Related Manuals for Deepace KC901M
Summary of Contents for Deepace KC901M
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Page 1: Table Of Contents
Contents Introduction Installation guide 1.1 How to choose batteries 1.2 How to Install Batteries 1.3 How to mount shoulder Strap 1.4 How to carry and hold Quick guide 2.1 Power switch and keyboard 2.2 Measuring ports 2.3 Auxiliary ports 2.4 Function description 2.5 Adjust operating state 2.6 Local oscillation mode 2.7 Set the basic testing parameter... -
Page 2: Introduction
Recommended Applications The KC901M is mainly used for adjusting various RF circuits, such as filters, amplifiers, splitters, combiners; testing input/output impedance, evaluating antenna feeding system and detecting equipment’s signal amplitudes at all levels. It can also... - Page 3 (POWER, PWR) for 5 seconds to do the start-up check. Safety Information KC901M is NOT a device for general consumers, thus the user should have related professional knowledge in order to benefit from it. In this user manual, NOTICE indicates that it may cause inaccurate testing results or may incur some risk.
- Page 4 KeChuang Institute has given authority to Sichuan Kexinshe Ltd. Co. to take charge of the production of KC901M. At the same time, it’s responsible for the Domestic distribution of KC901M. KeChuang Institute has given authority to Guangdong Deepace Science and Technology Ltd. to take charge of the international distribution of KC901M.
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Page 5: Installation Guide
The KC901M can work with two or four batteries, ideally a set of four-batteries to allow longer operation. The rated charging current of KC901M is 1A. If there are only two batteries, for single battery, the peak charging current is 1.2A. Peak discharging current is 1.5A;... - Page 6 Chart 1-1 Step 2: pull the keyboard side of the shell and slide it 2cm out from the bottom (Chart 1-2). To do it, your fingers must hold the two sides of the shell hard and pull the RF adapter out at the same time. If it gets stuck, you can knock the bottom on the lower shell lightly.
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Page 7: How To Mount Shoulder Strap
Step 5: Check the data cable adapter. If there is any deviation and they are not correctly seated, please set them right again. Step 6: Put the shells back together again using the reverse of the steps above. Then press the POWER button to turn on the power and then perform a functional check. - Page 8 ENTER can be used as an alternative to pressing the knob. When operating the instrument using only the keyboard, hold the unit with both hands under display screen. KC901M can be fixed on to a working surface by using screws through its strap holes. - 7 -...
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Page 9: Quick Guide
User who has only a basic related knowledge can also be familiar with using the KC901M within two days. Therefore, this user manual is simplified and will not detail the settings of every function. -
Page 10: Measuring Ports
Chart 2-2 2.2 Measuring Ports There are three signal ports in KC901M. Two external RF ports (50 ohms), one AF port (1Kohm). The far right one is Port 1, the input/output port for testing spectrum and reflection. The far left one is Ports 2, generally the output port for transmission measurement and the output of RF signal source. -
Page 11: Auxiliary Ports
another RF port already connected to a standard load; the standard load is replaceable. In other files, as shown in chart 2-4, the ports from left to right are named Port 2, Port 3 and Port 1. The N type measuring port has a precise surface which needs to be protected, especially the S11 port from the right side. -
Page 12: Function Description
Chart 2-5 Ancillary ports on the right side 2.4 Function description Six basic functions of KC901M Reflection test (S11) Transmission test (S21) Spectrum (SPEC) Field strength (FIELD) RF signal source (RF SOURCE) Audio signal source (AF SOURCE) MODE button is for function selection. Function can be switched by pressing MODE repeatedly. - Page 13 Also it is necessary to take safety measures such as adding extra attenuation to protect the attenuator and the DC block which are concatenated with KC901M when measuring transmitters. Proficient users can use field strength mode to quickly judge if radio station’s emission is strong enough. For this mode, please use the port on the right side.
