HP 5305B Service manual
O P E R A T I N G A N D S E R V I C E M A N U A L
1300 MHz COUNTER
5305 B
CERTIFICATION
t
Hewlett-Packard Company certifies that this instrument met its published specifications a
the time of shipment from the factory. Hewlett-Packard Company further certifies that its
calibration measurements are traceable to the United States National Bureau of Standards,
to the extent allowed by the Bureau's calibration facility, and to the calibration facilities of
other International Standards Organization members
.
WARRANTY AND ASSISTANCE
This Hewlett-Packard product is warranted against defects in materials and workmanship for
a period of one year from the date of shipment. Hewlett-Packard will, at its option, repair or
replace products which prove to be defective during the warranty period provided they are
returned to Hewlett-Packard, and provided the preventive maintenance procedures in this
manual are followed. Repairs necessitated by misuse of the product are not covered by this
warranty. NO OTHER WARRANTIES ARE EXPRESSED OR IMPLIED, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE. HEWLETT-PACKARD IS NOT LIABLE FOR CONSEQUENTIAL
DAMAGES.
Service contracts or customer assistance agreements are available for Hewlett-Packard
products.
For any assistance, contact your nearest Hewlett-Packard Sales and Service Office.
Addresses are provided at the back of this manual.
SECTION I XE
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1300 MHz COUNTER
5305 B
OPERATING AND SERVICE MANUAL
Model 5305B
Table of Contents
SERIAL PREFIX: 1616A
This section applies directly to Model 5305B 1300 MHz
Counters having Serial Prefix 1616A. This section is
provided in loose-leaf form for incorporation into the 5300
Measurement System Manual. 5305A instruments are
documented in a separate manual.
NEWER INSTRUMENTS
This section with enclosed "Manual Changes" sheet
applies directly to HP Model 5305B 1300 MHz Counters
havin
Serial Prefix numbers above 1616A.
OLDER INSTRUMENTS
Subsection VII of this document contains information
ertinent to all older instruments.
Copyright HEWLETT-PACKARD COMPANY 1976
5301 STEVENS CREEK BLVD., SANTA CLARA, CALIF. 95050
Printed: AUG 1976
MANUAL PART NO. 05305-90008
MICROFICHE PART NO. 05305-90009
PRINTED IN U.S.A.
TABLE OF CONTENTS
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Model 5305B
Table of Contents
Section
I X E 5305B 1300 MHz Counter
Subsection
I GENERAL INFORMATION ...................................................................................... 9E-1-1
9E-1-1. Scope of Manual.................................................................................... 9E-1-1
9E-1-3. Description ............................................................................................9E-1-1
9E-1-6. Instrument Identification ....................................................................... 9E-1-2
9E-1-8. Equipment Supplied .............................................................................. 9E-1-2
9E-1-10. Accessories Available ........................................................................... 9E-1-2
9E-1-12. 5300A/5300B Compatibility. ... ............................................................9E-1-2
9E-1-14. Specifications ........................................................................................9E-1-2
9E-1-16. Recommended Test Equipment............................................................. 9E-1-2
II INSTALLATION......................................................................................................... 9E-2-1
9E-2-1. Unpacking and Inspection ..................................................................... 9E-2-1
9E-2-3. Storage and Shipment............................................................................ 9E-2-1
9E-2-6. Installation and Removal of Plug-On .................................................... 9E-2-1
9E-2-8. Portable Operation................................................................................. 9E-2-1
III OPERATION
9E-3-1
9E-3-1. Introduction ........................................................................................... 9E-3-1
9E-3-3. Operating Characteristics ...................................................................... 9E-3-1
9E-3-5. Input Channels.................................................................................... 9E-3-1
9E-3-9. Resolution.............................................................................................. 9E-3-1
9E-3-11. 1300 MHz Channel Input Levels........................................................ 9E-3-2
Pa
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IV THEORY OF OPERATION........................................................................................ 9E-4-1
9E-4-1. Introduction ........................................................................................... 9E-4-1
9E-4-3. A1 LogicBoard...................................................................................... 9E-4-1
9E-4-5. High Impedance Amplifier................................................................. 9E-4-1
9E-4-12. Counting Circuits................................................................................ 9E-4-1
9E-4-16. Frequency Multiplier .......................................................................... 9E-4-2
9E-4-30. 1300 MHz ÷ Circuit............................................................................ 9E-4-4
9E-4-32. A2 1300 MHz Amplifier Assembly……………………………………9E-4-4
V MAINTENANCE......................................................................................................... 9E-5-1
9E-5-1. Introduction ........................................................................................... 9E-5-1
