and three control hex
nuts. Replace the LEVEL/SENS and GATE TIME control knobs.
0. Reinstall the instrument into the cabinet bottom and secure with three screws. Replace
the handle and four black spacers. Replace the cabinet top cover.
2-40. To install Option 003 in HP Model 5315B proceed as follows:
a. Remove the AC power cord.
b. Remove the instrument top cover (MP 12) by removing the screw which secures the
carrying handle (MP 11) at rear of instrument. Slide the cover backward until free.
Remove the gray trim strip (MP 16) from top of the instrument front frame (MP 17),
d. Remove the four screws which secure the front panel (MP 21). The front feet of the instru-
ment must be removed to access the two screws on the frame bottom.
NOTE
Steps e & f apply only to instruments with serial numbers
prefixed 1812A through 2032A. For all instruments, continue
with step g.
e. Remove the two screws which secure the support bracket, on the left side of AT mother-
board, to the instrument side frame.
f. Remove the two screws and bracket which secure the A1 power supply heat sink to the
instrument side frame,
g Remove the two screws at the rear edge of AT motherboard.
h. Disconnect the three power transformer secondary wires (BLU, BLU, WHT-BLU) from the
Al Motherboard, by pulling the push-on connectors straight up and off the test pins,
Remove the OSC OUT wire which connects 18 to AT Motherboard in the same manner.
NOTE
HP 53158 instruments with serial number 1832A00001 to 1832A00120
do not have “push on” connectors on the transformer secondary
terminals or EXT REF wires. Carefully unsolder and resolder the
wires on these instruments to complete installation,
|. Carefully pull the entire instrument straight forward, through the front frame, and clear
of the cabinet.
|. Remove the LEVEL/SENS and GATE TIME front panel control knobs,
k. Remove the front panel hex nuts on CHANNEL A and B INPUT BNC's and the three
control hex nuts.
l. Remove the 1/4” hex nut on the left side (back) of the A2 Display Assembly, and pull the
front panel (MP21) straight forward, until clear. Note the spacer between the front panel
and the A2 assembiy.
m. Remove the A3/A4 assembly by gently lifting on the rear edge of A4, until the pins come
— free of motherboard connector A1 15. |
n. Position the A9 C Channel assembly, component side up with the protruding connector
pins toward rear of instrument, over A1 motherboard jack J6. Install by gently pressing
the row of connector pins into J6 until the assembly tests on the spacers mounted on AT.
Secure with four screws provided.
Model 5315A/B
Installation
o. Install the Special Input BNC (provided) in the INPUT C position (center) of the 5315B
replacement front panel (provided) as illustrated in Section HI, Figure 3-12.
p. Connect the SMC connector on ASW1 to the INPUT C BNC, and loosely install the new
front panel. |
q. Position the cabinet and AT motherboard assembly side by side, with the cabinet facing
to the rear. Route the three power transformer secondary wires through the cabinet side
frame and reconnect to AT motherboard test pins. Ensure the wire colors match the pins
as labeled.
r. Carefully replace AC power cord, and perform Option 003 adjustment as described in
Section V.
s. Disconnect the power transformer secondary wires. Reinstall the A3/A4 Input Ampli-
fier assembly. |
t. Reinstall the instrument into the cabinet by reversing steps a through |. Be sure that the
AT motherboard fits into the board guides.
2-41. installation of Oven Oscillator Option 004 (5315A)
2-42. Option 004 consists of an oven-contained oscillator assembly (A14), which plugs into the
reference oscillator connector J2 on the motherboard. Option 004 replaces the standard oscil-
lator assembly (A13) or the TCXO assembly. To install Option 004 in the 5315A; proceed as follows:
Remove the AC power cord.
b. Remove the instrument top cover by removing the four screws accessible from the
cabinet bottom.
c, If battery pack Option 002 is installed, disconnect the 11-conductor cable assembly W4 at
the motherboard connector.
d. Remove the four spacers (MP4) and the three screws used to secure the A1 motherboard.
Two of the screws are located on either side of transformer T1 with the otherin the center
of the board.
e. Remove the two screws which secure the existing reference oscillator assembly. Remove
the assembly. |
f. Position Фе А14 oven oscillator assembly with the components facing the left side of
the instrument, Insert A14P2 into the motherboard jack (A1)2) from which the previous
assembly was removed.
g. Secure the assembly to the motherboard by installing the two screws through the
L-brackets. |
h. If battery Option 002 is also installed, add a short insulated jumper wire on the A1
motherboard at the location labeled “W1.”
i. Perform the 5315A Option 004 adjustment as described in Section V.
j. Install and secure A1 motherboard with the three screws. Replace the four spacers.
Reconnect the battery option cable (if necessary). Install and secure the top cover with
the four screws.
2-9
Model 5315A/B
Installation
2-43. installation of Oven Oscillator Option 004 (5315B)
2-44. Option 004 consists of an Oven Module Assembly (A15) with mounting bracket and an
interconnect board, which plugs into the reference oscillator connector 12 on the A1 mother-
board. This assembly replaces the standard oscillator assembly (A13) or the Option 001 TCXO
assembly (A7). To install Option 004 in the 5315B, proceed as follows:
2-10
Disconnect the 5315B power cord.
Remove the instrument top cover (MP12) by removing the carrying handle screw (MP11)
at rear of instrument. Slide the cover toward the rear until free.
Remove the bottom cover (MP8) by loosening the captive screw (at the rear edge of the
cover). Slide cover toward the rear until free.
Remove the two screws which secure the existing reference oscillator assembly. Remove
the assembly.
Position the oven module and bracket assembly with the flat surface of the bracket facing
the left side strut and the foot of the bracket over the hole near the center of the mother-
board. Guide the bracket into place against the side strut. The lower edge of the bracket
should be inserted in the space between the edge of the motherboard and the side strut,
(between the rear deck and board guide).
Secure the bracket to the side strut using three 6-32X 3/8 inch screws: secure to mother-
board using a similar screw.
Insert the interconnect board (A15A1) into connector Alj2 of the motherboard
assembly. The components should face the left side of instrument.
Secure the interconnect board by installing the two 6-32 X 1/4 inch screws through
the L-brackets.
Perform Option 004 adjustment as described in Section V.
Replace the bottom and top covers,
Model 5315A/B
Operation
SECTION III
OPERATION
3-1. INTRODUCTION
3-2. This section provides operating information for the 5315A/8 Universal Counter, Descrip-
tions of all front panel controls, connectors, and indicators as well as an operator's check, oper-
ating instructions, and operator's maintenance are provided.
3-3. OPERATING CHARACTERISTICS
3-4. The 5315A/8 is a 100 MHz and 100 ns full universal counter, capable of Frequency, Period,
Time Interval, Ratio, and Totalize type measurements. To maximize resolution, the 5315A/B uses
a reciprocal counting technique for frequencies below 10 MHz, automatically switching to
conventional frequency counting for frequencies above 10 MHz. The gate time is continuously
adjustable from 50 ms to 10 s, on the front panel. The internal microcomputer performs the
calculations, and automatically compensates for the arbitrary gate time. The display is given in
scientific notation (i.e., exponents of blank, £3, +6, or £9). The inputamplifiers are optimized for
both time interval and frequency measurements.
3-5. When the optional third input channel is installed, the (“C”) frequency range of the
counter is extended to 1 GHz. The input sensitivity can be decreased, continuously, up to 20 dB
nominally (in the range of 50 to 500 MHz} and 10 dB nominally (in the range of 500 to 1000 MHz).
