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INSTALLATION INSTRUCTIONS
THE GATEKEEP-IR™
SYSTEM MANAGEMENT CONTROLLER
GMM1A
GCM1
IR IN
CURRENT
SENSOR
GEM1
GAM1
GVM1
GTM1
GLM1
VIDEO IN
TEMPERATURE
SENSOR
LIGHT
SENSOR
THRESHOLD
THRESHOLD
L
+
–
IN
5V to 30V AC or DC
R
VOLTAGE
SENSOR
IR OUT
VIDEO OUT
AUDIO
L
CONFIRM
THRESHOLD
OUT
R
POWER
STATUS
STATUS
STATUS
STATUS
STATUS
STATUS
ON
ON
ON
ON
ON
ON
IR OUT
IR OUT
IR OUT
IR OUT
IR OUT
IR OUT
+12V
G
CI
S
12VDC

GENERAL
The GATEKEEP-IR is a modular control system that can sense AC current, AC or DC voltages, audio, video,
temperature and light. The modular sensors permit positive power management and/or selective control of
components in home theater or whole house A/V systems.
• One sensing module is used for each controlled component.
• The availability of six unique sensing modules permits status control of virtually any type of component.
• Sensors respond to each component's power ON or OFF status. The GATEKEEP-IR thus keeps the
correct power state by executing power commands only as needed, regardless of preexisting conditions.
• Gating commands, from the Xantech RC68 handheld IR Programmer, are used for system control.
• Sequenced commands (macros), for gating and operational commands, are programmed into IR
sequencing (macro) capable devices, such as the Smart Pad2, universal remotes, controllers, touch pads,
etc.
• Unique RC68 GATEKEEP-IR ON and OFF codes are placed just before component power commands
for fail-safe power management. They act as keys so that power commands are allowed to pass only
when a corresponding ON or OFF status of a component is sensed by the Gate.
• The GATEKEEP-IR also acts as a Smart Router for multiple same brand components, such as VCR's and
SAT receivers. Again, RC68 prefix and suffix IR codes are used to accomplish this.
• As delivered from the factory, each module is set to IR Code Group number C8.

1
Remote Control Switchers
Fig. 1 The Gatekeep-IR (shown with 6 sensing modules and 2 slot covers installed)
GATEKEEP-IR MODULE DESCRIPTIONS
The Gatekeep-IR system consists of a nine-slot Mounting Bracket Module, a Master Module, six Sensor
Modules and Slot Covers for empty (unused) slots. Descriptions of each follow. (A two-slot Mounting
Bracket Module, GMB2, is also available for single sensor applications).
GMM1A
Red Stripe. NOTE: Ribbon cable must be oriented
so that conductor with red stripe is facing this way.
IR IN
IR OUT
1
2
3
4
5
6
7
8
8-Pin Female Connectors (nine total).
CONFIRM
Sensor Module
8-Conductor Ribbon Bus Cable Slot Numbers
provides voltage, signal, ground
and slot number addressing logic
for the modules.
POWER
+12V
NOTE: The GMM1A Master Module must always be mounted
in the extreme left position and plugged into the left-most
8-Pin connector on the ribbon cable.
The Sensor Modules may be mounted in any order you desire
in slots 1 through 8.
G
CI
S
12VDC
GS1 Empty Slot Covers.
Use as needed to
cover unused slots.
CAUTION: Because the modules are static sensitive, be sure
you and the modules are static neutral before plugging or
unplugging them (by using a wrist grounding strap, etc.).
Mounting rails and holes for modules

Fig. 2 GMB9 GATEKEEP-IR Module Mounting Bracket
GMB2 Dimensions: 2-3/8" (61mm) x 5-7/8" (148mm) x 2-1/2" (64mm)
GMB9 Dimensions: 11-1/2" (292mm) x 5-7/8" (148mm) x 2-1/2" (64mm)
GMM1A
Master Module
GMM1A Dimensions: 1-1/8" (29mm) x 5-9/16" (141mm) x 2-1/8" (54mm)
1
1. Mounting Screws. These fasten the GMM1A into a GMB9 or GMB2 Mounting
Bracket Module.
2
2. IR IN. 3.5mm mono mini jack accepts standard IR signals from Xantech
Connecting Blocks, Controllers, etc.
3
3. IR OUT. 3.5mm mono mini jack provides a buffered IR output signal to drive
a 2nd Gatekeep-IR, emitter, etc.
4
4. CONFIRM LED. Lights when IR signal is received.
GMM1A
IR IN
IR OUT
CONFIRM
5. POWER LED. Lights when unit is powered by an active 12 V power supply.
5
6
6. IR Input. Four terminal plug-in connector allows connection, via the standard
Xantech 3-wire bus, to any Xantech IR receiver, keypad or controller. Connector
markings are defined as follows: +12V= +12VDC, G=GND, CI=Control Input
and S=IR signal.
7
The CI (Control Input) terminal, when driven high (> +5 V), inhibits Group Off
commands for all modules. Used for power management in zoned systems.
See pages 16 and 18.
1
7. 12VDC. All modules are powered through this 2.1mm power jack. Center pin
is +. Use a 782-00 Power Supply. See Power Supply Considerations.
POWER
+12V
G
CI
S
12VDC

