DESCRIPTION
The NEW
Krohn-Hite Model 39128 Multichannel Filter/Signal
Conditioning System is a mainframe
chassis that houses up
to sixteen, 8-channel plug-in filter/amplifier cards
providing as many as 128
channels of cost effective
signal conditioning over the frequency range from 1Hz to
100kHz.
Each
plug-in card can be a filter, an amplifier or a mix of
filters with gain or amplifiers. The
individual channels
of the Model 39128 can be a low-pass, high-pass
and band-pass filter with
either Butterworth or Bessel
responses. The attenuation slope of each channel can also
be
specified between 6dB to 48dB/octave, with cutoff
frequencies in the range from 1Hz to 100kHz.
The
flexibility of the design also allows for each channel to
be a filter with pre and post-filter gain
from 1 to 100
in 1% increments. Input configurations may also be
differential or single-ended.
INPUT AND OUTPUT
CONNECTIONS
The Model 39128
is provided with two options for input and output
connections. The first
option
uses thirty-two 25-pin D-connectors for all input
and output connections. A pair of connectors
accommodates
an eight channel plug-in card (one for input and one for
output).
The second
option, uses two screw-down 12-position plugs for eight
input channels for a total of 32
input plugs, two for
each plug-in card. The output connections are made
through four 64-pin DIN
connectors (3 row format). Each
connector provides the outputs for four 8-channel cards
or 32
channels.
SPECIFICATIONS
FILTER
CHARACTERISTICS
Cutoff
Frequency Accuracy: 2% standard; 1% available.
Temperature Coefficient: 0.05%/°C.
Passband Response Deviation from Theoretical
(non-inverting):
Low-Pass: 1Hz to 50kHz, ±0.1dB; to 100kHz, ±0.2dB.
High-Pass (small signal, 0.4Vp-p): Input frequencies to
200kHz, ±0.1dB, -3dB point approximately 2.5MHz.
Stopband Attenuation (Signal Rejection):
Low-Pass: >100dB to 100kHz, >80dB to 1MHz.
High-Pass: >100dB.
2% standard; 1% available.
Temperature Coefficient: 0.05%/°C.
|
Harmonic
Distortion: |
Input Frequency
|
Distortion
|
10Vp-p
|
20Vp-p
|
<2kHz
|
0.003% (-90dB)
|
0.006% (-84dB)
|
2kHz to 20kHz
|
0.015% (-76dB)
|
0.03% (-70dB)
|
20kHz to 200kHz
|
0.15% (-56dB)
|
0.3% (-50dB)
|
INPUT CHARACTERISTICS
(with no input gain)
Impedance:
10k ohms or greater. Impedance will vary depending upon
cutoff frequency selected
or specified with input buffer.
Voltage Range: ±10V peak.
Maximum Safe Voltage: ±15V.
INPUT
GAIN CHARACTERISTICS
Gain: 1
to 100 in 1% increments (0dB to 40dB in 0.1dB
increments).
Input Impedance: 1M ohms or specified.
Maximum Voltage Without Damage: ±15V.
Input Type: FET.
Bias Current: Single-ended input, typically 10pA,
200pA max.; differential input, typically 2nA,
10nA max.,
(5nA max. offset current).
Gain Bandwidth (GB) Factor for Determining Useful
High-Pass Bandwidth: 2MHz.
Differential Gain:
Input Impedance: to common ground 100k ohm or
specified.
Common Mode Maximum Signal Amplitude: (differential
signal) X (input gain) + (common mode
signal)
must be
<±10V peak.
CMMR: >80dB to 60Hz with a gain of 1; >100dB
with a gain of 10 or greater.
Maximum Common Mode or Differential Mode Without
Damage: ±60V.
Gain Bandwidth: Typically 1MHz with unity input
gain; 200kHz, X100 input gain; full power
bandwidth,
typically 65kHz.
OUTPUT
CHARACTERISTICS
Impedance:
<0.1 ohms to 200kHz.
Linear Operating Range: ±10V peak (typically
±11V peak).
Low-Pass Maximum Voltage: 20Vp-p (22p-p typical),
DC to 100kHz or limited by input amplifier.
<0.1 ohms to 200kHz.
Linear Operating Range: ±10V peak (typically
±11V peak).
Low-Pass Maximum Voltage: 20Vp-p (22p-p typical),
DC to 100kHz or limited by input amplifier.
|
High-Pass
Maximum Voltage: |
Input Frequencies
|
Output Voltage
|
1Hz
|
to
|
200kHz
|
20Vp-p
|
200kHz
|
to
|
500kHz
|
10Vp-p
|
500kHz
|
to
|
1MHz
|
4Vp-p
|
Maximum
Current (2k load):
±5mA peak with 10V output.
Offset Voltage (RTI): <10mV settable to zero
with offset control.
Offset Temperature Coefficient (RTI):
<0.2mV/°C.
Noise (with input shorted to ground and detector
bandwidth of 5Hz to 300kHz): typically
25µV, 50µV rms max. referred to input.
Noise Spectral Density: <100nV/ÖHz, 100Hz to 300kHz, typically
40nV/ÖHz. For 8-pole
Butterworth
modules specification may be 3 times higher near the
cutoff region.
Signal-to-Noise Ratio (at 7V rms): >100dB.
OUTPUT GAIN CHARACTERISTICS
Gain: 1
to 100 in 1% increments (0dB to 40dB in 0.1dB
increments).
Gain Bandwidth: 100MHz for output gains of 5 or
greater. For gains less than 5, max. useful
bandwidth is
a fixed 20MHz.
Operating Range: ±10Vp-p, ±11Vp-p typical.
Maximum Current (2k load): ±5mA peak with 10V
output.
1
to 100 in 1% increments (0dB to
40dB in 0.1dB
increments).
Gain Bandwidth: 100MHz for output gains of 5 or
greater. For gains less than 5, max. useful
bandwidth is
a fixed 20MHz.
Operating Range: ±10Vp-p, ±11Vp-p typical.
Maximum Current (2k load): ±5mA peak with 10V
output.
GENERAL
Power
Requirements:
90-132/180-230
volts ac, 50-60Hz; 40 watts.
Dimensions: 10.81” (27.46cm) deep; 7.0” (17.78cm) high; 19.0”
(48.26cm) wide.
Weight: 18 lbs (8.16kg) net; 25 lbs (11.34kg) shipping.
Output Short Circuit Protection: Limited to short duration.
Operating Temperature Range: 0ºC to +40ºC.
Storage Temperature Range: -25ºC to +85ºC.
Specifications apply at 25ºC ±5ºC.
Specifications subject to change without notice.
The
performance characteristics listed here are for an optimum
design. Performance
improvements in specific areas are possible with compromises in other areas.
Copyright ©
March 01, 2006
Krohn-Hite Corporation. All rights reserved.
15 Jonathan Drive, Unit 4, Brockton, MA 02301-5566 U.S.A.
Tel: (508) 580-1660; Fax: (508) 583-8989; info@krohn-hite.com
