SDI CS-1, Operating Manual

Page 1: ...I SPECTRADYNAMICS INC 9 192 GHZ CESIUM FREQUENCY SYNTHESIZER CS 1 OPERATING MANUAL SPECTRADYNAMICS INC 1849 Cherry St Unit 2 Louisville CO 80027 Phone 303 665 1852 Fax 303 604 6088 www spectradynamics com ...

Page 2: ...c Operation 10 Menu Diagram 13 Main Screen 15 Number Entry Screen 16 Frequency Screen 17 Phase Screen 18 Amplitude Screen 19 Settings Screen 20 Modulation Screen 21 Frequency Sweep Screen 22 Frequency Shift Keying Screen 24 Phase Modulation Screen 25 Amplitude Modulation Screen 26 State Machine Trigger Screen 27 Instrument Screen 29 Communication Screen 30 Time Screen 31 PLL Screen 32 Warranty 34 ...

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Page 4: ...ncy in the low frequency section of the synthesizer This 100 MHz signal is distributed using a 1 input four output isolation amplifier One of these 100 MHz signal is used as the reference for a 9 2 GHz DRO The output of the 9 2 GHz DRO is buffered and used to drive the LO port of a single sideband mixer The second 100 MHz signal is used to clock a DDS synthesizer module The DDS synthesizer generat...

Page 5: ...losure of the unit is directly connected to the outlet ground to protect against electrical shock Always use an outlet with a protective ground and do not disable this safety mechanism Service Do not attempt to service or adjust the instrument unless another person capable of providing first aid or resuscitation is present Operation To operate the CS 1 unit locate the AC power entry connector on t...

Page 6: ... applied to the unit and the unit is operating properly REAR PANEL AC POWER ENTRY MODULE The CS 1 DC Module is configured to operate on 100 120 VAC 220 240 VAC DC OUTPUTS Connectors for the DC power to be supplied to the Synthesizer Module ENCLOSURE Size 3U X 19 X 16 Weight 22 lbs DC Module SDI ...

Page 7: ...s not required DISPLAY The LCD display and touch screen is used to control the CS 1 in local control mode REFERENCE INPUTS Signal The Signal LED will turn on when the external reference is present at the Ext Ref port PLL The PLL LED will turn on when the CS 1 internal PLLs are operating properly Ext Ref SMA input for the 5 MHz external reference signal 0 1 Hz level 7 to 15 dBm This input port has ...

Page 8: ...roviding a buffered copy of the internal DDS Direct Digital Synthesizer output phase locked to the 100 MHz reference signal This output signal has a level of 12 dBm 1 dB 9 2 GHz SMA output providing a buffered copy of the internal DRO Dielectric Resonator Oscillator output phase locked to the reference signal This output signal has a level of 2 dBm 1 dB 9 192 GHz SMA buffered output providing the ...

Page 9: ...ics Inc 2010 7 DC INPUT Connectors for the DC power provided to the Synthesizer Module by the DC Module STANDBY Standby Switch turns off the synthesizer but keeps all oscillators powered on SDI Synthesizer Module Rear Panel ...

Page 10: ... Noise L f Carrier 100 MHz Offset frequency 10 Hz 100 Hz 1 kHz 10 kHz 120 133 155 175 dBc Hz Phase Noise L f Carrier 10 MHz Offset frequency 1 Hz 10 Hz 100Hz 1 kHz 114 142 160 168 dBc Hz Phase Noise L f Carrier 5 MHz Offset frequency 1 Hz 10 Hz 100Hz 1 kHz 118 150 167 173 dBc Hz Temperature coefficient 9 192 GHz 0 5 ps K Note The PM Noise at 1 Hz for Carrier 9 192 GHz Pair measurement locked 0 5Hz...

Page 11: ...ter or more sophisticated control can be used with software such as Labview On the front panel above the RS 232 connector the LED labeled DATA will light up when data is being received or sent on the RS 232 port and can be used to verify that the unit is communicating Port Settings On power up the RS 232 port settings are Baud rate 9600 8 Bits 1 Stop Bit No Parity Hardware handshaking is not used ...

Page 12: ...guration that is using its internal 5 MHz crystal oscillator as the reference signal To set the CS 1 to work in External Reference configuration use the following sequence SET INST PLL EXT then apply to the Ext Ref port a 5 MHz signal with power level between 10 and 15 dBm Both PLLs will be properly locked as indicated by the illuminated PLL LED Press the soft key EXIT three times to return to the...

