Racal Instruments 9057 User manual

9057 & 9059
Frequency Period Meter
Technical Manual
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G0RSQ
23
rd May 2018

9057 &9059
Frequency-PeriodMeters
Racal Instruments Limited Duke Street, Windsor, Berks,
Prepared by Technical Publications, Racal Group Services Limited.
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SECTION 1
SECTION 2
CHAPTER 1
CHAPTER 2
CHAPTER 3
CHAPTER 4
CHAPTER 5
9057/9059
f£)="f:T~~J~ =LJ~T=
FRONTISPIECE
TECHNICAL SPECIFICATION
OPERATION AND MA.INTENANCE
GENERAL DESCRIPTION
PRE PARA Tl ON FOR USE
lv'cins Pack Operation
Battery
Pack Operation
Fuselink Data
Removing the Case
Self Check
OPERATING INSTRUCTIONS
Front Panel Controls
Front Panel
Inputs
Rear Panel Components
OPERA Tl NG PROCEDURES
General Information
Frequency Measurement
Period Measurement
Overspill
PRINCIPLES OF OPERATION
General
Frequency i\iteasurement
Self Check
Period Measurement
TECHNICAL DESCRIPTION
Introduction
Attenuator
Assembly 19-0620
Amplifier and Pre-scaler
Assembly 19-0604
Control
Assembly 19-0608
Internal/External Frequency Standard
Internal/External Selection
Frequency Standard Division
Function Selection
Time Base
Time Base Selection
Input Attenuator
Assembly 19-0662
Page
1-1
2-1
2-1
2-1
2-2
2-2
3-1
3-2
3-2
3-3
3-3
3-3
3-3
4-1
4-1
4-2
4-2
5-1
5-1
5-1
5-2
5-2
5-2
5-2
5-3
5-3
5-4
5-4
Contents (1)
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CHAPTER 6
' ' '
TABLE 1
2
3
4
Fig.
2.1
Fig. 2.2
Fig. 2.3
Fig. 2.4
Fig. 2.5
SECTION 3
9057/9059
Page
Amplifier and High Speed Decade Assembly 19-0605
5-5
Check Signal 5-5
Auxiliary -6.2V Supply 5-5
Automatic Cut-out 5-6
Gating Control 5-6
Sampling Rate 5-7
NtanuaI Reset 5-7
Readout Assembly 11-0754 5-7
Overflow Indication 5-8
Frequency Standard 5-8
Power Supplies 5-8
Ntains Pack Operation 5-8
Battery Pack Operation 5-1 0
MAINTENANCE
List of Test Equipment Required
Use of Test Equipment
Power Supply Checks
Ntains (A.C
.) Powered Instruments
Battery Powered Instruments
Performance Tests
Setting
Up Internal Frequency Standard
External Frequency Standard Input
Attenuator Checks
Sensitivity Check
Setting
Up Schmitt Trigger
Amplifier and
Pre-scaler Assembly 19-0604
Miscellaneous Servicing Information
LIST OF TABLES IN SECTION 2
Self Check (Frequency) Displays
Self Check (Period) Displays
9057 and 9059 Channel A Sensitivity Check
9059 Channel BSensitivity Check
LIST OF ILLUSTRATIONS IN SECTION 2
Simplified Block Diagram Type 9057/9059
Function Selection Logic
Counting Decade Waveforms
Service View: Chassis Upperside }
Service View: Chassis Underside
at the end
of Chapter 6
OPTIONS
AND SUPPLEMENTARY INFORMATION
Information will
be included when required.
6-1
6-1
6-2
6-2
6-2
6-3
6-3
6-4
6-4
6-5
6-7
6-8
6-8
2-2
2-3
6-6
6-7
4-3
5-5
5-10
Contents (2)
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SECTION 4
Fig.4. 1
Fig.
