JK Audio RemoteMix 3x4 User manual

RemoteMix 3x4
Multi-Line Telephone Hybrid / Mixer
Users Guide
JK Audio Inc.

IFB From 4 Locations
Radio Remote Broadcast
Remote Call-in Talk Show
2 3
RemoteMix 3x4
Five Sections
RemoteMix 3x4 is a professional audio mixer designed to
handle Television IFB feeds and Radio remote broadcasts.
The combination of inputs, outputs, and controls make even
themostcomplicatedremoteasimplesuccess. Itworkswith
any standard analog telephone line. It can also connect to
many cellular telephones using a fax/modem adapter
availablefromyourcellulartelephonemanufacturer.
Your RemoteMix 3x4 has been broken down into five
sections. Both on the actual tool and here in the user guide
foreasyuse.
MeterSection
The VU meter is switchable between monitoring: Mic mixer,
Signal to main phone line, From main phone line, and From
monitor Line. Battery level can be monitored by simply
pressingthebatterytestbuttonatanytime,withtheunitonor
off,ACorbatterypowered. Thissectionalsofeaturesatone
generator. When this is turned on a 1 kHz signal replaces
Mic3. Mic3volumecontroladjuststhelevelofthetesttone.
MixerSection
RemoteMix 3x4 features three Mic/Line inputs. Each has a
selector switch on the side panel that lowers the gain on the
Mic XLR jack by 30 dB to allow a balanced line level input.
Each has a separate volume control located on the front panel.
There are two other controls in this section to make a total of
five. Mix to Main phone line controls the volume of the mix
being sent to the main phone line. Mixer output controls the
volume of the mix being sent to the XLR mixer output jack.
New York D.C.
Chicago
L.A.
Talent
IFB
Talent Station
IFB Feeds
Callers Talent Producer
Phone line
to Studio

IFB From 4 Locations
Radio Remote Broadcast
Remote Call-in Talk Show
2 3
RemoteMix 3x4
Five Sections
RemoteMix 3x4 is a professional audio mixer designed to
handle Television IFB feeds and Radio remote broadcasts.
The combination of inputs, outputs, and controls make even
themostcomplicatedremoteasimplesuccess. Itworkswith
any standard analog telephone line. It can also connect to
many cellular telephones using a fax/modem adapter
availablefromyourcellulartelephonemanufacturer.
Your RemoteMix 3x4 has been broken down into five
sections. Both on the actual tool and here in the user guide
foreasyuse.
MeterSection
The VU meter is switchable between monitoring: Mic mixer,
Signal to main phone line, From main phone line, and From
monitor Line. Battery level can be monitored by simply
pressingthebatterytestbuttonatanytime,withtheunitonor
off,ACorbatterypowered. Thissectionalsofeaturesatone
generator. When this is turned on a 1 kHz signal replaces
Mic3. Mic3volumecontroladjuststhelevelofthetesttone.
MixerSection
RemoteMix 3x4 features three Mic/Line inputs. Each has a
selector switch on the side panel that lowers the gain on the
Mic XLR jack by 30 dB to allow a balanced line level input.
Each has a separate volume control located on the front panel.
There are two other controls in this section to make a total of
five. Mix to Main phone line controls the volume of the mix
being sent to the main phone line. Mixer output controls the
volume of the mix being sent to the XLR mixer output jack.
New York D.C.
Chicago
L.A.
Talent
IFB
Talent Station
IFB Feeds
Callers Talent Producer
Phone line
to Studio

4 5
Five Sections (continued)
HeadphoneSection
Three separate headphone amplifiers are strong enough to
power a pair of headphones or a small desktop speaker.
Eachhasindependentsourceandvolumecontrols. Youcan
choose between Mix, Main phone line, and Monitor phone
line. These jacks will drive either a 1/4" stereo plug or a 1/4"
monoplug. Thereisa1/4”jackonthesideoftheRemoteMIx
3x4 labeled Headphone cue that will allow you to mix in new
audio to all of the headphones, not disturbing what each has
selected.
MainPhoneLineSection
Thisswitchallowsyoutoselectbetweenthefourphonelines
astowhichoneyouwanttosendandlistento. Levelcontrols
thevolumeoftheXLRoutputlabeledMainPhoneoutput.
MonitorSection
This section was created to allow for someone controlling
setup procedures. They have access to any of the four phone
lines through a telephone handset, a headphone jack, or an
XLR output jack. Rotary selector switch selects between four
telephone lines. “Add” button seizes the selected telephone
line. “Drop” button releases the selected telephone line.
DTMF keypad for dialing on the selected line. Level control
adjusts output level from a selected line on a male XLR jack.
Line LEDs lit when line is seized, flickers when ringing.
Five Sections (Continued)
MonitorSection(continued)
The DTMF telephone keypad is for tone dialing only, not
pulse dialing. You may use the keypad at anytime during a
callbutkeepinmindthatbothtransmitandreceiveaudioare
mutedduringakeypress.
RemoteMix 3x4 contains four analog hybrids. These hybrids
provide excellent sound quality at telephone bandwidth (180
Hz - 3600 Hz). These are, however, simple hybrid circuits
which provide only a minimum return cancellation. Any audio
that you send down the phone line, from RemoteMix 3x4, will
come back mixed with the signals from the other end of the
call. The Main Phone Line output XLR jack contains a mix of
both sides of a call.

