ifr2026q 电路图.pdf

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1、a d v a n c i n g w i r e l e s s t e s t The 2026Q is designed to work with a radio test set to provide a fully integrated radio receiver test solution for cellular and PCS systems Signal Sources 2026Q CDMA/GSM Interferer MultiSource Generator Two tone interference generation for AMPS/CDMA receiver

2、 testing in accordance with IS-97-A/IS-98-A Option for providing GSM signals for receiver and amplifier testing Combiner output frequency range from 800 MHz to 2.0 GHz Provides single calibrated point of reference for the transceiver under test Excellent phase noise and spectral purity Elimination o

3、f additional RF combining or signal conditioning High internal isolation of returned signals Includes two independent, fully featured RF signal generators 10 kHz to 2.4 GHz Very low levels of internally generated intermodulation products Single unit solution for CDMA interference testing The 2026Q i

4、s a derivative of the popular 2026 MultiSource RF signal generator. It has been designed to work directly with a CDMA radio test set to produce a fully integrated radio receiver test solution for CDMA cellular and PCS systems in accordance with IS-97-A/IS-98-A. Calibrated and Combined Signal Path It

5、 is designed to produce a fully calibrated combined RF output containing any mix of internally generated interference signals from its two RF sources, together with a calibrated signal path for a radio test set transmit output. A return path from the transceiver back to the radio test set receiver i

6、nput is also provided through the instrument as illustrated in figure 1. This allows a CDMA receiver to be tested for sensitivity in the presence of single or dual tone interference. The interfering signals are combined without the need for any RF switching mechanism that would otherwise affect the

7、test result. Option 116 allows the 2026Q to provide GSM modulated signals for receiver or amplifier testing with low floor noise characteristics. High Isolation 2026Q is configured to ensure high levels of isolation between each of the transmit and receive paths between the radio test set, the inter

8、fering signal sources and the transceiver under test. Figure 1 : 2026Q configured for radio testing with a test set Path loss test data is supplied with each instrument for the frequency bands 865 MHz - 895 MHz, 1750 MHz - 1990 MHz. Drift influences within these bands is minimal ensuring a level acc

9、uracy of better than 0.75 dB. The RadioFans.CN 收音机爱 好者资料库 frequency response across each of these bands is flat to within 0.1 dB, thus minimizing the need for additional system calibration. Independent Signal Generators Each of the RF generators contained within 2026Q may be used independently, rout

10、ed to their individual RF connectors. In this mode, each generator covers the full frequency range 10 kHz to 2.4 GHz with an output power of between -137 dBm and +24 dBm. Each source may be independently modulated either from an internal or external source(s). Modulation modes include AM, FM, PM, Pu

11、lse and 2/4 level FSK. The standard 2026 specification applies when used in this mode. Excellent Spectral Purity Very low phase noise and spurious responses are achieved making them ideal for CDMA handset interference tests and other general purpose applications. The 2026Q has a low residual FM of t

12、ypically 3 Hz and typical sideband noise of -121 dBc/Hz at 20 kHz offset from 1 GHz. The excellent noise floor performance is more than adequate for mobile handset and base station testing. Typical SSB Phase Noise at 1 GHz Typical Phase Noise at 20 kHz offset Flexible Source Routing Each of the sign

13、al sources can either be routed to a separate output connector or switched to the input of an RF combiner network before being fed to the combiner output connector. The combiner routing is set up quickly and effectively using the Combiner Set Up menu. Setting up the source and combiner routing The f

14、lexibility of the signal routing allows the 2026Q to accept an external input from another signal generator, such as the 2050 Digital and Vector Generator producing CDMA modulation or a radio test set. Automatic Source Coupling The two internal generators can have their frequency and level coupled.

15、In the case of RF level this coupling can be any fixed offset enabling control of a single parameter to manifest a change in both sources. For RF frequency this coupling can be both a fixed frequency offset or a harmonically related offset and again allow simple programming and control of the instru

16、ment. Setting up coupling Sweep The 2026Q allows either of the independent RF sources to be frequency swept with user defined start, stop, and step values to reduce the amount of operator time or GPIB overhead. By enabling the coupling facility, sweeping one source will simultaneously sweep the othe

17、r internal RF source to allow automated swept measurements on frequency conversion devices to be made. High RF Output Each of the RF signal generators is able to deliver up to +24 dBm at their output, making them ideal for testing components such as mixers and amplifiers etc. Comprehensive Modulatio

18、n Each signal source is capable of being independently modulated from its own fully programmable modulation source to ensure maximum flexibility. The internal modulation sources are each capable of generating sine, triangle or square wave signals. Amplitude, frequency and phase modulated carriers ca

19、n be generated from the internal modulation sources or from the a d v a n c i n g w i r e l e s s t e s t RadioFans.CN 收音机爱 好者资料库 independent external inputs. The frequency modulation system provides excellent performance in the DC coupled mode with very low carrier frequency error and stability ens

