Rane FPS 28 Handleiding
Rane
Mengpaneel
FPS 28
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OPERATING / SERVICE MANUAL
FPS 28
QUICK START
This section has been provided as a convenience for those without enough patience to read the
entire manual. If you are experienced with this unit or other Rane Flex modules, these few words
should help refresh your memory.
Inputs may be mic or line level. The choice between the two is made by setting the pushbuttons
on the rear of the unit near each input. Balanced inputs use pin 2 as hot, pin 3 as return and case
as shield ground. Unbalanced inputs should be connected to pin 2 for hot and pin 1, signal
ground, for return. The 1/4" expand outputs are to be used for daisy-chaining the inputs to
another destination. These are tip ring sleeve connectors where the tip is hot, ring is return and
sleeve is ground. Alternatively these may be used as inputs.
The outputs are 1/4" tip ring sleeve jacks where the tip is A output, ring is B output and sleeve is
ground. Signal for these outputs may be sourced either before or after the A and B MASTER
level controls. The switches which determine this are located within the confines of the unit’s
covers. All FPS 28s are shipped from the factory with the switches in the POST fader position.
Once inputs and outputs are satisfactorily connected, set the input gains as high as possible
without causing the A and B overload indicators to illuminate steadily with very high input levels.
If 1 x 8 splitter operation is required, only one input is used and the STEREO / MONO switch should
be in the MONO position. If 1 x 4 stereo operation is chosen the switch should be in the opposite
position.
NEVER CONNECT ANYTHING EXCEPT AN APPROVED RANE POWER SUPPLY TO
THE RED THING THAT LOOKS LIKE A TELEPHONE JACK ON THE REAR OF THE FPS
28. This is an AC input and requires special attention if you do not have a power supply EXACT-
LY like the one that was originally packed with your unit. See the full explanation of the power
supply requirements elsewhere in this manual.
SYS TE M CON NE CT I ON
When connecting the FPS 28 to other components in your system for the first time, LEAVE
THE POWER SUPPLY FOR LAST. This gives you a chance to make mistakes and correct them
without damage to your fragile speakers, ears and nerves.
INPUTS. The two inputs on the FPS 28 are balanced. They may also be used in an unbalanced
configuration. Use only shielded cable for inputs. This wire should always be two-conductor plus
shield, even for unbalanced operation. Balanced inputs should be connected to both the “+” pin
2 and “–” pin 3 for signal hot and return. The shield should be tied to case ground. A neutral “pin
1” ground is not necessary (except when using phantom power). For unbalanced use, connect the
hot side of the input cable to pin 2 and signal return to pin 1. It is never necessary on any Rane
Flex module to ground the pin 3 input in the unbalanced mode. It won’t, however, hurt anything if
you do. If the input is coming from another piece of equipment in the signal path, connect the
shield only at the receiving end to help prevent ground induced hum. If a microphone is being
connected to the unit, the shield may be connected to the case of the mic as well as to the ground
terminal on the unit.
OUTPUTS. The FPS 28’s outputs are unbalanced. Channel A is present on the tip of these jacks,
channel B is the ring. Use two conductor shielded cable for this purpose with the shield con-
nected to the sleeve. Shield must be connected on both ends of the cable.
7. POWER INDICATOR. When this yellow LED is illuminated, the foregoing informa-
tion should be correct. If darkness is present at this location, most or all of the above will
be inoperative.
6. OUTPUT LEVEL CONTROLS. Each pair of output controls sets the individual chan-
nel output levels. The inner knob is for channel A, the outer is channel B.
5. STEREO/MONO SWITCH. To make one of the inputs on the FPS 28 available to all
eight outputs, this switch needs to be in the MONO position. In the STEREO mode, Input
A drives bus A only; Input B connects to bus B only.
