FILTER
CHARACTERISTICS Functions:
Band-Pass. Frequency Range: Low cutoff and high cutoff
frequencies are independently adjustable from 0.2Hz to 20kHz in five
bands.
Band |
Multiplier
|
Frequency
|
1 |
0.01 |
0.2Hz-2Hz |
2 |
0.1 |
2Hz-20Hz |
3 |
1 |
20Hz-200Hz |
4 |
10 |
200Hz-2kHz |
5 |
100 |
2kHz-20kHz
|
Frequency Dials: Separate
low cutoff and high cutoff dials are individually calibrated with single
logarithmic scales reading directly in Hz from 19 to 210. Total effective
scale length for all five bands is approximately 30 inches. Cutoff
Frequency Calibrated Accuracy: ±5% with “RESPONSE” switch in “MAX
FLAT” (Butterworth) position; less accurate in “LOW Q” (RC) position.
Relative to mid-band level, the filter output is –3dB at cutoff in “MAX
FLAT” position and approximately –12dB in “LOW Q” (RC)
position. Bandwidth: Continuously variable within the cutoff
frequency limits of 0.2Hz to 20kHz. For minimum passband (Butterworth
response) the two cutoffs are set to the same frequency, resulting in an
insertion loss of 6dB at that frequency, with 3dB points at 0.8fc below
and 1.25fc. Attenuation Slope: Nominal
24dB/octave. Maximum Attenuation: >80dB. Insertion
Loss: 0dB, ±1dB or 20dB, ±1dB. Response Characteristics:
Choice of 4-pole Butterworth (maximally flat response) for frequency
domain operation and LOW Q (RC) for transient-free time domain operation,
selected by means of a switch on the rear of chassis. |
INPUT
CHARACTERISTICS Maximum
Voltage: ±7V peak in the 0dB gain position, ±0.7V peak in the 20dB
gain position. Maximum DC Component: ±100V. Input
Impedance: 10M ohm in parallel with 50pF.
OUTPUT
CHARACTERISTICS Maximum
Voltage: ±7V peak. Maximum Current: ±1.5mA
peak. Internal Impedance: Approximately 50 ohms. Hum and
Noise: <200µV.
GENERAL Operating Temperature
Range: –10°C to 45°C. Floating (ungrounded) Operation: A
switch is provided on the rear of the chassis to disconnect signal ground
from chassis ground. Front Panel Controls: Low Cutoff Frequency
dial and multiplier switch, High cutoff Frequency dial and multiplier
switch, Power ON switch and gain switch. Rear Panel Controls:
Response switch, ground switch and 115/230V LINE
switch. Terminals: Front and rear panels, one BNC connector for
Input, one for Output. One rear terminal for chassis
grounding. Power Requirements: 105-125 or 210-250 volts, single
phase, 50-400Hz, 10 watts. Dimensions And Weights: 3" (8.9cm)
high, 8" (21.6cm) wide, 13" (34.8cm) deep; 11 lbs (4.9kg) net, 17 lbs
(7.7kg) shipping. Accessories: 3-terminal line cord; operating
manual.
OPTIONS Battery Kit: Part
No. BK-370, battery option will operate up to 10 hours without
recharging. Rack Mounting Kit: Part No. RK-38 permits
installation of the Model 3700 into a standard 19" rack
spacing. Extended 1 Year Warranty: Part No.
EW3700. Specifications subject to change without
notice. |