Marconi 52017-900K User manual

c
Operating Manual
H 52017-9OOK
Vol. I
lOkHz-1024MH~
AM/FM SIGNAL GENERATOR
2017
Code No. 52017-900K
0
1980
MARCONI INSTRUMENTS LIMITED
ST. ALBANS HERTFORDSHIRE ENGLAND
May 90 (Am. 6) Part no. 46881-388D
Print code : 5 - 5/90, MI 0.5~
Page (i)

H 52017-900K
Vol. 1
CONTENTS
PRELIMIFJARI ES
Title page
Contents
Notes and cautions
CHAPTERS
1 General information
2 Installation
3 Operation
4 - 1 Brief technical description
4
- 2 Technical description
5 Maintenance
6 Replaceable parts
7 Servicing diagrams
These chapters are contained
in a separate volume available
as an optional extra.
HAZARD WARN I FIG SY MEOLS
The following sqrmbols appear on the equipment.
symbo z Type of hazard Reference in manual
A Static sensitive device Page (iv)
A Incorrect adjustment Chap. 3 , para. 30
Page (iv)
A beryllia
A AC voltages Page (iv)
C omponent con t a i ning
Note.. .
Each page bears the date of the original issue or the code number and
date
of the latest amendment (Am.1, Am.2 etc.). New or amended material
of technical importance introduced by the latest amendment is indicated
by triangles positioned thus
change.
..... to show the extent of the
When
8 chapter is reissued the triangles do not appear.
Any changes subsequent to the latest amendment state
of the manual are
included on inserted sheets coded C1, C2 etc.
J
Page (ii)
Dec. 80

H 5201 7-900K
Vol. 1
NOTES AND CAUTIONS
1
ELECTRICAL SAFETY PRECAUTIONS
This equipment is protected in accordance with IEC Safety Class 1.
It has been
The following pre
-
designed and tested according to IEC Publication 348, 'Safety Requirements for Electronic
Measuring Apparatus', and has been supplied in a safe condition.
cautions must be observed by the user to ensure safe operation and to retain the equip
-
ment in a safe condition.
Defects and abnormal stresses
Whenever
it
is likely that protection has been impaired, for example as a result of
damage caused by severe conditions of transport or storage, the equipment shall be made
inoperative and be secured against any unintended operation.
Removal of covers
Removal of the covers is likely to expose live parts although reasonable precautions
have been taken
in the design of the equipment to shield such parts.
shall be disconnected from the supply before carrying out any adjustment, replacement or
maintenance and repair during which the equipment shall be opened.
maintenance or repair under voltage is inevitable
it shall only be carried out by a
skilled person who is aware of the hazard involved.
The equipment
If any adjustment,
Note that capacitors inside the equipment may still be charged when the equipment
has been disconnected from the supply. Before carrying out any
work inside the equip -
ment , capacitors connected to high voltage points should be discharged; to discharge
mains filter capacitors, if fitted, short together the
L (live) and N (neutral) pins of
the mains plug.
Mains plug
The mains plug shall only be inserted
in a socket outlet provided with a protective
earth contact.
lead without protective conductor.
or outside the equipment is likely to make the equipment dangerous.
The protective action shall not be negated by the use of an extension
Any interruption of the protective conductor inside
Fuses
Note that there is a supply fuse in both the
live and neutral wires of the supply
lead.
remain at supply potential.
If only one of these fuses should rupture, certain parts of the equipment could
To provide protection against breakdown
of the supply lead, its connectors, and
filter where fitted, an external supply fuse (e.g. fitted
in the connecting plug) should
be used in the
live lead. The fuse should have a continuous rating not exceeding 6 A.
Make sure that only fuses with the required rated current and of the specified type
are used for replacement.
holders shall be avoided. The use of mended fuses and the short
- circuiting of fuse
July 83 (Am. 3)
Page (iii)

