Contacta HLD7 User manual

1
HLD7
User Guide
April 2018
Hearing Loop Driver

2
Contents
Product Overview
Components
Connections
Suitable Cable Lengths (Metric)
Suitable Cable Lengths (Imperial)
Controls
Set-Up
Troubleshooting
Technical Specication
Standards
3
3
4-5
6
7-8
9
14-19
20-21
22
23
Contacta has a policy of continuous product development, therefore small specication changes
may not be reected in this manual. Images, labels, packaging, accessories and product colours
are subject to change without notice.

3
Product Overview
Components
Our HLD7 is a pioneering modular hearing loop driver for perimeter or
phased array congurations, designed for medium sized facilities such
as meeting rooms, lecture halls, places of worship and small theatres.
The HLD7 is a high eiciency hearing loop driver, meaning that it emits
very little heat from its compact packaging.
1
234
5
1. User Guide
2. Hearing Loop Stickers x 2
3. Rubber Feet x 4
4. Hearing Loop Driver
5. Power Supply
6. IEC Power Lead*
Cable & Equipment: A length of loop cable determined by the loop
design is also required. Hearing loop drivers also require ancillary
equipment for audio feeds, such as a microphone or sound system.
*Plug type varies by country.
6
Note: For large area hearing loop installation instructions, consult the
Large Area Hearing Loop Installation Guide.

4
1. Power Supply Input.
Power Sources - The use of unauthorised power supplies may
cause damage to the unit and may invalidate the warranty.
2. External Port - Status Indicator (Volt-free relay contacts).
3. Phantom power indication for microphone.
4. Input 1 (Microphone) - Balanced XLR with switchable 12VDC
phantom power or ¼” unbalanced TRS jack for electret
microphone with 5VDC power via 680Ω load.
5. Input 2 (Line) - Balanced XLR or ¼” TRS jack to ohmically isolated
input.
6. Expansion.
CAUTION: For connection to other Contacta systems only.
7. Feature - External monitor & control, Contacta communications
processor.
CAUTION: This is not a telecommunications port.
8. NL4 Loop Output Connection.
Connections
Rear Panel Connections:
1
2
34 5
67
8

5
Audio Connections:
2 1
3
Mic & Line
XLR connector
1: Screen/Shield
2: + (Signal Hot)
3: - (Signal Cold)
Mic
Unbalanced TRS Jack
Tip
Ring
Sleeve SOURCE
+ (Signal)
GND
Mic
Unbalanced Mono TS Jack
Tip
Sleeve SOURCE
+ (Signal)
GND
Line
Unbalanced Mono TS Jack
Tip
Sleeve
SOURCE
+ (Signal) hot
- (Signal) cold
Phantom Power
CAUTION: Route loop output cables as far away as possible from the
driver audio input cables.
Connect a twisted pair or quad core loop feeder cables to the supplied
NL4 connector (diagram below). Insert into the NL4 Loop Output
Connection on the rear of the driver.
Loop Connections:

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Current 1A 2A 3A 4A 5A 6A
Cable Type Cable Length
Maximum
Cable
Length
Round
Cable
(CSA)
1mm2531m 266m 177m 133m 106m 89m
1.5mm2623m 311m 208m 156m 125m 104m
2.5mm2700m 350m 233m 175m 140m 117m
Flat
Cable
(Width)
10mm 394m 197m 131m 99m 79m 66m
12.5mm 746m 373m 249m 186m 149m 124m
25mm 987m 493m 329m 247m 197m 164m
Double-Turn Loop
Single-Turn Loop
The tables in this section show the metric maximum cable lengths for
dierent maximum required currents.
No clipping below 1.6kHz (IEC specications):
Example:
If an installed cable is 166m of 1.5mm² (round) single turn and
the required current noted in Step 3 (7) of Set-Up (see page 14)
is 4 amps or greater, the below table indicates that the driver
is clipping.
Suitable Cable Lengths (Metric)
Current 1A 2A 3A 4A 5A 6A
Cable Type Cable Length
Maximum
Cable
Length
Round
Cable
(CSA)
1mm2386m 193m 129m 97m 77m 64m
1.5mm2417m 209m 139m 104m 83m 70m
2.5mm2439m 219m 146m 110m 88m 73m
Flat
Cable
(Width)
10mm 345m 172m 115m 86m 69m 57m
12.5mm 533m 267m 178m 133m 107m 89m
25mm 632m 316m 211m 158m 126m 105m

7
The tables in this section show the imperial maximum cable lengths
for dierent maximum required currents.
No clipping below 1.6kHz (IEC specications):
Example:
If an installed cable is 420 feet of 18AWG (round) single turn
and the required current noted in Step 3 (7) of Set-Up (see
page 14) is 4 amps or greater, the below table indicates that
the driver is clipping.
Suitable Cable Lengths (Imperial)
Current 1A 2A 3A 4A 5A 6A
Cable Type Cable Length
Maximum
Cable
Length
Round
Cable
(AWG)
18AWG 1638ft 819ft 546ft 409ft 328ft 273ft
14AWG 2187ft 1093ft 729ft 547ft 437ft 364ft
Flat
Cable
(Width)
18AWG
(equivalent)
1843ft 921ft 614ft 461ft 369ft 307ft
14AWG
(equivalent)
2912ft 1456ft 971ft 728ft 582ft 485ft
Double-Turn Loop
Single-Turn Loop
Current 1A 2A 3A 4A 5A 6A
Cable Type Cable Length
Maximum
Cable
Length
Round
Cable
(AWG)
18AWG 1197ft 598ft 399ft 299ft 239ft 199ft
14AWG 1367ft 684ft 456ft 342ft 273ft 228ft
Flat
Cable
(Width)
18AWG
(equivalent)
1447ft 723ft 482ft 362ft 289ft 241ft
14AWG
(equivalent)
1898ft 949ft 633ft 475ft 380ft 316ft
See next page for “No clipping below 5kHz (Pro)” maximum cable lengths .