9E-5-3. Recommended Test Equipment............................................................. 9E-5-1
9E-5-5. In-Cabinet Performance Check .............................................................9E-5-1
9E-5-7. Instrument Access ................................................................................. 9E-5-1
9E-5-9. Periodic Maintenance ............................................................................ 9E-5-1
9E-5-11. Maintenance and Repair........................................................................ 9E-5-1
9E-5-15. Adjustments........................................................................................... 9E-5-5
9E-5-17. Channel A Adjustments......................................................................... 9E-5-5
9E-5-19. Channel B Adjustments......................................................................... 9E-5-6
9E-5-21. Troubleshooting..................................................................................... 9E-5-6
9E-5-25. 100 MHz Channel Troubleshooting ...................................................... 9E-5-6
9E-5-27. 1300 MHz Channel Troubleshooting .................................................... 9E-5-7
9E-5-29. Both Channels Inoperative…………………………………………...9E-5-7
9E-5-34. Frequency Multiplier .......................................................................... 9E-5-7
VI REPLACEABLE PARTS ............................................................................................9E-6-1
9E-6-1. Introduction ........................................................................................... 9E-6-1
9E-6-3. Orderin
Information............................................................................. 9E-6-1
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Model 5305B
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Table of Contents
List of Tables and Fi
Subsection Page
VII MANUAL CHANGES .…….....................................................................................9E-7-1
VIII CIRCUIT DIAGRAMS..............................................................................................9E-8-1
Table Page
9E-1-1. Specifications .............................................................................................................9E-1-3
9E-1-2. Recommended Test Equipment..................................................................................9E-1-4
9E-3-1. Resolution vs GateTime .............................................................................................9E-3-1
9E-5-1. In-Cabinet Performance Check ..................................................................................9E-5-3
9E-5-2. Erroneous Displays Caused by U4 .............................................................................9E-5-7
ures
TABLE OF CONTENTS (Cont'd)
9E-7-1. ManualChanges ...................................................................................9E-7-1
9E-7-3. NewerInstruments................................................................................9E-7-1
9E-8-1. Introduction..........................................................................................9E-8-1
LIST OF TABLES
9E-6-1. Replaceable Parts .......................................................................................................9E-6-3
9E-6-2. Manufacturers Code List ............................................................................................9E-6-8
9E-8-1. Counter Signal List.....................................................................................................9E-8-1
LIST OF FIGURES
figure Page
9E-3-1. dBm-to-Voltage Conversions.....................................................................................9E-3-1
9E-3-2. Front Panel Controls, Connectors, and Indicators......................................................9E-3-2
9E-3-3. Self-Check Measurements..........................................................................................9E-3-3
9E-3-4. 100 MHz Channel Frequency Measurements……………………………………….9E-3-4
9E-3-5. 90 MHz-1300 MHz Channel Frequency Measurements ............................................9E-3-5
9E-4-1. Phase Detector Block Diagram...................................................................................9E-4-2
9E-4-2. VCO Waveforms at about 2MHz...............................................................................9E-4-3
9E-4-3. VCO Characteristics...................................................................................................9E-4-4
9E-5-1. Separation Procedure..................................................................................................9E-5-2
9E-5-2. Test Setup for 1300MHz Adjustment.........................................................................9E-5-5
9E-6-1. Details of Input Connector J1 and Fuse Mounting………………………………….9E-6-8
9E-8-1. Channel B and Frequency Multiplier Circuits, Schematic Diagram ..........................9E-8-5
9E-8-2. Channel A and Lo
ic Board Circuits, Schematic Diagram………………………….9E-8-9
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SECTION I XE
5305B 1300 MHz COUNTER
SUBSECTION I
GENERAL INFORMATION
Model 5305B
General Information
9E-1-1. SCOPE OF MANUAL
9E-1-2. This manual provides operating and service
information for the Hewlett-Packard Model 5305B 1300
MHz Counter. Information for the mainframes (5300A
or 5300B) is contained in separate manuals. This
manual is divided into eight sections containing the
following information:
SECTION 1 GENERAL INFORMATION covers a
description of the counter, equipment supplied,
accessories, specifications, and recommended test
equipment.