Fig. 3
CAUTION: Be sure power is OFF when plugging modules into or unplugging them from the ribbon cable connectors.
2

GATEKEEP-IR
GATEKEEP-IR MODULE DESCRIPTIONS (continued)
GCM1
Current Sensor
Module
GCM1 1-1/8" (29mm) W x 5-9/16" (141mm) H x 2-1/8" (54mm) D
1. Mounting Screws.
1
GCM1
2
2. CURRENT SENSOR Input. 3.5mm mono mini jack accepts current sensing
signal from 120V AC adapter box plugged in-line with the AC cord of the desired
component.
3. THRESHOLD. Allows adjustment of current sensing threshold (>20 mA to <10 A)
to be within the ON/OFF AC current range of the controlled component.
CURRENT
SENSOR
3
THRESHOLD
4. STATUS. 3.5mm mono mini jack delivers a constant + 12 VDC output (9V @ 30
mA) when an AC ON condition of a sensed component is detected.
5. ON LED. Lights when an AC ON condition of a sensed component is detected.
6. IR OUT. 3.5mm mono mini jack sends the gated IR command signals to the
controlled component (via an IR emitter, direct IR input jack, etc.).
STATUS
4
ON
5
IR OUT
6
1
GEM1 1-1/8" (29mm) W x 5-9/16" (141mm) H x 2-1/8" (54mm) D
1. Mounting Screws.
2. VOLTAGE SENSOR Input. Plug-in 2-terminal connector. 5
Volts (@ 5 mA) to 30 Volts (@ 30 mA), AC or DC, at this input
causes a +12V high at the STATUS output. Works with
components that provide a continuous voltage output to
represent a power ON or other condition.
NOTE: DC voltages must be connected with polarity as
shown. AC doesn't matter.
Fig. 4
GAM1
Audio Sensor
Module
GAM1
5. IR OUT. 3.5mm mono mini jack delivers the gated IR
command signals to the controlled component (via an IR
emitter, direct IR input jack, etc.).
GAM1 1-1/8" (29mm) W x 5-9/16" (141mm) H x 2-1/8" (54mm) D
L
2
1. Mounting Screws.
3
2. AUDIO IN RCA type jacks. Circuit senses line level audio.
Input impedance is 47k Ohms. ON condition is triggered
when audio levels exceed 10 mV. One minute delay ensures
ON condition during low level musical passages. Works
when line level audio represents a power ON or other condition.
R
AUDIO
L
OUT
+
2
–
5V to 30V AC or DC
VOLTAGE
SENSOR
4. ON LED. Lights when the ON condition is sensed.
1
IN
1
GEM1
R
STATUS
STATUS
3
ON
4
IR OUT
5
1
Fig. 5
4
3. AUDIO OUT RCA type jacks. Direct audio loop-through from AUDIO IN jacks.
5
4. STATUS. 3.5mm mono mini jack delivers a constant + 12 VDC output (9V @ 30
mA) when a component's line level audio is sensed.
ON
IR OUT
6
1
Fig. 6
GATEKEEP-IR
5. ON LED. Lights when the ON condition is sensed.
6. IR OUT. 3.5mm mono mini jack delivers the gated IR command signals to the
controlled component (via an IR emitter, direct IR input jack, etc.).
CAUTION: Be sure power is OFF when plugging modules into or unplugging
them from the ribbon cable connectors.
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Remote Control Switchers
3. STATUS. 3.5mm mono mini jack delivers a constant + 12
VDC output (9V @ 30 mA) when a component's ON condition
is sensed.
GEM1
Voltage Sensor
Module
GATEKEEP-IR MODULE DESCRIPTIONS (continued)
GVM1 1-1/8" (29mm) W x 5-9/16" (141mm) H x 2-1/8" (54mm) D
1. Mounting Screws.
GVM1
Video Sensor
Module
2. VIDEO IN. RCA type jack. Circuit senses NTSC sync at baseband video. Hi-Z
input provides loss-less loop-thru to VIDEO OUT jack. Circuit is triggered when
NTSC sync represents a power ON or other condition.
1
3. VIDEO OUT. RCA type jack. Allows direct video loop-thru to monitor, etc. Use
if a 2nd video output jack is not available on the Video source.
2
4. STATUS. 3.5mm mono mini jack delivers a constant +12 VDC output (9V @ 30
mA) when a component's NTSC sync signal is sensed.
GVM1
VIDEO IN
3
VIDEO OUT
5. ON LED. Lights when ON condition is sensed.
GTM1
Temperature
6. IR OUT. 3.5mm mono mini jack delivers the gated IR
command signals to the controlled component (via an IR Sensor Module
emitter, direct IR input jack, etc.).
1
GTM1 1-1/8" (29mm) W x 5-9/16" (141mm) H x 2-1/8" (54mm) D
STATUS
4
ON
5
IR OUT
6
1
Fig. 7
2
1. Mounting Screws.
2. TEMPERATURE SENSOR. 3.5mm stereo mini input jack
receives temperature dependent signal from a tiny solid state
thermal probe. Circuit is triggered ON when temperature from
a heat sink, component surface, ambient temperature, etc.
represents a need for a power ON/OFF or other condition.
3. THRESHOLD. Allows adjustment of the thermal sensing
threshold [approx. 50° F (10° C) to 100° F (38° C)] to be within
the ON/OFF temperature range of the heat source sampled.
4. Sensor Polarity Switch. Internal switch, when set to "+",
causes STATUS ON to occur with increasing temperature.
When set to "–", STATUS ON occurs with decreasing temperature.
GLM1
Light Sensor
Module
1
GLM1
2
LIGHT
SENSOR
GTM1
5. STATUS. 3.5mm mono mini jack delivers a constant +12
VDC output (9V @ 30 mA) when the sensed temperature
change exceeds the threshold level (ON condition).
TEMPERATURE
SENSOR
3
–
4
THRESHOLD
+
STATUS
5
ON
6
IR OUT
7
1
Fig. 8
6. ON LED. Lights when the ON condition is sensed.
7. IR OUT. 3.5mm mono mini jack delivers the gated IR command signals to the
controlled component (via an IR emitter, direct IR input jack, etc.).
3
GLM1 1-1/8" (29mm) W x 5-9/16" (141mm) H x 2-1/8" (54mm) D
1. Mounting Screws.
THRESHOLD
STATUS
4
2. LIGHT SENSOR. 3.5mm mono mini input jack receives a light dependent signal
from a tiny solid state Light Sensor device (included). Circuit is triggered ON when
light from an LED, small bulb, daylight, etc., represents a power ON/OFF or other
condition.
ON
5
4. STATUS. 3.5mm mono mini jack delivers a constant +12 VDC output (9V @ 30
mA) when the sensed light intensity exceeds the threshold level (ON condition).
6
5. ON LED. Lights when the ON condition is sensed.
1
6. IR OUT. 3.5mm mono mini jack sends the gated IR command signals to the
controlled component (via an IR emitter, direct IR input jack, etc.).
IR OUT
Fig. 9
4