3-6. MODES OF OPERATION
3-7. The 5315A/B provides ten modes of operation and two check functions. The resolution and
accuracy for each mode except A Armed by B is provided in Table 1-1. The modes of operation
are described in the following paragraphs:
FREQ A (Frequency A)
PER A (Period A)
T.I. A-B [Time Interval A (start)-to-B (stop)
T.I. AVG. A—B (Time Interval Average A-to-B)
T.1. DELAY {Holdoff)
RATIO A/B (Ratio A-to-B)
A BY B (Gated Totalize)
A-Armed-By-B Mode
FREQ C (Option 003)
TOT (Manual Totalize)
CHECK
Display Check
3-8. FREQ A (Frequency A Mode)
3-9. Frequency measurements are made by connecting a signal (up to 100 MHz) to INPUT A,
and pressing the FREQ A key (with the Blue shift key out). Select the appropriate input signal
conditioning and adjust the LEVEL/SENS control (with TRIGGER LEVEL/SENSITIVITY key to
TRIGGER LEVEL) to optimum trigger point. The optimum trigger point may be determined by
centering the LEVEL/SENS control within the triggering range, indicated by the flashing trigger
light. The GATE TIME control determines the resolution of the measurement, and may be
displayed by pressing the GATE TIME function key and Blue shift key. The gate time range when
FREQ A is pressed is 60 ms to 10's, typical. However a gate time range of 500 us to 30 ms is available
by pressing T.!. DELAY and TOT STOP/START simultaneously. When the Blue Shift key is OUT,
the 5315A/B will be in FREQ A. When the Blue Shift key is IN, the 5315A/B will be in PER À. PER À
is discussed in the following paragraph.
3-1
Mode! 5315A/B
Operation
3-2
3-10. PER A (Period A Mode)
3-11. The Period A mode allows single period measurements to be made with periods of 100,000
seconds (28 minutes) to 10.0 nanoseconds into INPUT A, Select the appropriate input signal
conditioning and Trigger Level/Sensitivity.
3-12. T.l. A—B [Time Interval A (start}-to-B (stop)] Mode
3-13. T.1.A—B measures the time interval between a START signal at INPUT A and a STOP signal
at INPUT B. If both the START and STOP signals are derived from the same signal, connect the
signal 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 allow variable triggering on either positive or
negative going slope. A single-shot time interval measurement may be made over a range of
100 nanoseconds up to 8 digits and 100,000 seconds after 9 digits.
3-14. Ti, AVG A—B (Time Interval Average A-to-B) Mode
3-15. The T.I. Average mode provides greater resolution of time interval measurements
than single-shot T.1. mode. In the T.I. AVG mode, the gate time control varies the number of
events of time intervals averaged (approximately GATE TIME X REP RATE). The resolution of
the measurement is improved by the \/N, where N is the number of time intervals averaged.
A limited range of negative T.I. measurements (i.e., B triggers before A) are possible in T.I,
AYG mode.
3-16. Inthe T.l. AVG mode, there must be at least 200 ns dead time. Dead time occurs between
the preceding time interval stop event and the current time interval start event, as shown in
Figure 3-1. This means that in T.l. AVG mode, the repetition rate must be less than 5 MHz.
START STOP START STOP
|
i ы
i
|
= Bom
T.1. MEASURED
"PERERA TR TTT TR Or et
A — SLOPE |
B + SLOPE |
DEAD TIME >200ns
Figure 3-1. T.I. Average Dead Time
Model 5315A/B
Operation
3-17. T.1. DELAY (Holdoff) Mode
3-18. The T.i. DELAY mode of operation is similar to T.i. A—B, but with the following additional
control: The front panel GATE TIME control inserts a variabie delay (from 500 us nominal to
>20 ms between the START (INPUT A) event and the enabling of the STOP (INPUT B) event.
Potential STOP events are ignored during the specified delay or holdoff. The amount of delay
time may be continuously measured and displayed by simultaneously pressing the T.I. A—B, T.1.
DELAY, and Blue shift keys. Figure 3-2 illustrates the T.I. DELAY function.
START STOP
e DESIRED T.L MEASUREMENT =
-< ACTUAL T.l, MEAS tm
|
|
|
|
|
|
STANDARD T.i. A-=B
= DESIRED T.1, MEASUREMENT B=
» ACTUAL T.i. MEAS >
os HOLDOFF >
T.i. DELAY
Figure 3-2. Timing of Time Interval Delay Mode
3-19. RATIO A/B
3-20. The RATIO A/B mode of operation measures and displays the frequency ratio of signals
on INPUT A to signals on INPUT B. The GATE TIME control determines the resolution by selecting
the number of cycles of the INPUT B signal over which the ratio A/B is measured. Increasing the
gate time (towards MAX) or increasing the frequency of INPUT B results in an increased reso-
lution of the measurement. Frequencies up to 100 MHz on both channels are allowed.
Model 5315A/B
Operation
3-21. A BY B (Gated Totalize)
3-22. A BY B (A gated by B} is a totalize mode of operation (see Figure 3-3), in which events on
INPUT A (up to 100 MHz) are counted for a duration determined by INPUT B. The gate is
“OPENED” on the slope of Input B selected by the Channel A Slope switch, and “CLOSED” on
the slope of Input B selected by the Channel B Slope switch. This allows any one of four discrete
gate durations from a given signal on Input B. The Channel A slope switch also determines which
slope of the events signal is counted on INPUT A. A BY Bis a single-shot mode of operation.
The RESET button must be pressed to clear the display and allow the initiation of a
new measurement.
GATE BEGINS ON THE | GATE ENDS ON THE SLOPE
SLOPE SELECTED BY SELECTED BY SLOPE B —..—
SLOPE A—_ | Lu
Tee i : ще
Ala ——.. GATE OPENED — ея
:
СОР р
но sf 10 Stores 7 POSITIVE TRANSITIONS COUNTED
| : WHEN SLOPE A IS AT A
| (3 EVENTS COUNTED)
SLOPE A y | jo Bm
r
SLOPE A = | [О] SLOPE 8.7%
———— NEGATIVE TRANSITIONS COUNTED
: | WHEN SLOPE AIS ATX
o } 14 EVENTS COUNTED)
SLOPE A = _ [store ca
В В
|
| |
INPUT A | |
|
|
|
INPUT B
Figure 3-3. Timing of Totalize A by B Mode
3-23, A-ARMED-BY-B Mode
3-24. The 5315 has a measurement function, frequency-A-Armed-By-B, Averaged, for
frequency averaging. Called “A ARMED BY B”, this function allows the 5315 to average
together multiple frequency measurements. To do this, a sa mpling signal synchronized with and
of pulse width less than the signal bursts must be applied to the Channel B input. This signal
performs two functions: one, it tells the 5315 when to count the incoming bursts and
when to ignore the dead time between bursts; and two, it opens the 5375 gate. The
measurement interval is set from the front panels and its length determines the number of bursts
to be averaged. Figure 3-4 shows an example of function A-Armed-By-B. In this example, 1 MHz
bursts, 10 us wide, at a 10 kHz repetition rate are applied to Channel A input. A sampling signal of
equal repetition rate and shorter pulse width is applied to Channel B. This sampling signal must
be synchronized with the Channel A frequency burst signal. When the first burst occurs, the
sampling signal at Channel B opens the gate, and tells the 5315 to begin counting the events at
Channel A. When the sampling signal disappears, the 5315 stops counting the events at
Channel A. If the gate is still open and another burst occurs, the 5315 will add these “new”
events to the previous events counted. This will continue until the measurement interval
runs out. On the next sampling pulse, after the gate closes, the 5315 will compute the average
frequency of the signal during the burst (in this example 1 MHz). A final sampling pulse must
occur after the measurement interval ends to terminate the measurement. The events that
occurred during this final pulse are not averaged in the displayed amount.