20、uring that the generator can accurately test receivers sensitive to small frequency errors. Programming A GPIB interface is fitted so that all standard signal generator functions are controllable over the bus. The protocol and syntax of GPIB commands has been designed in accordance with IEEE 488.2 s

21、tandard to facilitate the generation of ATE programs. A RS-232 interface is fitted as standard with a common command set to GPIB commands. RS-232 control is particularly suitable for use with simple external controllers or RF modems when the instrument is being used in a remote location. Low Cost of

22、 Ownership An electronic trip protects the individual source outputs against the accidental application of reverse power. Careful attention to the thermal design and the use of well-proven signal generator modules gives high reliability and calibration validity. The use of flash memory and software

23、download via the RS-232 interface means the 2026Q can be upgraded with its covers fitted. Option 116 - GSM Modulation Option 116 is avaialble to allow 2026A/B to emulate GSM signals using FM techniques which achieves superior noise floor performance than solutions using IQ systems. The facility is i

24、deal for testing GSM receiver selectivity and for testing the linearity of high performance multi-carrier power amplifiers. Specification General Description The 2026Q CDMA Interferer MultiSource Generator is a purpose built instrument for testing CDMA hand-set and base station equipment. It feature

25、s two synthesized RF signal generators with both independent and combined RF outputs. The combined RF output provides a path to and from the radio under test and an appropriate CDMA radio test set. Each signal source covers the frequency range 10 kHz to 2.4 GHz, whilst the combined path covers the r

26、ange 800 MHz to 2.0 GHz. Carrier Frequency Independent source frequency range 10 kHz to 2.4 GHz with a resolution of 1 Hz Combined output frequency range 800 MHz to 2.0 GHz with a resolution of 1 Hz Accuracy As frequency standard RF Output Range Individual outputs -137 dBm to +24 dBm(1) Combiner out

27、puts -37 dBm to -3 dBm(1) Maximum output is reduced by 5 dB when pulse modulation is selected and/or by up to 6 dB when AM is selected dependent upon AM depth. Resolution 0.1 dB or 3 digits for linear units Accuracy (Individual RF outputs) (over temp range 17 to 27C) RF Level-127 dBm to +6 dBm to Te

28、mp Stability +6 dBm+24 dBm(2) Up to 1.2 GHz0.8 dB1.0 dB0.02 dB/C Above 1.2 GHz1.6 dB2.0 dB40 dB 40 dB * -measured values are supplied with each instrument with a frequency response of 0.1 dB across the frequency bands 865 MHz to 895 MHz, 1750 MHz to 1780 MHz and 1930 MHz to 1990 MHz. Measurement unc

29、ertainty of 0.25 dB applies. Options are available providing lower path loss figures - please contact your IFR sales office for further details. a d v a n c i n g w i r e l e s s t e s t RadioFans.CN 收音机爱 好者资料库 VSWR (refer to Figure 1) 865 MHz to 895 MHz1750 MHz to 1990 MHz Port X1.2:11.35:1 Port Y1

30、.6:1*1.6:1* Port Z1.35:11.35:1 *Typically 1.25:1 Maximum Safe Power (matched) Port X+19 dBm Port Y+33 dBm Port Z+33 dBm RF Output connector 50 type N connector to MIL 390123D. Output protection Individual outputs Protected from a source of reverse power up to 50 W from 50 or 25 W from a source VSWR

31、of 5:1. Protection circuit can be reset from the front panel or via the GPIB interface. Combined output No reverse power protection. Spectral Purity Harmonics Individual outputs: Typically better than -30 dBc for RF level up to +6 dBm, typically better than -25 dBc for RF levels up to +18 dBm (+14 d

32、Bm above 1.2 GHz). Combined output: Typically better than -30 dBc for RF level up to -36 dBm, typically better than -25 dBc for RF levels up to -13 dBm. Non-Harmonics Better than -70 dBc to 1 GHz, better than -64 dBc above 1 GHz, better than -60 dBc above 2 GHz. Isolation Better than 80 dB between i

33、ndividual outputs in use. Better than 60 dB from a used individual output and the combiner output. Intermodulation -80 dBc at an RF output level of -22 dBm on the combiner, across the range 800 MHz to 2.0 GHz. Intermodulation levels reduce with reducing RF Level. Residual FM (FM off) Less then 4.5 H

34、z RMS deviation in a 300 Hz to 3.4 kHz un-weighted bandwidth at 1 GHz. Typically 1 Hz at 249 MHz, 3 Hz at 1001 MHz. Radio Connections Refer to Figure 1 SSB phase noise Better than -124 dBc/Hz at 20 kHz offset from a carrier frequency of 470 MHz, typically -121 dBc/Hz at 20 kHz offset from a carrier

