3
result. Turn the Phantom switch off when phantom power
is not required.
Three-Socket XLR Input connector: provides for
connection to microphone or line level input signal
sources.
Input Mic/Line Slide Switch: selects microphone or
line-level input signals.
Link In, Out Phone Jacks: provide for connecting more
distribution amplifiers for additional outputs, or adding
external equipment such as equalizers, compressors, or
limiters. When connecting two or more FP16As together
for additional outputs, connect the Link Out jack of the
”master” unit to the Link In jacks of the others. Any
number of FP16As can be tied together in this way. The
Link In jack is input-only, and has switching contacts to
disconnect the input signal amplifier from the output
channel volume controls.
Connect an equalizer, limiter or compressor to the
FP16A by connecting the FP16A Link Out jack to the
external unit’s input, and the external unit’s output to the
FP16A Link In jack.
Signals at the Link jacks are typically 10 dB below line
level. The Link In input impedance is greater than 20 k
Ω
and may be considered a bridging impedance.
INSTALLATION AND OPERATION
Battery Operation
In addition to 120 or 240 VAC operation, the FP16A can
be operated from an internal battery pack. Current drain
is typically 22 mA at +4 dBm output level. Battery
operation is recommended for remote, on-location
operation, and as an emergency backup source in case
of AC power failure.
Access to the battery compartment is through the
bottom of the chassis. Three 9 volt transistor radio
batteries power the FP16A at full rated output. Use
alkaline batteries for maximum life. Duracell MN1604 or
Eveready 522 are recommended. Battery life is
approximately 20 hours at +4 dBm continuous use. Note
that phantom power loading will increase battery drain.
With batteries in the battery compartment, the FP16A
will automatically and silently switch to battery operation
should the AC voltage fall below a suitable level.
Connections
Connect the signal source to the three-socket XLR Input
connector and set the input Mic/Line switch for the proper
level. Connect the three-pin XLR 1-6 Output connectors
to low-impedance microphone or line level inputs of
power amplifiers, mixers, etc. Set each Mic/Line switch
for the appropriate signal level.
Connect additional distribution amplifiers or add
external equipment using the FP16A Link jacks (see
Controls and Connectors). A common ground connection
can be established using the rear-panel Ground binding
post.
Connect the line cord to a 120 VAC
±
10%, 50/60 Hz
source if the FP16A is to be ac-operated. If 240 volt AC
operation is desired, refer to the Service section.
Adjustments
Turn the On-Off switch to the On position (Power LED will
light). Turn the Phantom switch on if a
non-battery-operated condenser microphone is to be
used with the FP16A.
With an input signal applied, adjust the Input gain
control so that the Norm LED flickers during normal
speech or music (the Overload LED will flicker as the
signal level approaches clipping). Adjust the Output 1-6
controls to provide an adequate signal feed to the
following equipment.
Telephone Interconnection
When using the FP16A connected directly to a telephone
line, check to see whether the telephone company
requires an interface coupler between the FP16A and the
telephone line. If a coupler is required, make certain the
coupler selected and the wiring arrangement are in
compliance with local telephone company regulations.
When direct connection to a telephone line is not
possible, acoustic coupling to a telephone handset may
be used. A Shure Model 50AC Telephone Acoustic
Coupler can be connected to the 600 ohm line output of
the FP16A and attached to most telephone handsets.
Telephone Line Surge Protection
When using the FP16A connected directly to a telephone
line subject to lightning-induced voltage surges, the
following part (commercially available) can be installed
across the LINE OUT terminals to provide additional
protection for output circuit components: Metal Oxide
Varistor, General Electric Co., Type No. V22ZA1.
ACCESSORIES
The Model A16R Rack Panel Kit consists of a 19 in, x
3-1/2 in. (483 mm x 89 mm) precut rack panel and
necessary hardware for rackmounting the FP16A with its
cover in place and end caps removed in a standard 19”
(483 mm) rack panel.
SERVICE
Caution: These servicing instructions are for use by
qualified personnel only. To avoid electric shock, do not
perform any servicing other than that contained in the
Operating Instructions unless you are qualified to do so.
Refer all servicing to qualified service personnel.
The FP16A can be disassembled as follows. Remove
two screws fastening each end cap. Remove four screws
securing the cover assembly to the chassis. Carefully lift
the cover assembly up and away from the chassis, taking
care not to snag any wire leads or components.
240 VAC Operation
To change the FP16A operating voltage from 120 VAC to
240 VAC, follow these steps.