GATEKEEP-IR
CAUTION: Be sure power is OFF when plugging modules into or unplugging them from the ribbon
cable connectors.
RC68 GATEKEEP-IR COMMANDS
The RC68 Programmer (available separately) contains all the commands necessary to operate the
Gatekeep-IR.
• You will need the RC68 to program universal learning devices such as the Xantech URC-1 learning
remote, the Xantech Smart Pads, the 590 Programmable Controller, etc., with the commands that operate
the Gatekeep-IR.
CAUTION: While the RC68 can be used directly as a handheld remote control, it is highly recommended
it not be given to the final user for the following reasons:
• Since it includes the ability to change IR code groups, the user may inadvertently alter the installer
configurations.
• Also, since the user will require IR commands from other brands of equipment to control the total system,
in addition to those of the Gatekeep-IR, all commands should be consolidated into one learning device,
for ease of use.
APPLICABLE RC68 BUTTON DESCRIPTIONS (With the "E" Overlay. Refer to Fig. 10)
1. Gate Sensor Slot Numbers (1 through 8).
These numbers refer to the row of four commands that operate a sensor plugged into the like
numbered slot on the GMB9 Module Mounting Bracket. Refer to Fig. 2. For example, row #3 on the
RC68 operates the gate commands for the Sensor Module plugged into Slot #3 on the GMB9.
2. Gatekeep-IR Commands
The ON command permits an IR command to pass to the IR OUT when there is no sensed ON
condition (STATUS OFF). This permits a power command to pass to the controlled component,
turning it on, causing the STATUS to go ON. Once STATUS is ON (and the gate is CLOSED), a second
pass of the ON command is stopped by the gate thus preventing a second power command from
causing an "out-of-sync" power condition of the controlled component.
The OFF command permits an IR command
to pass to the IR OUT when there is a sensed
ON condition (STATUS ON). This permits a
power command to pass to the controlled
component, turning if OFF, causing the STATUS to go OFF. Once STATUS is OFF (and
the gate is CLOSED), a second OFF command is blocked by the gate, thus preventing
a second power command from causing an
"out-of-sync" power condition.
The OPEN command opens the gate and
permits an IR command to pass to the IR OUT
regardless of the sensed STATUS condition.
This permits function commands, such as
Play, Stop, etc., to pass to the controlled
component, when needed.
Gate Sensor
Slot Numbers
(1 through 8)
Place the
"E" Overlay
on the RC68
1
2
B
C
48
01
90
ON
1
OFF
2
OPEN
3
CLOSE
4
00
ON
5
3
Gatekeep-IR
Commands
(8 rows-one
for each
sensor)
40
ON
4
5
8
The CLOSE command closes the gate and
50
D0
CLOSE
8
A0
30
B0
OFF
OPEN
GLOBAL
CLOSE
20
E0
70
F0
OFF
BASS
OPEN
Z-ADJ
CLOSE
VOLUME
60
88
18
OFF
OPEN
08
ON
7
C0
INPUTOPEN
OFF
6
7
ON
TREBLE
ON
6
ADJ-OFFE
A
10
98
CLOSE
MUTE
A8
38
B8
OFF
ON
OPEN
OFF
CLOSE
28
E8
78
F8
ON
E-FLAT
OFF
LAST
OPEN
MAX-V
CLOSE
TRIM
68
C8
58
D8
ON
OFF
OFF
BALANCE
OPEN
CLOSE
RC68 PROGRAMMER
Gate Group
Commands
(row 1 issues
commands to
all gates as a
group with FD
code setting.
See text)
Code Group
Numbers
(on face of each
button)
Fig. 10 RC68 Programmer
GATEKEEP-IR