Page 13: ...GHz output signal is controllable using the LCD touch screen on the front panel or through the RS 232 Communication Port The frequency can range from 9 189631770 GHz to 9 195631770 GHz 3 MHz with respect to the preset value with a resolution of 10 6 Hz Menu FREQ Amplitude control The signal amplitude at the 9 192 GHz port is controllable through the RS 232 Communication Port or using the LCD touch...

Page 14: ...ammed through the RS 232 or entered using the front panel LCD touch screen Menu MOD The Trigger Menu offers the possibility of synchronizing the modulation events with an external trigger provided at the Trigger In Port setting the CS 1 to operate as a state machine The operation as a state machine includes up to 10 states each one incremented on every rising edge of the hardware trigger When the ...

Page 15: ...Copyright SpectraDynamics Inc 2010 13 Menu Diagram SDI ...

Page 16: ...Copyright SpectraDynamics Inc 2010 14 Menu Diagram SDI ...

Page 17: ...360 is equal to 0 Amplitude Amplitude of the 9 1926xx GHz output carrier expressed in dBm MENU RF ON OFF Turns ON the 9 1926xx GHz output port by use of an internal relay controlled by the internal processor FREQ Allows changing of the carrier frequency The FREQ soft key will bring up the Frequency Menu PHASE Allows changing the phase of the RF carrier signal The PHASE soft key will bring up the P...

Page 18: ... number entry box SPECIAL KEYS Hz Enter number in Hertz kHz Enter number in kiloHertz MHz Enter number in MegaHertz deg Enter number in degrees dBm Enter number in dBm Vrms Enter number in Volts RMS Vpp Enter number in Volts peak to peak BK Backspace ENTER Enter new number and exit number menu ESC Exit number menu discarding changes 0 9 Numbers zero through nine Decimal point Negative sign SDI Num...

Page 19: ...The preset value is 9 192631770 GHz The new frequency can be specified in Hz kHz or MHz and can range from 9 189631770 GHz to 9 195631770 GHz 3 MHz with respect to the preset value The frequency resolution is 10 6 Hz STEP Allows entering the frequency step size in Hz kHz or MHz using the Frequency Entry Menu The maximum frequency step size is 6 MHz and the frequency step resolution is 10 6 Hz UP I...

Page 20: ... the phase to be added to the 9 1926xx GHz signal using the Phase Entry Menu The new phase is specified in degrees deg and must be with the interval 360 deg to 360 deg The phase resolution is 0 022 deg STEP Allows entering the phase step size in degrees using the Phase Entry Menu The maximum step size is 360 deg The phase step resolution is 0 022 deg UP Increases the carrier phase by the phase ste...

Page 21: ...SET Allows entering the new amplitude of the 9 1926xx GHz carrier using the Amplitude Entry Menu The amplitude can be expressed in dBm Vrms or Vpp always referring to 50 Ohm characteristic impedance The amplitude can range from 10 dBm to 15dBm STEP Allows entering a step size in dBm using the Number Menu NUM The smallest step size is 0 1 dB UP Increases the carrier amplitude by the step size DOWN ...

Page 22: ...ulation options FM Setup Frequency Modulation PM Setup Phase Modulation AM Setup Amplitude Modulation STM State Machine Trigger setup and information The STM key will bring up the State Machine Trigger Screen INST Instrument setup and information The INST key will bring up the Instrument Screen EXIT Exit to previous screen Settings Screen SDI ...

Page 23: ...f the 9 1926xx GHz output signal a Frequency Sweep and Frequency Shift Keying FSK modulation This soft key gives access to the two FM menus FSWP allows access to the Frequency Sweep Menu FSK allows access to the Frequency Shift Keying Menu EXIT returns to the Modulation Menu PM allows Phase Shift Keying PSK modulation of the 9 1926xx GHz output signal AM allows Amplitude Shift Keying ASK modulatio...

Page 24: ...reen DISPLAYS F1 Sweep start frequency in Hz F2 Sweep stop frequency in Hz DF Step size in Hz RATE The frequency step rate in Hz Use with External Modulation Input The first rising edge of a TTL level signal on the external modulation input starts a sweep with increasing frequency and subsequent pulses will change direction of the frequency sweep To turn off the frequency sweep toggle the ON OFF s...

