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SP1200 – 26
Appendix B: Button Modes
Press 1 on Power Up:
AGC Reset
• Press and hold the Input 1 button while powering up the SP1200.
• Release the Input 1 button and the Input 1 LED blinks.
This resets the AGC for all four inputs to the default setting (–5 dBu).
• Press the Input 1 button again and the OFF LED lights. This indicates that the
AGC circuit is turned off.
• Press the Input 1 button again and the OFF LED turns off. This indicates that the
AGC circuit is turned on.
• Press the OFF button to save the settings and return to normal operation.
Press 2 on Power Up:
Ambient Mic Preamp Metering
• Press and hold the Input 2 button while powering up the SP1200.
• Release the Input 2 button. The Ambient Mic Preamp gain is indicated on the LED meter.
• Use this mode to calibrate the ambient mic (see procedure on page 20).
• Press the OFF button to return to normal operation.
Press 3 on Power Up:
Paging Mic Level Adjustment
• Press and hold the Input 3 button while powering up the SP1200.
• Release the Input 3 button. The lowest Paging Mic level is indicated on the LED meter.
• Use the Up/Down buttons to adjust the lowest Paging Mic level.
• Press the OFF button. The highest Paging Mic level is indicated on the LED meter.
• Use the Up/Down buttons to adjust the highest Paging Mic level (see procedure on page 20).
• Press the Input 3 button to save the settings and return to normal operation.
Press 4 on Power Up:
Firmware Version
• Press and hold the Input 4 button while powering up the SP1200.
• Release the Input 4 button. The LEDs on the front panel indicate the firmware version in binary.
• The Input 1-4 LEDs indicate the digit to the left of the decimal point, and the LED meter indicates
the digit to the right of the decimal point.
• For example, the following illustration indicates version 1.7.
• Press the OFF button to return to normal operation.
SP1200 Button Modes
3 LED pairs lit
111 (in binary) = 7 (in decimal)
Version 1.7