4.2
Fig. 4. 3
Fig.4.4
Fig.4.5
Fig.4. 6
Fig.4.7
Fig.4.8
Fig.4. 9
Fig.4.10
Fig.4.11
Fig.4.12
Fig.4.13
Fig.4.14
Fig. 4. 15
SECTION 5
9057/9059
PARTS LISTS, CIRCUIT DIAGRAMS AND LAYOUTS
Parts List
Circuit and Layout: Attenuator Assembly
Parts List
Layout: Amplifier and
Pre-Scaler Assembly
Circuit: Amplifier and
Pre-Scaler Assembly
Parts List
Layout: Control Assembly
Circuit: Control Assembly
Parts List
Circuit and Layout: Input Attenuator
Parts List
Layout: Amplifier and High Speed Decade
Circuit: Amplifier and High Speed Decade
Parts List
Layout: Readout Assembly
Circuit: Readout Assembly
Parts List: Mains Pack Assembly
Layout: Power Supply Board
Circuit: Mains Pack Assembly
Parts List: Battery Pack Assembly
Layout: Charge Regulator Assembly
Circuit: Battery Pack Assembly
Parts List: Chassis Assembly
Interconnections: Module 9057 & 9059
APPENDICES AND CHANGE INFORMATION
19-0620
19-0604
19-0608
19-0662
19-0605
11-0754
11-0758
19-0664
11-0758
11-0759
19-0665
11-0759
Contents (3)
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SECTION 1
=========
TECHNICAL SPECIFICATION
==========================
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------------ -- --
NOTE: The data applies to both models except where indicated otherwise.
1. 1 FREQUENCY RANGE
Model 9057:
Model 9059:
1.2 SIGNAL INPUT
1OHz -80MHz directly gated.
10Hz- 80MHz Channel 1A' directly gated .
40MHz -
56 0M Hz Channe I Is· prescal ed by. 1 0.
Model 9057 and Model 9059 Channel •A•
Sensitivity:
Better than lOmY
Impedance:
1 MOin parallel with 25 pF. a .c. coupled.
Signal Conditions: 9057 and 9059 Channel 1A'
Sensitivity Switch
Setting
Signal Range
(volts
r.m.s.)
Maximum input
before damage
(volts r.m. s .)
D. C. Dam u ge Overload
Connection:
Model 9059 Channel Is·
Sensitivity:
Impedance:
9057/9059
0.01
0. 1
0.01 -lOY
0.1 - lOOY
250Y below 100kHz 250Y below 1OOkHz
Derate to lOY at Derate to lOOY at
80MHz 80MHz
400Y
D.C.
B. N.C. connector, front panel.
Better than lOmY to 500MHz
falling to 50mY at 560MHz:
500nominal
Tech. Spec. (1)
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Signal Conditions: Channel 'B' (9059)
Sensitivity Switch
Setting
0.01
0.1
Signal Range 0.01 - 0.5V
0.1 -4V
Ma?<imum input
before damage
5V
5V
(volts r.m.s.}
D.C. Damage Overload 50V D.C.
1.3 FREQUENCY MEASUREMENT
Frequency Range:
Accuracy:
Gate Times:
Self Check:
1.4
PERIOD MEASUREMENT
Range:
Periods
Averaged:
Clock Units:
Self Check:
1 .5. TIME BASE
Frequency Standard
Warm-up Time
9057/9059
Refer to 1. 1
± 1 count± timebase accuracy.
10ms1 lOOms. ls and lOs.
Internal 100kHz signal. (Does not operate on
Channel 'B' of the 9059).
NOTE: On the 9059 the signal will be applied
to Channel 'A'.
10Hz to 3 MHz
1
I 10I 100 Or 1I 000
10 f-'S
Internal 100kHz signal.
5 MHz Crystal Oscillator model 9440or 9441 with
proportional temperature control.
Typicclly 2 minutes for an accuracy of 1 part
in 10 and 4 minutes for an accuracy of 1 ·
part in 107.
Tech. Spec. (2)
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r
Ageing Rate
Temperature Performance
1
.6 EXTERNAL STANDARD INPUT
Frequency
Minimum
level
Maximum level
1.7 DISPLAY
Format
latch
Reset
Overflow
1 .8 POWER SUPPLY
Better than 1
part in 108 per day on delivery,
and typi~ally better than 5 parts in 109 per
day after 1 months operation.
Better than 1 part in 108 per
0(
average over
0
the range -10 to 45 C.
1MHz
100mV
r.m.s. in 1 kOcapacitively coupled.
1 OV r .m .s. 100 V d. c.
Six digit in-line solid state numerical indicators
plus
overflow. Decimal point automatically
positioned.
Previous measurement is displayed during period
required to
complete new measurement. Display
is
automatically up-dated at the end of each
measurement.
Operation of the Reset push-button resets the
display to zero and the instrument is then ready
to commence new measurement.
Overflow lamp lights if display reading exceeds
999999.
NOTE: The Battery Power Pack and A .C. Power Pack are offered as sep<9rate
options One is necessary to operate the instrument.