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Remote Control Switchers
Each row of these buttons contain the four gate commands (ON, OFF, OPEN, CLOSE) that are
required for operation of the Gatekeep-IR system.
stops IR commands from passing to the IR OUT regardless of the sensed STATUS condition. This
inhibits all commands from passing through the gate until an OPEN command is received (or an ON or
OFF command, depending on STATUS condition).
3. Gate Group Commands
This row of buttons, row #1, issues Gate commands to all Sensor Gates simultaneously as a Group.
This occurs only when the Code Switches on the back of the RC68 are set to FD.
The Gate Group commands permit short command sequences for functions such as total system
power ON/OFF, multiple VCR record, pause, stop, etc.
4. Code Group Numbers
The Gatekeep-IR is capable of being set to 30 different IR code groups. The code groups are identified
by the numbers and letters that are on the face of each button.
NOTE: When shipped from the factory, the Gatekeep-IR modules are set to code group number C8.
Be sure to set the RC68 to the same number!
It should not be necessary to change to a different code group unless you are using more than one
Gatekeep-IR in a common IR bus controlled system. In such cases, each Gatekeep-IR would need
to be set to a different code group to avoid mutual interaction.
Refer to the RC68 instructions for code group setting details and procedures!
GATEKEEP-IR COMMAND EXAMPLES
Now that the basic commands have been described, a few examples should serve to illustrate how to place
them in sequences (macros) for a typical sequence capable learning IR remote or keypad.
Suppose you wish to have positive AC power management of two identical VCR's and correctly route the
IR control signals to each. The VCR's are numbered VCR #1 and VCR #2, controlled by Gate #1 (Slot 1)
and Gate #2 (Slot 2) respectively. We could write the command sequences in simple logical algebraic
expressions as follows:
Example #1
VCR #1 Power ON = Gate #1 ON + VCR Power + Gate #1 CLOSE.
In this example, power is turned on to just VCR #1 by first issuing the Gate #1 ON command, then the
VCR Power command, ending with a Gate #1 CLOSE command. The CLOSE command is added at
the end of a command sequence when components share the same IR commands. This permits
individual control of the controlled component's operational functions.
Example #2
VCR #2 Power ON = Gate #2 ON + VCR Power + Gate #2 CLOSE.
Example #2 is identical to the first, except Gate #2 commands are issued to ensure that the VCR Power
command is routed to just VCR #2.
Example #3
Now that power is ON for both VCR's, we need to create sequences for operational functions, such as
Play, Pause, Record, etc.
VCR #1 Play = Gate #1 OPEN + VCR Play + Gate #1 CLOSE.
VCR #2 Play = Gate #2 OPEN + VCR Play + Gate #2 CLOSE.
Repeat this process for any function you desire. Just remember to always place the Gate OPEN
command first in the sequence, followed by the desired command for the component, then ending with
the Gate CLOSE command.
6