SECTION II INSTALLATION provides instructions for unpacking, inspection, preparation for use,
shipment, and storage for the counter.
SECTION III OPERATION covers the counter's
operating features including front-panel controls,
input level considerations, and operating and selfcheck procedures.
SECTION IV THEORY OF OPERATION
describes the counter's theory of operation.
SECTION V MAINTENANCE contains an incabinet performance check, adjustments, and
troubleshootin
information.
SECTION VI REPLACEABLE PARTS provides a
complete list of the counter's replaceable parts and
information for ordering parts.
SECTION VII MANUAL CHANGES provides
information necessary to backdate the manual to cover
earlier instruments.
SECTION VIII SCHEMATIC DIAGRAMS THEORY
contains schematic diagrams, and component locators.
9E-1-3. DESCRIPTION
9E-1-4. The 5305B extends the frequency measuring
capability of the 5300 Measuring System to the UHF range.
The counter features burst or CW measurements to 1300 MHz,
separate channels to cover 90 MHz-1300 MHz and 50 Hz to
100 MHz both with 20 mV rms sensitivity, high resolution
mode for fast tone measurements, automatic gain control for
both channels or manual attenuator control for the high
frequency channel, fuse protected high frequency channel,
and probe power plus accessory preamp for high sensitivity
applications. When operating in the high resolution mode, a
phaselocked multiplier gives 1000 times improvement in the
resolution of audio tone measurements. This feature is
especially useful for servicing equipment using tone
modulation for di
ital encoding on the carrier.
9E-1-1
Model 5305B General
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Information
The 5305B is applicable to mobile communication bands
in addition to VHF and UHF TV transmissions plus
TACAN/DME and ATC radar transponders.
9E-1-5. The 10855A Preamplifier is available to boost
the UHF sensitivit
of the counter by a minimum of 22 dB.
9E-1-6. INSTRUMENT IDENTIFICATION
9E-1-7. Hewlett-Packard instruments have a 2-section,
10-character serial number (0000A00000) which is located
on the rear panel. The 4-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 prefixes 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 than that listed on the title page, are covered in the
backdating Section VII.
9E-1-8. EQUIPMENT SUPPLIED
9E-1-9. The 5305B is supplied with an operating and
service manual.
9E-1-10. ACCESSORIES AVAILABLE
9E-1-11. For high-sensitivity UHF applications, the
10855A Preamplifier can be used with the 5305B. The
10855A covers the 2 MHz to 1.3 GHz range with a gain of
22 dB minimum. Power requirements are +15 volts at ≈ 40
mA. The 5305B has a front-panel connector to supply the
required + 15 volts to 10855A.
9E-1-12. 5300A/5300B COMPATIBILITY
9E-1-13. The 5305B is fully compatible with either the
5300A or the 5300B mainframe. Unlike the 5305A, a highstability time base is not available for the 5305B, however
a hi
h-stability time base is available for the 5300B.
9E-1-14. SPECIFICATIONS
9E-1-15. Specifications are listed in Table 9E-1-1
.
9E-1-16. RECOMMENDED TEST EQUIPMENT
9E-1-17. Test equipment recommended for testing,
calibration, and repair of the 5305B is listed in Table 1-2.
9E-1-2
Table 9E-1-1. Specifications
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5305B General
INPUT CHANNEL A (CW OR BURST)
Range: 90 MHz to 1300 MHz, prescaled by 16
Sensitivity: 20 mV rms
Impedance: 50Ω
Attenuator: Continuously variable to give optimum
noise suppression for si
nals up to 3.5V rms.
Overload Protection: 5V rms, maximum. Input cir-
cuitry is fuse protected; fuse is located in BNC
connector and is accessible from the front panel.
Operating Dynamic Range: > 47 dB
INPUT CHANNEL B (NORMAL AND HIGH
RESOLUTION MODE)
Range: 50 Hz to 100 MHz, direct count in normal
mode. 50 Hz to 10 kHz in high resolution mode. In
the high resolution mode, the 5305B uses a phaselocked multiplier to increase resolution X1000 over
normal measurement resolution.
Sensitivity: 20 mV rms
Impedance: 1 MΩ shunted by less than 40 pF.