H 52017-900K
Vol. 1
CAUTIOfV : STAT'IC SENSITIVE COMPONENTS
Components identified with the symbol
parts lists are static sensitive devices.
also indicated
in the equipment by orange discs, flags or labels bearing the
same symbol.
components being permanently damaged by static charges or fast surges.
(I)
on the circuit diagrams andfor
The presence of such devices is
Certain handling precautions must be observed to prevent these
If a printed board containing static sensitive components (as indicated
by a warning disc or flag) is removed, it must be temporarily stored in
a conductive plastic bag.
(2) If a static sensitive component is to be removed or replaced the follow -
ing anti - static equipment must be used.
A work bench with an earthed conductive surface.
Metallic tools earthed either permanently or by repeated discharges.
A low - voltage earthed soldering iron.
An earthed wrist strap and a conductive earthed seat cover for the
ooerator. b7hOSe outer clothing must not be of man - made fibre.
- -
(3)
As a general precaution, avoid touching the leads of a static sensitive
component.
until it is required €or use.
When handling a new one, leave it in its conducting mount
This equipment is fcrmed from metal pressings and although every endeavour
has been made to remove sharp points and edges care should be taken, parti -
cularly when servi.sing the equipment, to avoid minor cuts.
VARNIi'JG : TOXIC: HAZARD
Many of the electr,,nic components used in this equipment employ resins and
other chemicals
which give off toxic fumes on incineration.
precautions should i herefore be taken in the disposal of these items.
Bcryllia (beryllium oxide) is used in the construction of the following
Appropriate
A -- - /, components in this squipment :
BERYLLIA
. . . . . . . . YP.i.t. .M?. f . T.r.wi 8 f9T.S. .?W. ?PP. .%?6.. . . . . . . .... . .
This material, when in the form of fine dust or vapour and inhaled into the
lungs, can cause
a respiratory disease.
it can be handled quite safely although it is prudent to avoid handling con -
ditions which promote dust formation by surface abrasion.
Because
of this hazard you are advised to be very careful in removing and
disposing of these components.
or domestic waste
or despatch them by post. Tliey must be separately and
securely packed and clearly identified
to show the nature of the hazard and
then disposed of
in a safe manner by an authorized toxic waste contractor.
In its solid form, as used here,
Do not put them ir! the general industrial
WARNING : AC QOLTAGES
A
Disconnect mains lead before removing thc cover of Unit AP1 for either
access or adjustment, for details see Control circuit power supply
(API)
Chap. 4 - 2 Technical description.
d
4
4
Page (iv)
Dec. 80

H 52017-900K
Vol. 1
Chapter 1
GENERAL I NFORMAT I ON
CONTENTS
Para.
1 Features
7 Tuning
9 output
10 Modulation
16 Performance data
16 Carrier frequency
17 Frequency sweep
18 RF output
19 Amplitude modulation
20 Frequency modulation
21 Internal modulation oscillator
22 Pulse modulation
23 Frequency counter
24 Internal reference standard
25 Spurious signals
26 Auxiliary facilities
27 Power requirements
28 Safety regulations
29 Radio frequency interference
30 Limit range of operation
31 Conditions of storage and transport
32 Dimensions and weight
33 Accessories
Fig. Page
I 1 10 kHz to 1024 MHz AM/FM Signal Generator 2017 ... ... ... 2
.. , 7
2 Sideband noise curves ... ... ... *.. ...
FEATURES
1. 2017 is a stable, low noise a.m./f.m. signal generator coverins the fre -
quency range 10 kHz to 1024 MHz.
of required settings via a keyboard with the alternative of using rotary con -
trols to adjust carrier frequency and output level.
ensures maximum flexibility and allows programming by the General Purpose
Interface Bus
(GP'IB)*. It is therefore equally suitable for use as a manually
operated bench mounted instrument or as part
of a fully automated test system.
Front panel operation
is by direct entry
Microprocessor control
I
*
GPIE - Marconi Instruments General Purpose Interface Bus in accordance
with IEEE Standard 488 - 1 978 and IEC Publication 625-1.
Sep, 82 (Am. 2)
Chap. 1
Page 1

H 5201 7-900K
Vol. 1
Fig. 1
IQ khk to 1024 MHz AM/FM Signat Generator 2017
2. Output levels from 0.2 pV to 4 V e.m.f. are available in the C.W. or f.m.
modes (up to 2 V e.m.f. in the a.m. mode) and the user is offered a choice of
five output level calibrations which are switch selectable on the froht panel.
3. Frequency stability in the locked mode is determined by a high quality
reference oscillator within the instrument and facilities are provided for
the use of an external reference when this is preferred.
4.
using either an internal modulation oscillator or an external source.
quality pulse modulation and slow sweep facilities are also provided.
Comprehensive amplitude and frequency modulation facilities are provided
High
5.
stored and recalled for later use.
Memory facilities allow up to ten complete instrument settings to be
6.
external signals in the range 10 Hz - 512 MHz.
The frequency counter display can also be used for the measurement of
Tuning
7. In the manual mode the frequency display gives an active indication of
the output frequency. Tuning takes place by means of the
RANGE selector
switch and the rotary
TUNE and FINE TUNE front panel controls. Depressing
the LOCK key reverts the system to a synchronizer whose setting
will be the
last measured frequency indicated
on the display.
8. Accuracy is within +2 parts in 107 over the temperature range of 0 to 40 C.
An external frequency standard of 1 MHz may be used where better stability is
required or to ensure consistency when a number of instruments are used in an
0
d
area.
Chap.
1
Page 2
Jan. 88 (Am. 5)

