10 kHz to 1 GHz AM/FM Signal Generators 2022A&C
Contents
1. 0 Second function protection i Ihsplay instrument status GPIB address AF output level units etc Display cnange GPIB address 3 Direct addressing af infernal bus sysiem S rvicing alc 4 Nisplay change GPIB SRO mask 5 Read identity string unprotected duplicate al SPV 6 Test LCD readoul and front pane LEDs 88 Nat used g Read clapsed tine iG Record external frequency Sandard choice 11 Read instrument identity siring 12 Wrde via GPIB a user dafined string stored in non evyaaile memory 13 Head user defined streng via GPIB 14 Dismayichange RF level unis Le voltage e m i or pad and dB reference 15 Displayichange AF level calibration offset 16 opecily start up with Instrument settungs from store 10 17 amp 18 Noi used Functions 1010 1Hinclusiv are proiecied funetons 190 Set identity string displayed by SF11 Calibration of FM tracking AF level voltage tuned Ihers and AM Other Second Functions reserved lor calibration and SOrvVICING Functions 190 t0 199 are doubly protected functions intended for use in manufacture and servicing only A single tiquid crystal display provides simultaneous readout of Carrier Frequency Modulation and RF Level Carrer Ireqguency 7 digi display with annunciators to Show frequency units external frequency standard GPIB service requests frequency limit exceeded female operation and instrument addressed Modulation display 3 digit2. legal characters received SRQs may be inhibited if desired by setting flags in the generator using a Second Function Second Functions The front panel Second Function key gives access to a number of different features available with 2022A and 2022C Some of these are related to maintenance calibration and programmabie operation via GPIB To prevent accidental interference with the contents of internal memories those Second Functions that enable the internal data to be altered are protected by a secure key sequence Two fevels of protection are offered appropriate to the Second Function being accessed The most secure is reserved for Second Functions that alter the instrument s 2022A and 2022C are symhesized signal generators covernng the frequency range TO kHz fo 1 GHz The owlput may be amplitude phase or lrequency modulated using either the built in al source or an external signal All control settings are entered from a iron panel keyboard A single liquid crystal display gives simultaneous readout af frequency modulation and oulpul level Remote control via the General Purpose Interlace Bus is available as an option GENERAL DESCRIPTION CARRIER FREQUENCY Range 10 KH lo 1 GHz Selection By keyboard entry Indication 7 digt LCD see under KEYBOARD AND DISPLAYS Displayed Resolution 10 Hz up to 100 MHz 100 Hz above 100 MHz calibration data change its identity string protect its store settings or blank the display
3. display with annunciators io show modulation units FM OM AM madiulalion off and external modulation selected AF level display 4 digit display with annunciaiors to Show RF level units RF outpul off and reverse power trip operated 197 to 194 195 ta 199 GPIB INTERFACE Capabilities RADIO FREQUENCY INTERFERENCE SAFETY RATED RANGE OF USE Over which full specification is met Temperature CONDITIONS OF STORAGE AND TRANSPORT Temperature Humidity Altitude POWER REQUIREMENTS AC Supply DIMENSIONS AND WEIGHT not including handle forward projection 1 A GPIB interlace is available as an accessory AI functions excepl ihe supply switch are remotely programmabie Complies with the following subsets as defined in IEEE 488 1978 and IEC Publication 625 1 SH1 AH1 T6 TEO 14 LEO SR1 AL PPO BC1 DTO CO Fi Conforms with the requirements of EEC directive 76 889 as ta imets af rf interference Complies with tEG 348 Oto 55C 40C to 70C Up to 90 relative humidity Up to 28500 m pressurised freight af 27 kPa differentia ne 3 Sibl in Switchable voltage ranges 105 to 120 V 21010 240 V all 2 10 4510 440 Hz 55 VA maximum Height Width Depth Weight 12mm 2b6mm 46 mm 75kg 6 in 126in 14 50K 16 5 ib s e AMIFM Signal Generators 2022A and 2022C are ideal for a variety of applications in receiver testing 2022A amp C VERSIONS AND ACCESSORIES When ordering plea
4. in the memory Phase modulation is available with a deviation range of up to 9 99 radians and amplitude modulation is provided with steps of 0 5 up to 99 5 depth External modulation is possible with a wide band input of 50 Hz to 100 kHz for f m 50 Hz to 10 kHz for o m and 20 Hz to 50kHz d c coupled for a m The characteristics of the f m input allow the digital signals commonly used in mobile radio to be handled A modulation levelling function is included which can be disabled when not required HI and LO indications show 2022A amp C when the input level is outside the range of the a l c system 2022C is fitted with a rear panel auxiliary modulation input socket which allows an external modulation signal e g a sub aucible signalling tone to be mixed with the internal signal Incrementing All parameters can be incremented or decremented in steps of any size which may be simply entered via the keyboard or GPIB If no step size is entered for a parameter the steps are pre set to 1kHz for carrier frequency 1kHz for fm deviation Tradian for o m deviation 1 for a m depth and 1 dB for output level A single tap on either the UP or DOWN key moves the parameter by one step If the key is held down the parameter steps once waits one second and then moves at three steps per second For search purposes it is possible to reverse this stepping direction without the one second delay Operation of the TOTAL SHIFT key dis
