Instrument Combinations - BRUEL & KJAER 1022 Instructions And Applications

Instrument Combinations
Wilh the B.F.O. Type 1022, Briiel & Kjrer introduces quite a new instrument.
The B.F.O. Type 1022 is delivered in a metal case but should it be preferred
to have it housed in a mahogany cabinet, then this alteration can be carried
out very simply.
1. Remove the four special threaded retainers, located at the back of the
case and the rubber feet.
2. Place instrument and metal case into the mahogany cabinet.
3. Replace the threaded retainers and the rubber feet, which now require
longer fixing screws.
If
it is required to have the equipment rack mounted then a special frame
is necessary. In this case the instrument
+
cabinet is secured to the frame
by four screws. This whole assembly is then mounted in a 19" standard rack.
Finally if it is preferred to use a B & K combination mounting unit then
the instrument in a metal case is placed in the mounting unit and secured
by four screws, but care must be taken to connect the instrument to ground.
The apparatus is isolated from the mounting unit, but, however, the Level
Recorder Type 2305 is the only instrument, which is in direct connection
with the chassis of the combination mounting unit.
The Beat Frequency Oscillator Type 1022 can be delivered in the following
combina lions:
Combined Inst. Sep. Inst.
Type 3308 1022
+
2305
Type 3329 1022
+
2603~
+
2305
Type 3331 1022
+
2107
+
2305
Type 3332 1022
+
2112
+
2305
and the type Nos. stand for :
1022: Beat Frequency Oscillator.
2305: Level Recorder.
2603: Microphone Amplifier.
2107: Frequency Analyzer.
2112: Audio Frequency Spectrometer.
For a comprehensive technicaJ description of the Spectrometer, the Micro-
phone Amplifier, the Frequency Analyzer and the Level Recorder, reference
should be made to their resp-e'C tive manuals. However, a brief outline of
their basic principles is given in' the following paragraphs.
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