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LP Technologies LPT-3000 User Manual Download Page 44

LPT-3000 Remote User

’

s Guide 

44 

LP Technologies Tech Support 
E-mail 

[email protected]

, or Call 

316-831-9696 Ext 0

 

 

[Figure 7-1] Delta Marker Function 

 

2. Utilization of RBW ; Distinction of a Small Signal 

 

To distinguish between two signals of similar frequencies, it is required to consider configuration 

characteristics and 3dB bandwidth of the analyzer IF (RBW) filter. The configuration characteristics of 

the filter are defined by selectivity, the ratio of the 3dB and the 60dB bandwidths. If a small signal is 

located too close to a large signal, the small signal may become blocked by IF (RBW) filter selection.   

 

- Example of Use (IF (RBW) Selection)   

Characteristics and measuring method of IF (RBW) can be obtained by measuring two input signals with 

a frequency difference of 200 kHz and an amplitude difference. 

 

⒜

    Connect the spectrum analyzer as shown in Figure 7-2 to obtain a signal with a frequency   

difference of 200kHz. Set the first signal generator as 100MHz and -30dBm.   

 

Summary of Contents for LPT-3000

Page 1: ...LPT 3000 Remote User s Guide 1 LP Technologies Tech Support E mail support lptech com or Call 316 831 9696 Ext 0 LPT 3000 Remote User s Guide...

Page 2: ...________________________________________________ 21 2 Program Execution __________________________________________________________________ 24 3 IP Connection Setup ____________________________________...

Page 3: ...Tech Support E mail support lptech com or Call 316 831 9696 Ext 0 4 Use of the Pre Amplifier ____________________________________________________________ 53 5 Measurement of Shoulder Attenuation _____...

Page 4: ...LPT 3000 Remote User s Guide 4 LP Technologies Tech Support E mail support lptech com or Call 316 831 9696 Ext 0 Chapter 1 Specifications...

Page 5: ...Readout Accuracy Indicated frequency Reference frequency accuracy Span Span accuracy 50 of RBW Phase Noise 90 dBc Hz 10 kHz offset Amplitude Range 20 dBm 105 dBm 20 dBm 135 dBm Pre Amp On Avg Noise Le...

Page 6: ...30 kHz 100 kHz 300 kHz 1 MHz 3 MHz 9 kHz 120 kHz Accuracy 20 Selectivity 60 dB 3 dB ratio 15 1 60 dB 6 dB ratio 12 1 9 kHz 120 kHz Switching Error 1 0 dB 1 kHz Reference RBW Video Bandwidth 10 Hz to...

Page 7: ...e RS 232C Null Modem Remote Control Ethernet 10 Base T Ethernet supports Internet remote control General Specifications Size 436 width 88 height 485 length mm Weight 10 kg Warming up Time 20 minutes f...

Page 8: ...LPT 3000 Remote User s Guide 8 LP Technologies Tech Support E mail support lptech com or Call 316 831 9696 Ext 0 Chapter 2 Preparation for Use...

Page 9: ...or any other issue that you may need assistance with To clean the surface of the unit please use a wet dry cloth Do not clean the inside of the case Accessories Note Operation Manual CD Included in th...

Page 10: ...lines including Ground When connected to a power outlet the cable grounds the cabinet of the unit 5 Environmental Conditions The LPT 3000R Spectrum Analyzer will operate normally between the temperatu...

Page 11: ...the On button Allow the unit to warm up for approximately 20 minutes before measuring To prevent short circuits due to condensation make sure the spectrum analyzer is fully dry before using it in nor...

Page 12: ...LPT 3000 Remote User s Guide 12 LP Technologies Tech Support E mail support lptech com or Call 316 831 9696 Ext 0 Chapter 3 Starting...

Page 13: ...te and screenshot memory using flash drive 3 Rack mount for convenient storage 4 Air passages on the front panel for proper ventilation After the LPT 3000R Spectrum Analyzer is turned on INITIALIZE is...

Page 14: ...1 IN 2 IN 3 and IN 4 as shown in the above figure 2 RF IN OUT Port For an RF signal entering the RF IN 1 port the RF IN OUT port uses the internal RF power divider and produces the output In general...

Page 15: ...00R Spectrum Analyzer through the RS 232C connector using SA_Comm_RS_R application software 5 The Ventilation fan is installed to discharge heat generated inside the equipment 6 The AC Power Switch is...