Battery
Operation
Power Source
Fixing
Batteries
Operating Time
9057/9059
Option 07-lbttery Pack incorporating built-in
charger.;
Clamped to rear of counter by two finger-
tightened screws.
Eight re-chargeable nickel-cadmium •D• size
cells.
Approximately 5 hours at 25°C from fully
charged condition.
Tech. Spec. (3)
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Battery Protection
Charging Rates
Mains Input for Recharging
A.C. Mains (Line) Operation
Power Source
Fixing
Output
Mains Input
ENVIRONMENTAL
CONDTIONS
Operating Temperature
Storage Temperature
Humidity
9057/9059
The battery load is < automatically removed when
voltage falls to about 4. 5 V and a front panel
lamp lights to indicate that batteries need re-
charging . Alarm lamp will remain on for
about 10 ho~Jrs.
Normal-Requires about 14 hours for complete
re-charge. Rate cannot damage cells if
inadvertently left on.
Trickfe-A trickle charge is automatically applied
in the OPERATE mode if the mains input
is left connected and the instrument
switched off on the front
panel. The
pack can be left on trickle charge
indefinitely.
Voltage 115 V -1:: 10% and 230 V ± 100/o at a
frequency from 45 to 440Hz. Consumption
approximately 9 VA.
Option 08-Mains Pack
Clamped to
rear of counter by two finger-
tightened screws.
+ 5 V
d.c. at approximately 1.5A.
110, 120, 200, 220 and 240 V ± 6% at a
frequency from 45 to 440 Hz. Consumption
approximately 17VA.
0 0
0Cto+45C.
0 . co
-40 C to + 60 C.
95% R.H. at40"C.
Tech. Spec. (4)
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MECHANICAL DETAILS
Construction
Dimensions
Weight
ACCESSOR! ES
Issued with instrument
9057/9059
Both the Counter and Power Packs are contained
in moulded cases of A. B.S. high impact material
The Counter has a protective shower-resistant lid.
Height Overall 108mm (4;!-
11
).
Width Overall 229mm (9
11
) .
11
Depth Overall including pack 298mm (111'6
11
).
Including Battery Pack-approximately 3 .3 kg
(7~ lbs)
Including Mains Pack-approximately 2.5 kg
(5~1bs).
One handbook .
One 6ft. long mains lead.
One bag of spare fuses .
Two B.N .C. plugs.
Tech. Spec (5)
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SECTION 2
-----------
DESCRIPTION
===-==-~===~==
OPERATION & MAINTENANCE
~=~-~~===~=~=~===========~=
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INTRODUCTION
1.1 The Frequency Period Meters Type 9057 and 9059 are compact portable instruments
particularly suited to the needs of the communications industry. The instruments
are available in either mains or battery-powered versions, with re-charging facilities
provided in the battery pack.
FACILITIES
Type 9057
1
.2 Direct frequency measurement is provided in the range 1OHz to BOMHz and period
measurement
from 1OHz to 3MHz, with four gate times. Sensitivity is better than
10mV over the frequency range. Input is on a single channel with a switched attenuator
which permits a maximum input level of lOOmV r.m.s. to be applied.
Type 9059
1
.3 The 9059 is similar to the 9057, but with two input channels, the facilities on
Channel
'A' being the same as for the 9057. The second input (Channel 'B') is
provided with a separate switched attenuator feeding a pre-scaler assembly which extends
the frequency range to 560MHz. The 10mV sensitivity is maintained up to 500MHz,
decreasing to 50mV at 560MHz. The switched attenuator permits a maximum input level of
4V
r.m.s. on Channel 'B'. ·
Display
1.4 The six-digit display employs in-line solid state numeric indicators with automatic
positioning of decimal point. An "overflow" indicator lamp effectively extends the
readout to seven digits.
CONSTRUCTION
1
.5 The circuit assemblies are mounted on a main chassis which is secured to the rear of
the front panel assembly, this complete assembly being inserted in a case which is
attached to the front panel assembly by six screws. The power pack is secured to the rear
of the instrument by hand-tightened bolts, the power connections between the two sections
being made Via an 8-way socket on the pack which mates with a fixed plug on the main
chassis. The front panel has a hinged hood which can be closed to protect the panel when
the instrument is not in use.
PARTS LISTS
1.6 Parts Lists for individual assemblies will be found preceding the layout and circuit
diagrams for each assembly.
