BRUEL & KJAER 1617 - Rear Panel Connections

SELECTIVITY:
RANGE:
FILTER CONTROL MODE :
OUTPUT:
2.2. REAR PANEL
CHASSIS-SIGNAL GROUND :
10
a separate ground terminal. The maximum input voltage is 5 V, and
the impedance is 1 MO in parallel with 100 pF.
A
three-position switch that selects the bandwidth of the filters , and
the centre frequency step length for full-octave scanning . Functions
are as follows:
Upper
position:
third-octave bandwidth with
scanning
in third-octave
steps.
Middle
position: full-octave
bandwidth with scanning
in third-octave
steps, with overlapping .
Lower
position: full-octave bandwidth with scanning in
full-octave
steps.
A
three-position switch to select the narrow band ranges, or "Linear",
for both manual and recorder controlled operation . Functions are as fol-
lows :
Upper position: "Linear" range from 1 Hz to 1 80 kHz, independent of
the position of the MANUAL FILTER SELECTOR .
Middle position: "2 Hz to 160 kHz" , filters are selected automatically ,
or by the MANUAL FILTER SELECTOR from the inner scale on the
MANUAL FILTER SELECTOR.
Lower position: "2 Hz to 40 kHz-D-A-B-C-Lin .", filters are selected au-
tomatically, or by the MANUAL FILTER SELECTOR from the outer scale
on the MANUAL FILTER SELECTOR .
Two switches that control how the filters are selected, plus two LED in-
dicators , one to show whether the instrument is in operation under
manual control, and the other indicating that all front panel controls
are inactive while the i nstrument is being controlled via the Digital In-
terface .
The left-hand switch can select "Manual " so that the filters are
chosen by the MANUAL FILTER SELECTOR and start of Recorder read-
out is impossible, or it can select "Recorder" mode allowing filter selec-
tion to be made by extern a I control .
The right - hand switch enables the Recorder in use to be controlled
from the Band Pass Filter . This facility is blocked when "Manual" has
been selected, or when control is being exercised via the Digital Inter-
face . Two LEOs light to indicate whether "Stop" or "Run" is selected .
Standard B & K coaxial socket, fitting JP 0101 Plugs, paralleled by a
BNC socket on the rear panel. There is a separate ground terminal. Im-
pedance less than 200, minimum load impedance 50 in parallel with
1 nF.
A
pair of clamping terminals with a shorting strap permits the signal
ground to be connected to the instrument chassis .