GATEKEEP-IR
Example #4
Individual Power OFF commands can also be structured for each VCR, if desired, as follows:
VCR #1 Power OFF =
Gate #1 OFF + VCR Power + Gate #1 CLOSE.
VCR #2 Power OFF =
Gate #2 OFF + VCR Power + Gate #2 CLOSE.
You will note these sequences are similar to examples #1 and #2, except the Gate OFF commands are
used instead of Gate ON. Remember, it is the Gate ON and OFF commands (each followed by Gate
CLOSE for units with shared commands), along with the sensed signal to the gates (e.g., current
sensing) that keeps power switching precisely in sync.
Example #5
To execute commands to both VCR's at the same time (or to many same brand VCR's in a large system),
you may do so by using the Gate Group commands. Refer to Fig. 10. The following are typical group
commands:
All VCR's Power OFF = Gate Group OFF + VCR Power + Gate Group CLOSE.
All VCR's Power ON = Gate Group ON + VCR Power + Gate Group CLOSE.
All VCR's Record = Gate Group OPEN + VCR Record + Gate Group CLOSE.
Using the above command techniques, systems of practically any level of complexity may be controlled.
Refer to Fig. 11 for a typical system.
INSTALLATION
To show how the GATEKEEP-IR system works and how to implement the command sequences for proper
operation, it may, perhaps, be best illustrated with a simple A/V system. Before starting, one needs to
carefully define the A/V system desired by the client, based on the following information.
• Suppose it is a single zone installation consisting of an A/V receiver, a CD changer and two VCR's of
identical brand.
• It is to be controlled with a Smart Pad2 only.
• Source button commands must turn the A/V receiver ON and switch to the selected source.
• The identical VCR's must be capable of being turned on and operated separately. In addition, their ON
and OFF power status must be kept in perfect sync with the desired power condition. In other words, we
must Route the IR commands separately to the desired VCR and also exercise precise Power
Management over them.
Here's where the GATEKEEP-IR comes in. Fig. 11 illustrates such a system.
1. Connecting the System
Connect each of the controlled components and the Gatekeep-IR as shown in Fig. 11.
a. Note that one 782-00 Power Supply powers both the Gatekeep-IR and the Smart Pad2 IR system.
This is done via the 2-conductor wire between +12V and G of the GMM1A and the 789-44.
b. Be sure that the power plugs of the VCR's are plugged into the Current Sensor adapters and the
adapters are plugged into unswitched 120 VAC outlets as shown. In this way, the ON/OFF
condition of the VCR's is sensed by the higher current they draw when they are powered ON.
c. When connected, make the threshold adjustments.
GATEKEEP-IR

7
Remote Control Switchers
A BASIC A/V SYSTEM USING THE GATEKEEP-IR
To Switched Outlets
on A/V Rec'r
781C-00
Smart Pad2™
AV Receiver
(Used for STATUS on Smart Pad2 Only)
283-00
Blink IR
789-44
CD Changer
Connecting Block
(–)
SIGNAL
(+)
(–)
To 120 V AC
(Unswitched)
VCR #1
EMITTERS
STATUS
IR
RCVR
®
SYLMAR, CA • MADE IN U.S.A.
GND
Blink IR
789-44
+12VDC
283-00
CONNECTING BLOCK
PWR
+12V
GND
STATUS
OUT
(+)
AC Cords
283-00
Current
SENSOR
Adapters
Blink IR
VCR #2
Current
SENSOR
GATE #1
(Slot 1)
GATE #2
(Slot 2)
GMM1A
GCM1
GCM1
IR IN
CURRENT
SENSOR
CURRENT
SENSOR
To 120 V AC
(Unswitched)
Current
SENSOR
To 120 V AC
(Unswitched)
283-00
Blink IR
GS1 SLOT COVERS (six)
(Slots 3 through 8)
IR OUT
CONFIRM
THRESHOLD
THRESHOLD
STATUS
STATUS
ON
ON
IR OUT
IR OUT
POWER
(+)
+12V
(–)
G
CI
S
12VDC