5. Advanced Test Equipment Rentals a Established 1981 www atecorp com 800 404 ATEC 2832 10 kHz to 1 GHz AM FM Signal _ EN Seas eee eee a heen een aera eee Generators esse apni kHz 1 Hz signal generator 2022A amp C gored caer RPE TS Oe Sha POTN a aaa 7c W POR CON INSTRUMENTS 10 CARRIER FREQUENCY i i Wide frequency cover 10 kHz to 1000 MHz L 43 dBm output 2022C L3 Small light and rugged for portability i Non volatile memory with 100 settings _ Powerful second functions for rapid fault finding and calibration L Comprehensive amplitude frequency and phase modulation L Simple operation C Reverse power protection up to 50 W 1 Choice of output calibration units L Optional GPIB programmability 2022A and 2022C Signal Generators are compact lightweight units offering frequency phase and amplitude modulation over the frequency range 10 kHz to 1 GHz Output levels up to 13dBm are offered on the 2022C and 6dBm on the 2022A The units are designed for a wide range of applications in research development production and maintenance Microprocessor control provides simple and rapid operation by direct keyboard entry of settings and the non volatile memory which can store up to one hundred settings further reduces measurement time Full GPIB programmability adds greater flexibility and faster throughput in systems applications Operation A simple key
6. ENCY STANDARD RF OUTPUT Level 127 to 13 dBm 02 pY te 2V emt for 20220 1270 dBm enV to 892 mV e mft lor 2022A When AM is selected the maximum outpul Power reduces linearly with AM depth to 7 dBm 2022C or 1 OdBm 2022A at Maximum AM depth Selection By keyboard entry Units may be pY mV Vemi or pd dB relative to 1 WV imyV emi or pd dBm Conversion between dB and voltage units May be achieved by pressing the appropiate unit key dBo or V mY uY Indication 4 digit LCD with units annunciators See KEYBOARD AND DISPLAYS Displayed resolution Output leve accuracy Output level flainess Output impedance Reverse power protectian SPURIOUS SIGNALS Harmonically related signals Sub harmonics at oulpul levels below 0 dBm Non harmonically related signals at oulpul levels below dBm Residual f m with f m OFF RF leakage FREQUENCY MODULATION Range Displayed resolution Selection Display Deviation accuracy Frequency response Distortion 0 1 dB or better over the entire voltage range 1B for output levels above 10 dBm 2 dB tor output levels below 10 dBm Better than 04dB 10 kHz to 1 GHz 5042 type N female socket to MIL 4901230 VSWR is betier than 15 1 for output levels below 10 dBm An electronic trip protects the generator output against reverse power of up to 50 W from a 50 ohm source or up to 25 W with a source VSWR up to 5 1 for frequenc
7. PLAYS 5 of deviation 4 20 Hz at 1 kHz modulating frequency excluding residual tm 1 dB irom 10 Hz to 25 kHz relative to 1 kHz using external modulation input With alec otf the low frequency response is extended to 10 Hz with a peak deviation value limited to the lower of 99 9 kHz or 0 047 Modulation Frequency in Hz Carrier Frequency in MHz 160 it Carrier Frequency is below 62 5 MHz KHz With a Le off can also be used for 10 Hz square wave switching with a peak deviation value limited to the jower of 99 9 kHz or 0 6 limes the value obtained by ihe formula above Less than 2 total harmonic distortion at 1 kHz madulation frequency and maximum deviation tor any carrier requency above 250 kHz External modulation PHASE MODULATION Range Displayed resolution Selection Deviation accuracy Frequency response Distortion External modulation AMPLITUDE MODULATION Range Resolution Selection Display Accuracy Frequency response Envelope distortion External modulation input 2022A amp C Less than 0 5 total harmonic distortion al 1 kHz modulating frequency for deviations up to 25 kHz for any Carrier above 250 kHz with MOD ALC off With modulation a c on the deviation is calibrated for input levels between 0 9 V and 3 7V ems A Hl or LO message is indicated in the modulation display if the applied level is outside the range of the adic With modulation a l c off the devia
