1. Functionality
1-1. Input Selection
Two stereo sources may be monitored simultaneously, one on the monitor A meters, and one on
the monitor B meters. The input source for each is selected using the Monitor Select and INPUT
pushbuttons. As an example, to monitor Analog input channel A, press the A pushbutton, then
select the Analog input source by pressing the INPUT pushbutton. When the INPUT pushbutton is
pressed, the input source selection will cycle through Analog, Digital AES3, and SDI digital, then
back to Analog. To assign a source to monitor B
,
use same process as described for A using the B
pushbutton.
Only input sources Analog-A, AES3 Digital-A and SDI channel 1 and 2 may be assigned to
monitor channel A. Only input sources Analog-B, AES3 Digital-B and SDI channel 3 and 4 may be
assigned to monitor channel B.
Monitored input sources are automatically routed to both the Analog and AES3 Digital line outputs.
Selecting one of four SDI groups is accomplished with the
SDI
pushbutton. Each SDI group
contains up to four (two stereo) digital audio channels.
The currently selected signal sources for monitor channels A and B are indicated by the LEDs
located above each VU meter pair.
The nominal sensitivity of all Analog line inputs is adjustable to 4 dBm or –10 dBv by
jumper settings on the main circuit board.
1-2. Monitor source and Monitor Mode selection
Either monitor channel A or B can be selected and routed to built-in speakers by pressing the
A
or
B
pushbutton.
Each depression of the monitor mode [ LEFT/RIGHT ] button selects one of 5 monitoring modes,
in sequence: (1) Stereo, (2) Left channel only, (3) Right channel only, (4) Monaural (5) Right
channel phase reversal ( out of phase ), then back to (1).
The LEFT and RIGHT LEDs indicate the current monitor mode:
(1) Stereo …………….… both LEFT and RIGHT LED are on.
(2) Left channel only …... only LEFT LED is on
(3) Right channel only … only RIGHT LED is on
(4) Monaural ………….… both LEFT and RIGHT LEDs flash once
(5) Right channel phase reversal … both LEFT and RIGHT LEDs flash twice.
Note that an Out-of-Phase condition listening test can be easily performed using mode 5.
The phase of the right channel will be reversed, allowing a comparative listening test to be
performed. This function is very useful when trying to determine whether a stereo signal source is
out-of-phase or not.
Speaker and/or headphone monitoring can be changed from normal Stereo mode to Left channel
only, Right channel only, or Left and Right summed mono mode by using the
LR
(Left Right)
pushbutton. Mono monitoring mode is indicated when both the L and R LEDs are flashing. Stereo
monitoring mode is indicated when both the L and R LEDs are continuously on.