FREQUENCY MEASUREMENT
RESOLUTION (SELECTABLE):
Normal Mode (50 Hz to 1300 MHz): 0.1 Hz to
10000 Hz in decade steps corresponding to gate times
of 10 sec to 0.0001 sec in decade steps on channel B
and to gate times of 160 s to .0016 s in decade steps on
channel A.
High Resolution Mode (50 Hz to 10 kHz): 0.0001,
0.001, 0.01, 0.1, 1, 10 Hz corresponding to 10, 1, 0.1,
0.01, 0.001, 0.0001 second
ate times on channel B.
Accuracy: ±1 digit displayed ± time base accuracy.
Display: Hz, kHz, MHz with positioned decimal point.
GENERAL
Check: Counts internal 10 MHz reference frequency
to check counting circuits.
Operating Temperature: 0° to 50°C.
Power Requirements: Nominally 12 watts including
mainframe.
Weight: Net 1.0 kg (2-1/4 lbs.); Shipping 1.8 kg (4 lbs.)
Overload Protection: 250V rms from 50 Hz to 10
kHz, declining to 10V rms above 10 MHz.
Search Indicator: In high-resolution mode the "S"
annunciator is lit whenever the input is beyond the
proper frequency range, or too weak to measure, or
during the brief acquisition time following signal
interruption.
Automatic Hold: In high-resolution mode, the last
valid reading is held in display when input is
terminated.
Dimensions: With mainframe, 89 mm H (3-1/2")x 160
mm W (6-1/4") x 248 mm L (9-3/4").
Compatible Mainframes: 5300A (6 digits) or 5300B
(8 digits). 5300B is recommended.
Accessories: 10855A Preamp (22 dB gain).
9E-1-3
Model 5305B General
Information
Oscilloscope 50 MHz Bandwidth HP 180A
Vertical Plug-In 50 mV/div Sensitivity HP 1801A
Time Base Plug-In 50 MHz Bandwidth HP 1821A
Sampling Plug-In 1000 MHz HP 1810A
Optical Sampling Plug-In If desired to measure up to 1300 MHz HP 1811A/1432A
Synthesized Signal Generator 1300 MHz HP 8660B/86602A
Power Meter -30 dBm to + 10 dBm HP 435A
Power Sensor 90 MHz to 1300 MHz HP 8481A
Test Oscillator 50 Hz to 10 MHz 3V rms HP 651B
Mainframe HP 5300B
Table 9E-1-2. Recommended Test Equipment
Instrument Required Characteristics Recommended Type
Digital Voltmeter -5V to +20 V dc HP 5306A
Power Splitter 50 ohms 90 MHz to 1300 MHz HP 11667A
Scope Probe 10:1 1 MegΩ HP 10004D
9E-1-4
SECTION IX E
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5305B 1300 MHz COUNTER
SUBSECTION II
INSTALLATION
Model 5305B
Installation
9E-2-1. UNPACKING AND INSPECTION
9E-2-2. If the shipping carton is damaged, ask that the
carrier's agent be present when the instrument is unpacked.
Inspect the instruments for damage, such as scratches,
dents, broken knobs, etc. If the instrument is damaged or
fails to meet performance tests when used with the 5300B
Measuring System, notify the carrier and the nearest
Hewlett-Packard Sales and Service Office immediately.
Performance check procedures are located in Section IX E5, and Sales and Service Offices are listed in Section VI of
the 5300B portion of the manual. Retain the shipping
carton and the padding material for the carrier's inspection.
The Sales and Service Office will arrange for the repair or
replacement of the instrument without waiting for the
claim a
9E-2-3. STORAGE AND SHIPMENT
9E-2-4. PACKAGING. To protect valuable electronic
equipment during storage and shipment, always use the
best packaging methods available. Your HewlettPackard Sales and Service Office can provide packaging
material, such as that used for original factory packaging.
Contract packaging companies in many cities can provide
dependable custom packaging on short notice. Here is one
recommended packa
box with 200 lbs. burst test (HP Part No. 9211-1620). The
instrument is secured and protected, while in the box, by a
ainst the carrier to be settled.
method:
a. The original container is a corrugated cardboard
top and bottom molded frame of polystyrene (HP Part No.
9220-1545). Also included with the instrument is a plastic
dust-protection cover (HP Part No. 9220-1762).