8
No clipping below 5kHz (Pro):
Example:
If an installed cable is 406 feet of 18AWG (round) single turn
and the required current noted in Step 3 (7) of Set-Up (see page
14) is 3 amps or greater, the below table indicates that the
driver is clipping.
Current 1A 2A 3A 4A 5A 6A
Cable Type Cable Length
Maximum
Cable
Length
Round
Cable
(AWG)
18AWG 718ft 359ft 239ft 180ft 144ft 120ft
14AWG 750ft 375ft 250ft 188ft 150ft 125ft
Flat
Cable
(Width)
18AWG
(equivalent)
922ft 461ft 307ft 231ft 184ft 154ft
14AWG
(equivalent)
1063ft 531ft 354ft 266ft 213ft 177ft
Double-Turn Loop
Single-Turn Loop
Current 1A 2A 3A 4A 5A 6A
Cable Type Cable Length
Maximum
Cable
Length
Round
Cable
(AWG)
18AWG 442ft 221ft 147ft 110ft 88ft 74ft
14AWG 449ft 225ft 150ft 112ft 90ft 75ft
Flat
Cable
(Width)
18AWG
(equivalent)
581ft 290ft 194ft 145ft 116ft 97ft
14AWG
(equivalent)
640ft 320ft 213ft 160ft 128ft 107ft

9
Shows MIC level Shows LINE level Shows DRIVE level
To enter adjustment mode press
both MIC + and - simultaneously
In adjustment mode the
STATUS LED will ash
CLIP
ACTIVE
PHTM
CLIP
ACTIVE
LOW SIG
STATUS
POWER
MIC LINE DRIVE
PERIMETER
PRIMARY
SECONDARY
contacta HLD7 12 3 4 5 6
- -
CLIP
ACTIVE
PHTM
CLIP
ACTIVE
-20DB
STATUS
POWER
MIC LINE DRIVE
PERIMETER
PRIMARY
SECONDARY
contacta HLD7 12 3 4 5 6
- -
CLIP
ACTIVE
PHTM
CLIP
ACTIVE
-20DB
STATUS
POWER
MIC LINE DRIVE
PERIMETER
PRIMARY
SECONDARY
contacta HLD7 12 3 4 5 6
- -
Controls
Front panel overview:
Driver modes
Normal operation mode – The driver is fully functional. The controls
on the front do not change the driver operation.
Adjustment mode – In this mode one can adjust all of the levels using
the + or – buttons.
Pressing the MIC + or - will
adjust the MIC input gain;
adjustments are in 1dB steps.
LEDs show the MIC’s level
after fader
Pressing the LINE + or - will adjust the
LINE input gain; adjustments are in 1dB
steps. LEDs show the LINE level after
fader. If input is low the LOW SIG LED
will illuminate
Pressing the Drive + or - will
adjust the Drive output by
1dB steps. LEDs show the
approximate DRIVE level.
CLIP
ACTIVE
PHTM
CLIP
ACTIVE
LOW SIG
STAT US
POWER
MICLINEDRIVE
PERIMETER
PRIMARY
SECONDARY
2.5 5 7.5 10
contacta HLD9
CLIP
ACTIVE
PHTM
CLIP
ACTIVE
LOW SIG
STAT US
POWER
MICLINEDRIVE
PERIMETER
PRIMARY
SECONDARY
2.5 5 7.5 10
contacta HLD9
CLIP
ACTIVE
PHTM
CLIP
ACTIVE
LOW SIG
STATUS
POWER
MIC LINE DRIVE
PERIMETER
PRIMARY
SECONDARY
contacta HLD7 12 3 4 5 6
- -
CLIP
ACTIVE
PHTM
CLIP
ACTIVE
LOW SIG
STATUS
POWER
MIC LINE DRIVE
PERIMETER
PRIMARY
SECONDARY
contacta HLD7 12 3 4 5 6
- -
Note: Before entering a driver mode or making any changes, a loop
must be connected to the HLD7.

10
You must rst be in adjustment mode (see page 7). To enter the
engineers mode, press both Line + and - simultaneously.
Engineers mode – In this mode there are additional items that can
be adjusted, such as driver type, phantom power and high frequency
compensation.
CLIP
ACTIVE
PHTM
CLIP
ACTIVE
LOW SIG
STAT US
POWER
MICLINEDRIVE
PERIMETER
PRIMARY
SECONDARY
2.5 5 7.5 10
contacta HLD9
CLIP
ACTIVE
PHTM
CLIP
ACTIVE
LOW SIG
STAT US
POWER
MICLINEDRIVE
PERIMETER
PRIMARY
SECONDARY
2.5 5 7.5 10
contacta HLD9
CLIP
ACTIVE
PHTM
CLIP
ACTIVE
-20DB
STATUS
POWER
MIC LINE DRIVE
PERIMETER
PRIMARY
SECONDARY
contacta HLD7 12 3 4 5 6
- -
There are 5 PAGE settings, each identied by a ashing MIC LED:
PAGE 1 is LED 1, PAGE 2 is LED 2, etc.
Press both Line + and - simultaneously
to enter the Engineers’ mode
CLIP
ACTIVE
PHTM
CL
IP
A
CTIVE
LOW SIG
STATUS
POWER
MIC LINE DRIVE
PERIMETER
PRIMARY
SECONDARY
contacta HLD7 12 3 4 5 6
- -