Philips PM 5326 User manual

RF signal generator
lnstruction manual
9499 520 08002

Qservice ----- This Document is a complete scan from the Original Tektronix Manual ----- Qservice

Please note
In correspondence concerning this instrument, please quote the type number and serial number as given on the
type plate.
Bittebeachten
Bei Schriftwechsel ijber dieses Gerat wird gebeten, die Typennummer und die Geratenummer anzugeben. Diese
befindensich auf dem Typenschildan der Ruckseitedes Gerates.
Noter
s. v. p.
Dans votre correspondance et dans vos reclamations se rapportant
B cet appareil, veuillez toujours indiquer le
numero de type et le numerode serie qui sont marques sur
la plaquette de caracteristiques.
important
As the instrument
is an electrical apparatus, it may be operatedonly by trained personnel. Maintenance and repairs
may also be carriedout only by qualified personnel.
Wichtig
Da das Gerat ein elektrisches Betriebsmittel
ist, darf die Bedienung nur durch eingewiesenes Personal erfolgen.
Wartung und Reparatur durfen nur von geschultem, fach- undsachkundigemPersonal durchgefuhrtwerden.
l mportant
Comme I'instrument est un equipement Blectrique, le service doit &re assure par du personnel qualifie. De &me,
I'entretien et les reparationssont
B confier aux personnes suffisement qualifies.
@ Philipr GmbH - Hamburg - Germany - 1979
All rights are strictly reserved.
Reproduction or divulgation in any form whatsoever
is not permitted without written authority from the copyright owner.
Issued by Philips GmbH
- Werk fur Messtechnik
Printed in Germany

CONTENTS
GENERAL
lntroduction
Technical data
Accessories
Operatingprinciple
INSTALLATION
Safety regulations
Mounting
Earthing
Dismantlingthe instrument
Mains connection
OPERATING INSTRUCTION
Controls and sockets
Operationand application
Application examples
SERVICE PART
Circuit description
Access to parts
Check and adjustment
Check after repair and maintenance
Parts list
LIST OF FIGURES
Block diagram, complete
Frontview
Amplitude modulation
Frequencymodulation, adjustment of carrier frequency
Wobbling with adjustable frequency marker, adjustment of centre frequency (RFcenter)
Wobbling with adjustable frequency marker spectrum
Externalfrequency counter; generator for
1 kHz sine, 3 - 30 Hz
mains frequency with phase shifter
Frontview, mechanical parts
Top view
Bottomview
Unit
1
Unit 4
Unit
6
Unit 3
Unit 2
Unit 5
Overall circuit diagram
Circuit diagram: units
2, 3, 8, partsof unit 6
Circuitdiagram: units 1,4, 5, partsof 6
Unit 8

ALLGEMEINES
Einleitung
Technische Daten
Zubehor
Funktionsprinzip
VORBEREITUNGSANWEISUNGEN
SicherheitstechnischeHinweise
Aufstellen
Erden
Offnen des Gehauses
Netzanschluss
BETRIEBSANLEITUNG
Bedienungselementeund Anschlusse
Bedienungund Anwendung
Anwendungsbeispiele
1. Blockschaltbild, gesamt
2. Frontansicht
3. Amplitudenmodulation
4. Frequenzmodulation, Kalibrierung der Tragerfrequenz
5.
Wobbeln, mitverschiebbarer Frequenzmarke,Einstellungder Mittenfrequenz (RF center)
6. Wobbeln, mitverschiebbarem Frequenzmarkenspektrum
7.
Zahler fiir externe Frequenzen; Generatorfur 1 kHz sinus, fur 3 - 30 Hz A,
fur Netzfrequenzmit Phasenschieber

TABLE DES MATIERES
GENERALITES
Introduction
Caracteristiquestechniques
Accessoires
Principede fonctionnement
INSTALLATION
Consignes de securite
Montage
Mise
B la terre
Demontagede I'appareil
Branchementde I'appareil
MlSE ENSERVICE
Commandes et douilles
Foqctionnement et application
Exemplesd'application
RAPPEL DES FIGURES
Schema synoptique
Face avant
Modulation d'amplitude
Modulation de frbquence, reglage de la frequence porteuse
Wobbulation avec marquedecalable de frequence, reglage de la frequencecentrale
(RF center)
Wobbulation avec spectre decalable de reperes de frequence
Compteur des frequences externes; genbrateur pour
1 kHz sinus, 3 - 30 Hz A,
frequence secteur avec dephaseur

