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Preamplifier Model: PRM828 Serial Number: 2484
<br />*I Frequency Response Test Report
<br />Frequency response electrically tested at 120.0 dBpV using a 18 pF capacitor to simulate microphone
<br />capacitance.
<br />20.0 200.0 2000.0 20000.0
<br />Frequency (Hz)
<br />Frequency
<br />Relative
<br />el
<br />Uncertain �
<br />Limits
<br />Frequency
<br />Y
<br />Relative
<br />evel
<br />Uncertain �
<br />Limits
<br />NO
<br />`�
<br />(dB)
<br />(dB)
<br />(Hz)
<br />(dB)
<br />(dB)
<br />2.5
<br />-0.76
<br />0.08
<br />-0.39,-1.62
<br />631.0
<br />-0.00
<br />0.02
<br />0.10,-0.11
<br />3.2
<br />-0.51
<br />0.06
<br />-0.24,-1.30
<br />794.3
<br />-0.00
<br />0.02
<br />0.10,-0.11
<br />4.0
<br />-0.34
<br />0.06
<br />-0.14,-1.05
<br />1000.0
<br />0.00
<br />0.02
<br />0.11,410
<br />5.0
<br />-0.23
<br />0.04
<br />-0.07,-0.85
<br />1258.9
<br />0.00
<br />0.02
<br />0.11,410
<br />6.3
<br />-0.15
<br />0.04
<br />-0.03,-0.69
<br />1584.9
<br />0.00
<br />0.02
<br />0.12,410
<br />7.9
<br />-0.10
<br />0.04
<br />0.00,456
<br />1995.3
<br />0.00
<br />0.02
<br />0.12,410
<br />10.0
<br />-0.07
<br />0.02
<br />0.01,446
<br />2511.9
<br />0.00
<br />0.02
<br />0.13,410
<br />12.6
<br />-0.05
<br />0.02
<br />0.02,-0.38
<br />3162.3
<br />0.01
<br />0.02
<br />0.13,410
<br />15.8
<br />-0.04
<br />0.02
<br />0.03,432
<br />3981.1
<br />0.01
<br />0.02
<br />0.14,410
<br />20.0
<br />-0.04
<br />0.02
<br />0.04,-0.28
<br />5011.9
<br />0.00
<br />0.02
<br />0.14,410
<br />25.1
<br />-0.03
<br />0.02
<br />0.05,425
<br />6309.6
<br />0.00
<br />0.02
<br />0.15,410
<br />31.6
<br />-0.03
<br />0.02
<br />0.06,423
<br />7943.3
<br />-0.00
<br />0.02
<br />0.15,411
<br />39.8
<br />-0.02
<br />0.02
<br />0.06,422
<br />10000.0
<br />-0.01
<br />0.02
<br />0.16,412
<br />50.1
<br />-0.02
<br />0.02
<br />0.07,421
<br />12589.3
<br />-0.01
<br />0.02
<br />0.16,-0.14
<br />63.1
<br />-0.01
<br />0.02
<br />0.07,420
<br />15848.9
<br />-0.02
<br />0.02
<br />0.16,418
<br />79.4
<br />-0.01
<br />0.02
<br />0.07,419
<br />19952.6
<br />-0.04
<br />0.02
<br />0.16,424
<br />100.0
<br />-0.01
<br />0.02
<br />0.08,418
<br />25118.9
<br />-0.07
<br />0.02
<br />inf ,-inf
<br />125.9
<br />-0.01
<br />0.02
<br />0.08,417
<br />31622.8
<br />-0.11
<br />0.02
<br />inf ,-inf
<br />158.5
<br />-0.01
<br />0.02
<br />0.08,417
<br />39810.7
<br />-0.19
<br />0.02
<br />inf ,-inf
<br />199.5
<br />-0.02
<br />0.02
<br />0.08,416
<br />50118.7
<br />-0.34
<br />0.02
<br />inf ,-inf
<br />251.2
<br />-0.01
<br />0.02
<br />0.09,415
<br />63095.7
<br />-0.61
<br />0.05
<br />inf ,-inf
<br />316.2
<br />-0.01
<br />0.02
<br />0.09,414
<br />79432.8
<br />-1.18
<br />0.05
<br />inf ,-inf
<br />398.1
<br />-0.01
<br />0.02
<br />0.09,413
<br />100000.0
<br />-2.15
<br />0.05
<br />inf ,-inf
<br />501.2
<br />-0.00
<br />0.02
<br />0.10,412
<br />125892.5
<br />-3.44
<br />0.06
<br />inf ,-inf
<br />1000 Hz measured
<br />level:
<br />118.995 dBpV, -1.005
<br />dB re input
<br />(0.033 dB uncertainty; -1.533 dB to
<br />-0.367 dB
<br />limit)
<br />1 kHz (1/3 Octave)
<br />Noise
<br />Floor : 0.34 pV, -9.40 dBpV
<br />(0.47 dB uncertainty;
<br />-3.00 dB limit)
<br />Flat (20 Hz -
<br />20 kHz) Noise Floor : 6.28 pV,
<br />15.96 dBpV
<br />(0.47 dB uncertainty;
<br />17.00 dB limit)
<br />A -weight Noise
<br />Floor : 1.82
<br />pV, 5.21 dBpV (0.46 dB uncertainty; 13.00
<br />dB limit)
<br />Environmental
<br />conditions:
<br />23.6 °C, 31.4 %RH (0.3 °C,
<br />3 %RH uncertainty)
<br />Uncertainties
<br />are given as
<br />expanded uncertainty at -95 percent confidence level (k = 2).
<br />Test Procedure: D0001.8135
<br />with PRM828.xml
<br />This frequency response
<br />is in compliance
<br />with manufacturers specification for
<br />the item tested.
<br />This report may not be reproduced, except in full, without the written approval of the issuer.
<br />Technician: Sean Childs
<br />Test Date: 28 Aug 2017 11:43:09
<br />Test Location: Larson Davis, a division of PCB Piezotronics, Inc.
<br />1681 West 820 North, Provo, Utah 84601
<br />Tel: 716 684-0001 www.LarsonDavis.com
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