8. al MOD ON OFF standard is selected MOG ALC High stability oven controlHled crystal STORE and RECALL oscillator 10 MHz Better than 02 ppm over the temperature range 01o 40 C SECOND FUNCT Secondary keyboard functions Within 0 8 p p m of final frequency 5 min from switch on at 20 C ambient Better than 0 1 ppm per month after i month s continuous use at constant ambient temperature Accepls a 10 MHz signal of at least 1 rms into a 1000 nominal impedance A 5 MHz or 1 MHz signal can be accepted by changing an internal link Connection is via a rear panel BNC socket A front panel BNC socket provides an outpul from the modulation oscillaior when internal modulation is selected and becomes the external modulation input when exiernal modulation is selected The input signal may be levelled by seleciing the MOO ALC ON OFF key Two LOD annunciaters HI and LO provide an aid to maintain calibrated modulation in the ALC ON made 1V 2 10 from a nominal 600 source The oulpul frequency is 1kH2 with accuracy same as the infernal frequency standard Total harmonic distortion is iess than 1 Input level nominally 1 Vo r m s inte 100 kf See FREQUENCY MODULATION PHASE MODULATION and AMPLITUDE MODULATION A blanked hole is provided so the RF cuiput socket can be litied to the rear panel For 20224 an additional blanked hole is provided for rear panel mounting a the modulation input output socket A rear p
9. anel BNC socket provides an auxilary modulation input with a nominal sensitivity of 26 of the indicated modulation for a 1V input Input impedance 600 ohms nominal All instrument settings are controlled hy the front pane keyboard The main key functions are CARRIER 789 MiiviV FREQ FM OM Displays 45 6 kHz mvV AM 12 3 H2iyy RF LEVEL 0 irad dB Settings are entered by selecting the required function keying in the value and pressing the appropriate units key Other functions provided are Increment key When pressed before a function key an increment value is entered for that function increments or decrements the selected function Displays total increment shitt from last keyed in value Returns setling to last previously keyed in yalue for the selected function tn remote operation requests return to local control 4 pressed alter Carrier Freg toggles between internal and externa frequency standard H pressed aller AM FM or OM loggles belween internal and external modulation Toggles between RF ouiput on and off Toggles between modulation on and ofl Toggles between modulation a l co on and off Provide storage and recall of instrument settings in non volatile memory Up to 20 complete instrument settings and up to 80 carrier frequencies may be stored Selects second function entry mode The following secondary functions may be selected using the Second Function key followed by a number key
10. board layout ensures easy operation All parameters are set using the numeric keys while up and down keys allow the values to be varied in steps of any size A TOTAL SHIFT key displays the deviation from the original setting and a RETURN key returns the selected parameter to the original value All front panel functions are available from GPIB when the optional GPIB interface board is fitted Frequency phase and amplitude modulation are selected by operation of the appropriate key and for rapid measurements of receiver signal to noise ratio the modulation can be switched on and off using the MOD ON OFF key Provision is made for operation with an external reference frequency of 1 MHz or 10 MHz as required Display Measurement settings are indicated on a jarge liquid crystal display offering clarity and low power consump tion The display features 7 digit resolution for carrier frequency 3digits for modulation and 4for r t level with units annunciators for unambiguous reading Status and diagnostic information are also shown Carrier frequency modulation and rf level are all shown together Output RF output levels up to 13 dBm can be set on the 2022C up to 6dbm on 2022A in all modulation modes by direct keyboard entry or via the GPIB with a resolution of at least 0 1dB over the entire range Total level accuracy is 1dB for output levels above 10dBm and 2dB below 10 dBm Levels are indicated on a four digit liqui
11. d crystal display with units annunciators and levels can be incremented in steps of any size A choice of seven calibration units is available to the operator and provision is made for the simple conversion of units e g dBm to pV Calibration data for the output level is held in the memory and may be altered from the front panel or over the interface bus The output level can be offset by up to 2dB from the calibrated value to compensate for cable or switching losses external to the generator The operator may also use this facility as a means of deliberately offsetting the output level to ensure that al generators in an area give identical measurements While using the offsetting facility the main calibration of the generator is not lost and may be returned to at any time Reverse power protection An electronic trip protects the generator output against reverse power of up to 50 W preventing damage to output circuits when RF or DC power is accidentally applied This feature contributes to long unit life and low cost of ownership Modulation Comprehensive a m f m and o m facilities are pro vided for testing al types of receivers A MOD ON OFF key is fitted to allow signal to noise ratio checks to be made The wide range frequency modulation facility provides ftm deviation up to a maximum of 99 9 kHz depending on modulation and carrier frequency and excellent f m accuracy is assured by the storage of calibration values