Operating manual

Qservice ----- This Document is a complete scan from the Original Tektronix Manual ----- Qservice

TECHNICAL DATA
General information:
On delivery from the factory, the instrument complies with the safety regulations of measuring and
control equipment. The information and warnings contained inthis instruction manual must be followed
by the user toensure safe operationand to maintainthe instrument in a safe condition.
- Only data with indicated tolerances or limits are guaranteed; data without tolerances are given only
for guidance.
- All specifications will be met after a warm-up time of 30 min. when keeping the instrument in a
constant mounting position.
-
Inaccuracies (absoluteor in %) relate to the indicatedreference value.
SPECIFICATIONS
R F Generator
Frequency range
Ranges
Frequency display
Error of the display
Temperature coefficient of the display
Temperature coeffiecientof the frequency
1.2.2. R F Sweep generator
Ranges
wave form
1.2.3. RF output
Attenuator
0,l
- 125 MHz
0.1 - O,25 MHz
0,25 - 0,5 MHz
0,5 - 1 MHz
1 - 2,5 MHz
2,5 - 5 MHz
5 - 10 MHz
10 - 25 MHz
25 - 50 MHz
50 - 125 MHz
5-digit LED display, red, 11mm high;
3 decimal points;
2 LEDs for dimension
kHz, MHz
< typical, +I digit
+5 x 1
O-~/OC at 23 OC f 20 OC
-
< 10-51°c
.4/.5
MHz
10111 MHz
36/41 MHz
751110 MHz
semi-rectangular
for all RF ranges and all sweep ranges
Connection: BNC connector RF OUT
Impedance: 75
G?
max. output voltage: 50 mV into 75 G?
Frequency response:< 2 2 dB (1dB typ.)
for all RF ranges
> 100dB total
0
- 80 dB continous
3 dB, 40 dB calibrated

1.2.4. Modulation
Modulationmodes
unmodulated
amplitude-modulated, AM
frequency-modulated, FM
Frequency response
Modulatingoutput MOD OUT
Amplitude modulation
unmodulated
AM, internal
AM, external
Frequency modulation
FM, internal
FM, external
1.2.5. Wobbulation
Ranges, wobbulation width
Frequency response
Wobble frequency, triangle
- Linearity error
Wobble frequency, sine-wave
Center frequency
Wobbulatingoutput SWEEP OUT
- Signal
- Frequency
- Amplitude
- Impedance
see also table inchapter
3.2.
all RF ranges and all sweep ranges
all RF rangesandall sweep ranges
sweep ranges
10111 and 751110 MHz
< 2 dB in .4/.5 and I011I MHz ranges
< 0.2 dB in 36/41 and 7511 10 MHz ranges
1 kHz sine, 2 V
resp. external modulatingsignal at MOD IN
all RF ranges and all sweep ranges
all RF ranges and all sweep ranges
Modulation frequency:
1 kHz sine
Modulation depth:
30 %
Modulation depth: 0-100%
Modulation coefficient: 200 mV110 % AM
3 dB bandwidth:
20 Hz - 20 kHz
Input impedance:
>10kR
10111
and 75 /I 10 MHz ranges
Modulation frequency:
1 kHz sine
Sweep
(A f) :
22,5 kHz
Modulation signal:
20 Hz - 60 kHz (3 dB)
Sweep
( A f) :
0 - 75 kHz
Modulation coefficient:
200 mV/&7,5 kHz
3 dB bandwidth: 20 Hz - 60 kHz
Input impedance:
>I0 k i-2
Range Width (A 2 f)
.4/.5 MHz 0 - 50 kHz
10/11 MHz 0-'1 MHz
36/41 MHz 0- 10MHz
751110 MHz 0- 1 MHz
< 0,2 dB in .4/.5 and 10111 MHz ranges
3 - 30 Hz, blanking duringfly-back
<5%
50160
Hz linefrequency, phase variable
adjustablewithinthe full ranges
triangle
si ne-wave
3 - 30 Hz
50160 Hz linefrequency
2,5 - 10,5 Vpp
2,5 - 10,5 Vpp
IkR IkR

