BRUEL & KJAER 1615 - Use with Frequency Analyzer 2107

4. The 1614/15 controls should be as follows:
5.
POWER
SCANNING
"On"
"Manual"
The 1/3 and 1/1 octave frequency ranges of the 1614 should be
switched on as desired.
Filter
Switch to the filter at which the measurement is carried out.
The INPUT SECTION ATTENUATOR and OUTPUT SECTION
ATTENUATOR knobs should be set such that (a) no overload appears
on either Input or Output stage.
(b) a suitable indicating
meter deflection is obtained, preferably in the
upper end of the scale.
The Signal Level within the chosen filter and referred to the input
measuring arrangement is read according to the method explained in
Instruction Manual 2606.
CALIBRATION
As with the 2603, 2604 calibration of the system can be made either with
reference
to the measuring transducer or as a voltage analyser. For calibrati-
on with respect to the measuring transducer reference should be made to
the appropriate Instruction Manual.
For calibration as a voltage analyser follow procedures 1) and 2) as above
and select
the "ref. 50 mV".
When the 2606 "ref. 50 mV" is switched in, the meter reading should be 50
mV for attenuator settings of 0.1 V and Output Section attenuator of X 1.
If not, suitable adjustment can be made by means of the sensitivity adjust-
ment screws at the Direct or Microphone Inputs.
The Level Recorder Type 2305 can be used with the 2606 and 1614/15 to
automatically scan the Pass-Band Filter Set and record the subsequent
analysis.
4.
USE WITH FREQUENCY ANALYZER TYPE 2107
The 2107 has terminals similar to the 2603/04 for use with the 1614/15. As
with
the 2603/04 when the switch WEIGHTING NETWORK of the
Frequency Analyzer is in External Filter Position and the knob Function
Selector is switched to "Selective Section Off" the 2107 is ready for use.
Calibration
is similar to that for the 2603/04 as is the linear frequency
range.
The 2107 is able to analyse between 20 Hz-20 kHz. If a broad band signal
is to be analysed in this frequency range a 1/1 or , 1/3 octave analysis can be
25