Model 5315A/B
Operation
CHANNEL À
SIGNAL
CHANNEL B | | |
SAMPLING
SIGNAL
MEASUREMENT | ee
INTERVAL SELECTED INTERVAL \
HAS ENDED
THIS PULSE REQUIRED TO
TERMINATE MEASUREMENT
SIGNAL PARAMETERS: 1 Miz, 10 us Wide, 10 kh +z Rate
Figure 3-4. A ARMED BY B
3-25. The length of the measurement interval and signal repetition rate determine how many
bursts will be averaged. Faster burst repetition rates allow shorter measurement intervals for a
given number of averages. The main limit is that no more than 100 million “events” can be
counted (either input signal cycles or time base counts). In the case of Figure 3-4, each burst
contains 10 “events”, with 10 thousand occurring in 1 second for 100 thousand “events” per
second. Since 100 million events is the limit, the 5315 could average for 1000 seconds before
the events counter would overflow. And, since the measurement interval determines the
number of averages, a 1000-second measurement interval would be necessary before the events
count or time base count would overflow. This, of course, is longer than that obtainable from the
5315 {maximum measurement interval of about 10 seconds). A specific case where the 5315
would overflow would be a 50 MHz signal pulsed for 200 ns at a 2 MHz rate. in this case 10
“events” occur during each burst, with 2 million bursts per second, or 20 million “events” in
1-second. So, the 5315 would overflow in 5 seconds, thus the gate time must be less than
5 seconds, and 10 million bursts would be averaged. If the 100 million events limit is exceeded
the displayed answer will be inaccurate.
3-26. A ARMED BY B has two modes (two different measurement interval ranges) and is not
labeled on the front panel. For a measurement interval range of 500 us-30 ms, press T.1. DELAY
and RATIO A/B together. The measurement interval may be displayed by selecting the GATE
TIME mode for the LONG interval or by pressing T.I. А-В, Т1. DELAY, and Blue Shift key
simultaneously for the SHORT interval. For a measurement interval range of 60 ms to 10 seconds,
press FREQ A and TOT STOP together. The Channel A Trigger Slope is set by the front panel
Channel A Slope switch. The sampling signal enable slope (begin counting) is determined by the
Blue Shift key. In the OUT position the counting will be enabled on the sampling signal positive
slope. In the IN position, the counting will be enabled on the sampling signal negative slope. The
gate will also be opened on the same slope as determined by the Blue Shift key. The disable slope
is determined by the Channel B front pane! slope switch. The measurementinterval is controlled,
as normal, by the front panel GATE TIME control. The gate will close once the selected time has
passed. There is no problem if the gate should close in the middle of counting a burst. The
following limits do exist in this mode:
1. 200 ns minimum dead time between bursts,
2. 100 ns minimum burst width.
3. The enable slope can only be negative when using the short measurement interval
(500 us-30 ms).
Resolution increases with the square root of the number of samples averaged, N.
(10-7) X (INPUT FREQ)
(Sampling Signal Width) X (\/N)
Measurement Interval
Gate signal repetition rate
Resolution ~ Hz
N —
Model 5315A/B
Operation
3-6
From Figure 3-4, the sampling signal is 10 us wide at a 10 kHz repetition rate with a measurement
interval of 1-second. With a single-shot measurement:
100 X 10-9 X 1 x 106
10 X 10-6 v1
but with average N = 10000 (1 second measurement interval):
100 x 10-9 106
Ue xX rT
10x10-8 \/ 10000
Accuracy: The actual measurement interval is shorter than the correct value by about
1 nanosecond. With short sample pulse widths and large N values the displayed answer will not
be perfectly accurate:
resolution = = 104 or 10 kHz resolution
resolution = = 100 Hz (100 times better)
10-9
measurement interval
Ultimate accuracy = X {Input FREQ);
With a 10 us sample pulse width, accuracy can be as good as 100 Hz if enough events are averaged.
3-27. FREQ C (Frequency C Mode, Option 003)
3-28. To make a frequency measurement on a CW signal in the range of 50 MHz to 1 GHz, select
FREQ C function and connect the signal to INPUT C.
NOTE
It the amplitude of the signal exceeds the 1V rms dynamic range,
the measurement may be incorrect.
Set the GATE TIME control to MIN (but not hold). Set the SENS C control to MIN. Slowly move the
SENS C control in a clockwise direction (toward MAX) until the counter begins to gate. This
represents the optimum trigger sensitivity. To increase the displayed resolution, move the GATE
TIME control toward MAX. Pressing either slope switch will reset the counter.
NOTE
The Trigger Lights for INPUT A and INPUT B are inoperative and
extinguished when functions FREQ C or GATE TIME are selected.
This is normal. However, pressing either Channel A or B Slope
switches will reset the counter,
3-28. TOT STOP/START (Totalize Start-Stop Mode)
3-30. Totalize STOP/START is a manually gated, totalize mode of operation. Pressing the blue
shift key (IN position) opens the main gate, allowing INPUT A events to be counted. Pressing the
shift key again (OUT position) closes the gate, stopping the count. The countis continuously dis-
played, and cumulative from gate cycle to gate cycle. The RESET button clears the counter and
resets the display to zero.
3-31, CHECK (Mode)
3-32. The Check mode applies 10 MHz from the internal (or external for 5315B) reference
“oscillator to the MRC. It is used to verify the basic operation of the counter, GATE lightand GATE
TIME control,
Model 5315A/8
Operation
3-33. Display Check (Mode)
3-34. The Display Check mode is unlabeled; it cycles the display through a routine that exercises all
digits and most annunciators. With the POWER switch to ON, and all function switches to the “OUT”
position, a rolling display, corresponding to Table 3-7, will result.
Table 3-1, Display Check
All Displays OVFL | ERROR | — GATE dp1 | dp2 | dp3
o
{1
>
3-35. FRONT AND REAR PANEL FEATURES AND CONTROLS
3-36. The following paragraphs describe the features and controls of the function selection,
signal conditioning, and display sections of the front panel. Front and rear panel controls are
individually located and described in Figures 3-7 and 3-8).
NOTE
Except RESET all front panel key switches “latch” in and stay
when pushed. A second push releases latched keys. The six keys
between RESET and the blue “shift” key are interconnected so
that pushing one will release another latched key.
3-37. FUNCTION SELECTION CONTROLS
3-38. The function (mode) selection section of the front panel contains the POWER (Stby/On),
Reset keys, Function Mode keys group (within the border outline), and Gate Time/ Delay control.
3-39. The POWER key sets the 5315A/38 either to ON or STBY (Standby). In the ON position (in)
power is supplied to entire instrument. In the STBY position (OUT) unregulated DC is supplied
only to battery-pack charging circuits (Option 002). The RESET key clears and updates the display
for continuous measurement modes, and resets the counter in totalize modes.
