VU
Line Input
Key Lock
Microphone
Down
Up
min
max
Phantom Phase
Limit Peak
Fault 1 2
HOT!
1
2
7
8
9
4
3
Display Indicators
1
(Left)
and
4
(Right):
Selects menus to make adjustments.
2
(Down)
and
4
(Up):
Adjusts settings for a selected function.
3
Fault 1 & 2:
Indicates that either loop 1 or loop 2 have shutdown due to
overheating or excessive heat.
4
Limit:
Lights to confirm the AGC circuitry is functioning.
Peak:
Indicates that the amplifier is delivering its maximum design
current.
5
VU meter:
The row of lit blocks show the instantaneous amplitude of
the audio. If Loop 1 or Loop 2 is selected, the VU meter shows
the amplitude of the loop current.
For other menu selections, the VU meter shows the amplitude
of mixed inputs.
6
Adjustment bar:
When a function with a level is being adjusted, this bar wil
progressively light up as the signal strength is increased.
Min setting is 0% and max is 100%.
7
Phantom:
Lit when phantom voltage is selected for a microphone
input.
8
Phase:
Lit when phase shift is selected between two hearing loops.
9
HOT!:
Indicates the output stage is getting hot and the amplifier
may shutdown to protect it from overheating.
5 of 16
SigNET PRO Range Instructions
Approved Document No. DAU0000105 Rev 2
AMPLIFIER OPERATION
Unlocking the Amplifier
The amplifier has an anti-tamper, lock out facility which prevents unwanted adjustments being
made, as shown below.
To unlock, use the Next
4
button to select a digit, then use Up
4
button to change the digit.
Finally, press Enter
button to confirm.
The unlock code is
3 3 3 3
and is not user adjustable
.
Cancel
Next
Enter
Up
Enter Unlock Code
0 0 0 0
1
2
5
6
Wall-Mount Model Nos.
PRO5/SW, PRO7/SW, PRO11/SW, PRO5/DW, PRO7/DW, PRO11/DW
12 of 16
SigNET PRO Range Instructions
Approved Document No. DAU0000105 Rev 2
Neutral (N)
230 Va.c.
(L)
Earth
L
FUSE
Fuse
T5A
H 250V
N
WARNING: DO NOT ATTEMPT TO CONNECT MAINS SUPPLY TO THE AMPLIFIER UNLESS
ALL COMPONENTS ARE SECURELY INSTALLED IN THE ENCLOSURE! THIS IS A PIECE OF
CLASS 1 PERMANENTLY CONNECTED EQUIPMENT AND MUST BE EARTHED.
Mounting
Using the five mounting holes provided, mount the metal base securely onto a vertical wall,
≤
2m mounting height. Assess the condition and construction of the wall and use suitable screw
fixings for the in-service weight of the product. The mounting holes are suitable for use with
ø
4-
5mm countersunk screws. Any dust or swarf created during the mounting process must be kept
out of the enclosure and due care must be taken not to damage any wiring or components.
Remove knockouts
Decide how the wiring will be brought into the amplifier and
remove the required knockouts for cable entry. A typical
SigNET PRO system would require knockouts for 230Va.c.
mains, loop cable(s), microphone, line in and outreach plates.
Knockouts should be removed with a sharp, light tap using a
6mm flatbladed screwdriver. If a knockout is removed fill the
hole with a good quality 20mm strain relief, cable gland.
Observe proper segregation of wiring
Mains, loop and low power wiring must not come into contact,
i.e. do not feed wiring through the same gland or allow wires
of one type of connection to cross those of another.
Connecting Mains
Terminate the mains input
cable (Live, Neutral, Earth) to
the fixed mains connector in
the base of the enclosure
(shown left and above).
The 230Va.c. cable MUST
enter the enclosure via one of
the knockouts at the top left-
hand corner of the enclosure.
All wiring should be installed
in accordance with the current
edition of the IEE Wiring Regs
(BS 7671), or relevant
local/national standards. This
equipment requires fixed
wiring, using three core cable
(
≥
1.0mm
2
, <2.5mm
2
), fed from
an isolating switched fused
spur at 3A, or a 6A Type B
circuit breaker to IEC/EN
60898-1, or suitable fuse.
Mains Wiring
LOOP 1
LOOP 2
OPTICAL
RELAY
NO COM NC
LINE OUT
0V
A-
A+
OUTREACH
0V
A-
A+
V+
LINE IN
MICROPHONE
0V
A-
A+
0V
A-
A+
IF FITTED
A-
A+
A-
A+
IF FITTED
Main PCB
Power
Supply
PCB
L
FUSE
N
The metal lid may be removed for ease of mounting.
Undo the two screws at the top of the front panel using a pozidriv screwdriver.
The amplifier is surface mounted using the five mounting holes in the unit’s base
(shown below). Mounting holes are designed for
ø
4-5
mm countersunk screws.
THIS
WAY UP
Ensure the earth strap
is connected to the
earth tag on the lid.
VU
Line Input
Key Lock
Microphone
Down
Up
min
max
Phantom Phase
Limit Peak
Fault 1 2
HOT!
