Xantech RGC11 Installation Instructions Manual

INSTALLATION INSTRUCTIONS

RGC11

REMOTE GAIN CONTROL MODULE

The RGC11, Fig. 1, is an IR Remote Controlled Line Level Gain Control Module. It permits line level gain
control of audio power amplifiers (instead of at speaker level), in multiroom installations, when highest
sound quality is desired. It may also be used in any application where IR remote control of gain is desired,
such as between the pre-out and main-in jacks of integrated amplifiers or receivers that were built without
remote control. Gain control is accomplished by way of infrared commands originating from a Xantech
RC68+ (or RC68) Programmer. The RC68+ commands are "taught" to learning devices and passed to the
RGC11 IR "IN" and "G" terminals via Xantech IR Receivers, Keypads and Connecting Blocks.

RGC11

INPUT

LEFT

RIGHT

LOOP

THROUGH

REMOTE GAIN
CONTROL MODULE

IR CONFIRM

IR

IN G

OUTPUT

15VAC

LEFT

RIGHT

V V

Fig. 1 The RGC11

FEATURES AND SPECIFICATIONS

• Requires RC68+ (or RC68) Programmer IR codes or the MIRV1 for operation.

• Responds to 16 IR commands: Volume Up/Down Ramping, 12 Fixed Levels, Mute ON and Mute OFF.

• IR Confirm LED lights steady when power is applied and blinks off with RGC11 IR commands only.

• Gold plated RCA type input & output jacks.

• Loop-through jacks (not buffered) for "daisy chaining" multiple RGC11’s.

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• Selectable IR code groups. Internal E

PROM can be set to different group codes, allowing different IR
code combinations. This prevents mutual interaction in common IR systems when using more than one
RGC11, or if RGC11's are included with other Xantech products using RC68+ codes.

• Factory preset Group Code number: 30

• 4-terminal plug-in for IR input & power connections, IR IN (= IR Signal), G (= GND), V V= 15VAC. Accepts
wire sizes from 24 to 12 gauge.

• Power Requirements: 15VAC @ 85 mA. (15V AC power supply included).

• Gain: Unity @ Max. V.C.

• Input Impedance: 45 k Ohms

• Output Impedance: 220 Ohms

• Freq. Response: 5 Hz to 70 kHz ± 3 dB.

• THD: < 0.01% @ 2V out.

• S/N Ratio: > 103 dB "A" WTD re 2V out.

• Flanges, plus supplied screws, permits easy mounting to flat surfaces..

• Dimensions: 5-7/8" x 2-3/4" x 1-5/8"

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Remote Control Switchers

RC68+ or (RC68) PROGRAMMER / REMOTE CONTROL

The RC68+ Programmer (available separately) contains all the commands necessary to operate the
RGC11.

• You will need it to program universal learning devices such as the Xantech URC-1 learning remote, the
Xantech Smart Pads, the 590 Programmable Controller, the 710 Fone Link, etc., with commands that
operate the RGC11.

• NOTE: The RC68+ codes operate several other Xantech models as well, such as the RS41AV, CC12,
ZPR68, etc. Therefore, only the button descriptions that apply to the operation of the RGC11 are

listed below. All others should be ignored.

RC68+ BUTTONS THAT OPERATE THE RGC11

1. IR Emitter Lens.

2. Instant Volume Presets. These buttons allow random access or direct preset activation of any of 12

fixed preset levels on the RGC11. This is useful when setting up "audio scene" ambiance levels for
rooms or partial mute actions.

The relationship of the RC68+ buttons to the level attenuation below max. volume is as follows:

RC68+ Button RGC11 Level Attenuation - dB

A > 100 dB (OFF, MIN. VOL)
B57
C52
ADJ-OFF 47
142
237
332
427
523
618

Fig. 2 The RC68+
Programmer

5

1

A B C ADJ-OFF

80 48 10 90 01

1234

00 C0 50 D0 41

INPUT

5678

40 A0 30 B0 21

GLOBAL

20 E0 70 F0 61

BASS

TREBLE

60 88 18 98 09

08 A8 38 B8 29

28 E8 78 F8 69

E-FLAT LAST MAX-V TRIM

68 C8 58 D8 49

OFF C-BAL

E1 89 C9 A9 E9

71 19 59 39 79

F1 99 D9 B9 F9

Z-ADJ

MUTE

ON OFF

VOL

A

2

3

4

713
89
MAX VOLUME 0

3. VOLUME Up/Down. These buttons increase or decrease volume

RC68+ PROGRAMMER

in 2 dB steps between 0 dB and -80 dB. When buttons are held
down, the volume level will change continuously.