3-40. Each of the keys within the outlined function group can select one of two functions:
With the blue nift key in the “OUT” position, the other six keys select the function
labeled above (i.e., FREQ A, T.1. A—B, etc.}. With the shift key in the “IN” position, the keys select
the function labeled in blue below (i.e., PER A, T.!. AVG A—B, etc.).
3-7
Model 5315A/B
Operation
3-8
3-41. The GATE TIME/DELAY control determines the amount of gate time per measurement,
and it is continuously adjustable over a range of 50 ms to 10 seconds. The selected gate time may
be displayed by pressing the GATE TIME function key, and the blue shift key. In the T.I. DELAY
mode of operation the control determines the amount of time the Start Channel is held off or
“delayed” (see paragraph 3-17). The amount of “delay” may be displayed by pressing the 1.1.
A—B, T.I. DELAY, and blue shift key simultaneously. In the T.I. A-B mode of operation, the GATE
TIME/DELAY control determines the sample rate.
3-42. SIGNAL CONDITIONING CONTROLS
3-43. A tull complement of signal conditioning controls are provided for each channel (A and B)
input (see Figure 3-6). These controls allow the selection of Attenuation (X1,X20), Slope {positive
or negative) and input coupling (AC or DC). The SEP/COM A switch allows the selection of
separate Channel A and B inputs in the SEP position. The COM A position disconnects the Chan-
nel B Input BNC, and connects both Channel A and Channel B input amplifiers to the Chan-
nel A input.
3-44. A low pass filter for Channel A input is provided. With the FILTER NORM key “in”
frequencies above 100 kHz are effectively attenuated. With the FILTER NORM key “out”
there is no filtering.
3-45. TRIGGER LEVEL/SENSITIVITY CONTROLS
3-46. The Trigger Level/Sensitivity controls provided for each channel operate as follows: With
the TRIGGER LEVEL/SENSITIVITY key “out”, the LEVEL/SENS control adjusts the trigger level
(over a range of £2.5 volts DCin ATTN X1, or £50 volt DC in ATTN X20). With the TRIGGER LEVEL/
SENSITIVITY key “in”, the LEVEL/SENS control adjusts the input sensitivity from MAX (10 mV
up to 10 MHz, 25 mV up to 100 MHz) with control fully clockwise to MIN (greater than 500 mV)
with control fully counterclockwise (see Figure 3-5).
Trigger Level adjustable
À TRIGGER over + 2.5 volts with
* 2.5V LEVEL sensitivity constant
Li
_ Xf \ / at MAX
SENSITIVITY MAX- CY \ /
= 10 ту NA NA -2.5V
MIN > 500 ту
Sensitivity adjustable from
MAX TE | ; \ ; 4 7 = 10 mV 10 > 500 mV
= 10 mV 5 ро 3 1 ; with Trigger Level constant
$ f y y at O volts
Figure 3-5. Trigger Level/Sensitivity Controls
Model 5315A/B
Operation
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3-9
Figure 3-6, 5315A/B Front End Block Diagram
Model 5315A/B
Operation
POWER
ESTEY RE
Lo.
RATIO FREQ TOT
SET
A GATE Tor
TIME START
STBY/ON. Supplies power to entire counter in the ON position. Supplies power:
to the Battery-Pack (Option 002) in the STBY (Standby) position, and to Option 004
for crystal oven power.
RESET. Clears and updates display in continuous measurement modes, resets counter
to zero in totalize modes,
FREQ A. Selects Frequency modes of operation (with SHIFT key out), for signals on In-
put A.
PER A , Selects Period mode of operation (with SHIFT key in), for signal on Input A.
NOTE
This switch, when depressed (IN), maintains oven in standby mode. The
switch only operates this way with the battery (Option 002) and oven
reference oscillator (Option 004) installed.
Lh A—B. Selects Time interval mode of operation (with SHIFT key out) measuring
time differences from Start signal on INPUT A to Stop signal on INPUT B (when in
SEP).
Ti. AVG A—B. Selects Time Interval Average mode of operation {with SHIFT key
in), measuring time difference from Start signal on INPUT A to Stop signal on INPUT
B (when in SEP).
T.l. DELAY. Selects Time interval mode of operation (with SHIFT key out), measuring
time differences from Start signal on INPUT A to Stop signal on INPUT B (when in SEP),
with the triggering of the Stop signal DELAYED (held off} for a period of time deter-
mined by GATE TIME DELAY control.
CHECK , Applies 10 MHz from reference oscillator to MRC (with SHIFT key inj, to verify
operation of MRC, display and GATE TIME control, microcomputer, etc.
RATIO A/B. Selects Ratio mode of operation (with SHIFT key out), measuring the ratio
of the signal frequency at INPUT A to the signal frequency at INPUT B.
A BY B. Selects a “gated” totalize mode of operation (with SHIFT key in), in which the
signal frequency of INPUT A is totalized for a gate duration determined by the signal
on INPUT B.
FREQ C. Enables the Frequency C INPUT (Option 003) module (with the SHIFT key out).
GATE TIME, Continuously measures and displays the gate time determined by the GATE
TIME control (with SHIFT key in),
Figure 3-7. Front Panel Features
Model 5315A/B
Operation
THIGGER .
; LEVEL So
+. SENSITIVITY
FILTER
POWER "RE Ti TE BATIO FREGO TOT +
ASTBY RESET 7 A-—8 HERE А/В STOP AL
A GATE TOT Aa
1Y 5 TIME START 4
Su я an
e aj
NOTE
The trigger lights are disabled and extinguished when either FREQ € C
or GATE TIME is selected,
TOT, STOP/START. Selects Totalize mode of operation, manually controlled by the
SHIFT key. With the SHIFT key in, totalizing of signal frequency on INPUT A starts. With
the SHIFT key out, totalized accumulation stops and holds. RESET must be pressed to zero
the display.
SHIFT. Used in conjunction with six dual purpose function keys 3, 4, 5, 6, 7, 8)
to select the function labeled above or below the key. With the SHIFT key out, func-
tions labeled above the keys are enabled. With the SHIFT key in, functions labeled
below the keys are enabled,
GATE TIME/DELAY, For FREQUENCY, PERIOD, RATIO AND T.i. AVERAGE modes,
provides continuously variable measurement time from, nominaliy, 50 ms to 10 s (mini-
mum = 1 period of the input signal). For T.l. mode, varies the time between measure-
ments, For T.l. DELAY mode, provides continuously variable delay time between START
and STOP enable.
HOLD. Single measurement with minimum gate time, Requires pushing RESET key to
initiate new measurement,
AC/DC. Selects AC or DC coupling for corresponding input signal except in the
COM A mode. In the COM A mode, Channel A determines coupling.
INPUT A, B. Input BNC’s for channels A and B.
ATTN, X1/X20. Selects attenuation of signal on corresponding input channels. X1 position
connects input signal directly to input amplifiers; X20 position attenuates input signal by
a factor of 20 (nominal).
FILTER, NORM/100 kHz, Inserts a low pass filter configuration into the INPUT A
channel, attenuating frequencies above 100 kHz,
SEP/COM A. Input amplifier control, selects independent operation of Inputs A and Bin.
| SEP (separate) position. in COM A (Common A) position, the signal at Input À is also
В applied to три! В, with the B input BNC disconnected from input circuitry. Input B
| coupling is the same as Input A.
Figure 3-7. Front Panel Features (Continued)
3-11
Model 5315A/B
Operation
FT NETA in
53154 UNIVERSAL \Cour
FRED
TI AVG CHECK ` ToT
START
PRES EE NET ая
SLOPE. Selects triggering on either positive £ or negative t. slope ofthe corresponding
input channel.
