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Table 3. Maximum Allowable Cable Resistances
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LINK IN/LINK OUT Connections
The LINK IN/LINK OUT phono connectors on the mid-rear panel
of the mainframe permit you to dynamically link two or more
systems together. If you require more channels, the 1707C/
1715C mixer/power amplifiers are fully compatible with 1700C
mixer/preamplifier.
The signal appearing at the LINK OUT connector is the
summation of all input channels as mixed by the input channel
level controls. LINK IN is a direct input to a system's mixing
amplifier; it's also a seventh input channel.
To link two units together, connect LINK OUT of system one to
LINK IN of system two. System two will now control the mix of
up to twelve input channels. Please refer to Figure 9 for typical
linking connections.
NOTE:
The LINK OUT signal is not affected by the
compressor/limiter or the E.Q. circuits.
PREAMP OUT/AMP IN CONNECTIONS
The PREAMP OUT signal is a mix of all input channels
processed by the compressor/limiter and tone control circuits.
Normally, you would insert a U shorting bar between the
PREAMP OUT and AMP IN phono connectors on the rear panel.
However, you can remove the shorting bar to patch in an external
equalizer or other signal processing device with a proper level
match of 0.775 vrms nominal. Figure 10 shows a typical
application using an external equalizer or other signal processing
device.
Figure 9. Typical Linking Connections
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Figure 10. Patching an External Equalizer or Other Signal
Processing Device
AUX OUT CONNECTIONS
The auxiliary output (AUX OUT) phono connector on the rear
panel is wired directly (internally) to the AMP IN phono connector.
You can use it to drive a second amplifier or a tape recorder.
Please refer to the 1707C/ 1715C mixer/power amplifier's block
diagram shown in Figure 5.
BATTERY INPUT CONNECTIONS
You can power a system from the battery input connector for
auxiliary operation or standby switchover. The battery input
connector is the three-terminal barrier strip located on the
upper-left rear panel of the mainframe. The system requires
two ±48V DC battery power sources.
To connect the battery backup system to the three-terminal
barrier strip, follow the three steps shown in Figure 11.
Figure 11. Battery Input Connections
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