782-00
To 120 V AC (Unswitched)
Power Supply
MAIN ROOM, EQUIPMENT CABINET, ETC.
Fig. 11
A Basic System Using Gatekeep-IR
2. Gate Sensor Threshold Adjustments
The THRESHOLD control of each gate sensor (so equipped) must be set correctly so that the ON/OFF
condition of the controlled component is positively sensed. Make sure all components and sensors
are connected correctly, then adjust each one as follows:
a. Manually turn the component ON first.
b. Using a small (1/8" wide) blade screwdriver, rotate the
threshold control of the associated sensor to a full
counterclockwise (CCW) position.
c. Now rotate the control clockwise (CW) until the ON LED
just goes OFF. Refer to Fig. 12.
ON Threshold
(step 3 below)
Correct Setting
(Midway between
ON & OFF)
THRESHOLD
OFF Threshold
(step 5 below)
d. Turn the component OFF manually.
Fig. 12 Adjusting Threshold Control
8

GATEKEEP-IR
e. Rotate the control CCW until the ON LED just goes ON. Refer to Fig. 12.
f. Now set the control to a point midway between these two settings. This is the correct setting.
Notes:
1) If the ON LED does not go OFF in step 3, even at full CW rotation, simply back the control off
a few degrees. This will be the correct setting.
2) If the ON LED does not go ON in step 5, even at full CCW rotation, simply back the control off
a few degrees from the point found in step 3. This will be the correct setting.
3) The above settings are pretty much instantaneous for the Current (GCM1) and Light (GLM1)
Sensors. However, for the Temperature Sensor Module (GTM1) you may have to wait a
considerable length of time for temperatures to stabilize in order to make accurate adjustments
in steps 3 and 5.
3. Configuring the SmartPad2
The next step is to layout a Smart Pad2 to match
the required commands for the equipment. Since
there are four sources in Fig. 11, we can configure a four source version of the Smart Pad2 for
this system. The keypad could look like that in
Fig. 13.
PM1
PRGM
CNCL
FULL
CLR MEM
TUNER
RESTORE
CD
NETWORK
SEQ
KM1
VCR 1
VCR 2
KM4
DELAY
4. Command Sequences (Macros)
AM/FM
EDIT
STEP
From the previous information, we can now define the commands and the command sequences
(macros) necessary to program the Smart Pad2,
as shown in the following steps. Once defined,
they can then be programmed into the Smart
Pad2, preferably by the use of Dragon Drop-IR™.
TRNS
DEL
RANDOM
REPEAT
XFER
TNR
VOL
TNR
VOL
MUTE
OFF
ERR
IR
DISC
–
DISC
+
COM PORT
1) TUNER - Turns A/V receiver power ON
and sets source to Tuner.
Fig. 13 Smart Pad2 Configured for System in Fig. 11
Command Sequence:
TUNER = A/V Rec'r Power + Tuner (source).
2) CD - Turns A/V receiver power ON and sets the source to CD.
Command Sequence:
CD = A/V Rec'r Power + CD (source).
NOTE: Since the above two sources do not share common IR commands, it is not necessary
to use Gatekeep-IR with them. Power management is accomplished through the switched AC
outlets on the back of the A/V receiver and the STATUS feature of the Smart Pad2. (The manual
power switch of the CD player is left ON at all times).
3) VCR1 - Turns A/V receiver power ON, turns VCR1 power ON (through Gatekeep-IR, slot 1) and
sets source of the A/V receiver to VCR1 (through Gatekeep-IR slot 1).
Command Sequence:
VCR1 = A/V Rec'r Power + Gate 1 ON + VCR Power + VCR1 (source) + Gate 1 CLOSE.
Note: When a gate senses the ON current of a VCR, it stops a second Gate ON and VCR Power
command from passing through. This prevents an out-of-sync power condition when a VCR
source button is pressed again after initial power up.
GATEKEEP-IR