LEVEL/SENS, When in TRIGGER LEVEL, controls the voltage at which CHANNEL A input
will trigger, variable over +2.5 volt X ATTN setting. When in SENSITIVITY, varies the
sensitivity from MAX (=10 mV) up to 500 mV. In FREQ C, controls the input sensitivity for
INPUT C from MAX (=15 mV up to 650 MHz, 75 mV up to T GHz) up to MIN (20 dB
NOMINAL),
LEVEL/SENS, When in TRIGGER LEVEL, controls the voltage at which CHANNEL
B input will trigger, variable over +25 volt X ATTN setting. When in SENSITIVITY,
varies the sensitivity from MAX (=10 mV) up to 500 mV.
TRIGGER LEYEL/SENSITIVITY, Sets the function of corresponding LEVEL/ SENS control to
either Trigger Level or Sensitivity mode. In TRIGGER LEVEL mode, sensitivity is preset to
maximum. In SENSITIVITY mode, trigger level is preset to 0 volts,
TRIGGER LIGHT. 3-state trigger lights: blinks when channel is triggering; OFF when input
signal is below trigger level setting; ON when input signal is above trigger level setting.
GATE, Gate light (when ON), indicates the counters main gate is open and a measure-
ment is in progress.
Hz, Hz (Hertz) annunciator, indicates displayed data is in frequency domain, in units of
Hertz.
$. $ (seconds) annunciator, indicates displayed data is in time domain, in units of seconds.
EXPONENT. Displays the value of the exponent of the measurement. Measu rements are
displayed in engineering notation, with exponents of blank (8), +3, +6, +9,
EXPONENT SIGN. Indicates the polarity of the displayed exponent; ON (-} if negative,
- OFF if positive.
DISPLAY. Eight-digit red LED display.
OVEL. OVFL (Overflow) annunciator, indicates that one or more of the most significant
digits are not displayed.
ERROR. Lights and remains lit when an error is detected during power-up.
DISCHG. Indicates instrument or reference oscillator oven is under battery operation;
flashes when charge level is critically low and counter is disabled.
CHGD. Indicates the operating status of the charging circuits on Option 002.
3-12
Figure 3-7. Front Panel Features (Continued)
Model 5315A/B
Operation
ÖUTBUTANPUT 1
eur ony wren
AC power input module permits operation from 100, 120, 220, or 240 volts AC. The number
visible in the window indicates nominal line voltage to which instrument must be connect-
ed (see Figure 2-2). Protective grounding conductor connects to the instrument through
this module.
| WARNING |
ANY INTERRUPTION OF THE PROTECTIVE (GROUNDING) CONDUC-
TOR INSIDE OR OUTSIDE THE INSTRUMENT OR DISCONNECTING
OF THE PROTECTIVE EARTH TERMINAL 15 LIKELY TO MAKE THE
INSTRUMENT DANGEROUS, (See Section il.)
REFERENCE OUTPUT/INPUT jack (18). Allows 5315B (only) to be operated with an exter-
nal frequency standard of 10 MHz with drive of 7 volt rms across 5000, when INT/EXT
switch A153 (located on Al Motherboard) is in the EXT position, With A183 in INT,
the internal 10 MHz standard operates the counter, and is output for external use through J6.
Figure 3-8. 5315B Rear Panel Features
Model 5315A/B
Operation
3-47. DISPLAY
3-48. The 5315A/B counter display has nine, seven-bar LED’s, providing eight digits of
resolution and a one-digit exponent. All measurements are displayed in scientific notation
(.e., exponents of blank, +3, +6, or +9) with automatic decimal point location. Annunciators
for indicating the measurement units Hz, for Hertz, and s, for seconds are provided. The
OVFL annunciator indicates that the left-most significant digits have overflowed the displayed. The
GATE annunciator indicates the counter has been triggered and a measurement is in progress.
The ERROR annunciator indicates a failure during power-up self-check. Battery annunciators
DISCHG and CHG (on Models 5315A only) are active only when Option 002 is installed,
3-49. OPERATING INSTRUCTIONS
| WARNING |
BEFORE THE INSTRUMENT IS SWITCHED ON, ALL PROTECTIVE
EARTH TERMINALS, EXTENSION CORDS, AUTOTRANS-
FORMERS, AND DEVICES CONNECTED TO IT SHOULD BE
CONNECTED TO A PROTECTIVE EARTH GROUNDED SOCKET.
ANY INTERRUPTION OF THE PROTECTIVE EARTH GROUND-
ING WILL CAUSE A POTENTIAL SHOCK HAZARD THAT
COULD RESULT IN PERSONAL INJURY,
| WARNING Y
ONLY FUSES WITH THE REQUIRED RATED CURRENT AND
SPECIFIED TYPE SHOULD BE USED. DO NOT USE REPAIRED
FUSES OR SHORT CIRCUITED FUSE-HOLDERS. TO DO SO
COULD CAUSE A SHOCK OR FIRE HAZARD.
CAUTION
Before the instrument is turned on, it must be set to the voltage
of the power source, or damage to the instrument could result.
3-50. OPERATOR’S CHECKS
3-51. А procedure for verifying the basic operation of the 5315A/B is provided in Figure 3-9.
This check utilizes the instrument self-calibration cycle and visual verification of front panel
controls by front panel indicators. No additional equipment is required.
NOTE
This check is not intended to verify the accuracy or performance
specifications of the instrument.
Model 5315A/B
Operation
3-52. POWER-UP SELF CHECK
3-53. When the 5315A/B is turned on, a power-up reset and self-check cycle is automatically
initiated. This is approximately a 2-second cycle, indicated by the following display:
3-54. During this cycle, the microcomputer performs a check sum of the internal program in
ROM and a bit pattern written into RAM. Additionally, a partial check of the MRC and I/O ports
is performed. Any failure during the cycle will produce anumbered error message, momentarily
displayed, and will latch the ERROR annunciator ON. Refer to Error Messages, paragraph 3-55.
NOTE
During the power-up self-check routine the ERROR state is
undefined. Therefore, the ERROR annunciator may or may not
be lit,
3-55. ERROR MESSAGES
3-56, Failures during the power-up self-check routine will result in a (momentary) display of a
numbered error message. In addition, the ERROR annunciator will light and remain lit until
the error is cleared and the instrument restarted. There are three numbered Error Messages:
ERROR MESSAGE
El rasen Possible Failure in Microcomputer
7 AS Possible Failure in 1/0 Ports
E3 rede ee uen 0 000 Possible Failure in MRC or No Oscillator Signal
3-57, 1f the ERROR annunciator is lit, verify the error number (1, 2, or 3) by repeating the power-
up self-check, and refer to Section VII, Troubleshooting. Power-up self-check is initiated when
the POWER switch is changed from STBY to ON.
Model 5315A/B
Operation
Sms
Anni Ta ee
О
FILTER
NORM
vas POWER ME =] pe 5 р
ASTBY RESET HEY hs aa =
GATE
AB BY E TEME START
aa 3
EE er Heed я
EE
CAUTION
Before switching on the instrument, ensure that the power transformer
primary is matched to the available line voltage, the correct fuse is in-
stalied and the safety precautions are taken. Refer to Power Require-
ments, Line Voltage Selection, Power Cables, and associated warnings
and cautions in Section I of this manual.