4 5
Five Sections (continued)
HeadphoneSection
Three separate headphone amplifiers are strong enough to
power a pair of headphones or a small desktop speaker.
Eachhasindependentsourceandvolumecontrols. Youcan
choose between Mix, Main phone line, and Monitor phone
line. These jacks will drive either a 1/4" stereo plug or a 1/4"
monoplug. Thereisa1/4”jackonthesideoftheRemoteMIx
3x4 labeled Headphone cue that will allow you to mix in new
audio to all of the headphones, not disturbing what each has
selected.
MainPhoneLineSection
Thisswitchallowsyoutoselectbetweenthefourphonelines
astowhichoneyouwanttosendandlistento. Levelcontrols
thevolumeoftheXLRoutputlabeledMainPhoneoutput.
MonitorSection
This section was created to allow for someone controlling
setup procedures. They have access to any of the four phone
lines through a telephone handset, a headphone jack, or an
XLR output jack. Rotary selector switch selects between four
telephone lines. “Add” button seizes the selected telephone
line. “Drop” button releases the selected telephone line.
DTMF keypad for dialing on the selected line. Level control
adjusts output level from a selected line on a male XLR jack.
Line LEDs lit when line is seized, flickers when ringing.
Five Sections (Continued)
MonitorSection(continued)
The DTMF telephone keypad is for tone dialing only, not
pulse dialing. You may use the keypad at anytime during a
callbutkeepinmindthatbothtransmitandreceiveaudioare
mutedduringakeypress.
RemoteMix 3x4 contains four analog hybrids. These hybrids
provide excellent sound quality at telephone bandwidth (180
Hz - 3600 Hz). These are, however, simple hybrid circuits
which provide only a minimum return cancellation. Any audio
that you send down the phone line, from RemoteMix 3x4, will
come back mixed with the signals from the other end of the
call. The Main Phone Line output XLR jack contains a mix of
both sides of a call.

6 7
Power
RemoteMix 3x4 is powered by two 9-volt alkaline batteries
located under the cover on the bottom of the unit. Under
normal use, you should get at least 12 hours of continuous
usefromafreshsetofbatteries.
To test the batteries, simply press the Battery Test button at
anytime. ThebatteriesaregoodiftheVUmeterisinthered.
As soon as the meter drops to the black area, the batteries
willbegintoloosepowerquickly.
Thebatteriesarewiredinparallelsoitisimportanttoreplace
both at the same time with identical batteries. If two fresh
batteries are not available, it is better to run using only one
goodbattery. Thetwobatteryfixturesarewiredinparallelso
thatitdoesnotmatterwhichonegetsthesinglebattery.
We also provide a high quality, regulated AC to DC adapter
to power RemoteMix 3x4 when AC power is available.
Simply plug it into the back of RemoteMix 3x4 and plug the
transformer into a 110 VAC wall outlet. When the power
connector is inserted into the jack, the batteries are
bypassed. TheACadapterdoesnotchargethebatteries.
HybridNullAdjustment (optional)
The receive side of RemoteMix 3x4 has four hidden fine tuning
controls. One for each telephone line. This adjustment
controls the level of transmit audio that appears on the receive
audio jacks. The null circuit matches the characteristics of
RemoteMix 3x4 with the characteristics of the telephone line.
This adjust balances transmit and receive audio, it will not
remove the transmit audio from the balanced outputs. This is
not the equivalent of a mix-minus output.
Hybrid Null Adjustment (optional)
The amount of transmit/receive isolation will depend on the
qualityof thetelephoneline. Thiscircuit isfactoryset togive
a good mix on an average telephone line, and is therefore
perfectforrecordingbothsidesofatelephoneinterview.
To find the absolute null for any telephone line, follow this
procedure:
1. Placeacalltoaquietlocation.
2. Send the 1 kHz test tone signal down the line at
moderatelevels.
3. Connect the Main Phone line output to a meter or
scope, or listen to signal over the headphones. Be
sure to turn up the Main Phone Level or Headphone
volume control depending on which method you are
usingtomonitorthereceivesignal.
4. OnthebottomofRemoteMix3x4,therearefourholes
for a small flat blade screwdriver Try to remember the
position of the blade first adjust clockwise, and then
back to the original position, and then
counterclockwise.
The goal is to adjust the null signal until the receive
signal contains a minimum amount of transmit audio.
However, if you want a good mix of transmit and
receive signals, you must have someone on the far
end speak or send audio down the line as you adjust
fortheproperbalance.
ToResetNulltoFactorySetting:
Disconnect from phone line, switch the Phone Line switch to
On Hook, and the set the null to minimum. This presets the
null to an average phone line impedance.

