Pendulum GPS-12 User Manual Download Page 17 | Manualshive

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Chapter 3

Using the Controls

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Summary of Contents for GPS-12

Page 1: ...GPS 12 GPS 12R GPS 12R HS GPS 12RG GPS GLONASS GPS Frequency Standards User s Manual...

Page 2: ...II 4031 600 12001 Rev 05 May 2017 2017 Pendulum Instruments Altaria Services...

Page 3: ...aterial 2 8 3 Using the Controls Front Panel 3 2 Rear Panel 3 3 Functional Description 3 4 User Interface 3 4 4 GPS 12 Monitor What is GPS 12 Monitor 4 2 Requirements 4 2 Versions 4 2 Installation 4 2...

Page 4: ...PS 12R Figures illustrating the menu screens are generic Where necessary clarifying remarks or additional figures have been included GNSS stands for Global Navigational Satellite System and is an acro...

Page 5: ...Chapter 1 Preface...

Page 6: ...I O Boards The GPS 12X comes as standard with two 2 048 1 544 MHz square wave outputs and one 1 pps pulse output with approx 10 s duration The GPS 12RG has also 3 x 10 MHz and 1 x 5 MHz outputs See Op...

Page 7: ...sible to maintain stability during transportation as the internal reference oscillator is continuously powered Field use without access to AC line power is also practicable Option 78 HS has the additi...

Page 8: ...This page is intentionally left blank 1 4 Preface...

Page 9: ...Chapter 2 Preparation for Use...

Page 10: ...instrument it is essential that you follow gener ally accepted safety procedures in addition to the safety precautions specified in this manual The warranty commitments are rendered void if unauthori...

Page 11: ...nal DC power source Other options you ordered e g antenna option 01 antenna cable option 02 rack mount kit option 22 or carrying case option 27 27H are shipped in sepa rate boxes Certificate of Calibr...

Page 12: ...Before con necting any unit to the power line you must make sure that the protective ground functions correctly Only then can a unit be connected to the power line and only by using a three wire line...

Page 13: ...For bench top use a fold down support is available for use underneath the frequency standard This support can also be used as a handle to carry the instrument Rackmount Adapter If you have ordered a...

Page 14: ...or a pair of pliers to remove the springs holding each foot then push out the feet Push the instrument back into the cover See Figure 2 4 Mount the two rear feet with the screws B to the rear panel P...

Page 15: ...ion details and instructions on connecting other antennas cables than those supplied by Pendulum please consult the Appendix in this manual Connecting to a PC A PC can be connected to the USB port at...

Page 16: ...78 HS contain a re chargeable NiMH battery pack that serves the purpose of providing uninterruptible power to the instrument As all batteries it has a finite lifetime Although NiMH based cells are by...

Page 17: ...Chapter 3 Using the Controls...

Page 18: ...bove the key in standby mode The CURSOR keys with arrow symbols are used for moving the cursor marked by text inversion around the menus on the display By pressing the ENTER key you either confirm a c...

Page 19: ...puts Option 70B sine wave 3 x 10 MHz 1 x 5 MHz Option 71B sine wave 1 x 10 MHz 1 x 5 MHz 1 x 1 MHz 1 x 0 1 MHz Option 72B square wave 2 x 2 048 MHz 2 x 2 048 Mbps Option 73B square wave 4 x 13 MHz Opt...

Page 20: ...ult mode Hold over mode is automatically entered when the disciplining fails for some reason e g loss of satellite contact Hold over mode can also be forced via the User Interface UI When the satellit...

Page 21: ...een Press t n 1 pps Offset GPS12R HS GPS 12RG Here you can set the time offset of the 1 pps output signal that is available on the front panel The range is 999 ns GNSS Menu Moving the cursor to GNSS i...

Page 22: ...uations are available via a D sub connector on the rear panel The normally closed NC contacts will open when the respective alarm criteria are met Figure 3 2 shows the pin configuration Power Source M...

Page 23: ...Espa ol Turkish T rk e Russian CJFF846 There is also a module available containing Chinese and Japanese English can always be chosen irrespective of the active language module n Display Contrast The...

Page 24: ...This page is intentionally left blank 3 8 User Interface Using the Controls...

Page 25: ...Chapter 4 GPS 12 Monitor...

Page 26: ...If you want to be able to control the GPS 12X remotely you have to buy a license key that opens up all the features of the monitor pro gram You don t have to download and install another version of th...

Page 27: ...orms e g GPS GNSS options require that you press the Edit button on the toolbar to enter Edit mode Press Edit again to return and OK to confirm the new values Taking Snapshots of the Device Screen If...

Page 28: ...This page is intentionally left blank 4 4 Main Features GPS 12 Monitor...

Page 29: ...Chapter 5 Performance Check...

Page 30: ...ure described in Chapter 5 Preventive Mainte nance Preparations Connect the antenna including cable to the an tenna input rear Make sure the antenna posi tion is satisfactory Power On Test Connect the...

Page 31: ...at the low level is 1 2 V 10 and the high level 1 2 V 10 Connect the counter and verify that the frequency is 2 048 1 544 MHz 0 002 Hz 1 pps 10 MHz The default value is 1 pps but can be changed to 10...

Page 32: ...period time mul tiplied by four i e 4 x 488 1952 2 ns Standard Deviation s 1 ns Option 73B 4 x 13 MHz Connect a DSO with 50 W inputs to all BNC connectors one at a time Verify that the signal is a squ...

Page 33: ...it was completely discharged from the be ginning Disconnect the power cord and switch on the instrument Check that the instrument behaves nor mally and is operative for about 90 min utes n Option 78...