1. Press FREQ A/ FER A switch O. and adjust LEVEL/ SENS controls
other switches to the OUT position.
EY fully cow. Set all
2. Adjust GATE TIME control @fi} to minimum.
3, Set POWER switch © to the ON position and observe the power-up self-check. Verify all seg-
ments of the display; decimal point after MSD; and the OVFL, Hz, S, and GATE annunciators
light momentarily, followed by a display of 900. The ERROR annunciator may or may not
light. Verify both trigger lights are lit.
NOTE
When the instrument is first turned on, the microcomputer performs a
selí-check. If, during power-up self-check, an error is detected, a
numbered error message will flash momentarily and the Error annunci-
ator ED will lightand remain lit. Verify the error number by repeating
power-up self-check and refer to paragraph 3-59 Error Messages.
4. Verify Display Check routine by placing all function select switches in the QUT position. This
may be accomplished by pressing any gray multi-function switch partially in, thereby
releasing the function switch that is locked in. Observe the cycling of the display from all
zero's to all one's, two's, three's ....etc., to all blank. Refer to paragraph 3-33.
NOTE
The Display Check routine is an unlabeled function, used to verify the
operation, digits and most annunciators within the Display assembly,
Figure 3-9. Operator's Check
Model 5315A/B
Operation
3-58. MEASUREMENT PROCEDURES
3-59. Figures 3-13 through 3-27 show general operating procedures with the HP Model 5315A/B
Universal Counter in typical measurement setups. Description numbers match the locator
illustrations. The following paragraphs provide recommended operating guidelines to assist in
making the most accurate measurement possible.
3-60. Frequency, Period, and Ratio Measurements
1. For cw sine wave or symmetrical waveforms (triangle, square, etc.) use AC coupling and
the sensitivity mode.
2. For asymmetrical waveforms {pulse trains, TTL, ECL signals, ramps, etc.) use a combina-
| tion of DC coupling, Trigger Level, and fixed attenuator. AC coupling these types of sig-
_— | nals tends to distort them slightly, due to the charging of the capacitor. More important,
the position of the signal on the zero preset trigger level is determined by the average
DC level of the input. Depending on the pulse width and duty cycle, this DC average may
be low enough to allow the base line noise to trigger the counter, producing extra
counts (see Figure 3-10.) DC coupling fixes the DC level of the input signal, which
allows the adjustable Trigger Level to be positioned at the optimum point. Set the Trigger
Level control to the approximate center of the triggering range indicated by the trigger
— light (see Figure 3-71),
- J HYSTERESIS BAND
PAM 7
Figure 3-11. DC Coupled Measurements
3. When input loading is a problem (i.e., 1 MÁ load or cable capacitance} or when a more
convenient method of probing is desirable, use a 10:1 Scope Probe. A probe is recom-
mended for all logic applications.
4. For sine wave measurements 100 kHz and below, always use the low pass filter,
selectable on the front panel. Normally the input signal is integrated over the entire
100 MHz bandwidth. Use of the filter effectively removes noise and harmonics (above
100 kHz) that may affect the correct measurement.
WHEN MEASURING POWER LINE FREQUENCIES, BE EX-
TREMELY CAREFUL AND ALWAYS USE A STEP-DOWN ISOLA
TION TRANSFORMER (WITH ABOUT 10V OUTPUT). THE
COUNTERS PANEL 18 TYPICALLY AT SIGNAL GROUND, SO
NEVER TRY TO MEASURE THE 50 OR 60 Hz LINE WITHOUT
AN ISOLATION TRANSFORMER.
5. Be very careful with input levels at higher frequencies (greater than 5 MHz). The counter
front end can withstand only 6 volts rms at these frequencies.
3-17
Model 5315A/B
Operation
3-18
3-61. Time Interval Measurements
1. To ensure waveform fidelity during T.I. measurements, always use DC coupling.
2. Measurements of pulse width, and time between pulses, are more conveniently made in
the COM A (common) position. ;
3. Measuring extremely fast rise times is not recommended because of the difficulty of
setting precise trigger levels,
4. El, Average measurements of synchronous frequencies {any 10 MHz, or harmonic of,
with stability similar or better than the internal clock) are not recommended because of a
possible lock-up condition.
5. In general, use the GATE TIME control to vary the amount of resolution displayed. This
control does not affect accuracy. It basically trades off longer measurement time for
more resolution.
3-62. OPTIONS
3-03. The operating characteristics of the 5315A/B are affected by the addition of any of the
options described in the following paragraphs. Only one time base (Option 001 or 004) can be
used in an instrument. The time base option replaces the standard time base,
3-64. Temperature Compensated Time Base OPTION 001
3-65. Option 001 provides a temperature-compensated-crystal-oscillator (TCXO) providing
higher accuracy than the Standard Time base. The TCXO is a 10 MHz oscillator, capable of making
minor frequency corrections to compensate for offsets due to temperature variations.
3-66. Battery and Charger OPTION 002
3-67. Option 002 provides for battery operation of HP Model 5315A. The option includes the
dattery, and circuitry required for recharging. The operation of the battery charger circuitry is
monitored by front panel BATTERY indicators. See paragraph 8-79 for a complete description
of battery operation and indicators. This option is available for Mode! 5315A only,
3-68. C Channel OPTION 903
3-69. Option 003 extends the frequency counting range of the 5315A/B from 100 MHz (in
Channel A to 1 GHz (in Channel С). The input sensitivity and gate time are adjustable by front
panel controls. See Table 1-1 for complete specifications of Option 003.
3-70. Oven Contained Time Base OPTION 004
3-71. Option 004 is an oven stabilized oscillator for the 5315A/B which results in greater
measurement accuracy. The oven oscillator generates a higher stability 10 MHz signal over the
full operating temperature range than achieved by a standard or Option 001 time base.
3-72, The 5315A Option 004 consumes less power than the 5315B Option 004 and is compatible
with battery operation. The 53158 Option 004, however, offers the greatest accuracy. Option 004
is available only for HP Models 5315A/B having serial numbers prefixed 2120A and above.
Model 5315A/B
Operation
3-73. Offset/Normalizer OPTION 006
3-74. Option 006 allows the operator to mathematicaliy manipulate the 5315B dispiay. Option
006 is described in ¡ts own installation and service manual, HP Part Number 05315-90011, This
option is available for Model 5315B only.
3-75. OPERATOR’S MAINTENANCE
3-76. The only maintenance the operator should normally perform is the replacement of the
primary power fuse on a standard 5315B. This fuse is located within the Line Module Assembly.
For instructions on changing the fuse, refer to Section Il, Line Voltage Selection,
Nl at Nat o ll gg gy Fel
§ CAUTION $
Make sure that only fuses with the required rated current and
of the slow-blow type are used for replacement. The use of re-
paired fuses and the short-circuiting of fuse-holders must
be avoided.
3-77. When Option 003 C Channel is installed, the operator may be required to replace the
input BNC fuse. This is a 1/8A fuse (HP Part No. 2110-0301) which is located within the INPUT C
BNC connector {see Figure 3-12. for details). To replace the fuse, disconnect the power cord,
unscrew the special BNC barrel (P/N 05305-60205) and, with needle-nose pliers, remove and
replace the fuse. Reinstall the BNC barrel, and tighten using a BNC cable connector. Be careful
not to overtighten.