12. ies from d c to 1 GHz The trip may be reset from the front panel or via the GPIB For safety the protection is aiso pravided when the instrument is switched off Far output levels up io 4 7 dBm 0 d8m for 2022A better than 35 dBc for carrier frequencies up to 62 5 MHz typically 40 dBc Better than 25 dBc for carrier irequencies above 62 5 MHz typically 35 dBc None for carrier trequencies up to 500 MH7 better han 20 dBc for carrier frequencies above 500 MHZ At ottsets from the carrier of 3 kHz or greater For carrier frequencies above 62 5 MHz better than 70 dBc For carrier frequencies below 62 5 MHz better than 55 dBc in ihe band up to 150 MHz and betier than 40 dBc in the band ahove 150 MHz Less than 10 Hz equivalent peak deviation in a 300 H ta 3 kHz bandwidth at 499 MHz and improving by approximately 6 0B per octave with reducing carrier frequency down to 625 MHz Betier than 5 Hz below 62 5 MHz Less than 05 pY pd generated in a 50 2 load by a iwo turn 25 mm loop 25mm or more irom the case ot the generator with the output level set lo less than 10 dBm ang the output terminated in a 5093 sealed joad Peak deviation from 0 to 99 9 kHz for all carnier frequencies 10 H lor deviations up to 9 99 kHz 100 Hz tor deviations from 10 kHz ta 99 9 kHz By tront panel keyboard Internal 1 KHZ modulation or external input may be selected 3 digit LCD See KEYBOARD AND DIS
13. l mod input and a l c on OC coupled with a ic off Less than 3 total harmonic distortion at 1 kHz modulating frequency for depths of Oic 95 for carrier frequencies up to 62 5 MHZ to 80 for carrier frequencies up te 400 MHz With modulation a l c on the deviation ts calibrated for input levels between 0 9 V and t1 V r m s AHI or LO message ig indicated in the modulation display if the applied level is outside the range of the a i c With modulation a l c off the modulation depth is calibrated for an input level of 1V pd inputi impedance 100 kQ nominal d e coupled 2022A amp C MODULATION OSCILLATOR Frequency Frequency accuracy Distortion FREQUENCY STANDARD Frequency standard input INTERNAL FREQUENCY STANDARD Frequency Temperature stability Warm up lime Ageing rate EXTERNAL FREQUENCY STANDARD External standard input AUXILIARY INPUTS AND OUTPUTS Modulation input output Internal modulation oscillator output External modutation input Aliernative RF output and modulation sockets Auxiliary moauiaton input 2022C KEYBOARD AND DISPLAYS Main keyboard functions 1 and TOTAL amp RET N t KAZ As reference frequency standard Less than 1 total harmonic distortion INT EXT Internal or external frequency slandard may be selected from the front panel Annunciators show which is selected A rear panel BNG sockel provides an CARR ON OFF oxternal standard input when extern
14. ng accom plished using a secure Second Function in GPIB operation the non volatile memory may be used to store a user defined string Up to 32 ASCII characters may be written to or read from the unit for example to record the instrument s inventory informa tion date of last calibration normal instrument location etc Programming 2022A and 2022C can be simply fitted at any time with the optional GPIB interface so that alt functions can be controlled over the bus The instruments function as talker as well as listener In the listen mode the gener ator s functions are set by simple instructions and in 2022A amp C 558 phase noise Osel fom carrer hz Typica SSB phase noise of 2022A Signal Generator the talk mode strings of information containing details of the instrument s settings can be sent back over the bus allowing the controller to learn settings for later use Ease of programming is ensured by careful selection of mnemonics For example to send a carrier frequency of 123 456 MHz an f m deviation of 3 5 kHz and an output level of 1 74 uV and to place these settings in store 10of the memory it is only necessary to send over the bus the instruction CF123 456MZ FM3 5K2Z LV1 74UV ST10 The use of com mas as delimiters in the instruction string is not essential but often aids interpretation af program lines Service requests SRQs are sent for a variety of reasons including reverse power protection tripped and
