Related Manuals for Schwarzbeck FCKL 1528
Summary of Contents for Schwarzbeck FCKL 1528
- Page 1 SCHWARZBECK MESS - ELEKTRONIK DESCRIPTION, DATA SHEET 9 kHz - 30 MHz Interference Measuring Receiver FCKL 1528...
- Page 2 Data Interface documentation. The unique r. f. analogue circuits of the FCKL 1528 give IEC-Bus-Interface: Connector 24 sockets precise measurement with or without PC- Sub D-Connector 25 sockets control.
- Page 3 Modes of operation substantially, because VARISCAN adjusts The FCKL 1528 covers the following modes: scan speed to the signals ahead. w Manual operation with manual So spectrum can be scanned directly in frequency tuning reading CISPR-Quasipeak avoid switching measurement from the meter.
- Page 4 IBM-compatible PC with 80386 and math. Coprocessor 80387 or better, 4 MByte RAM, VGA-Graphics, min. 10 MByte free space on hard disk, 3.5" floppy disk drive, INES IEEE 488 16- bit interface card. PCMCIA-card also available for portable Computers. Description, Data Sheet FCKL 1528 Page -4...
- Page 5 Intermittent 20% on, (low noise). Burst<0,5 sec. 143 dBµV (5 W) Spurious, Large Signal Handling Capability Image frequency atten. >65 dB / typ. 90 dB I.F.-isolation >70 dB / typ. 90 dB Spurious None Description, Data Sheet FCKL 1528 Page -5...
- Page 6 150 mV, Ri > 10 kΩ Standard accessories Pulse weighted output Mains cable, Operation manual see Y-axis xy-recorder I.F.-output optional Supply voltages for auxiliaries +12 V / 100 mA -12 V / 50 mA Description, Data Sheet FCKL 1528 Page -6...
- Page 7 R.F.-Probe,1,5 kΩ TK 9416 more information. R.F.-Probe 2,5 kΩ TK 9417 Equipment may be subject to modification without any notice. Specifications without tolerance should be High voltage probe TK 9420 considered as order of magnitude. Description, Data Sheet FCKL 1528 Page -7...
- Page 8 SCHWARZBECK MESS - ELEKTRONIK Manual Operating Instructions INTERFERENCE MEASURING RECEIVER 9 kHz - 30 MHz FCKL 1528 Interference measuring receiver for front panel operation with or without xy-recorder and for PC-controlled operation via IEEE-bus with the SCHWARZBECK Messbase software.
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Page 9: Table Of Contents
FCKL 1528 Manual, Operation Instructions Table of contents Sections Title Page Introduction, Description Safety-Information, Warning, Mains Voltage Selector/Fuse Controls (Front panel) Displays and controls, description Reading of interference voltage Attenuator area 4.2.1 Attenuator display 4.2.2 10 dB - steps 4.2.3... -
Page 10: Introduction, Description
10-watt-power attenuator with 10 dB attenuation can be switched into the signal path directly behind the r. f.-connector. If used with a remote control Schwarzbeck L.I.S.N. (NSLK 812x rcfm, rcps) the system is protected by a complete safety net in the receiver, the L.I.S.N. and the software, even if the components are connected to different mains and are switched on and off at different times. -
Page 11: Safety-Information, Warning, Mains Voltage Selector/Fuse
Remove the holder box with the yellow mains voltage field by pushing the lever. Insert the correct fuses. Insert the holder box in the correct orientation for the mains voltage. Manual FCKL 1528 Page 2... -
Page 12: Controls (Front Panel)
The front panel is divided into 8 areas, which unite important controls and displays. They are as follows: Meter (4) Meter Reading (7) Detector Attenuator (5) Receiving frequency (8) R. f.-Input Calibration (6) A. f.-Audio (9) Mains ON Manual FCKL 1528 Page 3... -
Page 13: Attenuator Area
Edge positions preset left or right margin in the off position. This is the case if the red "eye" is invisible. (9kHz, 30MHz) for the xy - recorder. Manual FCKL 1528 Page 4... -
Page 14: Displays And Controls, Description
0 dB horizontal centre line of the xy recorder diagram. The left end of this line touches a small rectangular area, in which this dB number has to be written. At the right end of the line the relative level has to be introduced. Manual FCKL 1528 Page 5... -
Page 15: Db - Steps
During calibration the meter reading approaches 0 dB centre without reaching it. For special purposes continuous pressing of the calibration key can be useful. The most important case is the adjustment of the xy recorder. Manual FCKL 1528 Page 6... -
Page 16: Measurement / Lin/Log Y / Low Noise / Low Distortion
The above difficulties to match the receiver to an unknown spectrum in order to get a diagram is completely avoided in a PC controlled system. The FCKL 1518 together with the Schwarzbeck software "is doing it all by itself". 4.5 Frequency-area 4.5.1 Frequency display... -
Page 17: Frequency Rotary Encoder
(think of lock position if nothing happens!) To detect narrow band signals steps have to be chosen "Fine". This is especially true if xy-recorder is used. For an overview or frequency hopping "Coarse" is faster. Manual FCKL 1528 Page 8... -
Page 18: Af / Audio Area
The Peak Detector has an extremely short charge time constant and is self-resetting. The measurement is the peak value, related to the bandwidth, based on the calibration of the effective value of a sine wave. Manual FCKL 1528 Page 9... -
