philips Pm5326电路图.pdf

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1、RF signal generator lnst ruction manual 9499 520 08002 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 Qservice - This Document is a complete scan from the Original Tektronix Manual - Qservice RadioFans.CN 收音机爱 好者资料库 Please note In correspondence concerning this instrument, please quote the type num

2、ber and serial number a s given on the type plate. Bitte beachten Bei Schriftwechsel ijber dieses Gerat wird gebeten, die Typennummer und die Geratenummer anzugeben. Diese befinden sich auf dem Typenschild an der Ruckseite des Gerates. Noter s. v. p. Dans votre correspondance et dans vos reclamation

3、s s e rapportant B cet appareil, veuillez toujours indiquer le numero de type et le numero de serie qui sont marques sur la plaquette de caracteristiques. important As the instrument is an electrical apparatus, it may be operated only by trained personnel. Maintenance and repairs may also be carried

4、 out 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- und sachkundigem Personal durchgefuhrt werden. l mportant Comme Iinstrument est un equipeme

5、nt Blectrique, le service doit generator for 1 kHz sine, 3 - 30 Hz mains frequency with phase shifter Front view, mechanical parts Top view Bottom view Unit 1 Unit 4 Unit 6 Unit 3 Unit 2 Unit 5 Overall circuit diagram Circuit diagram: units 2, 3, 8, parts of unit 6 Circuit diagram: units 1,4, 5, par

6、ts of 6 Unit 8 ALLGEMEINES Einleitung Technische Daten Zubehor Funktionsprinzip VORBEREITUNGSANWEISUNGEN Sicherheitstechnische Hinweise Aufstellen Erden Offnen des Gehauses Netzanschluss BETRIEBSANLEITUNG Bedienungselemente und Anschlusse Bedienung und Anwendung Anwendungsbeispiele 1. Blockschaltbil

7、d, gesamt 2. Frontansicht 3. Amplitudenmodulation 4. Frequenzmodulation, Kalibrierung der Tragerfrequenz 5. Wobbeln, mit verschiebbarer Frequenzmarke, Einstellung der Mittenfrequenz (RF center) 6. Wobbeln, mit verschiebbarem Frequenzmarkenspektrum 7. Zahler fiir externe Frequenzen; Generator fur 1 k

8、Hz sinus, fur 3 - 30 Hz A , fur Netzfrequenz mit Phasenschieber TABLE DES MATIERES GENERALITES Introduction Caracteristiques techniques Accessoires Principe de fonctionnement INSTALLATION Consignes de securite Montage Mise B la terre Demontage de Iappareil Branchement de Iappareil MlSE EN SERVICE Co

9、mmandes et douilles Foqctionnement et application Exemples dapplication RAPPEL DES FIGURES Schema synoptique Face avant Modulation damplitude Modulation de frbquence, reglage de la frequence porteuse Wobbulation avec marque decalable de frequence, reglage de la frequence centrale (RF center) Wobbula

10、tion 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 informat

11、ion: On delivery from the factory, the instrument complies with the safety regulations of measuring and control equipment. The information and warnings contained in this instruction manual must be followed by the user to ensure safe operation and to maintain the instrument in a safe condition. - Onl

12、y 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 (absolute or in %) relate to the indicated refe

13、rence value. SPECIFICATIONS R F Generator Frequency range Ranges Frequency display Error of the display Temperature coefficient of the display Temperature coeffiecient of 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

14、 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, 11 mm high; 3 decimal points; 2 LEDs for dimension kHz, MHz typical, +I digit +5 x 1 O-/OC at 23 OC f 20 OC - 1 0-51c .4/.5 MHz 1011 1 MHz 36/41 MHz 7511 10 MHz semi-rectangular for all RF

15、ranges and all sweep ranges Connection: BNC connector RF OUT Impedance: 75 G? max. output voltage: 50 mV into 75 G? Frequency response: 100 dB total 0 - 80 dB continous 3 dB, 40 dB calibrated 1.2.4. Modulation Modulation modes unmodulated amplitude-modulated, AM frequency-modulated, FM Frequency res

16、ponse Modulating output MOD OUT Amplitude modulation u nmodulated 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 Wobbula

17、ting output SWEEP OUT - Signal - Frequency - Amplitude - Impedance see also table in chapter 3.2. all RF ranges and all sweep ranges all RF ranges and all sweep ranges sweep ranges 1011 1 and 7511 10 MHz 2 dB in .4/.5 and I011 I MHz ranges 1 0 k R 1011 1 and 75 /I 10 MHz ranges Modulation frequency:

18、 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/ for this purpose press the buttons A of the handle (Fig. 2). Do not position the instrument on any surface which produces or radiates heat, or in direct sunlight. EAR

19、THING 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 th

20、e instru- ment is consequently connected to the protective earth. 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

21、the external contacts of BNC sockets is connected to the cabinet. The external contacts of the BNC sockets must not be used to conpect a protective conductor. DISMANTLING THE INSTRUMENT - Unplug the mains connector - Fold up the handle to the top. For this push the buttons A (Fig. 2) - Loosen the ce

22、ntral screw at the rear - Remove the lead-through of the mains cable from the cabinet - Dismantle the cabinet MAINS CONNECTION 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

23、 the set mains voltage range indicated on the plate at the rear of the instrument. If the instrument is to be used on 11 5 V supply, proceed as follows: - Unplug the mains connector - Dismantle the instrument, see 2.4. - Resolder links on the mains transformer in accordance with the stick-on connect

24、ion diagram. See also below. - Insert the supplied fuse 250 mA delayed into the fuse holder instead of 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 inserted into a plastic cover - Close the ins

25、trument Mains connection must be made in accordance with the local safety regulations. This implies that the instrument is connected to mains socket with protective earth contact (see para. 2.3.). 3. OPERATING INSTRUCTIONS 3.1. CONTROLS AND SOCKETS (FIG. 2) Legend Position Function 3.1 .I. Frequency

26、 RF FREQUENCYRANGE .I - . - 125 MHz FREQUENCY SETTING 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/E XT MOD IN MODISWEEP OUT SWEEP RF CENTER 3.1.3. Sweep RF SWEEP RANGE .4/.5 MHz 10/11 MHz 36/41 MHz 7511 10 MHz SWEEP O

27、FFION SWEEP A N 801.2 to pushbuttons for selecting the frequency range 801.10 knob for continuous frequency adjustment rotary switch for setting the fixed attenuation knob for continuous attenuation adjustment BNC output socket for RF signal 5-digit LED frequency display; 2 LEDs for dimension 802 pu

28、shbuttons; change-over contacts not pressed pressed 802.1 unmodulated modulated 802.2 amplitude-modulated frequency-modulated 802.3 internal external 816 BNC input socket for external modulation voltage 81 5 BNC output socket for modulation signal 603 dual-knob (coarse, fine) for continuous carrier

29、adjustment pushbuttons; change-over contacts not pressed pressed 802 802.7 AM -IF 802.8 frequency mod. prepared FM - IF 802.9 TV - IF 802.1 0 frequency mod. prepared FM (band 2) 802.5 wobbling 802.6 triangular wobbling wobbling at line frequency Legend Position Function SWEEP RF CENTER SWEEP RF WIDT

30、H SWEEP LF FREQUENCY PHASE SWEEP LF AMPLITUDE SWEEP OUT 3.1.4. Frequency markers MARKER OFFION MARKER MARKER AMPL 605 PULL FOR FIXED MARKERS 605 IN-Y-OUT 813,814 3.1.5. Counter COUNTER EXT COUNTER IN 3.1.6. 1 kHz sine-wave generator MODISWEEP OUT 3.1.7. Triangle generator SWEEP OUT LF AMPLITUDE 3.1.

31、8. Power supply POWER ON o OFF dual-knob (coarse, fine) for continuous adjustment of the centre frequency of the wobbling range knob for continuous adjustment of the wobbling width knob for continuous frequency adjustment on trian- gular wobbling or phase adjustment on wobbling at line frequency kno

32、b for continuous adjustment of the wobbling voltage BNC output socket for the wobble signal pushbutton for operation with frequency markers LED for operation with markers knob for continuous adjustment of marker amplitude pull switch for adding fixed frequencies 2 BNC sockets: - output socket for ma

33、rker signal - mixing device for superposition of 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 8 1 5 BNC output socket for triangle signal of sweep generator 602 knob for continuous a

34、mplitude adjustment 851 mains switch: white dot for ON position OPERATION AND APPLICATION Mode of operation - Betriebsarten - Mode doperation Fig. 7 + M C OFF , 0 N 0 ULATIC AM FM o - - INT . E XT WOBBULATION AARKER requency IFF, I N e iENER. carrier frequency AMPL, PULL marker distance 10 kHz 100 k

