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2.4 DUBBING Output QO
This socket is for convenient tape copying onto a second open-reei
or cassette tape recorder. Using UHER Stereo Connecting Lead K 541,
connect this DUBBING socket to the RADIO socket of the recording
tape machine. Output signals delivered to pins 3/2 and /2 (2 = ground)
are approximately 750 mV (output impedance less than 15 kohms).
2.5 RADIO Input/Output | j
This socket is a combined input and output for connection to a stereo
tuner or receiver with DIN standard sockets. For record or playback use
UHER inter-unit Stereo Lead K 541 to connect the SG 631 LOGIC to
the TAPE socket of the tuner or receiver.
With mono equipment, UHER Adapter K 837 must be inserted into the
TAPE socket of the mono set before using the K 541 lead to make
connection to the SG 631 LOGIC.
To avoid loss of response in the high frequency range during record
and playback, the connecting lead (K 541) should be extended only
by a service technician, and then only if the output impedance of the
input source or the input impedance of the playback equipment per-
mits. Input signals at pins 1/2 and 4/2 (2 = ground) of this socket may
be between 1 mV and 200 mV (input impedance 27 kohms). For in-
put voltages over 250 mV, it is advisable to use the PHONO input socket.
Output signals delivered to pins 3/2 and 5/2 (2 = ground) are appro-
ximately 750 mV (output impedance maximum 15 kohms).
2.6 PHONO Input ©
This socket is Tor connecting stereo record players with DIN plugs and
crystal pickup cartridges. Record players with magnetic pickup must be
equipped with their own equalizing amplifier. High-impedance equip-
ment (e.g. stereo tape or cassette recorders, stereo receivers or UHER
mixer Mix 500 A 124) may also be connected to this socket, using UHER
Stereo Lead K 541.
and 10 V (input impedance 680 kohms).
2.7 DIA (Slide) ^
This socket is for connecting automatic slide projectors via UHER Pro-
jector Lead K 911. Pins 2 and 3 are for slide changing by signalling
the "Dia-Pilot" of the SG 631 LOGIC to scan the 1 kHz pulses recorded
on the tape. The "Dia" tape head run-out to pins 4 and 6 (6 = ground)
permits control of multi-vision projectors that operate with pulses up
to 7 kHz. In addition, this tape head is also for record and playback
of the pulses responsible for synchronizing tape recorder and projector
in 8 mm and 16 mm film dubbing.
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