BRUEL & KJAER 2305 - Specification

4409
462335
Fig. 4.9. Sketch showing the arrangement of the Synchro-starter, Two
Channel Selector, and Filten in the Response Test Unit Type 4409.
Filters. These are equalizing filters. (Linear and I.E . C. curves no. 2 and 3)
which are intended to be used in combination with the B & K Monophonic
or Stereophonic Gliding Frequency Records Type QR 2007 or QR 2009
respectively in gramophone recording systems .
Starting Signal:
Inpnt Impedance:
Power
Supply:
SPECIFICATION
Syncbro-starter
1000 Hz (cIs) ± 100 Hz (cis) with a voltage range
0.1 to 32 Volts (at 1000 Hz (c Is)) ha ving a duration
of at least 0.1 second.
10 k,Q during pr e sence of the 1000 Hz (c Is ).
170 k,Q paralleled by 440 pF during test.
Powered from the Level Recorder .
Two Channel Selector
Switching Frequency: 1.2 Hz (cis), 0.4 second measurin g time on each
channel.. Transients less than 20 m sec.
Switching Capabilities: 30 V A, maximum 100 V, 1 A.
Drive:
Input Capacitance:
62
Free-running multivibrator, powered from tbe
Level Recorder.
40 pF approx. parallel capacitance on each cbannel
including Connecting Cable AO 0018 on "Channel
Output" .