stereo signal since both 1/4-inch Stereo Line jacks are connected1. The above Y?cable is placed in-line into the intercom system.
in parallel.2. Set internal switch S105 to Stereo (factory setting).
2. When internal switch S105 is set for Mono, the FP22 acceptsWiring for RTS and ClearCom Systems
1
individual left and right /4-inch mono connectors to provide a
PinRTSClearCom
stereo signal. Stereo Line jack (1) is the left input; Stereo Line
jack (2) is the right input. No loopthrough capability is available2Audio channel 1, 24VdcAudio, 18-36 Vdc power
with S105 set for Mono.
3Audio channel 2, 24 VdcAudio, 12 Vdc call signal
TYPICAL MONITORING CONNECTIONS
1.One Mono Input. A mono signal connected to an XLR or1Reference (ground)Reference (ground or com-
phone jack will be monitored as a mono headphone signal.mon)
(When using the Mono XLR connectors, the Line/Mic switch
should be set to match the input.)
2.One Stereo Input. A stereo signal connected to the Stereo
Line jacks can be monitored as a stereo output on stereo head-1221
phones or as a mono output.33
3.One Stereo Input Plus One Mono Input. A mono signal input
through the Mono XLR connector and a stereo signal input
through the Stereo Line jacks can be monitored as a mixed out-TO STEREO LINE
put, with both signals appearing in the stereo headphones.LOOPTHROUGH
CONNECTION ON FP22
4.Three Mono Inputs - Stereo Headphone Signal Output.TIP
SLEEVE RING
Three mono signals can be accepted through the mono-XLR
FIGURE 2
jacks and the stereo line jacks, and mixed and monitored as a
stereo signal in the stereo headphones.SPECIAL APPLICATIONS
NOTE: The FP22 can be modified so that all input jacks are inTroubleshooting stage sound systems. The FP22 can be
parallel. This duplicates the Shure FP12 in functionality. Thisused to trace a signal line when one or more microphones are not
modification allows monitoring in mono only. Please contactworking on stage. To locate the malfunction, loop the signal
Shure' Product Applications Group for details on this modifis-through the FP22 wherever an XLR or phone connector is lo-
cation.cated and monitor the signal.
INTERCOM CAPABILITYField monitoring applications can be set up by inserting
The FP22 can interface to commercially available intercomFP22 units ain lineo without affecting the signals.
systems, such as RTS, Telex and ClearCom. The diagrams be-On stage monitoring. With the FP22, an effective on?stage
low show how to interface the FP22 to these systems and whatin-ear monitor system can be created. From a mixing console a
can be monitored. More information about intercom systems canstereo signal can be looped through to multiple FP22's, while the
be obtained from the intercom manufacturers.Mono XLR jack can be used for an individual's microphone or
Telex Intercom Systems (Figure 1)musical instrument. Each performer has control of overall head-
Telex uses a standard balanced audio line. No modificationphone volume as well as a mix control of their individual voice or
is required to interface the FP22 with Telex intercoms.instrument with the stereo signal.
Boosting headphone output. The FP22 can be used to
1.Use the Mono XLR Loopthrough connections.
boost the headphone output of existing devices. The stereo
2. Mono XLR level switch should be set toh te Line position.
headphone output of an audio device can be connected to the
3. 24 volts phantom power on the intercom line is passed through
Stereo Line connectors of the FP22. The FP22 will provide a
the FP22.
high?quality headphone output with the ability to loop through to
another FP22.
12Using the FP22 as a two-stage intercom system. A two-
AUDIO (+)+24 VDCstage intercom system can be created by connecting two FP22
3
AUDIO (?)+24 VDCunits with a single standard microphone cable. Each person con-
REFnects a Shure SM12A or other headset microphone's XLR output
and earphone input connector to their individual FP22. Both mi-
FIGURE 1crophone signals appear at each FP22 headphone output.
Practice headphone amplifier for microphones or other
RTS and ClearCom Systems (Figure 2)
sources, such as electric instruments, synthesizers, etc. Con-
These two systems use an unbalanced audio line which re-
1nect the output from any instrument into the FP22 and monitor
quires use of the /4-inch line connectors of the FP22 for opera-
the headphones.
tion. The Y?cable depicted in Figure 2 is required for RTS and
ClearCom intercom systems.
3 |
ACEC