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Page 14: Adjust Operating State
In RF signal source mode, please use the N-port on the left side. The RF generator has the option of having its output selected as either Port2 or Port1. Access: Press MODE and then NEXT, finally choose RF SOURCE in the menu. Audio signal source (AF SOURCE) Audio Signal Source(AF SOURCE) is for producing a low-frequency voltage signal. -
Page 15: Set The Basic Testing Parameter
LowLo: Low local oscillation. The LO frequency is lower than the test frequency. The image interference is from the low frequency side. HighLo: High local oscillation. The LO frequency is higher than the test frequency. The image interference is from the high frequency side. If there is a signal showing in the same position on the screen whether in LowLo mode or HighLo mode, this signal is probably a truly existed signal. -
Page 16: Filed Strength Mode Setting
Warning KC901M is a network analyzer, so there is no protection for local oscillation’s leak. If used for observing the spectrum or field strength, there must be local oscillation signal flow into the receiving antenna and its strength degree can reach -10dBm. -
Page 17: Data Storage
The file will be automatically named by system. If you want rename file use the combined key SHIFT+3. While connecting the instrument to PC via USB, the instrument is detected as a USB flash drive. In this case, the SD card is already taken over by the PC, therefore when connecting to PC, data can’t be saved. -
Page 18: User Calibration And Preparations
Preparation before Measurement 3.1 Overview KC901M has been calibrated on its ports at factory already. Due to various reasons, there may have deviations where the displayed curves may appear drifting and not necessary reflect the exact situations in some cases. Yet in common engineering applications, the deviations would not tarnish judgments thus there is no need to conduct another calibration. -
Page 19: Calibration Before S21 Measurement
interpolation errors. Therefore, its accuracy is higher than the factory calibration and the system calibration. User calibration is only effective for the set frequency. If the setting parameters are changed, the calibration data will be useless though, it will be saved temporarily lest we go back to the last setting parameters;... -
Page 20: Calibration Before S11 Measurement
You can use either one or two cables to execute the calibration. As for using one cable, simply joint the two ends of the cable to the two ports respectively (Chart 3-1A). As for using two, firstly use a thru-connector with a known electric length to connect the two cables, and next joint the rest of the two ends respectively to the two ports (Chart3-1B). -
Page 21: Reflection Standard
KC951011/KC951012 is the SOL calibrator that we (Kexinshe) produced. Users can also use other proper calibrators, but keep in mind that the terminal effect of the chosen calibrators must be small enough since there is no compensation for KC901M (non-commercial version). KC951011’s nominal electric length is 5.26mm and KC951012’s one is 0. -
Page 22: Cable Compensation
3.6 Cable Compensation (Extension) In order to connect the instrument and DUT, usually we can calibrate on the end of the RF cables; but in some restricted occasions, users can either appeal to the system calibration or just calibrate it by manual, thanks to the compensation function that erases the influences by the cables on measurement. - Page 23 If user insists on doing so, please connect the ground of KC901M (the external layer of the coaxial connector) to the ground of the DUT in equipotential connection to prevent the damages due to the voltage difference between two.
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Page 24: Common Measurement Methods
Take band trap theory’s six-cavity duplexer as an example to introduce the adjusting steps. Set KC901M to S21 and then set its center and span so that the frequency range covers the original and the new frequencies of the duplexer. AMP can be set as 0dB or +10dB (AMP and ordinate range can be switched according to the curve’s position.). - Page 25 HIGH side, and mark2 (M2) indicates the insertion loss of HIGH side. Connect KC901M’s output port to duplexer’s ANT port, and then connect the input port to the RX port and the dummy load to the TX port. Adjust the three screws nearest to the RX port (the last three on the right in Chart4-1) until the dip point moves to M2 (Chart4-2).
- Page 26 lower than -70dB. The derived S-parameter of M2 is the duplexer’s insertion loss to the transmit signal. Chart 4-2: Typical curve of duplexer’s LOW side, uncompensated cable loss To get the insertion loss of the duplexer to the receiving signal, connect the output port to ANT port, the input port to RX port and the dummy load to TX port.
