Connecting Unbalanced Rca To Balanced Mini Phoenix; Making An Ef Bus Terminator - Polycom Vortex EF2241 Reference Manual

C U
ONNECTING NBALANCED
RCA Male
Tip
Ring
Figure 31. Cable construction for connecting unbalanced RCA to balanced mini Phoenix (3 conductor terminal
block).
M EF B
AKING AN
Figure 32. The terminator
Instructions
© Polycom, Inc.
RCA
TO
Red
Black
1. Connect RCA Tip to Phoenix pin 1.
2. Connect RCA Ring to Phoenix pin 2.
3. Connect Phoenix pin 3 to Shield, and leave Shield floating on RCA end.
Caution!
Do NOT connect the shield at both ends.
Caution!
On the EF2241, Phoenix pin 3 is connected to
chassis ground. Under no circumstances should
Phoenix pin 3 be connected to pin 1 or to pin 2.
Doing so will add noise to the audio signal.
T
US ERMINATOR
1 2 3 4 5 6 7 8
To make a terminator (for use when connecting EF2280s), use an RJ45 connector.
Connect pin 3 to pin 6 with an 110 Ohm resistor. A terminator is not required for the
EF2241 as it is built in.
B M
ALANCED INI
110
53 V
C P
ONNECTOR
P
HOENIX
Mini (3.5 mm) Phoenix
+
Red
Black -
Shield
EF2241 Reference Manual
ORTEX
INOUTS
1
2
3