GPS-101 GPS satellite simulator GPS101 stock sale - Li Haifeng Description: Global Positioning System (GPS) work fast checksum verification loaded GPS satellite receiver operating integrity optional loader (SV) and navigation (NAV ) data RF level adjustable within the range of -85dBm to -145dBm to 1dB interval adjustment Doppler shift control allows the operator to select one of approximately ± 4kHz carrier frequency shift with the real-time clock to store GPS ephemeris directly or through an antenna coupler to connect a portable battery-operated receiver IFR GPS-101 Global Positioning System Simulator for Global Positioning System (GPS) to provide accurate and continuous testing. GPS-101 simulate a global positioning satellites and produce a particular satellite carrier (SV) and navigation data model to complete this test. Together with remote loading GPS almanac information and RF level / frequency control, GPS-101 GPS system provides a verification portable test solutions. GPS-101 can check the following types of devices: a complete GPS receiver - band antenna system (such as a handheld component), built-in test mode, by receiving a particular satellite loader (SV) number and display navigation data word to produce , or can receive and display information. Machine with an external antenna systems onboard GPS receiver. GPS receiver or any device with a display and the ability to have a single satellite navigation data to detect. Operating GPS-101 dedicated keys on the front panel to select all of the major functions. Selected parameters are displayed in a wide viewing angle, high contrast, there backlight LCD display. Mode key RFLVL: RF level by adjusting the knob, the range -85dBm to -145dBm, stride to 1dB, have to check GPS. DPLR: Doppler control allows the operator to select one of approximately ± 4kHz carrier frequency shift to validate the performance of the receiver to detect and lock. SV: Select the analog No. 1-37 satellites. If the satellite is not normal or invalid number in the selected satellite almanac data show the number of edge asterisk. RF CONT: RF control signal generator for 1575.42MHz Select modulation source. Select RF OFF, carrier-off; select RF CW, the C / A code and the NAV data (spread spectrum signal); RF EXT, BPSK modulation via external AUXI / O connection; RF SQR, for 511.5kHz square wave modulation (Maintenance ). SET UP: set the RS-232/422 communication port parameters, set the test characteristics and self-test. TEST: Select a three stored NAV data model. (Also retain three data model for future use) T1: NAV data including programmable GPS almanac information and the number of weeks and time. Almanac data within 30 days cycle effectively, by RS-232 port to "YUMA" ASCII text format download code. Current almanac data obtained from US Coast Guard Station Internet. GPS-101 has an internal real-time clock to save the UTC time programmed by the user. T2: NAV GPS data model contains a fixed number of weeks and time. T3: Fixed 11001100 ... repeat the test signal. Select key: Move the cursor to select fields / parameters. Display button: Contrast setting keys and screen backlight on / off key. ESC key: back to the main operating screen. Knob: You can quickly select the data. Product parameters: frequency 1575.42MHz precision signal generator with the main time-based Doppler frequency shift selectable frequency offset offset accuracy ± 4.0kHz see a single SV master oscillator analog channels, choose No. 1-37-phase modulation BPSK PRN code C / A code = 1.023MHz 1023bit Goethe yards NAV data 50Hz, programmable test model, built-in test pattern output level -85dBm ~ -145dBm / 1dB pace, accuracy ± 2dB, (AC-coupled) standard 50-ohm cable, 4dB loss . Interference <-40dBc, the external modulation input bandwidth of 20MHz external oscillator frequency is 10MHz TTL master degree temperature stability ± 1ppm coupler 1575.42MHz -20dB typ year calibration interval selection of used battery operating time of 360 minutes the advantage of measuring instruments are: 1, compared with the newly purchased instrument months delivery period, buying second-hand equipment delivery period much shorter. Time is in the market today is undoubtedly the most obvious advantage. 2, the price of second-hand equipment cheap, basic equipment for the new purchase price of 20% to 50%. In today's rapid development of electronic technology, equipment updates are faster, smaller investment in the least risk. 3, in order to allow you to safely use second-hand equipment we offer, we sell second-hand equipment can be done: a warranty ranging from six months to one year. 2, according to your request, to the national measurement test instrument calibration unit. Note: The company's main second-hand equipment, the company will supply a vast majority will continue to be directly imported from abroad, Condition new, low price, high cost, and do our best to be the best in service! Please call us or visit to purchase, and welcome book.