SECTION 3: OSCOR MANUAL OPERATION
49 REI OSC-5000E
Speaker Monitoring Control
The EXT button provides control of input to the OSCOR speaker. Using this button, the
speaker can be configured to monitor the main audio from the receiver (this is the
default), the reference audio system or sound from an external source. These features
allow the OSCOR’s built-in audio amplifier to be used for miscellaneous audio testing.
The OSCOR can also use the external reference to directly feed a known sound source
such as a CD player into the correlator. Plug an external source into the EXT REF input
using a patch cord to automatically by-pass the reference microphone and feed the
external signal directly into the correlator system. Once the external source is plugged in,
the OSCOR speaker can be used to output the reference signal.
The EXT REF jack is used to provide an input for an external reference sound source such
as a remote microphone, a music source (CD player), or an intercom system (see page
95 Activating a Known Sound Source). Moreover, you can plug the Balanced Audio
Coupler using the Audio Patch Cord into the EXT REF input and connect it to the
earpiece to listen to the normal phone sounds (see page 104 Testing Telephone with
OSCOR).
The default operation is to monitor the audio from the received signals.
To monitor the main receiver system:
1. Press the EXT button to access the Audio Monitor Menu.
2. Press the F1 button until the display says “MONITOR / RECEIVER”.
To use the OSCOR as an audio amplifier by inputting a reference external audio source:
1. Connect the external source of your choice, and press the EXT button to access
the Audio Monitor menu.
2. Press the F1 button until the display says “MONITOR / REFERENCE”.
3. Press the F4 to choose the attenuator mode. The default is AUTOATTN. This is the
most reliable and recommended setting. However, you can manually turn the
attenuator on or off using F4.
Technical Notes:
Since some music sources such as CD players do not have external speakers, you can
use the OSCOR speaker to provide the sound source.
While listening to the speaker or using the headphones, if you hear the reference
sound source, you have verified that the OSCOR is in the correct mode. If there is
nothing plugged into the EXT REF jack and the OSCOR is placed in the
MONITOR/REFERENCE Mode, the speaker will have a feedback ringing because the
built-in microphone is being fed directly to the speaker.
NOTE: It is recommended that the AUTOATTN not be used in conjunction with
Automatic Mode operation because it slows down the automatic operation. ATTN ON is
the recommended setting.
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