35、Hz 1 MHz 100 kHz RF signal generator, unmodulated All push-buttons are off exceptthe concerning one of the RF FREQUENCY RANGE (fig. 3). The figure only contains the controls, function blocks, inputs and outputs which take active part of the applications. RF signal generator, amplitude modulated As 3

36、.2.1., button MODULATION OFFION pressed. The set carrier is modulated by 1 kHz to 30 % depth. As 3.2.2. button MODULATION INIEXT pressed. The set carrier is modulated by the NF voltage fed in via MOD IN. At socket MOD OUT the external modulating voltage is available. RF signal generator, frequency m

37、odulated All push-buttons are off except the concerning one of the RF SWEEP RANGE 1011 1 or 7511 10 and the buttons for modulation OFFION and AMIFM (fig. 4). The carrier, fixed or to be set , is frequency modulated by 1 kHz. As 3.2.3. and button MODULATION INIEXT pressed. The set carrier is frequenc

38、y modulated by the NF voltage, fed in via MOD IN. At the socket MOD OUT the NF voltage is available. Note! Adjustment of the carrier frequency see fig. 4 3.2.4. Wobbulator with variable frequency marker All push-buttons are off except the concerning one of the RF SWEEP RANGE, SWEEP OFFION and MARKER

39、 OFFION (fig. 5). It is swept about the center frequency, which is chosen by button RF SWEEP RANGE and set by RF CENTER. The sweep width is pre-determined due to the range and can be varied by control RF WIDTH. The sweep frequency of the A L F signal is set by LF FREQUENCY. During fly-back the outpu

40、t ampli- fier and marker mixer are blanked. During sweep the marked band-pass can be seen on an indicator. The altitude of the marker is set by the MARKER AMPL control. As in the first chapter 3.2.4. In addition button SWEEPlpressed. It is wobbulated at line frequency (sine). The output and the mark

41、er signal are not blanked during fly-back. Sweep and fly-back curves are identically covered by the PHASE control. The X-channel of the indicator is fed in via SWEEP OUT output. The scale-factor is set by LF AMPLITUDE; see 3.3.6.3. 3 . 2 . 5 . Wobbulator with travelling marker and coupled marker spe

42、ctrum According to 3.3.4. with additionally pulled turn-knob MARKER AMPL. (fig. 6) 3 . 2 . 6 . Frequency counter All push-buttons off except COUNTER EXT (fig. 7). 3.2.6.1. In this mode of operation the center frequency of the RF sweep generator can directly be measured in range .4/.5 and adjusted by

43、 means of button CENTER. For this connect the sockets RF OUT and COUNTER IN and push the button .4/.5. 3 . 2 . 7 . 1 kHz sine-wave generator All push-buttons off except MODULATION OFFION; the signal is fed to the MODISWEEP OUT socket (fig. 7). 3 . 2 . 8 . Triangle generator All push-buttons off exce

44、pt SWEEP OFFION and one of the buttons RF SWEEP RANGE. The frequency is set by LF FREQUENCY, the amplitude by LF AMPLITUDE. The signal is available at SWEEP OUT (fig. 7). APPLICATIONEXAMPLES General measuring principle Due to the fact that the output voltage is accurate and stable over a large range

45、, gain and sensiti- vity can be conveniently measured. It is possible to apply the method of continuous signal supply by keeping the output level constant, or the method of signal tracing. The choice depends mainly on the importance either of the non-reactive signal supply or of the signal decouplin

46、g with low detuning. The first method is subject to matching problems, the second to detuning phenomena. Fig. 3.3-1 Continuous signal supply Fig. 3.3-2 Signal tracing Test object A I 1 I r r I I I I I Usually the transmission characteristic of a selective test object is measured statically, i.e. poi

47、nt by point. PM 5326 - lndicator i 4 ? I I - L-J Fig. 3.3-3 Static measuring method Indicator P M 5 3 2 6 C ? Indicator _j L f PM 5326 RF D Test object Test o bj ec t I -,A The static method gives very reliable results, but takes much time. As mostly only the shape must be determined and not the abs

48、olute values of the transmission characteristic, the dynamic method (wobb- ling) is generally preferred. PM 5326 Oscilloscope Fig. 3.3-4 Dynamic measuring method 3.3.2. Mains connection, general Connect the RF-generator PM 5326 according to para. 2.5. of the Instruction Manual. The test object should be connected to mains via an isolating transformer. Only one test object may be connected to this transformer at the same time. When measuring all-mains receivers or TV sets, an isolating trans- former must be used. Correctly connect the chassis of the test object to earth. Avo