Wheatstone TV-80, Technical Manual

Page: 69 / 120

S T U D I O M O N I T O R
page 6 – 3
TV80 / Sep 98
Monitor Select
These source select switches allow studio talent to monitor the
console’s eight aux sends, eight submasters and two master outputs.
Four additional external line inputs (brought in to the module’s rear
panel) may also be accessed.
Headphone Section
The studio module’s headphone circuit follows the monitor source
select switching. There are two headphone outputs: one electronically
balanced line level out (programmable as either pre or post HDPN level
control), and the other driven by a built-in amplifier (amplifier output
may be stereo or L+R summed). Note the headphone outputs are
normally subject to the console’s mute control circuits; however, this
may be defeated by a front panel switch if desired.
Studio Section
Studio output is determined by the module’s monitor source select
switching and is subject to the console’s muting and talkback interrupt
circuits (muting is front panel switch defeatable). A studio talkback
switch (TB) routes the console operator’s talkback microphone signal
(see “Talkback” on page 7-2 of the VO-80 Chapter) to the studio
output. There are two studio output ports; both are electronically
balanced line level: one is POST level control (variable), the other PRE
(fixed).
MODE Switch
The mode switch affects both STUDIO and HDPN outputs as
follows:
Left Mode (LT) – Left signal to both channels
Right Mode (RT) – Right signal to both channels
Mono Mode (MN) – Left plus right sum signal to both channels
Stereo (ST) — “Normal” mode (MODE switch illuminated).
Tally Ports
The SC-80 module includes a tally function. There are two ports:
relay closure and opto-isolated. Both are controlled by the console’s
mute/tally control lines (four; which one activates the studio tally port
is determined by a PCB-mounted dipswitch).
1 2
1 2
3 4
5 6
7 8
S
U
B
M
A
S
T
E
R
S
1 2
3 4
E
X
T
1 2
3 4
5 6
7 8
A
U
X
S
E
N
D
S
8
0
9
7
6
5
4
3
2
1
0 1
HDPN
8
0
9
7
6
5
4
3
2
1
0 1
STUDIO
M
O
D
E
L
T
R
T
S
T
TB
MONITOR
SELECT
M
N
MUTE
MUTE
D
E
F
E
A
T
D
E
F
E
A
T
SC
MASTERS
L
STUDIO
R
L
R
I
M
T
R
I
M
D
HDPN
L
STUDIO
R
V
U
T
R
I
M