Page 25: ...ncy in Hz The stop frequency must be greater than the start frequency and within the range specified above DF Step size in Hz The step size must be smaller than the difference in frequency between the start and stop frequency The smallest step size is 10 6 Hz RATE The frequency step rate in Hz The frequency step rate must be between 48 Hz and 25 MHz EXIT Returns to the previous menu ON OFF Toggles...

Page 26: ...m 9 189631770 GHz to 9 195631770 GHz 3 MHz with respect to the preset value The frequency resolution is 10 6 Hz F2 Allows entering the second frequency value using the Frequency Entry Menu F2 needs to be larger than F1 and within the range specified above ON OFF Toggles FSK modulation of or off UP DOWN Toggle between frequency 1 and frequency 2 EXIT Exit to previous menu Use with External Modulati...

Page 27: ...u The phase is specified in degrees deg and must be within the interval 360 deg to 360 deg The resolution is 0 022 deg PHAS2 Allows entering the second phase value using the Phase Entry Menu according to the specifications above ON OFF Toggle phase modulation on or off UP DOWN Toggle between phase 1 and phase 2 EXIT Exit to previous menu Use with External Modulation Input Phase shift between phase...

Page 28: ...o on MENU RTIM Allows entering the time used by the RF signal to go from on to off and vice versa ramp time The ramp time can range from 164 10 6 square wave to 10485 10 6 ON OFF Toggle modulation on or off UP DOWN Toggle between amplitude off to amplitude on EXIT Exit to previous menu Uses External Modulation Input The amplitude change from off state to on state of the synthesizer occurs on each ...

Page 29: ... RF relay on or off Note it is not recommended to switch the RF relay with every trigger event because will significantly limit the RF relay lifetime which is specified by a finite number of switching cycles MTBF is typically 5 million cycles DISPLAYS State n m Indicates which state is being edited n and the total number of states that have been programmed m RF ON OFF Current position of the RF re...

Page 30: ...F carrier signal for this state using the Phase Entry Menu The phase is specified in degrees deg and must be with the interval 360 deg to 360 deg The resolution is 0 022 deg AMPL Allows entering the amplitude of the RF carrier for this state using the Amplitude Entry Menu The amplitude can be expressed in dBm Vrms or Vpp always referring to 50 Ohm characteristic impedance The amplitude can range f...

Page 31: ...rial communications options and RS 232 remote control configuration DISP Change the brightness of the LCD display UP Increase the value DOWN Decrease the value EXIT Exit to previous screen TIME Set the instrument date and time PLL Allows access to the PLL Menu to change the reference configuration of CS 1 EXIT Exit to previous menu Instrument Screen SDI ...

Page 32: ...refer to the RS 232 port section on page 9 of this manual DISPLAYS Current baud rate setting MENU REM LOCL Allows entering remote control mode CS 1 is now waiting for commands through the RS 232 serial port The RS 232 port is set as a dumb terminal A null modem adapter is not needed and should not be used Hardware handshaking is not used For additional pin out information please refer to the RS 23...

Page 33: ...rent time in the form hh mm ss Date current date in the form mm dd yy MENU TIME Allows entering new time using the Time Entry Menu in the form hh mm ss DATE Allows entering new time using the Date Entry Menu in the form mm dd yy UP Increments the current time by one second DOWN Decrements the current time by one second EXIT Return to previous menu Time Screen SDI ...

Page 34: ...AYS 5 MHz power level of the internal 5 MHz signal It should be about 12 dBm Ref power level of the 5 MHz external reference signal It should be between 7 and 15 dBm 100 MHz power level of the 100 MHz signal It should be at least 11 dBm LVn indicates the locking voltage for the three PLLs of the CS 1 n 1 is the 5 MHz PLL while n 2 is the 100 MHz PLL They are locked when the displayed value is betw...

Page 35: ...ables the Internal Reference configuration The Ext Ref port is now routed to the tuning port of the internal 5 MHz oscillator and is set to receive a DC coupled tuning signal The DC voltage should be less than 5VDC CLR Allows the clearing of the status register turning off the status LED if the error condition that caused it has been resolved EXIT Exit to previous menu PLL Screen SDI ...

Page 36: ...the fitness for any particular purpose SDI s obligation under this warranty shall not include any transportation charges or costs of installation or any liability for direct indirect or consequential damages or delay Any improper use operation beyond capacity substitution of parts not approved by SDI or any alteration or repair by others in such manner as in SDI s reasonable judgment affects the p...

Page 37: ...CS 1 R02 ...