9E-2-5. ENVIRONMENT. Conditions during storage
and shipment should be normall
a. Maximum altitude: 25,000 ft.
b. Minimum temperature: -40°F( -40°C).
c. Maximum temperature: +167°F(+75°C).
9E-2-6. INSTALLATION AND REMOVAL OF
PLUG-ON
9E-2-7. The 5305B 1300 MHz Counter must be used
with a mating 5300A or B Measuring System, before any
measurements can be made. To mate the 5305B 1300 MHz
Counter with a 5300 Measuring System, see Figure 2-1
and Para
9E-2-8 PORTABLE OPERATION.
9E-2-9. The use of the HP Model 5310A Battery Pac
enables the 5300 Measuring System and 5305B 1300 MHz
Counter to be used in areas removed from ac power
sources. The 5310A Battery Pack typically provides 5
hours of portable operating time before recharging. Tables
1-2 and 1-4 in 5300 portion of the manual lists the HP
5310A Battery Pack as an available accessory.
Documentation on the 5310A is also included in Section
IV through VIII of the 5300 portion of the manual. To
prepare the 5300/5305B for portable operation, refer to
Paragraph 2-13 and Figure 2-2 in the 5300 portion of the
manual.
raph 2-11 in the 5300 portion of the manual.
limited as follows:
9E-2-1
Model 5305B
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Operation
SECTION IX E
5305B 1300 MHz COUNTER
SUBSECTION III
OPERATION
9E-3-1. INTRODUCTION
9E-3-2. This section covers operating information for the
5305B including a description of controls, indicators, and
connectors, resolution, input levels, and operating
rocedures for frequency measurements and self check.
9E-3-3. OPERATING CHARACTERISTICS
9E-3-4. The 5305B Counter performs frequency measurements by means of two separate input channels. These
channels provide a combination of low frequency
measurements and high-sensitivity, high frequency
measurements. Measurement capability is applicable to all
frequencies in the VHF and mobile communication bands in
addition to a significant portion of the UHF band. The
10855A Preamplifier can be used to boost the UHF inpu
sensitivit
9E-3-5. Input channels
9E-3-6. Two input channels are provided, Channel A - 90
MHz to 1300 MHz and Channel B - 50 Hz to 100 MHz.
Both channels have 20 mV rms sensitivit
9E-3-7. Channel A prescales the input frequency by 16 and
can be used to measure CW or burst signals. Input coupling
is ac. An AGC circuit is included to give a dynamic range
of >47 dB. An internal fuse, located inside the input jack,
rotects circuitry from overloads greater than 5V rms. Note
that a blown fuse may not prevent the counter from
measuring high-frequency inputs. In this instance, the
counter’s circuitry is no longer protected,ie.,as it would be
at lower frequencies by a good open circuit. If the fuse
blows, a replacement fuse is supplied with the instrument.
22 dB.
.
9E-3-8. The frequency range of Channel B depends on the
mode of operation - normal or high resolution. In the
normal mode, Channel B covers 50 Hz to 100 MHz. With
high-resolution selected, Channel B covers 50 Hz to 10
kHz. The high resolution mode uses a phase-locked
multiplier to increase resolution by a factor of 1000. Input
impedance is 1 Megohm shunted by less than 40 pF. A 10
to 1 divider probe can be used to increase the input
impedance to 10 Me
9E-3-9. RESOLUTION
9E-3-10. The 5305B has a RESOLUTION switch which
determines the least-significant digit (LSD) dis
example, with an input of 123,456 Hz, setting the
RESOLUTION switch to 1 kHz places the "3" in the LSD.
Setting the switch to 10 Hz, places the "5" in the LSD.
Resolution can be expressed in terms of the counter's gate
time, as shown in Table 9E-3-1.
Table 9E-3-1. Resolution vs Gate time
RESOLUTION GATE TIME
80 MHz 1100 MHz
.1 Hz 10 s 160 s
1 Hz 1 s 16 s
10 Hz .1 s 1.6 s
100Hz .01s .16s
1 kHz 1 ms 16 ms
10 kHz .1 ms 1.6 ms
ohms.
layed. For
Figure 9E-3-1. dBm-to-Volta g e Co nve rsions
9E-3-1
Model 5305B
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Operation
9E-3-11. 1300 MHz Channel Input Levels
9E-3-12. The 1300 MHz channel is a 50-ohm system with a
maximum input of 5V rms. Figure 9E-3-1 provides a
conversion scale for determinin
respective levels of
Figure 9E-3-2. Front Panel Controls, Connectors, and Indicators
voltage, power, and dBm. This scale applies to a 50-ohm
system and is not applicable to the 100 MHz channel. The
shaded area represents the specified operating range of the
1300 MHz channel.
The "S" annunciator on the 5300 lights during the h igh-resolution mode wheneve
the input is beyond the proper frequency range, or too weak to measure, or during
ac
uisition following signal interruption.