9
Remote Control Switchers
a. Source Commands
4) VCR2 - Turns A/V receiver power ON, turns VCR2 power ON (through Gatekeep-IR, slot 2) and
sets source of the A/V receiver to VCR2 (through Gatekeep-IR slot 2).
Command Sequence:
VCR2 = A/V Rec'r Power + Gate 2 ON + VCR Power + VCR2 (source) + Gate 2 CLOSE.
NOTE: Since the IR commands are shared by both VCR's, they must be routed to achieve
independent operation. This is accomplished by using the Gate 1 and 2 commands as prefixes
and suffixes to each VCR command as shown in the previous and following examples.
b) Function Commands
In this example, commands for operation of the Tuner/A/V receiver and the CD player do not require
Gate 1 or 2 prefixes or suffixes. Only function commands (i.e. play, pause, etc.) intended for the
two VCR's will require them, as shown below:
1) TUNER Source - Once this source bank has been selected, all functions operate with a single
stored command under the selected Smart Pad2 function button. (e.g. Tuner Up would use the
Preset Up Command from the A/V receiver remote, etc.).
2) CD Source - Again, once this source bank has been selected, all CD functions operate with a
single stored command under the selected button. (e.g. CD Play would use the Play Command
from the CD player remote, etc.).
3) VCR1 Source - All function commands, after the selection of this source bank, will require a
Gatekeep-IR prefix (OPEN) and suffix (CLOSE).
For example, the command sequence for VCR1 Play would be:
VCR1 Play = Gate 1 OPEN + VCR Play + Gate 1 CLOSE.
Again, the command sequence for VCR1 Stop would be:
VCR1 Stop = Gate 1 OPEN + VCR Stop + Gate 1 CLOSE.
4) VCR2 Source - The same sequence technique is used here, except Gate 2 commands are used
instead of Gate 1.
For example, the command sequence for VCR2 Play would be:
VCR2 Play = Gate 2 OPEN + VCR Play + Gate 2 CLOSE
You would then program the rest of the functions in like manner. Just keep in mind that each
function command desired from the VCR remote must be preceded by a Gate OPEN command
and followed by a Gate CLOSE command.
c) Common Commands
In this keypad example, there are several commands that are common to all four banks (VOL up,
VOL down, MUTE and OFF). You would use the same techniques to program these as shown in
the previous examples. In this case, these commands do not require the Gatekeep-IR prefix or
suffix codes, since they are A/V receiver commands. You do, however, need to teach them to the
assigned keys on each of the four banks.
d) Using Gate Group Commands
The OFF button is a system power OFF and needs a sequence of commands that include the power
command for each device that is to be shut down. For the system example in Fig. 11, this would
include the A/V receiver and each VCR.
We could, therefore, write the OFF sequence as follows:
OFF = A/V Rec'r Power + Gate1 OFF + VCR Power + Gate1 CLOSE + Gate2 OFF + VCR
Power + Gate2 CLOSE.
As you can see, this results in a rather lengthy sequence, even for this very basic system. If more
10

GATEKEEP-IR
same brand VCR's were used in a more complex system, you can see how common commands
of this type could become unwieldy.
For this reason Gate Group commands are provided so that the sequences can be much shorter,
as follows:
OFF = A/V Rec'r Power + Gate Group OFF + VCR Power + Gate Group CLOSE.
This sequence will do the job, whether there are two same brand VCR's or eight. The same applies
to function commands as well (e.g., Play, Stop, etc.).
To access the Gate Group Commands, you must first set the rotary switches on the rear of the
RC68 to FD. You would then teach the desired commands from the #1 row of the RC68 into the
keypad or other learning device when setting up group sequences.
CAUTION: Remember to always set the rotary switches on the rear of the RC68 back to C8 when
returning to individual gate commands!
See "RC68 GATEKEEP-IR COMMANDS" and Fig. 10 for Gate Group Command details.
USING GATEKEEP-IR ON EACH A/V COMPONENT
In the previous basic example, Fig. 11, power management was accomplished using both a Smart Pad2
and two Gatekeep-IR Sensor Modules. In the following example, Fig. 14, Gatekeep-IR implements power
management for all system components, including the A/V receiver, using four Gatekeep-IR Sensor
Modules. In this case, all components are different, therefore IR routing is not required to prevent
interaction. The system is configured as follows:
• Three GCM1 Current Sensor Modules are used, one each for the A/V receiver, the CD Changer and the
VCR.
• The GVM1 Video Sensor Module has been chosen for use with the SATellite Receiver.
NOTE: Some satellite receivers retain video sync output in their OFF state (such as the DISH model
1000). In these cases, you will need to use a different module, such as the GAM1 Audio Sensor or the
GLM1 Light Sensor.
• The Smart Pad2 is shown as the source of commands for the system in Fig. 14. However, since power
management is totally controlled by the Gatekeep-IR, other keypads not having power management
capability (such as the Xantech 730), Touch Panels, Universal Learning Remotes (such as the URC-1),
etc., could be used. Each must have sequencing (macro) capability, however.
• If you wish to control the system with Universal Learning Remotes, you will need to connect a Xantech
IR Receiver(s) of your choice. Simply wire the voltage, ground and signal leads of the IR receiver in parallel
with the keypad(s) at the +12V, G and S terminals on the GMM1A Module.
• A 781C-00 Power Supply is shown as a source of STATUS voltage for the keypad. This would not be
necessary if the system uses keypads or IR receivers not having STATUS capability.
• After the system is connected, you would adjust the sensor thresholds as outlined under "Gate Sensor
Threshold Adjustments."
1. Configuring a Smart Pad2
The next step is to layout a Smart Pad2 (or other macro capable IR controller) to match the required
commands for the equipment. Since there are four sources in Fig. 14, we can configure a four source
version of the Smart Pad2 that may look like that in Fig. 15.
GATEKEEP-IR

