Rehearsal Function; Setting The Squelch Threshold - AKG SR 4500 Mode D'emploi

3.9.1 Rehearsal Function

Note:

3.9.2 Setting the Squelch Threshold

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3 Setting Up
4. The RF meter on the receiver extinguishing and the "MUTE" message appearing mean that no signal is being re-
ceived or the squelch is active.
Switch the transmitter ON, move closer to the receiver, or set the squelch threshold to the point that the "MUTE"
message will disappear and the RF meter come on again.
The Rehearsal function detects a maximum of six dropouts and records the time each dropout occurred, the minimum
field strength at each antenna, the field strength ratio between the two antennas as a percentage, and the maximum
audio level. The recording will stop automatically after 15 minutes (or when the Rehearsal memory is full). You can view
the list of results after the recording has stopped.
1. Select "RHSL /REHEAR -> >START<* -> RECORD".
* If you do not wish to start Rehearsal turn the SETUP control CW or CCW.
Select "EXIT" to return to the Rehearsal menu.
• You can stop the test at any time by briefly pressing the SETUP control.
2. When the test is completed, the first result (Example 1 below) or "OVFL" will appear on the display.
Example 1: Dropout after 12 seconds, maximum audio level: -6 dB.
3. To scroll through the result list, turn the SETUP control CW or CCW. The first six of a total of eight memory locations
are assigned to dropouts, the last two for reception statistics (Examples 2 and 3 below).
Example 2: Antenna A was active for 55% of the test period.
Maximum audio level: -6 dB; minimum field strength at antenna A: -90 dB.
Example 3: Antenna B was active for 45% of the test period.
Maximum audio level: -6 dB; minimum field strength at antenna B: less than -100 dB.
The last item on the result list is followed by the "EXIT" option.
4. To scroll through the list again, turn the SETUP control CCW.
To return to the Rehearsal menu press the SETUP control briefly.
The adjustable squelch will mute the receiver if the received signal is too weak so the related noise or the self-noise of
the receiver will not become audible while the transmitter is off the air.
The squelch threshold settings available include "TCSQ" (automatic Tone Code Squelch) and several preset values.
In TCSQ mode, the squelch threshold remains permanently set to -100 dBm. The transmitter signal contains a conti-
nuous pilot tone. If the pilot tone stops, the receiver's audio output will be muted.
1. Select "SQL".
2. Press the SETUP control briefly. The current setting, e.g., ">-90 dB<", will be flashing on the display.
3. Select the desired squelch threshold.
4. Press the SETUP control briefly.
Select "SAVE -- >Y<" to save your new setting or "SAVE -- >N<" to reject the change.
The display will revert to the Squelch menu.
SR 4500