4. MASTER A AND B LEVEL CONTROLS. These concentric controls set the level to
each of the buses. Output levels may be selected via the four pairs of controls connected to
the output sections. This is true, however, only if the internal PRE/POST switches are in
the POST position (as shipped).
In the PRE position, the Master Level Control is bypassed for that respective output
and only the Input Gain Control and the Output Level Control have any effect on an in-
dividual output.
3. PHANTOM POWER SWITCH. In the ON position, 15VDC phantom power will be
present on both 3-pin inputs on the rear of the module.
2. A AND B OVERLOAD INDICATORS. These red LEDs illuminate whenever the com-
bination of input level and input gain adjustment cause the input amplifiers to reach or ex-
ceed a level equal to 4dB below clipping.
1. INPUT LEVEL CONTROLS. These concentric level controls set the level of each
input to be routed to the channel A bus and the channel B bus. The inner knob controls
the level to be sent to bus A, the outer knob controls the signal applied to bus B. Rotating
the knobs upward together from the “0” position creates a “pan centered” effect. Leaving
one off and increasing the other emulates a full pan to one bus or the other.
FRO NT P ANEL DE S CRI PTIO N
REAR PANEL DESCRIPTION
1. A AND B INPUT CONNECTORS. Use these 3-pin input connectors for either
microphone or line level inputs to be split by the FPS 28. Connect balanced sources to the
respective “+”, “–”
and “GND” pins which are pins 2, 3 and 1 respectively. Unbalanced in-
puts should connect to pins 2 and 1 only. When using an unbalanced input, pin 3 may be left
open or shorted to “GND”.
2. EXPAND OUTPUTS. These two tip-ring-sleeve 1/4" jacks directly parallel pins 1, 2 and 3
of the three pin input connectors. The tip is connected to pin 2, the ring goes to pin 3 and
sleeve jumpers to pin 1. These are to be used in situations where more than a stereo 4-way or
mono 8-way split is required from the same source(s). When expanding to one more FPS 28,
a 1/4" to 1/4" patch may be made. The expand input may also be used as a primary input.
3. MIC /LINE SELECTOR SWITCH. In the out position, the respective input stage is set
for microphone input levels. In the depressed position, line level signals are accepted.
4. OUTPUT JACKS. These four 1/4" tip-ring-sleeve jacks provide all eight outputs of the
FPS 28. Each contains a pair of signals, Bus A is on the tip and Bus B is on the ring. Sleeve is
signal ground.
5. 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 circumstan-
ces it may be necessary to move it to the opposite position to eliminate stubborn hum and
buzz problems. We realize a scientific explanation of this switch would be helpful, unfor-
tunately science doesn’t seem to have much to do with it. See the CHASSIS GROUNDING
note on the last page for details.
If you are tempted to try moving this switch with your power amplifiers turned on or turned
up, DON’T BE. ALWAYS TURN YOUR AMPLIFIER LEVELS DOWN BEFORE
CHANGING YOUR GROUNDS AROUND and then bring them up slowly.
6. POWER INPUT CONNECTOR USE ONLY A MODEL RS 1, FRS 8, OR OTHER
REMOTE AC POWER SUPPLY APPROVED BY RANE. The FPS 28 is supplied with a
remote power supply suitable for connection to this input jack. Consult the factory for re-
placement or substitution.
7. CHASSIS GROUND POINT. A 6-32 threaded hole used for chassis grounding purposes.
See the CHASSIS GROUNDING note on the last page for details.
FPS 28 TOP-REAR COVER REMOVAL PROCEDURE:
To gain access to the internally mounted PRE/POST switches, remove the top/rear cover
following this procedure:
l
1. Remove the five phillips screws securing the top cover to the chassis, using a #2
phillips screwdriver.
l
2. Slide the top/rear panel to the rear and off of the chassis.
l
3. To replace the top/rear cover, reverse the above procedure.
Product specificaties
| Merk: | Rane |
| Categorie: | Mengpaneel |
| Model: | FPS 28 |
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