15. plays the vari ations in all parameters from their original settings Use of the RETURN key sets the selected parameter back to its start value Non volatile memory The inclusion of a true non volatile semiconductor memory for storage of up to twenty compiete generator settings and a further eighty carrier frequencies ensures that settings are retained even when the generator is switched off without relying on a battery Any of the sets of data can be instantly recalled when required for later use and the UP DOWN keys may be used to step through a sequence of tests A further feature enables a single group of preset measurement values to be recalled automatically at switch on In addition to storage and recall of measurement settings non volatile memory contains other useful data Calibration data on r t ievel t m accuracy and r t calibration units are retained in these stores and may be altered using protected Second Functions Output level offset values are also retained in the instrument s memories and may be selected or deselected by Second Function operation Status information stored includes internal external standard GPIB address type and serial number Etap sed time indicators are also accessed via the internal memories One stores the number of operational hours since the instrument was manufactured and cannot be altered The other records the number of elapsed hours since the clock was last reset re settings bei
16. s when memories are recalled Less severe is the first Jevel of protection which enables the user to access those Second Functions that do not affect the fundamental calibration but which may be relevant to normal operation Exam ples include the selection of r f level calibration units r f level otfsets external standard frequency and switch on status In addition unprotected Second Functions provide a range of additional operating features such as the ability to display status information elapsed time and the type and serial number Maintenance and calibration The Second Function mode provides powerful fault diagnostic facilities from the front panel or via the GPIB by allowing the operator to send data directly to individual latches in the instrument The resulting changes in output conditions can be monitored and the area in which the fauit lies can be localized quickly RF level f m accuracy and frequency accuracy can be adjusted without removing the instrument s covers Level and f m accuracy can be adjusted over the GPIB leading to fully automated calibratian routines Careful mechanical design of the instrument ensures rapid access to all circuits for p c b or component replacement The main r t assemblies are easily remo ved for inspection and repair Printed boards intercon nect by means of plugs and sockets so simplifying first line maintenance Accuracy Equal to the lrequency standard accuracy See FREQU
17. se quote eight digit cade numbers Ordering numbers Versions 10 kHz to 1600 MHz Signal Generator 2022A 68 dBm output 10 kHz ta 1 GHz Signal Generator 2022C 13 dBm output 2022 910E 52022 930X Supplied Accessories AC Supply Lead 43129 003W Operating Manual H 2022 91D0E Vol 4 46881 796V Optional Accessories 4124 023J Front Panei Protective Cover 46881 7875 Service Manual for 2022A H52 022 310E Vol 2 46881 515 Service Manual for 2022C H 52022 930X Val 2 544 33 003N GPIB Module 43129 1990 GPIB Lead Assembly 46881 365R GPIB Manual H54813 010P contains detas of general GPIB protocols 46883 717K Rack Mounting Kit Single Unit 46883 7166 Rack Mounting Kit Double Unit 43126 0125 RF Connector Cable TM 4969 3 50 O 75m BNC 54311 092P Coaxial Adapter N mafe to BNC female 4371 095C RF Connector Cable 1m Type N connectors 4411 051X Impedance Adapter 50to 75 9 BNC Connectors JEEBJIEC Adapter Block for GPIB socket 4G6683 408K its
18. tion is calibrated for an input level of 1V pd Input impedance 100 kf nominal Peak deviation from Oto 9 99 radians 001 radians By front pane keyboard Internal 1 kHz modulation or external input may De selected 5 of deviation 0 02 radians at 1 KHz modulating frequency excluding residual yom 1dB from 10 Hz to 10 kHz relative to 1 kHz using external modulation input and a k e off 1B trom 50 Hz to 10 kHz relative te 1 kHz using external modulation input and aic on Less than 5 total harmonic distortion al 1kHz modulating frequency and maximum deviation for any carrier frequency above 250 kHz With modulation ale on ihe deviation is calibrated for input levels between 0 9 V and 1 1 Vrms A Hl or LO message is indicated in the modulation display if the applied level is outside the range of the a l c With modulation a l c off the deviation is calibrated for an input level of 1V p d input impedance 100 kf nominal Oto 995 05 Ry front panel keyboard Internal 1 kHz modulation or external input may be selected 3 digits See KEYBOARD ANB DISPLAYS For peak output power levels up to 0 dBm for 2022C and 6 dBm tor 2022A Better than 4 of depth setting 1 for 1 kHz modulating frequency and depths of Oto 95 for carrier frequencies up to 62 5 MHz Oto 80 for carrier frequencies up to 400 MHz 0 5 dB from 50 Hz to 15 kHz relative to 1 kHz at 80 depth using externa
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