1.2.6. Marker generator prepared by one of the RF SWEEP RANGE buttons
(indicator-LEDMARKER is illuminated);
switched in by button MARKER OFFION
variable frequency markers from RF generator, adjustedfrequency on the display
fixed frequencies for adjustable Range Marker distance
frequency marker spectrum
.4/.5 MHz 10 kHz
1011 1 MHz 100 kHz
36/41 MHz 1 MHz
7511 10 MHz 100 kHz
Marker mixing, superposition; (birdy-marker)
2 VPP
2 loop-through BNC connectors
> 500 k i2
Marker
Amplitude
Output
l mpedance
1 .2.7. Counter
Frequencyrange
Inputvoltage
l nput impedance
1.2.8. Power supply
Referencevalue
Nominalvalues
Frequencyrange
Power consumption
1.2.9. Environmentalconditions
Ambient temperature
Referencevalue
Nominalworking range
Safe operationtemperature range
Limits for storage andtransit
Relative humidity
Reference range
Nominalworking range
Air pressure
Referencevalue
Nominal working range
PM
5326:
1 - 999.99 kHz
50 mV - 50 V
I Ma
AC mains
PM
5326 X:
1 kHz - 99.999 MHz
30 mV - 50 V
1 MR
230 V
11 5 V/230 V selectable by solder links
48 - 63 HZ
I8 W
1013 mbar (2 760 mm Hg)
800 ... 1066 mbar (upto 2200 m height)

Air speed
Referencevalue
Nominalworking range
Operating position
Warm-uptime
1.2.10. Cabinet
Protectiontype (see DIN 40 050)
Protectionclass (see
I EC 348)
Overalldimensions
- height
- width
- depth
Weight
1.3. ACCESSORIES
1.3.1. Standard
1.3.2. Optional
normally upright on feet
or with handle fold down
30 min.
IP 20
class
1, protective conductor
140rnm
310 mm
330 mm
approx. 6.5 kg
Instruction manual
Fuse 250
mA delayed
PM 9537 Coaxcablewith impedancetransformer75a1300
PM 9075 Coax cable BNC
- BNC 75
PM 9072 Coax cable BNC +two 4 mrn plugs

1.4. OPERATING PRINCIPLE (FIG. 1)
1.4.1.
RF circuitry, amplitude modulation
The RF Generator produces the high frequency. The RF FREQUENCY RANGE push-button array
allows selecting the desired range, while the continuous contro! FREQUENCY SETTING determines
the exact frequency.
Via Switching Stage and Amplifier 1 the RF frequency
is fed to theAmplitude Modulator passing eihter
unmodulated or amplitude-modulated by the internal 1 kHz Oscillator or by extern MOD IN low fre-
quency due to the selectedpush-buttonsMODULATION.
The amplitude of the RF frequency is stabilized in the control circuit Amplitude with automatic gain
control= inthe feedback path.
The Output Amplifier can be interacted by the Output blankinkstage: when sweeping with the internal
triangle the RF-signalis blankedduring fly-back.
The RF ATTENUATION sets the output continuously from 0 to -80 dB, but the RF attenuator over-
more has two fixed stages of -3 dB and -40 dB.
1.4.2.
Sweep sectionand frequency modulation
The LF Sweep Generator produces and modulates high frequencies for the sweep ranges .4/.5, 10/11,
36/41, 751110 MHz, selected by push-buttons RF SWEEP RANGE. The waveform is semi-rectangular.
The carrier for the frequency modulation and the center frequency for the wobbulating ranges respec-
tively are set in FrequencySelection, activatedby RF SWEEP RANGE just mentioned and coarseand fine
adjusted by the doublecontinuous control RF CENTER.
Pressed button AMIFM activates frequency modulation of the ranges 10111 or 751110 MHz with 1 kHz
internal or with external signal via MOD INinput socket.
If one of the RF SWEEP RANGE buttons
is pressed, the frequency modulated or wobbulated high
frequency
is fed via the Switching Stage to the main RF output path.
Due to the different frequency ranges the maximum sweep width is adapted by RF SWEEP RANGE.
Control
RF WIDTH reduces the width.
The sweeping or wobbulating signal and the signal for X-deflexion of an indicator or oscilloscope at the
MODISWEEP OUT socket can be switched off by push-button SWEEP OFFION. Inthis case the modu-
latingsignal
is available at the output.
1.4.3. Frequency marker
The Marker Mixer superimposes the frequency of the RF Generator to the swept frequency of the RF
Sweep Generator. The low frequency beat
is filtered in the Band-pass Filter Amplifier 3 and fed to
the OUT-Y-IN socket for the Y-channel of an indicator (oscilloscope).Each frequency of the RF Gene-
rator can be used for frequency marker,
i. e. "travelling marker".
Pulling the button MARKER AMPL generates fixed markers with many harmonics. The fundamental
wave of the fixed marker
is selected by RF SWEEP RANGE. So a marker spectrum with suited distance
due tothe sweep range
is generated.
When using triangular sweep mode the square wave output of the LF Sweep Generator blanks the fre-
quency markers inthe Marker blanking-during fly-back.
1.4.4. Display circuitry
The frequency of the RF-Generator
is divided depending on the selected frequency range and fed to the
Counter Decoder Driver which
is controlled by the Time Base. The Time base, i. e. one measuringperiod
for the counter,
is changed by the chosen frequency range. The stage of the counter at the end of one
measuring period representsthe frequency which is multiplex-displayed on the 5-digitdisplay.
Push-button COUNTER EXT enables the display circuitry working as normal counter. Amplifier
5 feeds
the signal at the COUNTER INsocket directly to the counter, decoder and driver.
1.4.5. Power supply
The -power suppb. provides the stabilized DC voltages of
+5 V, +I2 V, -12 V and +27 V, and the
sinusoidalwobbulating voltage.

