BRUEL & KJAER 1623 - Rear Panel

2.2. REAR PANEL
· f'~ · Fwd.&
liF! ·I· Rev.
Fwd .
" Only
E. ><t . Power Supply Filter
Output
Made in Denmark
)f CAUTION
CHARGE VOLTAGE MUST ONLY
BE APPliED WHEN USING
RECHARGEABLE BATTERIES
Fig.2.2. Rear panel of the Tracking Filter Type 1623
RECORDER SYNC.: An 8 pin DIN socket giving access to the various synchronisation sig-
nals for X-Y and level recorders.
10
Pin 1 carries forward-reverse instruction for Level Recorder Type
2306 and 2309.
Pin 2 signal ground.
Pin 4 carries pen down instruction for Level Recorder Type 2309 and
for an X-Y recorder. When RECORDER SYNC. Reset Fwd. or
Reset Rev. are depressed pin 4, which is normally grounded, is
opened
to lift the pen until the reset condition is achieved.
Pin 7 carries a pulse output for automatic synchronisation of the re-
cording paper on the Portable Level Recorders Type 2306 and
2309.
Pin 8 carries a DC ramp voltage which is logarithmically proportional
to the filter tuned frequency (2Hz to 20kHz covers approx. 0 to
7 V). Intended for controlling one of the axes of an X-Y recorder.
DC ramp for X- Y recorder
0-7 V = 2 Hz- 20kHz
Output impedance 2,2 k.Q
Ground
Paper synchronization for 2306 and 2309
Pen lift for 2309 and for X-Y recorder
(Pin 4 normally grounded, is opened
while 1623 is resetting)
110306 / 1
Fig.2.3 . Pin designations for RECORDER SYNC. socket viewed from
outside