7
HEX NUT
/ 0690-0038
SPECIAL LOCKWASHER
05305-60205 2190-0124
PANEL |
MINI-CONNECTOR
|| 2110-0301 | N |
- т |
“J PANEL NI-CONNEC
TEFLON INSULATOR
05305-20105
Figure 3-12. Details of Input Connector [1 and Fuse Mounting
3-19
Model 5315A/B
Operation
3-20
3-78. POWER/WARM UP
3-79. The HP Model 5315A/B requires a power source of 100, 120, 220, or 240V AC, +5%, -1 0%,
48 to 66 Hz single phase. The selection of line voltage and input power fuse is described in
Section II, paragraph 2-5, Preparation for Use.
3-80. The 5315A/B has a two-position power switch, STBY and ON. For 5315A models with
Option 002, it is important that the instrument remain connected to the power source in the
STBY mode when not in use. This supplies power to the battery charging circuitry.
| WARNING |
POWER 15 ALWAYS PRESENT AT THE STBY/ON (LINE) SWITCH
AND TRANSFORMER, AND UNREGULATED DC IS PRESENT
WHENEVER THE LINE CORD IS ATTACHED. UNPLUGGING THE
POWER CORD IS NECESSARY TO REMOVE ALL POWER FROM
THE INSTRUMENT, ВЕ
3-81. The Option 004 time base oven is supplied power whenever line (Mains) power is
connected to the instrument. For a 5315A with both Options 002 and 004 installed, the oven
receives standby power from the battery when the FREQ A/PER A switch is depressed.
Model 53154/B
Operation
Er
POWER | ЕВЕ 14
BESTBY RESET
A 6 N m
5315A UNIVERSAL
RATIO FREG
A-- E SPA AE
NOTE
For specifications concerning bandwidth, accuracy, and amplitude on
input signals, refer to Table 1-1.
to the ON position.
Set POWER switch @B
Set SEP/COM À switch
Connect the input signal to INPUT A jack §73
Press FREQ A/ PER A switch GB, and set the Blue SHIFT key @B in the out position for FREQ
A, or the in position for Period А.
4 to SEP position.
switches to appropriate positions.
} to SENSITI VIT Y position, and LEVEL/ SENS control
Adjust the LEVEL/ SENS control
Adjust the GATE TIME control dl > 3
pressing the GATE TIME switch MB and the Blue SHIFT key €
Жо
pa
Renton Mesta
0 ng .
A
Sins
1 В
pai so.
Figure 3-13. Frequency A/Period A Measurements
Model 5315A/B
Operation
SHIFT key £3
Ar ао ОИСОаа Е Ред ro
ne
GATE
NORM
TI RG CHECK Е TOT
А - E 5 START
NOTE
For specifications concerning bandwidth, accuracy, and amplitude on
input signals, refer to Table 1-7.
‚If the Start and Stop signals are from separate sources, connect the Start signal to INPUT A
O
jack 47 , the Stop signal to INPUT B jack @ , and set the SEP/COM A switch 15. to SEP
position. If the Start and Stop signals are from a common source, connect to INPUT A jack £03
and set the SEP/COM A switch 48} to COM A position.
Press T.I, A—B switch @B
time interval function.
Set AC/DC 1
, and Slope
NOTE
When the SEP/COM A switch is set to COMA, only the CHANNEL A
AC/DC switch EP is effective. However, all Attenuator, Slope, and
LEVEL/ SENS controls are effective.
switches to desired positions.
Set TRIGGER LEVEL/SENSITIVITY switches €28 GB to TRIGGER LEVEL position, This sets the
sensitivity to maximum (typically <10 mV for frequencies <10 MHz) and allows variable selection
of trigger levels,
Adjust the LEVEL/SENS controls €
over which the trigger light flashes.
Adjust the GATE TIME control (3 for the desired sample rate, variable nominally from 50 ms to
10's. The selected gate time may be displayed by pressing the GATE TIME switch CD and the Blue
y for optimum triggering, usually the middle of the range
NOTE
The first measurement is not displayed until the gate time delay is up.
For slow sample rates, use HOLD and the RESET switch,
3-22
Figure 3-14. Time Interval Measurement
Model 5315A/8
Operation
POWER TI RATIO FREQ TOT
RBSTBY RESET FE
5315A UNIVERSAL COUNTER
ATTN FILTER
AA AC x1 A SEP
GATE TOT
TIME START
NOTE
For specifications concerning bandwidth, accuracy, and amplitude on
input signals, refer to Table 1-1,
Set POWER switch o to the ON position.
if © and Stop signals are from separate sources, connect the Start signal a A
, and Slope
NOTE
When the O A switch is set to COM A, only Channel A
27 Lay to TRIGGER LEVEL position. This sets the
sensitivity to maximum ‘ура = <10 mV) and allows variable selection of trigger levels.
500 us to 20 ms) between the Start on Channel A and the enabling of Stop on Channel B. Inputs
during the delay time are ignored. The selected delay time may be displayed by pressing
ED, T.I. DELAY O and Blue SHIFT key € to their in positions.
Figure 3-15. Time Interval Delay Measurement
3-23
Model 5315A/B
Operation
5315A UNIVERSAL COUNTER
TRIGGER LEVELS :
K Lever / =
г
POWER tt RATIO FREQ TOY &
JLSTEY RESET AB e A/B с STOP HL
PER TAYE CHECK A GATE TOT .
! -= В ВУ В AIME START
а cu E ipa A si В НЕЕ аи A E A ro siti pe en E són e. ras ie sui mie
a SE ue uu. 3 Le HE e METE A LE TT
100k Hz CO OM À
FUSE
NOTE
For specifications concerning bandwidth, accuracy, and amplitude on
input signals, refer to Table 7-1.
1. Set POWER switch O to the ON position.
NOTE
There must be at least 200 ns between the Stop pulse and the next Start
pulse, When measuring the time interval between the same polarity
slope of two pulses from a single source, the PER A mode should
be used.
2. If the Start and Stop signals are from separate sources, connect the Start signal to INPUT A
jack 64, the Stop signal to INPUT B jack €), and set the SEP/COM A switch €
position. if the Start and Stop signals are from. à common source, connect to INPUT À jack € {i
NOTE
When the SEP/COM A switch is set to COM A, only the Channel A
AC/DC switch # is effective. However, all ATTENUATOR, SLOPE, and
LEVEL/SENS controls are effective.
5. Set TRIGGER LEVEL/SENSITIVITY switches € @2 to TRIGGER LEVEL position. This sets the
sensitivity to maximum (<10 mV) and allows variable selection of trigger levels.
6. Adjust the LEVEL/SENS controls die
over which the trigger light flashes).
7. Adjust the GATE TIME control €) for the desired resolution. The selected gate time may
be displayed by setting the GATE TIME switch MB and the Blue SHIFT key 4 Cl Во the
“in” position.
E for optimum triggering (i.e., the middie of the range
NOTE
The T.l. Average A-B mode of operation will measure time intervals
from 105 seconds down to $ ns, with up to 1 ns resolution. À display
of up to “-" 1 or 2 ns, indicating a negative time interval is possible
(i.e., Channel B event occurred before Channel A event).
SENT
Figure 3-16, Time Interval Average A—B
3-24
Model 5315A/B
Operation
Tl RATIO FREQ TOY +
MSTBY RESET A --5 EMS A/B В STOP
== re E po or 5 ra и pin pe = Pa us
TRY VG CH к КИА GATE TOT fa ” о) я Мс (с
+8 а 8 f7ME START / € ef SE J Sa
NOTE
For specifications concerning bandwidth, accuracy, and amplitude on
input signals, refer to Table 7-1.