Page 34: ...andby Mode Measure the resistance between pin 8 and pin 9 on the D SUB alarm connector Expected result open circuit near infin ity Measure the resistance between pin 1 and pin 6 on the D SUB alarm con...

Page 35: ...Chapter 6 Preventive Maintenance...

Page 36: ...ce capable of generating both 2 048 MHz and alternatively 1 5 or 10 MHz at an amplitude between 0 1 and 5 Vrms in 50 W It should also have a traceable cali bration history The Pendulum GPS 89 with Opt...

Page 37: ...ulate the absolute difference between the two results DTIE Calculate Df DTIE 86400 Acceptance criterion Df calculated according to the expression above should be less than 5 x 10 12 Fan Replacement If...

Page 38: ...This page is intentionally left blank 6 4 Battery Replacement Preventive Maintenance...

Page 39: ...Chapter 7 Specifications...

Page 40: ...0 12 1 10 12 t 100 s 2 10 11 5 10 12 3 10 12 t 10 s 2 10 11 1 10 11 1 10 11 t 1 s 2 10 11 2 10 11 2 10 11 Phase noise dBc Hz offset 1 Hz 90 75 85 10 Hz 120 95 125 100 Hz 130 125 135 1 kHz 140 140 145...

Page 41: ...g which the oscillator has been operat ing continuously Note 4 After 72 h of continuous operation Note 5 Locked to GNSS Note 6 Position Hold 7 3 Stability Specifications OCXO Standard Rb HS Rb 2 Aging...

Page 42: ...Max switching current 9 p male D Sub 1 loop for urgent alarm 1 loop for non urgent alarm relay open alarm mode relay closed normal mode 60 VDC 200 mA Options Option 70B Outputs Connector type Frequen...

Page 43: ...l DC Supply Connector type NiMH 16 8 V 2 3 Ah Bat loaded to 100 2 h1 or 3 h2 2 5 h3 or 5 h4 When 5 10 min left 3 h to 80 of capacity 11 3 18 V 5 2 1 A Inlet protected against overvoltage and wrong po...

Page 44: ...key is OFF GNSS Receiver Trimble IRZ Resolution T GPS 12 R MNP M3 GPS 12RG Antenna connector Power out Channels Trimble IRZ Carrier code Type N female 5 V 0 1 A on center conductor for feeding active...

Page 45: ...Altitude Vibration Shock Safety EMI 0 C 50 C operating 40 C 70 C storage 95 RH 0 C 30 C operating storage 4600 m operating 12000 m storage 3G 55 Hz per MIL T 28800D Class 3 Style D Half sine 40G per...

Page 46: ...13 MHz outputs 2 x 1 544 MHz 2 x 1 544 Mbps outputs 48 V external DC supply Internal battery backup Internal battery backup w ex ternal DC connector for charg ing and continuous operation 1 x 1 pps d...

Page 47: ...oft carrying case Heavy duty hard transport case GPS 12 Monitor Control Monitoring SW GPS only antenna GLONASS GPS antenna Antenna mounting kit Antenna cable 20 m Antenna cable 50 m Antenna cable 130...

Page 48: ...This page is intentionally left blank 7 10 Ordering Information Specifications...

Page 49: ...Chapter 8 Appendix...

Page 50: ...other General Guidelines to Good Antenna Location The general rule that applies to all installations working in or near the microwave frequency bands is that it should be possible to see the transmit...

Page 51: ...t the same frequency the problem has still been observed from time to time and must not be neglected Standard Configuration The majority of installations can do with the standard configuration consist...

Page 52: ...m but not 245 m Use a line amplifier with a nominal gain of 20 dB plus low loss coaxial cable of type LMR 400 or equivalent The ampli fier must accept a fixed 5 V supply volt age fed through the centr...

Page 53: ...ll be 55 m instead This is the upper limit for the standard RG 213 ca ble under normal climatic conditions Calculation of total gain at the receiver input using a RG 213 cable with an attenuation of 0...

Page 54: ...compulsory Example 4 Requirements Cable length Lightning arrester Climatic conditions 325 m 120 m in doors yes snow and ice Solution This is a typical two amplifier configuration A worst case calcula...

Page 55: ...mplifiers may be more suitable for example when very long cable lengths are nec essary Maximum two amplifiers can be inserted in the signal path before the loss seen from the an tenna exceeds 6 dB The...

Page 56: ...uently it is recommended to keep these components as replacement parts if minimum downtime is important n Mounting Masts Used for securing the antenna unit At the same time the coaxial connectors are...

Page 57: ...Chapter 9 Index...

Page 58: ...2 Protection against Lightning Strikes 8 4 Standard Configuration 8 3 Appendix 8 1 Attenuators 8 7 Auxiliary Components 8 7 B Basic Controls 3 2 Battery Replacement 6 3 C Calibration 6 2 Cesium Standa...

Page 59: ...ting Masts 8 8 Multi path Reception 8 3 N National Standards 1 3 O Option 01 Antenna 7 6 Option 02 Antenna Cable 7 6 Option 70B 3x10 MHz 1x5 MHz spec 7 4 Check 5 3 Option 71B 10 5 1 0 1 MHz spec 7 4 C...

Page 60: ...dapter 2 5 Rear Panel 3 3 Rear Panel Outputs 5 3 Recommended Test Equipment 5 2 Reference Outputs Disciplining Input 7 6 S Safety Instructions 2 2 Specifications 7 1 Stability spec 1 pps Output 7 3 Fr...

Page 61: ...Chapter 10 Service...

Page 62: ...rt and service please contact Pendulum at the following addresses II Altaria Services Sp z o o ul Lotnicza 37 80 297 Banino Poland Office Address As above Shipping Address As above Phone Fax 48 58 681...

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