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Model FP24 User Guide
Microphone Mixer
Headphone Monitoring
General Description
• Switchable between program audio or external (stereo) tape
The Shure FP24 is a studio-quality two-channel, portable, stereo
returns.
microphone mixer. With assignable L-C-R inputs, built-in slate mi-
• High current headphone output has level control and peak
crophone, 1 kHz tone oscillator, and headphone monitor, the FP24
indicator.
is extremely flexible. Its impressive audio performance and com-
prehensive feature
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Specifications Gain: Limiter: Mic Input to Output, per channel, continuously variable Thresholds independently adjustable from +6 dBu to +18 dBu Output Gain Range 10:1 limiting ratio LINE –∞ – 66 dB 5 ms attack time, 100 ms release time TAPE –∞ – 56 dB Amber/Red LED indicates limiting/clipping Frequency Response: Dual mono or stereo linked 20 Hz – 30 kHz, +0.2, –0.5 dB; –1 dB at 5 Hz, 50 kHz (relative to 1 kHz level with 150 ohm source, gain controls set Internal Voltage Rails: at 50%) +15 V an
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Front Panel Controls, Connectors, and Indicators 12 6 910 11 L 13 4 +16 –30 –15 0 +4 +8 +12 POWER MIC R FP24 METER 1kHz 12 1 2 L C R L C R SLATE TAPE RTN PHONES INT EXT 3 5 78 Figure 1. Front Panel 1. Input Gain Controls 8. Tape Return Switch Sealed, conductive plastic rotary potentiometers. Toggle switch allows external audio to be monitored in the headphones. The center position is FP24 program audio. 2. Input Peak/Limiter LEDs The left and right positions monitor tape return audio; the left
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Output Panel Connectors 1. Strap Slot Attachment point for camera straps. 2. Tape Return Input Connector 2 3 1 3.5 mm ( / in.) TRS stereo (unbalanced) input for head- 8 phone monitoring of external audio sources. 1 Tip = left, ring = right, sleeve = ground. 4 3. Left and Right Line Level Outputs Active-balanced XLR line-level outputs. +22 dBu peak out- put level. Pin 2 = hot, pin 3 = cold, pin 1 = ground. Pin 3 TAPE RTN can be grounded or ungrounded to drive unbalanced inputs. 5 1(L) 2(R) 4.
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Limiters Power Sources and Battery-Life The FP24 has two built-in peak-responding limiters, one for each The FP24 operates from either two internal AA alkaline cells or input channel. Each limiter has a two-stage circuit: the first stage an external 5–14 VDC battery supply or AC to DC transformer keeps the input gain stage from clipping; the second stage limits the (such as the Shure PS20). The power connector is a locking, variable gain stage according to the Limiter Threshold control set- thre
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This class B digital apparatus complies with Canadian ICES–003. NOTE: When interconnecting the FP24 and FP33, inputs from Eligible to bear CE marking. the FP24 appear at the FP33 mixbus with their polarity reversed. Conforms to European EMC directive 89/336/EEC: Professional Audio Products (This is unavoidable due to the nature of the interconnection.) To Standard EN 55103 (1996); Part 1 (emissions) and Part 2 (immunity). The FP24 is avoid cancellation or interference effects (e.g., comb filte