1. Set POWER switch J to the ON position,
2. Set SEP/COM A switch 6
to SEP position.
3. Connect the input signals to INPUT À 12 us
signal to INPUT A and lower frequency signal to INPUT B ensures that the counter
meets its ratio accuracy specifications. Also, the ratio will always be greater than one,
4. Select RATIO A/B €) , and ensure the Blue SHIFT key €)
is in the out position.
P switches to desired positions.
control @ fully
7. Adjust each LEVEL/SENS control В 9
the corresponding trigger light flashes. Fi Signal are less than 250 mY rms, the SENS
controls may be fully cw.
8. Adjust the GATE TIME control
Blue SHIFT key €.
Figure 3-17. Ratio A/B Measurements
3-25
Model 5315A/B
Operation
Г =
A
E
E E
HELE
REE
mo
RE.
=
=
=
И
a
e
ООВ
К
wa
и
>
За
i
POWER RATIO FREQ TOT
ÆSTBY RESET ELA
.
Gi
©
а
AEE
THA
iia
Th
an
E
Er
NOTE
For specifications concerning bandwidth, accuracy, and amplitude
on input signals, refer to Table 1-1.
1. Set POWER switch © to the ON position.
2, Set SEP/COM A switch €3 to SEP position.
@ and the
3. Connect the signal, either sine wave or pulses, to be totalized to INPUT A jack
gate control signal to INPUT B jack O
NOTE
This mode will totalize inputs on Channel A for the time between
two events on Channel B. The Gate will open on the A Slope setting
and close on the B Slope setting. Reset is required to make a
new measurement.
4, Press A BY B switch and the Blue SHIFT key O to select the totalize A BY B
function. |
5. Set AC/DC di 18 Uy E 2 switches to desired positions.
6. Set TRIGGER LEVEL/ SENSITIVI to SENSITIVITY position and LEVEL/ SENS
UP UN fully cow. This sets the trigger level at 8 volts (nominally} and sensitivity to minimum
(500 mV).
7. Adjust each LEVEL/ SENS ae in a clockwise direction slightly beyond the point the corre-
sponding trigger light flashes, If signals are less than 250 mV rms, the LEVEL/ SENS controls
may be fully cw.
8. This function operates in a Single Shot mode. The RESET key must be pressed to initiate a
new measurement,
Figure 3-18. A BY B Measurements
3-26
Model 5315A/B
Operation
с rRIGGER/
3 LEVEL,
ATTN ELTER
Ha NOR
SEP
POWER RATIO FREQ TOT pes
astray RESET с
GATE He
TIRE. SYAR
signal to INPUT B jack 17
width less than the burst.
NOTE
This mode will average together multipie frequency bursts and display
the average frequency of the signal within the burst. Due to the
complexity of this function it is recommended that the user thoroughly
read paragraph 3-23 before attempting to use this function.
4. Press T.l, DELAY, CHECK switch € and RATIO A/B, A BY B switch В
together for a
gate time of 500 us-30 ms or FREQ A, PER A switch @]} and TOT STOP, TOT START switch QQ
for a gate time of 60 ms-10 s.
5,
6. ы
for a positive enable slope, IN for a negative enable slope (negative slope only using SHORT
measurement interval).
7.
8.
9.
corresponding trigger 9 . If the signals are less than 250 mV, the LEVEL/SENS
controls may be fuliy cw.
Figure 3-19. FREQ A Armed by B Measurements
3-27
Model 5315A/B
Operation
POWER RATIO FREQ TOT
HASTBY BESET] с
NOTE
For specifications concerning bandwidth, accuracy, and amplitude on
input signals, refer to Table 1-1.
Set POWER switch @ to the ON position.
Set SEP/COM A switch
Connect the signal to be totalized to INPUT A jack U
NOTE
© to SEP position.
This mode will totalize inputs on Channel A for the period of time
manually selected on front panel switches,
Press TOT switch €} is in the out position,
Set AC/DC €} , ATTN
Set TRIGGER LEVEL/SENSITIVITY switch @} to SENSITIVITY position and LEVEL/sENS @
cew. This sets the trigger level at 0 volts (nominally) and sensitivity to minimum (500 mV),
Adjust the LEVEL/SEMNS control €}
Channel A trigger light 26 flashes.
Press RESET o to ciear display.
Press Blue SHIFT key | O PIN to START totalize measurement, and press again (out position} to
STOP totalize. Repeat this procedure to accumulate count, press RESET § 29) to clear display and
enable a new measurement.
and ensure the Blue SHIFT key ED
EI switches to desired positions.
13 } and Slope
fully
in a clockwise direction slightly beyond the point the
3-28
Figure 3-20. Totalize Measurement
Model 5315A/B
Operation
ATTN FILTER
не - xi NORM SER
BSTSY RESET Luc) PS Вий Past)
E a | ms X20 100K Hz COM A X20
А -= В TE START
PER TI AVG CHECK A fe TOT
NOTE
For specifications concerning bandwidth, accuracy, and amplitude
on input signals, refer to Table 1-7.
1. Set POWER switch CD
2. Set GATE TIME control €
3. Select FREQ C and be sure that the blue SHIFT key is in the OUT position.
in cin he TEA Fiol ao aa Jin a
to ON position.
О
>
C
—
Q
z
TE
Be sure that the input C signal does not exceed 1 Y rms into
50 ohms,
4, Connect the input signal to INPUT C jack
NOTE
The INPUT Connector is a special fused BNC. The in-line fuse within the
connector is accessible from the front panel. Refer to the Operator's
Maintenance section, paragraph 3-77, for replacement of fuse.
5. Set SENS C control
light
6. Adjust the GATE TIME control € for the desired resolution. The actual gate time may be
displayed by pressing the GATE TIME function switch § UP and the Blue SHIFT key GP. Moving
the GATE TIME control &B fully cow into detent will HOLD the measurement display. In
HOLD, single-shot measurements with minimum gate time can be made by pressing the
RESET ED key.
ÉS to min. Siowly rotate the control in a cw direction until the GATE
| €) Just turns on, |
NOTE
The only controls active in FREQ C function mode are GATETIME 0
RESET UP, and SENS C E . However, pressing either Channel A 61
ог В Él) scope switches will reset the counter. All other controls have
no effect.
Figure 3-21. Frequency C Measurement (Option 003)
3-29

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Key Features

  • Measures signals to 100 MHz
  • Measures frequency, period, time interval, and more
  • Two independent input channels
  • 1 GHz input option available
  • Totalize function with manual or external gating

Related manuals

Frequently Answers and Questions

What is the frequency range of the 5315A/B Universal Counters?
The 5315A/B Universal Counters measure signals over a range from 0.1 Hz to 100 MHz.
What types of measurements can the 5315A/B Universal Counters perform?
The 5315A/B Universal Counters can measure frequency, period, time interval, time interval average, time interval holdoff (delay), and ratio. They also provide a totalize function with manual or external gating.
What is the difference between the 5315A and 5315B Universal Counters?
The 5315A and 5315B are functionally identical; the 5315B is designed for rack mounting or stacking and features a metal cabinet to minimize electromagnetic interference. (The 5315A has a high-strength plastic cabinet.)
What is Option 003 for the 5315A/B Universal Counters?
Option 003 is a 1 GHz third input channel that provides frequency measurements from 50 MHz to 1 GHz.
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