CB ELECTRONICS A-Mon User manual

CB Electronics
A-Mon
Analogue Monitor Control Unit
User Guide
Preliminary

A-Mon Analogue Monitor Control Unit
Contents
INTRODUCTION 1
INSTALLATION 2
C ONNECTING THE TMC-1 TO A-M ON 2
GPIO CONNECTIONS 3
TMC-1 HD15 (VGA) CONNECTOR 4
SYSTEM SETUP 5
M ONITORING O PTIONS 5
OPERATION 6
TALKBACK 7
TMC-1 T ALKBACK M ICROPHONE 7
A-MON BLOCK DIAGRAM 7
M ONO M INI O UTPUT 9
A DDING P HANTOM POWER TO L ISTEN 1, L ISTEN 2 AND E XTERNAL T ALKBACK . 9
USB PORT 1
C ONFIGURATION 10
F IRMWARE U PDATES 10
R ECOVERY M ODE 10
CB XPAND 11
XPand External connections 11
TMC-1 XPand Surround Format Selector 12
5,1/7.1/7.1. 12
5.1/7.1/9.1.2 13
7.1 TO 5.1 S WITCHING 13
S URROUND B ASS E XTENSION 13
C ONNECTING THE TMC-1 TO A-M ON AND XP AND 13
C ONNECTING THE TMC-1 TO XM ON AND XP AND 14
U SING EXISTING A VID C ABLE 14
NPUT C ONNECTIONS (25 PIN ‘D’) 14
O UTPUT C ONNECTIONS (25 PIN ‘D’) 15
NTERNAL L INKS 15
GLOSSARY 17
SPECIFICATION 18

A-Mon Analogue Monitor Control Unit
Inputs: 18
Outputs: 18

A-Mon Analogue Monitor Control Unit
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The A-Mon analogue monitor control unit is housed in a 1U rack mount box. Designed for
stereo, 5.1 and 7.1 this ersatile unit corrects some of the problems of the X-Mon and is
a ailable as a stand alone unit.
•6 Inputs: 1 x 7.1/5.1, 1 x 5.1 and 4 x Stereo,
•Input Summing
•3 outputs: 1 x7.1/5.1, 1x5.1 and 1xStereo
•3 x Stereo Cue inputs
•4 x Stereo Cue Outputs: Studio L/S, Headphones and cue 1, cue 2
•2 x Talkback Mic I/P, 2 x Listen Mic I/P
•Stereo I/P 3 & 4 may be routed to Studio L/S
•Metering selected input(s) or Left, Right, Center, Studio L/S and Headphone
•Rear surround switching for 5.1 or 7.1

A-Mon – Analogue Monitor Control Unit
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The A-Mon is a 1U rack mounting, care should be taken that it is not mounted in a position
where it will o erheat.
Connecting the TMC-1 to A-Mon
Connect the TMC-1 to A-Mon using a DDC VGA Cable, a 7.5 meter cable is supplied with
the system. Where ery long cables are used (>15m) we recommend using a separate
Talkback Microphone cable to pre ent cross talk between the Mic input and the digital
signals resulting in noise on the Talkback feed.
A-Mon
TMC-1 Long DCC VGA Cable
All input and output connections to the A-Mon are made ia 25 way ‘D’ connectors wired
to the Tascam standard. All inputs and outputs are electronically balanced.
A-Mon Audio Input/Output Connections
Input Connections (25 ‘D’)
C annel
No. (+) (-) Gnd
Stereo
I/P’s 1-4
Aux I/P, Cue I/P 3
7.1 or 5.1 + Cue 3
Main I/P
7.1 I/P
T/B L/B
Cue I/P 1 & 2
1 24 12 25 1 Left 5.1 Left Left Int. T/B (TMC-1)
2 10 23 11 1 Right 5.1 Right Right Ext. Talk/Back
3 21 9 22 2 Left 5.1 Center Center Listen/Back 1
4 7 20 8 2 Right 5.1 LFE LFE Listen/Back 2
5 18 6 19 3 Left 5.1 L.side L.side Cue 1 Left
6 4 17 5 3 Right 5.1 R.side R.side Cue 1 Right
7 15 3 16 4 Left L.back or Cue 3 L L.back Cue 2 Left
8 1 14 2 4 Right R.back or Cue 3 R R.back Cue 2 Right
Gnd 13
Note. Aux I/P may be configured as 7.1 to special order, Cue I/P 3 is then disabled.

A-Mon – Analogue Monitor Control Unit
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Output Connections (25 ‘D’)
C annel (+) (-) Gnd Cue O/Ps Alt/Mini O/P Main O/P GPIO AFL DMix
1 24 12 25 Cue 1 Left 5.1 Left Left AFL Left I/P
2 10 23 11 Cue 1 Right 5.1 Right Right AFL Right I/P
3 21 9 22 Cue 2 Left 5.1 Center Center DMix Left O/P
4 7 20 8 Cue 2 Right 5.1 LFE LFE DMix Right O/P
5 18 6 19 SLS Left 5.1 L.side L.side T/B O/P(Slate)
6 4 17 5 SLS Right 5.1 R.side R.side See GPIO
7 15 3 16 H/P Left Mini Left L.back See GPIO
8 1 14 2 H/P Right Mini Right R.back See GPIO
Gnd 13
DMix Left = L+C(-3dB)+Ls(-3dB)+Lb(-5dB), DMix Right = R+C(-3dB)+Rs(-3dB)+Rb(-5dB),
SLS = Studio Loudspeakers, H/P = Headphones
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GP PI IO O C Co on nn ne ec ct ti io on ns s
GPIO Connections (25 ‘D’)
Pin Type Function
5 GPO 6
17 GPI/GPO 5
4 GPI/GPO 4
16 GPI/GPO 3
3 GPI/GPO 2
15 GPI/GPO 1
2 GPI/GPO 0
14 GPI 6
1 GPI 7
13 Ground
To Be updated