Page 19: Average Detector Av
This detector has a weighing function which considers the effects of disturbance to digitally modulated signals. Basically it uses a RMS - Detector with a specified corner frequency followed by critcally damped second order low pass filter with a time constant of 160 msec. Manual FCKL 1528 Page 10... -
Page 20: First Steps
00.150 MHz / band B. In the right corner of the frequency display (5.3) the upper or lower segment shows band A or B. After this change between band A/B a recalibration is good practice (3). Manual FCKL 1528 Page 11... -
Page 21: Appendix Pages
D) Set rotary switch 5.4 to the Start position . In the edge positions 9 kHz or 29.999 MHz will be presettet to adjust xy-recorder. E) The automatic scanning begins. You can stop scanning and go on manually anytime with (5.4) without any restrictions. Manual FCKL 1528 Page 12... -
Page 22: Automatic Scanning, Recording With Xy - Recorder
VARISCAN is always active if automatic frequency scan is chosen. A cable connects the xy-recorder to the rear side 25-pin sub-d- connector of the FCKL 1528. The xy-recorder receives the analogue voltages for frequency and interference voltage. -
Page 23: Rear Side (Description, Comments, Warnings)
E 1 1 1 0 no Phase with ground choke F 1 1 1 1 no Phase with ground choke Remote: Logic 0 local (manually)/logic 1 remote (PC control) 0 V / 5 V Manual FCKL 1528 Page 14... -
Page 24: How To Connect And Adjust The Xy-Recorder
(+20 dB I. F. Sw. 4). Press Calibrator Key (3) on receiver continuously with switch (5.4) on 9 kHz, until meter reading is 0 dB center. Adjust pen to point B with VAR. Y control (G). Manual FCKL 1528 page - 15... -
Page 25: Measuring Site For Interference Voltage
-LISN set Receiver input Selector (8.2) to PC 386 or 387 with "Geschützter Eingang"="Prot. Input", but never to " IEEE - card and "Direkter Eingang"="Direct Input" There is no need for a dB-correction. Schwarzbeck-Software Manual FCKL 1528 page - 16... -
Page 26: Tracking Generator
Additional attenuation can be 10 dB fixed attenuators on the output of the tracking generator and on the input of the receiver. Also antenna factors and other transducer factors and attenuation have to be considered. Manual FCKL 1528 page - 17... - Page 27 The power amplifier of the tracking generator uses r. f.-transistors which may be destroyed by high voltage spikes. If it is to be connected to a L.I.S.N. a pulse limiter must be used (please ask for information), otherwise the generator might be damaged. Manual FCKL 1528 page - 18...
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Page 28: Meter (Indication Instrument) And Meter Reading
This attenuation is not added on the input, but near the output of the receiver and therefor reduces noise. This makes measurement easier because of reduced noise errors, but it increases receiver loading which can result in errors caused by overload (saturation, compression, intermodulation). Manual FCKL 1528 page - 19... - Page 29 Band A is much lower than in Band B. D) The 3 different detectors differently convert receiver noise into noise reading. The Peak/Mil-detector shows the highest reading, followed by CISPR Quasi-Peak and Average. Manual FCKL 1528 page - 20...
- Page 30 On this point the receiver have optimum precision, which is derived from the internal pulse standard by substitution. To the left precision is reduced because of receiver internal noise. To the right precision is reduced because of potential overload (pulse compression especially with slow pulses/clicks). Manual FCKL 1528 page - 21...
- Page 31 For the difference of 1 dB from -10 dB to -9 dB only an input voltage difference of 0,122 µV is needed. For the difference between +5 dB and +6 dB we need 0,686 µV, nearly 6 times more. This corresponds to the distances in the dB-scaling. Manual FCKL 1528 page - 22...
- Page 32 Standard equipment such as PCs and microprocessors don’t show these characteristics. It is good practice to check measurement with the receiver on the safe side, which means low distortion on linear scale. Manual FCKL 1528 page - 23...
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Page 33: Basic Function
FMZB. these Schwarzbeck receivers are still in 13.2.1 Receiver unit use and estimated very high by the The receiver unit of the FCKL 1528 users. begins at the input connector and ends at Recent electronic development however... - Page 34 Function, circuit description Manual FCKL 1528 page - 25...
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Page 35: Prefabricated Diagrams For The Xy - Recorder
(- 5 dB rel.) (-10 dB rel.) (-15 dB rel.) (-20 dB rel.) (-25 dB rel.) 20 k 50 k 100 k 200 k 500 k 10 M 20 M 30 M Manual FCKL 1528 page - 26... - Page 36 (- 5 dB rel.) dB µ V /m (-10 dB rel.) (-15 dB rel.) (-20 dB rel.) (-25 dB rel.) 20 k 50 k 100 k 200 k 500 k 10 M 20 M 30 M Manual FCKL 1528 page - 27...
- Page 37 (- 5 dB rel.) dB µ A /m (-10 dB rel.) (-15 dB rel.) (-20 dB rel.) (-25 dB rel.) 20 k 50 k 100 k 200 k 500 k 10 M 20 M 30 M Manual FCKL 1528 page - 28...
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