Page 16: ...firmware for the LPT 3000R System Info Displays the serial number of the unit and the version of the LPT 3000R installed Switch name change Allows you to rename the RF switches ports 3 Displays the ac...

Page 17: ...ndard signal is generated inside the equipment and is used as a test signal 1 Turn ON the AC switch button on the rear panel of the LPT 3000R Spectrum Analyzer After the power authorization and the in...

Page 18: ...d corner of the screen displays the Reference level The highest bar on the grid and is set at 0 0 dBm When the value of reference level is changed the Amplitude level of the highest grid line also cha...

Page 19: ...LPT 3000 Remote User s Guide 19 LP Technologies Tech Support E mail support lptech com or Call 316 831 9696 Ext 0 horizontally Figure 3 4 Relationship between Frequency and Amplitude...

Page 20: ...LPT 3000 Remote User s Guide 20 LP Technologies Tech Support E mail support lptech com or Call 316 831 9696 Ext 0 Chapter 4 Program installation and Startup...

Page 21: ...Chapter 4 Program Installation and Start up 1 Ethernet Graphic User Interface Remote TCP Program Installation The Remote TCP software can be installed directly from CD included or can be downloaded fr...

Page 22: ...emote User s Guide 22 LP Technologies Tech Support E mail support lptech com or Call 316 831 9696 Ext 0 Step 3 Continue with the installation process Step 4 Click Next to continue with the installatio...

Page 23: ...LPT 3000 Remote User s Guide 23 LP Technologies Tech Support E mail support lptech com or Call 316 831 9696 Ext 0 Step 5 Click Finish to complete the installation process...

Page 24: ...or Call 316 831 9696 Ext 0 2 Program execution To run the Remote TCP software click on Start Program Remote TCP_V18 and double click the icon 3 IP Connection Setup By default IP address 192 168 1 244...

Page 25: ...LPT 3000 Remote User s Guide 25 LP Technologies Tech Support E mail support lptech com or Call 316 831 9696 Ext 0 Chapter 5 Interface...

Page 26: ...aight through wiring and cross over wiring based on EIA TIA 568B wiring information Cross over cable is used when repetitively connecting hub or for point to point connection without a LAN hub Standar...

Page 27: ...Tech Support E mail support lptech com or Call 316 831 9696 Ext 0 TX 6 2 RX Not Used 4 4 Not Used 5 5 7 7 8 8 Table 5 3 Cross Over Cable Unshielded twisted pair UTP cable with RJ 45 connectors Figure...

Page 28: ...nits IP address default is 192 168 1 244 then click Connect 5 Enter or paste copy for the command listed below replacing the XXX by the correct parameters provided by your IT department Click SEND sys...

Page 29: ...s spectrum analyzer using Hyper Terminal please set up a new connection with the following parameters Bits per Seconds 115200 Data Bits 8 Parity None Stop bit 1 Flow control None 2 Communication Remot...

Page 30: ...y Shift 3 to initiate the communication When Spectrum analyzer Terminal Mode Start is displayed on the screen the spectrum analyzer will be ready to receive commands and queries Step 3 Enter the follo...

Page 31: ...com or Call 316 831 9696 Ext 0 Example syst comm tcp address 192 168 1 9 syst comm tcp gateway 192 168 1 1 syst comm tcp netmask 255 255 255 0 Query syst comm tcp address syst comm tcp gateway syst co...

Page 32: ...LPT 3000 Remote User s Guide 32 LP Technologies Tech Support E mail support lptech com or Call 316 831 9696 Ext 0 Chapter 6 Menu and Operations...

Page 33: ...rt lptech com or Call 316 831 9696 Ext 0 Chapter 6 Menu and Operations 1 File Menu Print Window Prints the screen displayed Save Window Image Saves e mail ready screen shots in jpg format Graph Color...

Page 34: ...es Tech Support E mail support lptech com or Call 316 831 9696 Ext 0 2 Function Menu Comm Setup This function allows the user to connect to different units System Info Displays the serial number insta...

Page 35: ...00kHz 100kHz 30kHz 10kHz 3kHz 1kHz 120kHz and 9kHz VBW This button is used to set VBW For VBW setup Auto Mode for automatic control according to VBW RBW and Manual Mode to randomly enter settings are...

Page 36: ...the Sweep manually or set it on Automatic mode 3 Port Switch Pre Amp Allow the user to instantly switch between the 4 RF inputs built in the LPT 3000R The Pre Amp allows the user to turn the Pre Ampli...