6 7
Power
RemoteMix 3x4 is powered by two 9-volt alkaline batteries
located under the cover on the bottom of the unit. Under
normal use, you should get at least 12 hours of continuous
usefromafreshsetofbatteries.
To test the batteries, simply press the Battery Test button at
anytime. ThebatteriesaregoodiftheVUmeterisinthered.
As soon as the meter drops to the black area, the batteries
willbegintoloosepowerquickly.
Thebatteriesarewiredinparallelsoitisimportanttoreplace
both at the same time with identical batteries. If two fresh
batteries are not available, it is better to run using only one
goodbattery. Thetwobatteryfixturesarewiredinparallelso
thatitdoesnotmatterwhichonegetsthesinglebattery.
We also provide a high quality, regulated AC to DC adapter
to power RemoteMix 3x4 when AC power is available.
Simply plug it into the back of RemoteMix 3x4 and plug the
transformer into a 110 VAC wall outlet. When the power
connector is inserted into the jack, the batteries are
bypassed. TheACadapterdoesnotchargethebatteries.
HybridNullAdjustment (optional)
The receive side of RemoteMix 3x4 has four hidden fine tuning
controls. One for each telephone line. This adjustment
controls the level of transmit audio that appears on the receive
audio jacks. The null circuit matches the characteristics of
RemoteMix 3x4 with the characteristics of the telephone line.
This adjust balances transmit and receive audio, it will not
remove the transmit audio from the balanced outputs. This is
not the equivalent of a mix-minus output.
Hybrid Null Adjustment (optional)
The amount of transmit/receive isolation will depend on the
qualityof thetelephoneline. Thiscircuit isfactoryset togive
a good mix on an average telephone line, and is therefore
perfectforrecordingbothsidesofatelephoneinterview.
To find the absolute null for any telephone line, follow this
procedure:
1. Placeacalltoaquietlocation.
2. Send the 1 kHz test tone signal down the line at
moderatelevels.
3. Connect the Main Phone line output to a meter or
scope, or listen to signal over the headphones. Be
sure to turn up the Main Phone Level or Headphone
volume control depending on which method you are
usingtomonitorthereceivesignal.
4. OnthebottomofRemoteMix3x4,therearefourholes
for a small flat blade screwdriver Try to remember the
position of the blade first adjust clockwise, and then
back to the original position, and then
counterclockwise.
The goal is to adjust the null signal until the receive
signal contains a minimum amount of transmit audio.
However, if you want a good mix of transmit and
receive signals, you must have someone on the far
end speak or send audio down the line as you adjust
fortheproperbalance.
ToResetNulltoFactorySetting:
Disconnect from phone line, switch the Phone Line switch to
On Hook, and the set the null to minimum. This presets the
null to an average phone line impedance.

8 9
Specifications
Inputs:
Microphone: Connector(3) FemaleXLR
InputImpedance 1kohms
Mic/Line: Line=-30dBfrommicrophonegain.
Headphone Connector(3)1/4”monojack
CueInput: InputImpedance 10Kohms
Level 250mVRMS
Handset: Modular4pin/4wirehandsetjack
Electret/dynamicmicrophonebias.
Outputs:
Balanced: Connector(3) MaleXLR
OutputImpedance 200ohms
Level 500mVRMS
(+12dBmmax.)
Headphone: Connector(3) 1/4"stereojacks
OutputImpedance 8ohms
Power 1/2watt
PhoneLine: Connector(4) RJ11C
Isolation 1500volts
Ringer(REN)0.9
Keypad: DTMF(DualToneMulti-Frequency)
Power: two9voltAlkalineBatteries
AC Adapter Included
FCC Registration
Your new JK Audio product has been registered with the
Federal Communications Commission (FCC). This product
complieswiththestandardsinPart68oftheFCCrules.
1. Connection and use with the nationwide
telephonenetwork
The FCC requires that you connect this telephone
equipment to the national telephone network through
aUSOCRJ-11Cmodulartelephonejack.
This equipment may not be used with Party Line
ServiceorCoinTelephoneLines.
Thisequipmentishearingaidcompatible.
2. Informationforthetelephonecompany
Uponrequestfromyourlocaltelephonecompany,you
arerequiredtoprovidethefollowinginformation:
a) The "line" to which you will connect the telephone
equipment(thatis,yourtelephonenumber),and
b) The telephone equipment's FCC registration
number. This can be found on the bottom of your
telephoneequipment,and,
c) the ringer equivalence number (REN) for this
equipment. The REN is used to determine the quantity of
devices which will be connected to the telephone line.
Excessive RENs on the telephone line may result in the
devices not ringing in response to an incoming call. In most,
but not all areas, the sum of the RENs should not exceed
5.0. To be certain of the number of devices that may be
connected to the line, as determined by thetotal RENs, contact
the local telephone company.