1-1
9057/9059
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FREQUENCY STANDARD
1
.6 The reference frequency is generated by a 5MHz plug-in Racal fast Warm-Up
oscillator of high
stability. A front panel socket with
associated switch provides for the use of an external frequency standard if required. It
should be noted that the accuracy of measurements made by the instruments is directly
related to the accuracy of the frequency standard used.
POWER PACKS
1
.7 The power packs are offered as options, thus allowing the customer to specify mains
or
battery operation, or to convert from one to the other.
Ntains Power Pack
1.8 This operates from 100-130V or 200-250 a.c. supplies with voltage selector and
input fuse accessible at the rear. A power cable and connector are supplied with
the instrument.
Battery Pack
1. 9 The Battery Pack Assembly contains eight 'D' size nickel cadmium cells arranged as
two
battery sections, each providing 5 volts. One section supplies 5 volts to the
counter and timebase circuits and the other section 5 volts to the display assembly. Built-in
charging facilities allow the batteries to be re-charged from an a.c. supply via the 3-pin plug
on the
rear panel, according to the position of the CHARGE/OPERATE switch. This switch
must
be set to OPERATE to use the instrument, and in this position the batteries wi II be
trickle-charged whenever the front panel switch is at OFF (provided the a.c. supply is
connected}.
Battery Charging
1.10 To obtain the full charging rate for the batteries the rear panel switch should be set
to CHARGE; the instrument is then inoperative. A red warning lamp on the rear panel
of the Battery Pack is illuminated whilst the batteries are being charged at the maximum rate.
A complete recharge at the full rate requires 14 hours. This charge rate cannot damage the
cells even if inadvertently left on for long periods. Persistent overcharging will, however, re
-duce the charge capacity of the batteries.
9059 VARIANT 1
This version is fitted with the Oscillator unit Type 9441 in place of the 9440, and is
supplied with an antenna clipped into the hinged hood. The following military type
numbers have been a II ocated :-
(a) Digital Frequency Period Meter 9059 Variant 1 (6625-99-628-5J23 )
(b) Ntains Power Unit (Option 08) (
6150-99-628-5325)
(c) Battery Power Unit ( Option 07) (6116-99-628-5324 )
1-2
9057/9059
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INTERNAL FUSE CHECK
2.1 To check the correct rating of the internal fuses refer to paragraphs 2.4 and 2.5.
lv\A.I NS PACK OPERATION
CAUTION:
fvA.ains voltages ore exposed if the case is removed.
2.2 (1) Ensure that the fuselink on the rear panel of the mains pock is correctly rated for
the mains supply voltage. (Pora.2.4).
(2) Fit a suitable power plug to the power lead supplied. The lead is coded as follows:-
Brown (or red) • • • • • •
Blue
{or block) •••••
Green/Yellow (or green)
•• Line
• • • NeutroI
. • • Earth (ground)
(3)
Connect the mains pock to the counter
1 taking
core to mote the 8-woy plug and
socket correctly
1
and tighten the two finger-screws.
(4)
Connect the mains supply.
(5) Switch on the instrument using the OFF/PERIOD/FREQUENCY lever switch on
the front panel. ·
BATTERY PACK OPERATION
2.3 (1) Ensure that the fuselinks in the battery pock ore correctly rated.
(2) Connect the battery pock to the instrument and tighten ,the two finger-screws.
(3)
Set the CHARGE/OPERATE switch on the Battery Pock to OPERATE.
(4) Switch on
the instrument using the OFF/PERIOD/FREQUENCY lever switch on
the front panel.
FUSELI NK DATA
2.4
Location: Ref:
fvA.ains Pock (internal) FS1
fvA.ains Pack (external) FS2
9057/9059
Rating:
2A
315mA (11 0/120V)
160mA (200/240V)
2-1
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location: Ref:
Battery Pack (external) FSl
Rating:
5A
High Speed
Decade Assy. FSl
lA ) Mounted on the Amplifier and
High Speed Decade Assy. FS2 lA
) High Speed Decade Assembly p.c.b.
REMOVING THE CASE
2.5 (1) Ensure that the mains supply is not connected.
(2) Place the instrument, front panel cover downward on a bench and use a suitable
screwdriver (posidriv) to remove the 6 screws located in the flange of the Front
Panel Assembly.
(3)
Carefully withdraw the instrument from the case.
NOTE: The battery or mains pack may be removed from the case by loosening the
two finger-tightened screws.