Page 37: ...of the screen displays Span Frequency Reference Level Setup Function This function is used to change the reference level The Ref button is highlighted when the function is activated and the top left h...

Page 38: ...r factory preset conditions Amplitude Unit dBm Display and Grid Display On Attenuation 30 dB Center Frequency 1 5GHz Start Frequency 0Hz Stop Frequency 3GHz CF Step 10 of span frequency Log Scale 10dB...

Page 39: ...utoset The Autoset function searches for the RF signal and automatically sets the parameter Channel Power This function measures Channel Power and Power Spectrum Density within a selected channel band...

Page 40: ...lows the user to select any points on the trace and display frequency and level data in real time The LPT 3000R has a total of 4 markers Marker 1 Marker 2 Marker 3 and Marker 4 can be displayed simult...

Page 41: ...ware with IP connection to the unit 4 Update the system firmware by a Clicking on Function menu drop down b Scrolling down and selecting Firmware Update c Entering the full file name firmware latest_v...

Page 42: ...LPT 3000 Remote User s Guide 42 LP Technologies Tech Support E mail support lptech com or Call 316 831 9696 Ext 0 Chapter 7 Measurement Applications...

Page 43: ...rker Comparison of Signals Using an LPT 3000R the frequency and amplitude differences between radio wireless telegraphy mobile communication devices and CATV spectrum signals can be easily compared Us...

Page 44: ...n characteristics of the filter are defined by selectivity the ratio of the 3dB and the 60dB bandwidths If a small signal is located too close to a large signal the small signal may become blocked by...

Page 45: ...90dBm lower than the first signal by 60dB When using a RBW 10kHz filter with selectivity of 15 1 or less the bandwidth of the filter becomes 150kHz or less at the point of 60dB Also the half value of...

Page 46: ...000 Remote User s Guide 46 LP Technologies Tech Support E mail support lptech com or Call 316 831 9696 Ext 0 Figure 7 3 Signal Resolution where RBW is 10kHz Figure 7 4 Signal Resolution where RBW is 3...

Page 47: ...internal noise level of the LPT 3000R RBW setup places the most significant impact on the internal noise level of the LPT 3000R and the input terminal attenuator influences the level of signals measur...

Page 48: ...imize the signal output Connect a signal generator to the RF INPUT of the LPT 3000R Set the Frequency of the signal generator to 100 MHz and Amplitude to 90 dBm Set the Center Frequency to 100 MHz Set...

Page 49: ...sured when lowering the noise level of the LPT 3000R by reducing RBW Set the frequency of the signal generator to 100MHz and the amplitude to 90dBm Set the Center Frequency to 100MHz Set the Span Freq...

Page 50: ...LPT 3000 Remote User s Guide 50 LP Technologies Tech Support E mail support lptech com or Call 316 831 9696 Ext 0 Figure 7 8 RBW 10kHz Signal Figure 7 9 RBW 3kHz Signal...

Page 51: ...regular random noise can be reduced and the signal can be clearly visible by making the video filter smaller Sweep time increases when video bandwidth decreases Measure level of a small signal by usin...

Page 52: ...LPT 3000 Remote User s Guide 52 LP Technologies Tech Support E mail support lptech com or Call 316 831 9696 Ext 0 Figure 7 11 VBW 3kHz Signal Figure 7 12 VBW 1kHz Signal...

Page 53: ...of a Pre Amplifier The small signal measuring capacity of the LPT 3000R can be improved by using the pre amplifier in addition to the method described in Section 7 4 Set the frequency of the signal g...

Page 54: ...uide 54 LP Technologies Tech Support E mail support lptech com or Call 316 831 9696 Ext 0 Figure 7 14 Pre Amplifier Turned Off Set the pre amplifier to ON Figure 7 15 Pre Amplifier Turned On Set the r...

Page 55: ...ort lptech com or Call 316 831 9696 Ext 0 The Noise level is lowered by approximately 30dB Figure 7 16 Pre Amplifier Turned On 5 Measurement of Shoulder Attenuation The LPT 3000R is equipped with a Sh...

Page 56: ...LPT 3000 Remote User s Guide 56 LP Technologies Tech Support E mail support lptech com or Call 316 831 9696 Ext 0 Figure 7 17 Shoulder Attenuation Measurement...

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