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SRS Labs SR446, Manual

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SRS Labs SR446 Manual Download Page 1

(Draft 07/20/2022) 

 

 

MODEL SR446 

 

 

DC to 400 MHz PROGRAMMABLE GAIN PREAMPLIFIER 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1290-D Reamwood Avenue 

Sunnyvale, California 94089 

Phone: (408) 744-9040 • Fax: (408) 744-9049 

email: [email protected] • www.thinkSRS.com 

Copyright © 2022 by SRS, Inc. 

All Rights Reserved. 

Summary of Contents for SR446

Page 1: ...SR446 DC to 400 MHz PROGRAMMABLE GAIN PREAMPLIFIER 1290 D Reamwood Avenue Sunnyvale California 94089 Phone 408 744 9040 Fax 408 744 9049 email info thinkSRS com www thinkSRS com Copyright 2022 by SRS...

Page 2: ...warranty service or repair this product must be returned to a Stanford Research Systems authorized service facility Contact Stanford Research Systems or an authorized representative before returning...

Page 3: ...Page 3 of 15...

Page 4: ...Page 4 of 15 SR446 Front Panel SR446 Rear Panel...

Page 5: ...ndby indicator shows that live AC main is connected and ready to power up the unit Operation The input impedance can be switched between 50 or 500 The 500 setting provides high transimpedance gain for...

Page 6: ...fall time 1 ns Propagation delay 4 5 ns Gain drift Gain 1 Gain 100 0 07 0 1 C C Outputs driving 50 load Source impedance 49 50 51 Offset 1 1 mV Offset drift Gain 1 Gain 100 0 4 0 8 mV C mV C Linear op...

Page 7: ...de Input impedance 50 Full bandwidth input signal 130mVpk pk sinusoidal wave 8 6 4 2 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 0 01 0 10 1 00 10 00 100 00 1 000 00 Gain dB Freque...

Page 8: ...s Commands are listed in the remote interface section below For accurate calibration power on the SR446 and wait for least 20 minutes to ensure it is warm up AC gain calibration compare output signal...

Page 9: ...meters Reset the instrument o Press Save Recall button o Press Recall Default on the screen o Press Confirm REFERENCE Amplitude 200 mV Frequency 1 0 MHz Phase 0 DC LEVEL 0 V Mode Common Source Interna...

Page 10: ...Page 10 of 15 SR446 settings Input impedance 50 Input couple DC Gain 1 V V or 0 dB Bandwidth Full Trim pot locations R412 is on the left R512 is on the right...

Page 11: ...Auto button LED next to the OFFSET should be energized o Verify that R value is less than 0 1 mV 4 Measure and adjust Out gain o Connect the SR865A SINE OUT to the input of SR446 o Connect the SR446 O...

Page 12: ...Page 12 of 15 Power Supplies The unit operates from a universal input power supply The power supply can operate from AC mains with 85 264 VAC and 47 63 Hz Typical power consumption is 5 W...

Page 13: ...Remote command list Only the host can initiate a command The SR446 can only send response to a query and it does not echo back the command sent The system will clear some error flags after respond to...

Page 14: ...V V or Gain 2 n dB GAIN n Query voltage gain n gain index from 0 to 20 See above BNDW n None Select bandwidth index n 0 Full 1 200 MHz 2 100 MHz 3 20 MHz BNDW n Query bandwidth n 0 Full 1 200 MHz 2 10...

Page 15: ...or BIT4 Analog board communication error BIT5 EEPROM error BIT6 Factory calibration in the EEPROM is invalid BIT7 Last calibration data in the EEPROM is invalid BIT8 Not able to set parameter BIT9 Not...

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