SELF-CHECK
2.6 The instrument has a self-check facility which is selected by the OPERATE/SELF-
CHECK
slide switch. In the SELF-CHECK position the switch feeds the 100kHz
reference signal from the frequency standard to the input amplifier. This permits performance
checks to be made for both frequency and period measurements using an input signal of known
frequency.
SELF-CHECK FREQUENCY
2.7 (1) Set the OFF/PERIOD/FREQUENCY lever switch to FREQUENCY.
(2)
Set the OPERATE/SELF-CHECK switch to SELF-CHECK.
(3) Using the four push-buttons on the front panel, select in turn each of the
available gate times (i.e. lOms, lOOms, ls and lOs) and check that the displays
are in accordance with Table 1 below.
9057/9059
TABLE 1
Self-Check (Frequency Displays)
Gate Times
lOms
lOOms
ls
lOs
Units
MHz
MHz
kHz
kHz
Display
00.1000
0.10000
1-00.000
00.0000
(with overflow
lamp iII
umi nated)
2-2
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SELF-CHECK PERIOD
2.8 (1) Set the OFF/PERIOD/FREQUENCY Meter to PERIOD.
(2)
Set the OPERATE/SELF-CHECK switch to SELF-CHECK.
(3) Using
the four push-buttons on the front panel select, in turn each of the
available numbers of periods over which the measurement is to be made and
check that the following displays are obtained.
TABLE 2
Self-Check (Period) Displays
Number
of Periods Units Display
1 Sec 0.00001
10 ms 000.010
100
ms
00.0100
1000 ms 0.01000
NOTE: In both cases check that the decimal point is correctly positioned. If the
above displays are not obtained the instrument should be investigated in
accordance with the procedures in Chapter 6 - iVai ntenance.
2-3
9057/9059
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FRONT PANEL CONTROLS
3.1 (1) Function Switch Model 9057: A three-position lever switch which selects OFF/
PERIOD/FREQUENCY.
Model 9059: A four-position lever switch which selects OFF/
PERIOD/FREQUENCY 1A1 /FREQUENCY •B•
A bank of four push-buttons which selects any oneofthefouravailablegate times
for frequency measurement or the number of periods for period measurements.
Frequency
(Gate Times}
lOms
0. 1s
1s
lOs
(2) OPERATE/SELF-CHECK
(3) SENSITIVITY (Attenuator}
Switch
(4) RESET Push-Button
(5) OVERFLOW Lamps
(6) CHARGE BATTERIES
Lamp
9057/9059
Period
(Number of Periods}
1
10
100
1000
A two position slide switch. In the lower position
(CHECK) the 100kHz check signal is applied as
the input signal. In the upper position (OPERATE)
the instrument operates normally for frequency or
period measurement.
A two-position slide switch which provides input
attenuation with sensitivities of 1 OmV and 1 OOmV
Model 9059 has an additional Sensitivity switch
for the Channel
1B1
input.
Operation of the Reset push-button resets the dis-
play to zero and clears the instrument to commence
a new measurement.
The overflow lamp lights when the display reading
exceeds 999999.
When this lamp comes •on• it indicates that the
instrument has ceased to function due to automatic
disconnection of the discharged bcftteries.
3-1
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(7) FREQUENCY STANDARD
Switch A
two-position slide switch. In the upper
position internal standard is selected, in the
lower position external standard input is
selected.
FRONT PANEL SOCKETS
3.2
(1) INPUT socket (Input •A•
on the 9059)
(2) FREQUENCY STANDARD
(3)
Input Socket Is·
A BNC coaxial socket for connection of the
1OHz-80MHz signal under test. On the 9059
two input sockets are provided. (See Input I s•).
A BNC socket which accepts a 1 MHz external
frequency standard when the FREQUENCY
STANDARD
switch is set to EXTERNAL. On
the Model 9059 a 1M Hz reference frequency
output, derived from the internal frequency
standard, is available at this socket when the
FREQUENCY STANDARD switch is set to
INTERNAL.
Model
9059 only. A BNC socket which
accepts the 40MHz- 560MHz input signal.
REAR PANEL COMPONENTS
3 .3 The power pack constitutes the rear portion of the instrument and the rear panel
details for the two types of pack are as follows:-
Mains Pack
Battery Pack
9057/9059
(a) Voltage Selector.
(b) Three-pin mains plug.
(c) Mains fuse.
(a) CHARGE/OPERATE Switch: this two-position toggle switch must be in the
OPERATE position to supply power to the instrument.
(b) Three-pin mains plug (for battery charging).
(c) Mains fuse.
3-2
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