1.
90 MHz - 1300 MHz Input Jack. With RANGE
switch set to A, accepts input frequencies from 90
MHz to 1300 MHz. Input sensitivity is 20mV. 50
ohm input impedance and ac coupled. Maximu
input is 5V rms. Fuse is located inside jack. Use
BNC connector as a wrench to remove and tighten
the fuse jack. Replacement HP part number for fuse
is 2110-0301.
2.
ATTENUATOR Control. Provides manual control
of input attenuator circuit for 1300 MHz channel.
MIN position provides minimum signal attenuation.
MAX position provides maximum attenuation.
AGC circuit
3.
PREAMP POWER. Supplies + 15V @ ≈ 40 mA to
ower 10855A Preamplifier.
4. 100 MHz Input Jack. When RANGE is set to B,
ives >47 dB dynamic range.
OTE
accepts input frequencies from 50 Hz to 100 MHz.
With RANGE set to B HIGH RESOLUTION,
accepts frequencies up to 10 kHz. Input sensitivity
is 20 mV rms. Input impedance is 1 Megohm
shunted b
5.
RANGE switch. Allows selection of either of the
two input channels or the self-check mode. In the
CHK position, allows system to count the internal
10 MHz clock signal. Measurement is not affecte
signals connected to the input jacks.
6.
RESOLUTION Switch. The counter's leas
significant digit displays the measured resolution o
the input signal that is selected with the switch. Fo
example, 10 Hz selected with 6,789 Hz inpu
frequenc
less than 40 pF. Channel is ac coupled.
: counter displays 6.78 kHz.
-
9E-3-2
Figure 9E-3-3. Self-Check Measurements
Model 5305B
Operation
1. Apply input power to 5300 ac receptacle.
2. Turn counter on with 5300 SAMPLE RATE control.
Adjust SAMPLE RATE for minimum display time
(full ccw).
3. Set RANGE switch to CHK position. Display is a
function of RESOLUTION switch.
Resolution
Selector Display Annunciator Display Annunciator
5300A Self Check 5300B Self Check
10 kHz 0010.00 M, Hz 000010.00±1M, Hz
1 kHz 010.000 M, Hz 00010.000±1M, Hz
100 Hz 10.0000 M, Hz, C 0010.0000±1M, Hz, C
10 Hz 0.00000 M, Hz, C 010.00000±1M, Hz, C
1 Hz ●000.000 K, Hz, C 10000.000±1K, Hz, C
.1 Hz ●00.0000 K, Hz, C 0000.0000±1K, Hz, C
●Indicates overflow light is on.
9E-3-3
Model 5305B
Operation
Figure 9E-3-4. 100 MHz Channel Frequency Measurements
9E-3-4
1. Apply power to 5300 ac receptacle.
2. Turn counter on with 5300 SAMPLE RATE control.
3. Set RANGE switch to B position.
4. Connect input signal to 100 MHz jack.
5. Set RESOLUTION switch for number of digits desired
in display.
6. Adjust SAMPLE RATE control for convenient interval
between measurements.
7. For high resolution, set RANGE switch to B 10 kHz
MAX - HIGH RESOLUTION X1000. This limits the
input frequency to 10 kHz but gives resolution up to 4
decimal places.
Model 5305B
Operation
Figure 9E-3-5. 90 MHz -1300 MHz Channel Freque ncy Me asurements
1. Apply input power to ac receptacle.
2. Turn counter on with 5300 SAMPLE RATE control.
3. Set RANGE switch to A position.
4. Set RESOLUTION switch to 10K.
5. Set ATTENUATOR control to MIN position.
CAUTION
Input level must not exceed 5V rms.
6. Connect input signal to 90 MHz -1300 MHz jack.
7. Adjust ATTENUATOR control until counter
stops displaying, then back again until counter
gives a stable display of the proper frequency.
9E-3-5
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