Rane FPE 13 - Manual (Page 3)

REAR PANEL DESCRIPTION
1. 3-pin INPUT Connector. Pin 2 is positive, pin 3 is negative and pin 1 is signal
ground. For unbalanced operation, use pin 2 as hot and pin 1 as return.
2. INPUT Expand Connector. This ¼" TRS connector parallels the 3-pin connector
described in item 1. Tip is positive, Ring is negative and Sleeve is signal ground.
3. Terminal Strip INPUT and OUTPUT. The +, – , and COMMON GND terminals
parallel the respective pins in the 3-pin and ¼" connectors. Used for primary Inputs
and Outputs or additional patch connections. Use #6 spades.
4. OUTPUT Expand Connector. This ¼" TRS connector parallels the 3-pin connector
exposed in item 5 below. As before, Tip is hot, Ring is not and Sleeve is signal
ground.
5. 3-pin OUTPUT Connector. Pin 2 is positive, pin 3 is negative and pin 1 is signal
ground. For unbalanced operation, do not short any pins to any others. Active bal-
anced outputs operated in the unbalanced mode use only pin 2 driving the line and
pin 1 acting as the return. Pin 3 should be left disconnected. Grounding pin 3 will not
cause any damage nor will it impair the sound. It only creates extra work for your
audio electrons and is unnecessary.
6. PATCH I/O Connector. This ¼" TRS jack provides an unbalanced I (Input) on its tip
and an unbalanced O (Output) on its ring. Designed for use with tip=send/ring=return
effect loop inserts found on many mixing consoles. This provides an easy means for
patching the unit into effect loops as painlessly as possible, using a single ¼" TRS
stereo patch cable. CAUTION: Use either the PATCH I/O or any of the INPUT and
OUTPUT connectors—Do not use both at the same time. These are not summing
inputs. Only one at a time may be used.
7. GROUND LIFT Switch. This switch provides the ability to separate chassis ground
and signal ground. Normally, this switch should be in the LIFT position. In some
circumstances, moving it to the opposite position eliminates stubborn hum and buzz
problems. We realize a scientific explanation would be helpful, unfortunately science
doesn’t have enough to do with it. If you are tempted to try moving this switch with
your power amplifiers turned on and up, don't be. Always turn your amplifier levels
down before changing your grounds around and then bring them up slowly. Put a
speaker re-coner out of work today!
8. Remote Power Supply Input. The unit is supplied from the factory with a Model RS
1 Remote Power Supply suitable for connection to this input jack. The power require-
ments of the unit call for an 18-24 volt AC center-tapped transformer only. It is not a
telephone jack. Never use a power supply other than the one supplied or a replace-
ment approved by Rane Corporation. Using any other type of supply may damage the
unit and void the warranty. Two years parts and labor is worth safeguarding, don’t you
think?
9. Chassis Ground Point. A 6-32 threaded hole used for chassis grounding purposes.
See the CHASSIS GROUNDING note on the last page for details.