35、frequency of 1 GHz. Carrier Leakage Less than 0.5 V PD at the carrier frequency in a two turn 25 mm diameter loop, 25 mm from the surface of the signal generator. Modulation Capability FM, AM or phase modulation can be applied to the carriers generated by each signal source from independent internal

36、 or external modulation sources. The internal modulation sources are capable of generating two simultaneous signals into any one of the modulation channels. Each internal and external modulation source can be simultaneously enabled to produce combined amplitude and frequency (or phase) modulation. P

37、ulse modulation can be applied to each of the carriers from external pulse sources. The pulse modulation can be used in combination with the other forms of modulation. 2 level or 4 level FSK modulation can be applied to each carrier using data from an external source. Frequency Modulation Deviation

38、0 to 100 kHz Resolution 3 digits or 1 Hz Accuracy at 1 kHz 5% Bandwidth (1 dB) DC to 100 kHz (DC coupled) 10 Hz to 100 kHz (AC coupled) 20 Hz to 100 kHz (AC coupled with ALC) Group delay Less then 5s to 100 kHz Carrier frequency offset (DC coupled) Less than 1% of the set frequency deviation Distort

39、ion Less than 1% at 1 kHz rate for deviations up to 100 kHz Typically 0.3% at 1 kHz rate for deviations up to 10 kHz Less than 3% at 1 kHz rate and deviations upto 100 kHz for carrier frequencies below 50 MHz Modulation source Internal modulation oscillator or external via front panel BNC FSK Modes

40、2 level or 4 level FSK Data source External data input via a 25 way rear panel D Type connector Frequency shift Variable up to 100 kHz Accuracy As FM deviation accuracy Timing jitter 3.2 s Filter 8th order Bessel, -3 dB at 3.9 kHz Phase Modulation Deviation 0 to 10 radians Resolution 3 digits or 0.0

41、1 radians Accuracy at 1 kHz 5% of indicated deviation excluding residual phase modulation 3 dB Bandwidth 100 Hz to 10 kHz Distortion Less than 3% at 10 radians at 1 kHz modulation rate. Typically 0.5% for deviations up to 1 radian at 1 kHz Modulation source Internal LF generator or external via fron

42、t panel BNC. Amplitude Modulation For carrier frequencies 500 MHz, useable to 1.5 GHz on the individual outputs Range 0 to 99.9% Resolution 0.1% Accuracy(3) 5% of set depth at 1 kHz rate 1 dB Bandwidth DC to 30 kHz (DC coupled) 10 Hz to 30 kHz (AC coupled) 20 Hz to 30 kHz (AC coupled with ALC) Disto

43、rtion(3) 1.5% at 1 kHz rate for modulation depths up to 30% 2.5% at 1 kHz rate for modulation depths up to 80% Modulation source Internal LF generator or external, via front panel BNC PM on AM Typically 0.1 radians at 30% depth at 470 MHz Pulse Modulation Frequency range 32 MHz to 2.4 GHz, useable t

44、o 10 MHz RF level range Maximum guaranteed output is reduced by 5 dB when pulse modulation is selected RF level accuracy When pulse modulation is enabled, adds 0.5 dB to the RF level accuracy specification Control Pulse input is on a front panel BNC with 10 knominal input impedance A logic 0 (0 V to

45、 1 V) turns the carrier off, a logic 1 (3.5 V to 5 V) turns the carrier on Maximum input is 15 V On/off ratio Better than 45 dB below 1.2 GHz, better than 40 dB above 1.2 GHz Rise and fall times Less than 10 s Overshoot 1 dB Modulation Oscillator The internal modulation oscillator for each signal so

46、urce is capable of generating one or two modulation tones simultaneously in one modulation channel. Frequency range 0.01 Hz to 20 kHz with a resolution of 0.01 Hz Frequency accuracy As frequency standard Distortion Less than 0.1% THD at 1 kHz Waveforms Sine wave to 20 kHz and a triangular or square

47、wave to 3 kHz Square wave jitter 6.4 s on any edge Audio Output The modulation oscillator signal from each source is available on the front panel Modulation Input/Output BNC connector at a nominal level of 2 V RMS EMF from a 600source impedance. External Modulation Input on the front panel Modulatio

48、n Input/Output connector. The modulation is calibrated with 1.414 V peak (1 V RMS sine wave) applied. Input impedance is 100 knominal. Maximum safe input a d v a n c i n g w i r e l e s s t e s t 15 V. MODULATION ALC The external modulation input can be levelled by a peak levelling ALC system over t

49、he input voltage range of 0.75 V to 1.25 V RMS sine wave. High and low indicators in the display indicate when the input is outside levelling range. Sweep Mode The carrier frequency of one source can be swept. To enable more than one source to be swept the coupling facility must be invoked. Control parameters Start/stop values of carrier frequency, frequency step size and time per step. Step time 50 ms to 10 s per step Trigger A trigger input is available on a rear panel BNC connector and can be used in single, continuous, start/stop or single step mode. Frequen