INSTALLATION
SAFETY REGULATIONS
Upon delivery, the instrument complies with the required safety regulations. To maintain this condi-
tion and to ensure safe operation,
it is recommendedto follow the instructionsbelow.
2.1.1. Beforeconnecting
Mainsvoltage
Check whether the instrument
is adapted to the nominalmainsvoltage.
Protection
This instrument
is protected according to class I (protectiveearth) of the l EC 348 or VDE 041 1. The
mains cable provides earth connection. Outside specially protected rooms, the mains plug must be con-
nectedonly tosockets with earthed contact.
It is notallowedto interrupt the earth connectioninside or outside the instrument.
2.1.2. Maintenanceand repair
Failure and excessive stress
Ifthe instrument
is suspected of being unsafe, take it out of operation permanently.
This is the case when the instrument
- shows physicaldamage
- does notfunction anymore
- is stressed beyondthe tolerable limits (e.g. duringstorage and transportation)
Dismantlingthe instrument
When removingcovers or other parts by means or tools, live parts or terminals could be exposed. Before
openingthe instrument,disconnect itfrom all power sources.
If the open live instrument needs calibration, maintenance or
a repair, it must be performed only by
trained personnel being aware of the risks. After disconnection from
all power sources, the capacitors
inthe instrumentmay remain chargedfor some seconds, observe the circuit diagrams.
Fuses
Only use the specified fuses.
Repair, Replacingparts
Repairs must be made by trained personnel. Ensure that the construction of the instrument
is not altered
to the detriment of safety. Above all, leakage paths, air gaps and insulation layers must not be reduced.
When replacing, use only original parts. Other spare parts are only acceptable when the safety precau-
tions for the instrumentare not impaired.

MOUNTING
The instrument may be used inany desired position. With the handlefold down, the instrumentmay be
used in sloping position; for this purpose pressthe buttons A of the handle (Fig. 2). Do not position the
instrumenton any surface which produces or radiates heat, or indirect sunlight.
EARTHING
Before switching on, the instrument must be earthed in conformity with the local safety regulations.
The mains cable fixed to the instrument includes
a protective conductor, which is connected to the
earth contacts of the plug. Thus, when connected to an earthed mains socket, the cabinet of the instru-
ment
is consequently connectedto the protectiveearth.
WARNING: Connect the mains cable plug only to
a socket with protective earth contacts. This pro-
tection must not be made ineffective,
e. g. by using an extension cable without earth
protection!
The circuit earth potential applied to the external contacts of BNC sockets
is connectedto the cabinet.
The external contactsof the BNC sockets must not be used to conpect aprotectiveconductor.
DISMANTLINGTHE INSTRUMENT
- Unplugthe mainsconnector
- Foldup the handletothe top. For this push the buttons A (Fig. 2)
- Loosenthe centralscrew at the rear
- Remove the lead-throughof the mainscable from the cabinet
- Dismantlethe cabinet
MAINSCONNECTION
The instrument must be connected only to an AC supply. On delivery the instrument is set to 230 V.
Before mains connection, ensure that the local mains voltage ranges within the set mains voltage range
indicatedon the plate at the rear of the instrument.
Ifthe instrument
is to be used on 11 5 V supply, proceedas follows:
- Unplugthe mainsconnector
- Dismantlethe instrument,see 2.4.
- Resolder links on the mains transformer in accordance with the stick-on connection diagram. See
also below.
- Insertthe suppliedfuse 250 mA delayed intothe fuse holder insteadof the one built-in
- Change the mains voltage plate at the rear of the instrument in accordance with the mains voltage
selected. This plate for
11 5 V is insertedintoaplastic cover
- Close the instrument
Mains connection must
be made in accordance with the local safety regulations. This implies that the
instrument
is connectedto mains socket with protectiveearth contact (see para. 2.3.).

