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5.4 INPUT MODULE STEADY CUE INDICATION
Under normal circumstances, the Microphone and Stereo Line Input Module CUE button lamp flashes
to tally its ON status. This function can be modified to provide a steady indication on both local and
remote CUE tallies by adding a jumper wire between two "E" points on the module PC assemblies. On
Microphone Input Modules, insert the jumper wire between points E200 and E201. On Stereo Line
Input Modules, insert the jumper wire between points E212 and E213.
5.5 USING SEND CIRCUITS FOR TELCO OPERATIONS
The BMX III Telco Mix-Minus System provides the console operator with the ability to communicate
with up to two individual callers at one time (as described in Section 3.8). However, in some cases,
it may be desirable to have the additional capability to take calls both "on-air" and "off-air" without
changing the configuration of this system.
This can be accomplished by utilizing the two console Send outputs as a second, "off-air", mix-minus
system. Once configured per the instructions contained in this section, these Send outputs are routed,
in addition to the Telco Mix-Minus System outputs, to the telephone hybrid, and connected via a relay.
This relay is energized by the ON tally of the Stereo Line Input Module being used as a Telco input.
When the input module is turned ON, the caller is placed "on-air", and is fed the Telco output. When
the module is turned OFF, the caller is "off-air", and is fed the Send output (reference Figure 5.1).
In order to configure the Send outputs as mix-minus outputs, console input module internal option
switches must be set as follows:
1.
On Stereo Line Input Modules assigned as Telco inputs, set internal option switch S7 to
enable the module Direct Output to be continuous. This will cause the audio signal to be
sent to the Telco Mix Module regardless of the ON/OFF status of the input module, thereby
allowing the connection of the intercom speaker via the caller-only Telco Mix Module
Monitor Output, as shown in Figure 5.3.
2.
On all Microphone and Stereo Line Input Modules, set internal option switch S206 so that
the Sends are always active with PRE-fader selection.
Once these internal option switches have been set, the steps for connecting the Telco and Send outputs
to the telephone hybrid(s), and for assigning signal sources to the Send outputs, vary, depending on
whether one or two Send outputs are being used. Both procedures are provided below.
NOTE: Each telephone hybrid requires an individual Send output.
SINGLE SEND OPERATION (Using One Hybrid)
In systems where a single Send output is being used, connect Telco Output 1 and the Send-1 Output
to the telephone hybrid as shown in Figure 5.1 (on the following page).
PACIFIC RESEARCH & ENGINEERING
91
BMX SERIES III CONSOLE
REVISION C
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