郭小文 13530101607 深圳汉润电子有限公司
MSG-2051 is a high performance signal generator designed for generating the simulation signal of GPS (Global Positioning System) satellite.
特点
■ Frequency stability of internal reference oscillator is less then 2×10-8
■ Rapid changing out level range is from -80dBm to -149.9dBm.
■ Doppler frequency (1.57542GHz&plu***n;10kHz) can be digital-set and can be adjustable in 0.1Hz.
■ A reference clock (10MHz) input/output terminals and a 1pps signal input/ (Output on option) terminals are equipped for external synchronizing.
■ The output terminal is DC-cut to able to connect to the powered antenna cable.
■ All N***I data preset by GP-IB line and also RS-232C.
■ An automatic Z-count increment function is equipped so as to synchronized with real time clock.
■ The front panel operation can be programmed by GP-IB and RS-232C.
* The application program is attached.
■ Digital standard signal generator adopting the DDS method
Owing to the adoption of the DDS method, this MSG-2280 signal generates precise RF frequencies over a wide range of 100kHz to 170MHz in addition to AF frequencies by its built-in AF oscillator.
■ 10ms settling time
Adopting the DDS method ensures a high settling speed of frequencies and the resp***e time is shorter than 10ms.
■ 100kHz to 170MHz wide band
Its frequency range extends over a wide range from 100kHz to 170MHz covering the AM band, FM band, and weather band.
■ Electronic attenuator
Its highly reliable electronic attenuator ensures a long-time continuous use, and the output level (-20dBµV to 126dBµV) can be switched quickly and precisely.
■ An FM stereo modulator is built-in
This unit comprises MONO, MAIN, L, R, SUB, and OFF modulation modes and its L/R separation exceeds 60dB.
■ Multi-functi***
This unit can execute AM/FM simultaneous modulation for testing the suppression degree of multi-pass signals.
Its output AGC and limiting sensitivity can be read directly by its ΔdB function.
It can also read the detuning frequency, etc. easily and directly by its ΔF e-emphasis can be set to OFF, 25µs, 50µs, and 75µs.
■ Memory function and interface
Data of 100 points can be stored and recall out by its memory function.This unit is also provided with GP-IB, RS-232C, and EXTI/O external control interfaces as its standard equipment so that it can be converted into an automatic measuring system.
规格
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Frequency Section
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Range
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100kHz to 170MHz
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LED display/Resolution
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7digits/100Hz (Δf function)
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Settling time
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Less than 10ms
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Accuracy
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&plu***n;5×10-6
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Output Section
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OutputRange
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-20dBµV to 126dBµV (EFM)
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LED display/Resolution
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4-digits/0.1dB
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Accuracy
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&plu***n;1.5dB
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Leveling
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&plu***n;1.5dB
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Output impedance
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50Ω, VSWR < 1.3
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Unit
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dBµV [EFM]
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Spurious signals
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• 2/3 rd Harmonic sprious
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< -30dB
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• Non-Harmonic sprious
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< -40dB
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Attenuataor
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Electronic attenuator(Semiconductor)
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RF leakage
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Will not effect output level performance when 0dBµV is set 0dBµ
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Modulation Section
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< FM Data >
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Deviation range
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0 to 135kHz
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deviation
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Fo≦35MHz,Up to 25% of carrier frequency
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LED display/Resolution
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3-digit / 0.1kHz
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Modulation accuracy
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10.7MHz&plu***n;1MHz (76MHz to 108MHz)
&plu***n;(setting×0.1 + 0.5)kHz 0.3MHz to 170MHz &plu***n;(setting×0.1 + 1) kHz |
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Internal modulation
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• Frequency
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10Hz to 100kHz
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• Accuracy
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&plu***n;0.1%
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Ext.modulation
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• Freq. range
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20Hz to 100kHz
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• Impedance
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10kΩ unbal
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• Input voltage
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1Vp-p &plu***n;2%
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• Distortion
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≦0.05% in 10.7MHz&plu***n;1MHz
76MHz to 108MHz ≦0.1% in 0.3MHz to 170MHz (With AF 1kHz at 75kHz dev. in BW 50 to 20kHz with 50µs de-emphasis applied) |
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• Residual FM
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< -80dB
(In ,80 to 20kHz with de-emphasis 50µS applied) |
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• Incidental AM
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≦0.5%
(10.7MHz&plu***n;1MHz,76MHz to 108MHz with AF 1kHz and FM 75kHz deviation) |
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<AMData>
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Distortion range
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20 to 15kHz
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Modulation range
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0% to 100% (lower than 120dBµV)
0% to 30% (Higher than 120dBµV) |
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LED Display/Resolution
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3-digits/0.1%
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Accuracy
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&plu***n;(setting×0.1+1)% (0.4MHz to 1.7MHz≦80%)
&plu***n;(setting×0.1+2)% (0.15MHz to 170MHz≦80%) |
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Internal modulation
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• Frequency
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10 to 20kHz
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• Accuracy
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&plu***n;0.1%
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Ext.modulation
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• Freq. range
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20Hz to 20kHz (1kHz reference)
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• Freq. resp***e
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&plu***n;1dB
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• Impedance
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10kΩ (unbal)
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• Input Voltage
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1Vp-p &plu***n;2%
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• Distortion
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Residual AM
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0.5% (in ,80Hz to 15kHz)
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Incidental FM
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≦75Hz (0.4MHz to 1.7MHz)
≦150Hz (0.15MHz to 170MHz) |
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FM Stereo Modulation
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Separation
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≧55dB
(With AF 400Hz to 1kHz at 100% modulation in 76MHz to 108MHz) ≧40dB (With 50Hz to 15kHz) |
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Frequency resp***e
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≦&plu***n;1dB (20Hz to 15kHz with AF 1kHz reference)
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Composite signal
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• Output
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5Vp-p&plu***n;10% (FM-MONO, 100% MOD)
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• Setting range
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0 to 135% (75kHz/100%)
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• Setting accuracy
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&plu***n;1%
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• Impedance
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600Ω
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Distortion
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≦0.05% (100% MOD.)
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S/N
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≧76dB
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38kHz
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• Leakage
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≦-50dB
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Pilot signal
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• Frequency
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19kHz&plu***n;1Hz
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• Output
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1Vrms&plu***n;10% (Fixed)
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• Impedance
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1kΩ
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• Setting range
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0 to 15% in 0.1step
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Modulation Mode
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L=R / L / R / L= -R / MONO / OFF
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Intenal modulation
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• Frequency range
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20 to 15kHz
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• Frequency resp***e
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&plu***n;1dB
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Pre-emphasis
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Setting range
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25µs / 50µs / 75µs / OFF
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Interface Function
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Parallel interface
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GP-IB complying with an IEEE std.488-1975
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Serial intreface
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RS-232C
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ntrol interface (I/O)
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TTL level
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General Data
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Operating Temperature range
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0ºC to +40ºC
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Performance guarantee
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+10ºC to +35ºC
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Power requirements
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AC100 to 240V&plu***n;10%, 50/60Hz, 42VA
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Dimensi***
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420 (W) × 115 (H) × 370 (D) mm
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Weight
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Approx. 7.5kg
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