Shure FP33 manual Front Panel Controls and Indicators Figure

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1	2	3		4		5		6				7	8	9	10
										FP33
			1 kHz		LINK								SLATE		ON
											PEAK/LIM
L		R	L	R	L	R					BATT
										VU				L
	PAN			PAN	PAN/BAL			MIC
										-2 -10-7-5 -3	0	+3 +5			L+R	R
										0
									L	R				L		ST
3		7	3	7	3	7	-20		0	VU		+3 +5		R
										-20-10-7- -3	0
										5
										LIM
0		10	0	10	0	10			+15		PEAK/LIM
	1			2		3		MASTER	dB					MON
11				12			13	14	15	16		17		18	19

Figure 1

FRONT PANEL CONTROLS AND INDICATORS (Figure 1)

1.Pan Control: Adjusts the amount of input signal sent to the Left and Right outputs. Each Pan knob has a center detent position. To avoid accidental movement of the knob once it has been set, it may be pushed in flush with the front panel.

Note: Pan Control 3 becomes a Left/Right Balance Control when the LINK switch is activated (see the LINK switch description for details).

2.Input Level Bi-Color LED: Glows green to indicate the presence and relative level of an input signal. Also glows red if the input signal reaches 6 dB below the clipping (distortion) level. To program this LED so that it functions only as a clipping level indicator, open the battery compartment and move DIP Switch 10 to the Off position.

3.1 kHz Tone Oscillator Switch: Use the 1 kHz tone to send a reference signal to any device connected to an FP33 output. The 1 kHz tone mutes all inputs. The tone level can be adjusted with the Master control.

4.Link Switch: In the LINK position (up), this switch links the gain controls of Inputs 2 and 3 so they act as a stereo pair. Input 2 is Left and Input 3 is Right. The Input 3 Gain knob adjusts the level of the stereo pair. The Input 3 Pan knob adjusts the Left/Right balance.

Note: Channel 2 Gain and Pan are disabled when the LINK switch is activated. The low-cut filters for Input 2 and Input 3 are not linked.

5.Slate Microphone: The built-in condenser micro- phone is activated when the Slate button is pressed. See the Slate Button section for more information.

Note: To disable both the Slate microphone and the Slate tone, set internal DIP Switches 5, 6, and 7 to Off. The Slate microphone may also be modified to act as a talk-back microphone for communications. Refer to the Internal Modifiable Functions section for details.

6.Meter Lamp/Battery Check Switch: The Meter Lamp function is activated by momentarily pushing this switch upward. This function can be internally pre- set for timed or toggled deactivation. See the table in the Internal Switches and Controls section for details.

The Battery Check function is activated by momen- tarily pushing this switch downward. The status of the two 9 V batteries is indicated on the VU meter. When the mixer is using an external dc supply and no batter-

ies, the Battery Check indicates the status of the exter- nal operating voltage. When the mixer is using 9 V batteries and an external dc supply, the Battery Check indicates the status of the higher voltage source. A low battery condition also is indicated when the Power On LED changes to red and flashes at a slower rate. For instructions on modifying the FP33 to allow only inter- nal batteries or external power to be monitored at the VU meter, see Internal Modifiable Functions.

Note: The audio signal is not interrupted when the Battery Check switch is activated.

7.Output Peak/Limiter Bi-Color LED: Glows red for the individual Left and Right Channels when the out- put signal reaches a factory preset peak level of +17 dBm. This peak level is user-adjustable from 0 dBm to +17 dBm. (See the Peak LED Adjustment instruc- tions.) If the Limiter is switched on, each LED glows green to indicate Limiter operation. The LED will still glow red if the preset peak level is reached before the Limiter activation point is reached.

8.Slate Button: Activates a 400 Hz Slate Tone for one second and also activates the Slate Microphone. The Slate Microphone remains on while the button is de- pressed. The Slate signal (Tone and Mic) appears at the Left and Right outputs to identify the beginning of a take. If desired, the Slate features can be modified as follows: disable the Slate Tone; insert the Slate sig- nal pre-Master control; or insert the Slate signal post- Master control. See the Internal DIP Switches table for instructions.

Note: To disable both the Slate microphone and the Slate tone, set internal DIP Switches 5, 6, and 7 to Off.

9.Power On/Off Switch: Turns the mixer on and off. The mixer is on when this switch is in the “up” position.

10.Power On LED: Monitors the higher of the internal or external voltage sources. Flashes green to indicate power is on and voltage is greater than 12 Vdc. Flashes red and slower to indicate low power (12 Vdc or less).

When this LED monitors the internal battery level, it glows red typically when 30 minutes of battery power remain. Refer to the Internal Battery Life section. For instructions on modifying the FP33 to allow only in- ternal batteries or external power to be monitored at

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