Instruction manual

ACU-1000 Operations Manual
2-36 Interoperability Now
2.10.4.4 Operational Test and Final Adjustment
This procedure accounts for radio-to radio variations and verifies proper cross-connection
operation of the system. It will be necessary to create separate cross-connections of the radio
being interfaced with every other radio in the ACU-1000 or ACU-T system, and perform each
of the following checks. The associated DSP settings can be varied during the operational test
to check for the optimum level. Use the ACU Controller to move the setting up or down by
one level while communicating to check whether overall operation is degraded or improved,
except for correcting TX & RX levels. If these settings need modification, jump back to QB1
and perform the entire settings procedure.
If necessary, refer to relevant sections of the flow charts for more information regarding these
quick checks.
• Verify proper TX and RX levels. If problems are noted jump back to QB1 of the flow
chart. Do not modify individual module levels, or you may raise an RX level when
what is really needed is a lower TX level.
• Check for ping-pong problems.
• Listen for noise problems.
• Listen to RX signal quality to determine if equalization is required.
• Verify that the proper Squelch Type has been set.
• For Trunked radios, listen for audio delay issues (missed first syllables or too much
delay before first syllable is heard).
• Repeat the above steps as necessary.
When completed, there are two options:
If a template already exists for the radio being interfaced, click “OK” to save the settings and
exit the DSP settings screen.
If you are interfacing a radio that does not already have a stored template and you want to
create one to apply to other radios in the system (or to save these exact settings for later recall),
click “Save” and store the settings under the Template name of your choice.
2.11 PSTN Simplified Setup Procedure
These instructions assist in the basic setup of a PSTN module to the phone system it’s
connected to. This step-by-step process lists the steps in the best order to quickly achieve
the optimal results.
Note that the phone line send and receive level settings work inversely proportionate to one
another. Setting the PSTN to -9 dBm means the incoming audio in boosted nine decibels
before it is put on the ACU backplane and the outgoing is attenuated 9 decibels before it
hits the phone line. Since the audio level within the ACU chassis is 0 dBm, this will
present a -9 dBm signal to the phone system.