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Page 27: Antenna Measurement
Increase the output attenuation (SHIFT+Po. ATT) to 10dB. 4.2 Antenna Measurement WARNING The maximum output generated from the output port of KC901M is 10dBm(10mW). The output will be transmitted to the air via the antenna during testing. To diminish the transmission, users can increase the output attenuation (Po.ATT). - Page 28 (for example, 2400MHz). 4.2.4 Simple Measurement of Antenna’s Gain and Antenna Pattern KC901M can test antenna’s horizontal pattern or the front-to-back ratio with S21 (or insertion loss) function with another set of antenna; it can even test the antenna gain adding one more set of antenna whose gain is known.
- Page 29 size more than 20 times of the wave length; generally the flat roof is acceptable to test antennas whose frequency bands are over UHF. Equipment: Two antenna stands, one has a turntable on the top. Antenna stands’ heights should correspond with the functional design of the antenna, normally it should be larger than two operating wavelengths.
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Page 30: Measuring Electric Length Of Cable
Vice versa, if an operator needs a larger dynamic range to do other S21 tests, he/she can use a PC to control two pc of KC901M at the same time). -
Page 31: Spectrum
4.4 Spectrum We have enhanced the performance of KC901M’s input circuit. Therefore, it can provide simple spectrum analysis display. Warning: KC901M’s input port’s maximal limit level is +20dBm. Limiting direct voltage is 15V. -
Page 32: Detecting Interference Source
+13 dBm. KC901M is an VNA, its spectrum function is only for reference use. KC901M’s frequency spectrum mode can be interfered by the mirror image. So if it is used for monitoring, concatenating a narrow-band filter on the input port is suggested. - Page 33 Usually this filter is in helical structure or in cavity structure. Before using it, user can adjust its pass-band frequency under KC901M’s monitoring. When the testing signal is weak, user can also concatenate LNA (low noise amplifier) between the filter and the instrument.
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Page 34: Maintenance
Unless permitted, DO NOT monitor the space frequency spectrum of the non-working frequency with KC901M. Even if you accidentally do so, don’t reveal the data to anyone. Chapter Five Maintenance 5.1 How to Clean the Screen, Keyboard and Ports The glass pane of the display screen is replaceable. remove the protective film from the screen, otherwise it will reduce the visibility under the sun. - Page 35 4. The instrument is NOT waterproof or moisture-proof. Thus as it gets wet, turn off the power immediately and shake out the water from its bottom. Also disassemble the instrument immediately and take out the batteries. Anyway if using the instrument outdoors, better prepare a waterproof case.
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Page 36: Technical Notes
Check Chart 6-1 for KC901M’s schematic diagram. Chart 6-1: KC901M’s Schematic Diagram KC901M’s signal source generates a RF CW signal and output at port 1 when measuring S11 parameter. Use the Forward divider to get the forward signal and then use a Directional Coupler after the divider to get the reverse signal. -
Page 37: Charging Time And Time Of Endurance
DUT the signal input at port 1. The transition measurement is based on the forward signal and the transition signal. KC901M cannot measure the transition and reflection at the same time since the S21 measurement just supports a simple calibration. -
Page 38: Technical Parameters
Stop/Pause If there are only two batteries installed, the discharge rate becomes higher, so the endurance time will be half less than the time above. 6.3 Technical Parameter Object Test tate Parameter Note Type Freq. Range Effective 9KHz 9.8GHz SPEC can setting 9.8GHz Sweep Range SPAN... - Page 39 directional Coupler 50kHz—3GHz 45dB After relative calibration 3GHz—6GHz 35dB directional ， 90%range 6GHz—9.8GHz 30dB better Return Lose After through 1.5+0.1RL Uncertain calibration，3dB＜RL ＜25dB 时 Phase 9kHz—100kHz 8° ρ＞0.25 Uncertain 100kHz—1GHz 2° 1GHz—3.55GHz 5° 3.55GHz—9.8GHz 10° Port Port 2，1MHz-6GHz Dynamic VSWR Port 1，1MHz-6GHz Lo leakage Port 1...