3. OPERATING INSTRUCTIONS
3.1.
CONTROLS AND SOCKETS (FIG. 2)
Legend Position Function
3.1.I. Frequency
RF FREQUENCYRANGE
.I - ... - 125MHz
FREQUENCYSETTING
RF ATTENUATION
0/30/40 dB
RF ATTENUATION
0
- 80 dB
RF OUT
Display
kHz, MHz
3.1 -2. Modulation
MODULATION
C
C
OFFION
AM/FM
I NT/EXT
MOD IN
MODISWEEP OUT
SWEEP
RF CENTER
3.1.3. Sweep
RF SWEEP RANGE
.4/.5 MHz
10/11 MHz
36/41 MHz
751110 MHz
SWEEP
OFFION
SWEEP
A
N
801.2 to pushbuttonsfor selecting the frequency range
801.10
knobfor continuousfrequency adjustment
rotary switch for settingthe fixed attenuation
knobfor continuous attenuation adjustment
BNC output socketfor RF signal
5-digit LED frequency display;
2 LEDsfor dimension
802 pushbuttons; change-overcontacts
not pressed
pressed
802.1 unmodulated modulated
802.2 amplitude-modulated frequency-modulated
802.3 internal external
816 BNC inputsocket for external modulationvoltage
815 BNC output socket for modulationsignal
603 dual-knob (coarse,fine) for continuouscarrier adjustment
pushbuttons; change-overcontacts
not pressed
pressed
802
802.7 AM -IF
802.8 frequency
mod. prepared FM
- IF
802.9 TV
- IF
802.10 frequency mod. prepared FM (band2)
802.5 wobbling
802.6 triangular wobbling wobbling
at
linefrequency

Legend Position Function
SWEEP
RF CENTER
SWEEP
RF WIDTH
SWEEP
LF FREQUENCY
PHASE
SWEEP
LF AMPLITUDE
SWEEP OUT
3.1.4. Frequency markers
MARKER
OFFION
MARKER
MARKER AMPL
605
PULL FOR FIXEDMARKERS 605
IN-Y-OUT 813,814
3.1.5. Counter
COUNTER EXT
COUNTER IN
3.1.6. 1 kHz sine-wavegenerator
MODISWEEPOUT
3.1.7. Trianglegenerator
SWEEP OUT
LF AMPLITUDE
3.1.8. Power supply
POWER
ON o @OFF
dual-knob(coarse, fine) for continuousadjustment
of the centre frequency of the wobbling range
knobfor continuousadjustment of the wobbling width
knobfor continuousfrequency adjustment on trian-
gular wobblingor phase adjustment on wobblingat line
frequency
knobfor continuousadjustment of the wobbling voltage
BNC output socket for the wobble signal
pushbuttonfor operationwith frequency markers
LED for operationwith markers
knobfor continuousadjustment of marker amplitude
pull switch for addingfixedfrequencies
2 BNC sockets:
- output socket for marker signal
- mixingdevice for superpositionof test object output
signal with marker signal
801 .I
commutator for frequency counter mode
81 2 BNC counter input socket
81 5
BNC output socket for 1 kHz sine wave
81 5
BNC output socket for triangle signal of sweep generator
602
knobfor continuousamplitudeadjustment
851 mains switch:
white dot for ON position