8 9
Specifications
Inputs:
Microphone: Connector(3) FemaleXLR
InputImpedance 1kohms
Mic/Line: Line=-30dBfrommicrophonegain.
Headphone Connector(3)1/4”monojack
CueInput: InputImpedance 10Kohms
Level 250mVRMS
Handset: Modular4pin/4wirehandsetjack
Electret/dynamicmicrophonebias.
Outputs:
Balanced: Connector(3) MaleXLR
OutputImpedance 200ohms
Level 500mVRMS
(+12dBmmax.)
Headphone: Connector(3) 1/4"stereojacks
OutputImpedance 8ohms
Power 1/2watt
PhoneLine: Connector(4) RJ11C
Isolation 1500volts
Ringer(REN)0.9
Keypad: DTMF(DualToneMulti-Frequency)
Power: two9voltAlkalineBatteries
AC Adapter Included
FCC Registration
Your new JK Audio product has been registered with the
Federal Communications Commission (FCC). This product
complieswiththestandardsinPart68oftheFCCrules.
1. Connection and use with the nationwide
telephonenetwork
The FCC requires that you connect this telephone
equipment to the national telephone network through
aUSOCRJ-11Cmodulartelephonejack.
This equipment may not be used with Party Line
ServiceorCoinTelephoneLines.
Thisequipmentishearingaidcompatible.
2. Informationforthetelephonecompany
Uponrequestfromyourlocaltelephonecompany,you
arerequiredtoprovidethefollowinginformation:
a) The "line" to which you will connect the telephone
equipment(thatis,yourtelephonenumber),and
b) The telephone equipment's FCC registration
number. This can be found on the bottom of your
telephoneequipment,and,
c) the ringer equivalence number (REN) for this
equipment. The REN is used to determine the quantity of
devices which will be connected to the telephone line.
Excessive RENs on the telephone line may result in the
devices not ringing in response to an incoming call. In most,
but not all areas, the sum of the RENs should not exceed
5.0. To be certain of the number of devices that may be
connected to the line, as determined by thetotal RENs, contact
the local telephone company.

10 11
FCC Registration (continued)
3. RepairInstructions
If it is determined that your telephone equipment is
malfunctioning, the FCC requires that it not be used
and that it be unplugged from the modular outlet until
the problem has been corrected. Repairs to this
telephone equipment can only be made by the
manufacturer or its authorized agents or by others
who may be authorized by the FCC. For repair
procedures, follow the instructions outlined under the
warrantysectionofthemanual.
4. Rightsofthetelephonecompany
If telephone equipment is causing harm to the
network, the telephone company may temporarily
discontinueyourtelephoneservice. Ifpossible,they'll
notify you before they interrupt service. If advanced
notice isn't practical, you'll be notified as soon as
possible. You'll be given the opportunity to correct the
problem, and you'll be informed of your right to file a
complaintwiththeFCC.
Your telephone company may make changes in its
facilities, equipment, operations or procedures that could affect
the proper functioning of your JK Audio product. If such
changes are planned, you'll be notified by your telephone
company.
FCC Part 15 Compliance
This equipment has been tested and found to comply with
the limits for a Class A digital device, pursuant to Part 15 of
the FCC Rules. These limits are designed to provide
reasonableprotectionagainstharmfulinterferencewhenthe
equipment is operated in a commercial environment. This
equipmentgenerates,uses,andcanradiateradiofrequency
energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a
residential area is likely to cause harmful interference in
which case the user will be required to correct the
interferenceathisownexpense.
Changes or modifications not expressly approved by JK Audio
can void the user's authority to operate the equipment.