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TM MC C- -1 1 H HD D1 15 5 ( (V VG GA A) ) C Co on nn ne ec ct to or r
Pin No. In/Out (TMC-1) Function Note
1 Output TMC-1 T/B Mic +
Unbalanced
Ground
TMC-1 T/B Mic Gnd Default Jumper J13 between pins 1
and 2
6
Balanced
Output
TMC-1 T/B Mic - Option Jumper J13 between pins 2
and 3 – Use Pin 7 for Screen
11 Input Midi Rx-
2 Input H/P Right I/P
7 Ground H/P Right Gnd
12 Input Midi Rx+
3 Input H/P left I/P
8 Ground H/P left Gnd
13 Input RS422 Rx+
4 Output Midi Tx-
9
14 Output RS422 Tx+
5 Input RS422 Rx-
10 Output RS422 Tx-
15 Output Midi Tx+
Midi o er RS422 or MIDI Optical
See RS422/MIDI select in TMC-1
menu.
XMon uses RS422 by default, Midi is
used for software updates
A-Mon uses RS422 only
XPand uses RS422 only

A-Mon – Analogue Monitor Control Unit
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Monitoring Options
The A-Mon pro ides three options
that may only be enabled/
disabled using TMC-1-win or TMC-
1-mac ia the USB port. By Default
all three options are OFF.
No LFE: When checked the LFE
channel is sent to Left and Right
No Center: When checked the
Center channel is send to Left and
Right
No Rear Speakers: When enabled
the Lb and Rb signals are added
to the Ls and Rs.

A-Mon – Analogue Monitor Control Unit
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The A-Mon powers up with hardware mutes acti ated, depressing the Mute key on the
TMC-1 or the Mute key on the A-Mon will disable the Hardware mutes, to enable the
Hardware mutes use Ctrl-Mute on the TMC-1 or the Mute key on the A-Mon.
The three LED’s on the front of the A-Mon indicate the following
•Power: On when connected to power
•Mute: On when Hardware Mute is acti ated and ALL inputs and outputs are
muted.
•Comms: Indicates communications recei ed from TMC-1. When key is
depressed or the knob is turned the LED will flash as the commands are
recei ed, otherwise the LED will flash about once a second.
•Mute Switch: Enable/Disable Hardware Mute, the Mute and Un-mute command
from the TMC-1 remote will also disable the Hardware Mute.
Read the TMC-1 manual for information on controlling the A-Mon.
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The A-Mon Stereo Down Mix feature is used to monitor 7.1 and 5.1 on a Stereo system or to
check how a 5.1 or 7.1 mix will sound in stereo. The A-Mon design allows for ariable ratios
but they are currently fixed as follows:
Left Centre Left Surround Left Rear
Ratio 0.69 0.47 0.47 0.39
Left Out
dB -3.2 -6.56 -6.56 -8.14
Right Centre Right Surround Right Rear
Ratio 0.69 0.47 0.47 0.39
Right Out
dB -3.2 -6.56 -6.56 -8.14

A-Mon – Analogue Monitor Control Unit
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The A-Mon has two talkback inputs; by default the internal talkback input is connected to
the TMC-1 talkback microphone ia the HD15 remote connector. The two inputs ha e
indi idual gain settings that can be adjusted from TMC-1.
The Talkback is enabled by the TMC-1 user keys [T/B 1] and [T/B 2] (internal) and [T/B 1x]
and [T/B 2x] (external) which enable talkback microphones. GP Inputs may also be
assigned ia the menu to enable the internal and external talkback. The two Talkback GP
Outputs may be used to dri e relays that switch the talkback output destination. T/B 1 and
T/B 2 are routed to the 4 cue sends using the TMC-1 cue send enable matrix.
T/B
Ext.
SLS
H/P
GAIN
CUE 2
T/B 2
T/B
Int
Ext
Int.
Disconnect to
use 25 'D'
CUE 1
25 'D'
GAIN
15 'D'
T/B 1
A-Mon Talkback Block System
TMC-1 Talkback Microphone
Both talkback inputs are also connected to the rear panel 25 pin ‘D’ connector, if you want
to replace the TMC-1 microphone with a different microphone connected ia the rear
panel 25 ‘D’ connector you must disconnect the connection to the HD15 connector by
unplugging the 10 way ribbon cable to the talkback input card. Alternati ely if you are not
using the External microphone input as the producers talkback input you could use the
External talkback input.
A
A- -M Mo on n B Bl lo oc ck k D Di ia ag gr ra am m
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