4. MUTE ON/OFF. Separate On / Off buttons give positive mute commands without knowing what the

status is. This is very helpful in a remote room when all adjustments are made “blind” without any visual
aids for status.
NOTE: Mute is released (turned off) with a VOLUME (3) or Preset Level button command, in addition
to MUTE OFF (4).

CAUTION: While the RC68+ can be used as a handheld remote control, it is highly recommended it not

be given to the final user for the following reasons:

• Since it includes adjustable code groups, the user may inadvertently alter the installer configurations.

• Since the user requires IR commands from other brands of equipment to control the total system, in ad­dition to those of the RGC11, all commands should be consolidated into one learning device, for easy use.

5. Code Group Numbers. The RGC11 is capable of being set to different IR code groups.

NOTE: When shipped from the factory, the RGC11 is set to code group number 30.

Be sure to set the RC68+ to the same number!

It may be necessary to change the RGC11 to a different code group if it is used in a common IR bus
controlled system with other Xantech RGC11's, to avoid mutual interaction.
Refer to the RC68+ instructions for code group setting procedures.

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RGC11

INSTALLATION – COMMON IR BUS SYSTEMS

Fig. 3 illustrates a typical installation using three RGC11's along with other Xantech products in a 4-room

common IR bus

system. The principles shown should be used as a guide when planning your own specific

installations. It is configured as follows:

1. For simplicity, only three RGC11's are shown. A practical limit would be six RGC11's "daisy-chained"
using the "LOOP THROUG H" jacks as shown. This places a load of 7.5k Ohms (45k Ohms ÷ 6) on
the REC OUT jacks (or other driving source) of the main room receiver, etc. Use a Xantech AV-61
Distribution Amplifier when driving more than six. Each output of an AV-61 will drive as many as six
RGC11's.

NOTE: The REC OUT jacks on the receiver, amp, etc., are used since they provide a fixed output
independent of the main volume control.

common IR bus

2. A

connects the 780-80 "J" Box IR Receiver,the 480-00 "Dinky Link" IR Receiver, and
two Smart Pad3 keypads to each of the three RGC11's. In addition, it connects to a 789-44 Connecting
Block for control of the source components.

3. Since a common IR bus is used, each of the RGC11's and its connected MIRV1 (where used) must
use a different IR Code Group number, so that the volume level in each room can be adjusted
independent of the others. To make code group changes, refer to the RC68+ (or RC68) Programmer
Instructions.

NOTE:

When shipped from the factory, the RGC11 is set to code group number 30. If you use

group 30 or change to a different number, be sure to always set the RC68+ to the same number.

4. When a code group is chosen, "teach" volume commands from the RC68+ Programmer (see Fig. 2)
into learning remote controls (and the keypad), dedicated to each room. You may use the Xantech
URC-1 or URC-2 learning remote controllers for this purpose.

NOTE:

With a Common IR Bus system, you cannot carry the same remote control from room­to-room. You must use a dedicated remote for each room into which you have "taught" the
specific RC68+ code group that operates the specific RGC11 that controls the volume for that
room!

If you wish to carry remotes that have the same codes from room-to-room, use a Dedicated IR Bus
System as shown in Fig. 4.

5. A 490-30 "Micro Link" IR Receiver plugs into the 789-44 for local control of the source equipment (e.g.
equipment behind closed doors, etc.).

6. A "STATUS" system is included. This permits the power "ON/OFF" status of the A/V receiver or
amplifier system to be visible in each of the remote rooms. It also permits the power management
capability of the SmartPad3 to operate.

7. The "STATUS" indicator LEDs on the 780-80 "J" Box IR Receiver and the two SmartPad

's, are

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powered by a 786-00 Power Supply plugged into a "SWITCHED" AC outlet on the A/V receiver or
amplifier system. When the switched outlet is "ON", +12 Volts from the 781C-00 passes through one
of the 4 bus-conductors (STATUS line) to the LED indicators.

NOTE: A resistor can be placed in series with the STATUS terminal at each IR receiver (IR receivers
only, if so equipped) for adjustment of the brightness of the Status LED. See the specific installation
instructions for the IR receiver for details.

NOTE:

their markings as follows:

When connecting system devices, be sure to carefully match up the terminals according to

IR IN or OUT (IR Signal), ST (Status), G (GND and V (+12 VDC).

Power Supply Considerations

Use one 15V AC power supply (included) for each RGC11. Add up the individual currents for each of the
other IR components in the system and choose the power supply accordingly. For instance, use the 781RG
for current demands up to 200 mA. For higher demands up to 1 A, use the 782-00 power supply.

Remote Control Switchers

RGC11

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