GAI-Tronics ICS Zone 2/22 Weatherproof Page/Party Station - Manual (Page 14)

Pub. 42004-734L2D
ICS Zone 2/22 Weatherproof Page/Party
®
Station Page 12 of 33
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Speaker Impedance Supervision
When this feature is configured, the station will supervise the speaker line for changes in the speaker line
impedance. To perform this function the station must be calibrated for the impedance of the speaker(s)
attached. If the station has never been previously calibrated, the station will report a speaker fault within
15 minutes of being configured for this feature. The station may be calibrated either “locally” at the
station or “remotely” by a system command from the ADVANCE head end. See the ADVANCE System
Programming Manual for details of “remote” calibration.
To perform a “local” calibration, first ensure that the station is configured for speaker impedance
supervision. Next, set the station's address to 0x02. Wait until you hear a single-beep tone at the attached
speaker. This should occur within 20 seconds. This tone indicates that a successful calibration was
performed.
If instead a double-beep tone is heard, this indicates that the station attempted to calibrate but was
unsuccessful (the attached impedance is out-of-range). If a tone is not heard, the station may not be
configured for speaker impedance supervision or there is an open connection to the speaker.
After hearing the single beep tone, set the address back to its original value to resume normal station
operation with the new calibration value.
NOTE: If this feature is used, then jumper P9 of the Main PCBA must be in the HI (default) position.
FSK Signal Gain
The FSK Signal Gain, R13, adjusts the FSK transmit signal strength. It is set at the factory and should
not be adjusted by the installer.
Attaching the Front Panel
After all adjustments have been completed, place the front cover in the rear enclosure, being careful not to
pinch any cables. Secure the front cover using the four screws and washers provided. Torque the screws
to 50 in-lbs (5.65 n-m).