H 52017-900K
Vol. 1
1
output
9.
by rotary control if preferred.
RF levels can be set by means of the keyboard control or varied manually
Modulation
10.
giving a choice of two fixed frequencies, 400 Hz and 1 kHz, and a further
3 variable ranges from 20 Hz to 20 kHz which are controlled from the front
panel MODULATION OSCILLATOR controls.
Frequency and amplitude modulation are provided by the internal oscillator
PERFORMANCE DATA
Characteristic
Carrier frequency
c
c
16. Range
Se 1 ec t ion
Manual
:
Keyboard :
Indication
Resolution
Accuracy
Unlocked
:
Locked :
Performance
10 kHz - 1024 MHz in 9 ranges.
(1) 10 kHz to 4 MHz
(2) 4 MHz to 8 MHz
(3) 8 MHz to 16 MHz
(4) 16 MHz to 32 MHz
(5) 32 MHz to 64 MHz
(6) 64 MHz to 128 MHz
(7) 128 MHz to 256 MHz
(8) 256 MHz to 512 MHz
(9) 512 MHz to 1024 MHz
Frequencies may be selected manually using
the
11 turn main tuning control with
separate 3 turn fine tune control.
Keyboard provides for entry of up to
8 significant digits, decimal point and
frequency units.
A manually tuned
frequency may be locked by pressing the
LOCK key.
74 digit, LED seven segment display.
10 Hz up to 128 MHz.
100 Hz above 128 MHz.
Refer to frequency counter accuracy.
Relative to the reference frequency.
The output frequency will be within
+I x 10-7 +1 Hz of the indicated
frequency.
May
90 (Am. 6)
Chap. 1
Page 3

H 52017-900K
Vol. I
Stabili tv
Locked mode :
.-/
Refer to the accuracy spec if ication and
to the internal reference standard
specification. Less than
7 seconds is
required for the generator to regain
frequency lock after a frequency change
is made.
Frequency sweep
17. Sweep rate :
Horizontal ou tDu t :
RF outDut
18. Level
Se lec t i on
Manual
:
Keyboa.rd :
Indicaition :
Total level accuracy
(for levels, above
1 pV p.d. )
Ou tDu t impedance
RF leakage
Reverse power protection
Single shot sweep for use with
X-Y plotter.
Maximum sweep width one carrier frequency
range.
30 - 150 seconds for a full range
sweep adjustable by a front panel control.
1 - 9 V over one frequency range,
d
0.13 pV to 4 V e.m.f. ( - 131 to +I9 dBm)
c.w., f.m. and pulse mode.
0.13
pV to 2 V e.m.f. ( - 131 to +I3 dBm)
a .m.
Two concentric knob controls : switched
coarse attenuator with
6 dB steps and a
continuously variable fine attenuator
with
8 dB range.
Allows entry of up to
4 significant digits,
decimal point, sign and units.
34 digit, LED, seven segment display with
illuminated legend showing e.m.f., p.d.,
dBpV e.m.f., dBpV p.d. and dBm. Units
are selected by a front panel switch.
tl dB up to 512 MHz.
+2 dB up to 1024 MHz.
50 R; VSWR <I .15: 1 up to 256 MHz,
<1.25:1 up to 512 MHz,
<1.35:1 up to 1024 MHz at r.f.
output levels below 0.5 V e.m.f.
Less than 1 pV generated in a 50 R load by
a
2 turn 25 rmn loop, lOOmm or more from
the case of the generator.
Protects the generator output system against
accidental reverse power from a transmitter
of up
to 50 W capacity, 10 kHz - 1024 MHz
or applied d.c. of up to +40 V.
Chap. 1
Page 4
May 90 (Ani. 6)