11
Remote Control Switchers
This choice was made because most satellite receivers do not have a sufficient difference between their
OFF and ON currents to allow use of a Current Sensor Module. In fact, some units draw slightly more
current in their OFF state than ON! However, they usually turn their video signal off in the OFF state.
To Switched Outlet
on A/V Rec'r
781C-00
(Used for STATUS on Smart Pad2 Only)
A/V Receiver
283-00
Blink IR
Current
SENSOR
Adapters
AC Cords
CD Changer
Current
SENSOR
Smart Pad2™
283-00
To 120 V AC
(Unswitched)
Blink IR
To Video OUT
on SAT Receiver
SAT. Receiver
Current
SENSOR
To 120 V AC
(Unswitched)
283-00
+12V
GND
STATUS
OUT
To 120 V AC
(Unswitched)
Blink IR
Video Patch Cable
(with RCA type plugs)
VCR
283-00
Blink IR
Current
SENSOR
GATE #1
(Slot 1)
GATE #2
(Slot 2)
GATE #3
(Slot 3)
GATE #4
(Slot 4)
To 120 V AC
(Unswitched)
GMM1A
GCM1
GCM1
GVM1
GCM1
IR IN
CURRENT
SENSOR
CURRENT
SENSOR
VIDEO IN
CURRENT
SENSOR
IR OUT
To a Video IN jack
on A/V Receiver
(If needed.
See GVM1A text)
VIDEO OUT
CONFIRM
THRESHOLD
THRESHOLD
THRESHOLD
GS1
SLOT COVERS
(four,
Slots 5 through 8)
POWER
STATUS
STATUS
STATUS
STATUS
ON
ON
ON
ON
IR OUT
IR OUT
IR OUT
IR OUT
+12V
G
(+)
CI
S
12VDC

782-00
To 120 V AC
(Unswitched)
Power Supply
MAIN ROOM, EQUIPMENT CABINET, ETC.
Fig. 14 Using GATEKEEP-IR on Each A/V Component
2. Command Sequences (Macros)
From the information given, we can now define the commands and the command sequences (macros)
necessary for programming this system, as shown in the following steps. Again, once defined, they
can be programmed into the Smart Pad2, preferably by using Dragon Drop-IR™.
3. Source Commands
a. TUNER - Turns A/V receiver power ON and sets A/V receiver source to Tuner (thru' GatekeepIR slot 1). Leaves Gate 1 open for subsequent A/V Receiver function commands.
12

GATEKEEP-IR
Command Sequence:
TUNER = Gate 1 ON + Gate 1 ON + A/V Rec'r
Power + Gate 1 OPEN + Tuner (source).
Note: Since none of the components share
the same IR commands, a Gate CLOSE command is not required as it was in the previous
example.
PM1
PRGM
CNCL
FULL
CLR MEM
TUNER
RESTORE
CD
NETWORK
CM1
SEQ
REPEAT
SAT
KM4
VCR
DELAY
AM/FM
EDIT
Also note that two Gate 1 ON commands are
used at the beginning of each of the Source
button sequences. In this system example, we
are using the Gatekeep-IR for all power management, rather than that of the Smart Pad2.
However, since Smart Pad2 STATUS is used,
it causes the first command in a Source button
sequence to be blocked after the system is f