H 52017-900K
Vol. 1
I Amplitude modulation
I
19. Carrier frequency range 10 kHz - 400 MHz, usable to 1024 MHz.
Modulation depth Up to 99% in 1% steps. 2 digits, LED
seven segment display.
keyboard or remote programming.
Entered via the
Accuracy
Better than +3% depth up to 80% depth.
mz modulation rate)
Envelope distortion Less than 2% t.h.d. up to
30% depth.
(using internal
1 kHz Less than 3.5% t.h.d. up to 80% depth.
External modulation
modulation oscillator)
Frequency range
:
(For carrier frequencies
10 kHz to 512 MHz):
(For carrier frequencies
512 MHz to 1024
MHz):
Frequency response:
(For carrier frequencies
10 kHz to 512 MHz)
(For carrier frequencies
512 MHz to 1024 MHz)
Input level :
Frequency modulation
20. Deviation
Accuracy
Distortion
External modulation
Frequency range
(For carrier frequencies
10 kHz to 512
MHz):
b
c
(For carrier frequencies
512 MHz to 1024
MHz):
Jan. 88 (Am. 5)
20 Hz to 125 kHz (d.c. coupled) at maximum
deviation and up to 260 kHz at half maximum
deviation.
20 Hz to 30 kHz (d.c. coupled).
- 10.5 dB from20 Hz to 125 kHz in levelledmode;
+O .3 dB from 20 Hz to 125 kHz inunlevelled mode.
k0.5 dB from20 Hz to 30 kHz inlevelledmode;
k0.3 dB from 20 Hz to 30 kHz inunlevelledmode.
0.5 V - 1.5 V r.m.s. into 600 fi to set
reference
level, indicated by an illumi -
nated legend in the levelled mode only.
1 V r,m.s. into 600 Q to set reference
level in unlevelled mode.
Entered via the keyboard or remote pro
-
gramming. 3 digits, LED, 7 segment display.
RF range Maxim deviation
40 kHz
40 kHz
80 kHz
160 kHz
320 kHz
640 kHz
1.28 MHz
2.56 MHz
200 kHz
- 14% of deviation selected +50 Hz.
Using the internal 1 kHz fixed modulation
oscillator, less
than 2% t.h.d. at maxi -
mum deviation on each r.f. range.
20
Hz to 125 kHz (d.c. coupled) at maximum
deviation and up to
260 kHz at half maximum
deviation.
20
Hz CO 30 kHz (d.c. coupled).
4
Chap. 1
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H 52017-900K
Vol. 1
b Frequency response :
Input level :
Internal modulation oscillator
21. Frequency
Accuracy
Pulse modulation
20.5
dB over specified frequency range in
levelled mode.
20.3 dB over specified frequency range in
d’
unlevelled mode. 4
0.5 V - 1.5 V r,m.s. into 600 Q to set
reference level, indicated by an
illumi -
nated legend in the levelled mode only.
1 V r.m.s. into 600 Q to set reference
level in unlevelled mode.
20
Hz to 20 kHz, continuously variable in
3 decade ranges. Also 2 fixed frequen -
cies, switch selected, of 400 Hz and 1 kHz.
+5% for fixed frequencies.
22. Carrier frequency range
4 MHz to 1024 MHz.
Pulse/carrier rise time Less than 25 ns for carriers above 25 MHz-
Pulse duration
-
100 ns to infinity.
Carrier suppression Better than 70
dB up to 80 MHz,
46 dB up to 512 MHz.
Additional carrier level error k2 dB.
Input characteristic Positive
- going modulation up to +I V input.
Saturation level +1.1
V. Maximum input
+5 V. Input impedance 50 R. Effective
bandwidth d.c. to 15
MHz reduced below
25
MHz carrier.
Frequency counter (external mode)
23. Frequency range 10 Hz to 520 MHz.
-
Re so 1 ut ion
Sen s it ivi ty
1 Hz from 10 Hz to 10 MHz,
10 Hz from 1 MHz to 100 MHz,
100 Hz from 10 MHz to 520 MHz.
100 mV p.d. into
50 Q, 1 MHz to 520 MHz.
200 mV p.d. into
1 MQ, 10 Hz to 10 MHz.
Ac curac Y 21 digit + reference standard error.
Chap.
1
Page 6
Jan. 88 (Am, 5)