Williams Sound Personal PA Wideband Receiver PPA R7-4NA User Manual
Specificaitons:
Personal PA
™
Wideband Receiver, Model PPA R7-4NA
©2005, Williams Sound Corp. MCAT 037A
Williams Sound
®
Helping People Hear
1
Description:
The Personal PA R7-4NA is a four-channel wide-band re-ceiver pre-tuned to frequencies 72.1, 72.5, 72.9, and
75.7 MHz. It features a channel select knob, volume control on/off switch, and an earphone/charging jack. Built
in an impact resistant case, the R7-4NA is field tunable and will operate up to 32 hours with a single 9V non-
rechargeable alkaline battery.
The Personal PA R7-4NA is a four-channel wide-band re-ceiver pre-tuned to frequencies 72.1, 72.5, 72.9, and
75.7 MHz. It features a channel select knob, volume control on/off switch, and an earphone/charging jack. Built
in an impact resistant case, the R7-4NA is field tunable and will operate up to 32 hours with a single 9V non-
rechargeable alkaline battery.
Dimensions & Weight:
3-5/8" L x 2-3/8" W x 7/8" H
(92.1 mm x 60.3 mm x 22.2 mm);
3.2 oz (90 g) with battery
(92.1 mm x 60.3 mm x 22.2 mm);
3.2 oz (90 g) with battery
Color:
Gray
Battery Type:
9 Volt, Eveready 216 Carbon,
Eveready 522 Alkaline, or
BAT 003 NiMH Rechargeable
Eveready 522 Alkaline, or
BAT 003 NiMH Rechargeable
Battery Drain:
14 mA, nominal
Battery Life:
32 hours with Eveready 522,
6 hours/charge with BAT 003
6 hours/charge with BAT 003
FCC ID:
CNM R7, CNM R74Y
Operating Frequency:
Pre-tuned, adjustable, 72 MHz-76 MHz *
Intermediate Frequency:
75 KHz
FM Deviation:
75 KHz
De-Emphasis:
75 uS
AFC Range:
± 300 KHz
Sensitivity:
2 µV at 12 dB Sinad with squelch defeated
Squelch:
Squelches at 10 µV for minimum
50 dB S/N ratio
50 dB S/N ratio
Input Overload:
20 mV
Frequency Response:
100-10 KHz, ± 3 dB
Signal-to-Noise Ratio:
50 dB at 10 µV
Receive Antenna:
Integral with earphone/headphone cord
Audio Output:
250 mW, max. at 16 Ohms
Output Connector:
3.5 mm mini phone jack, also serves as a charging jack
for rechargeable battery
Earphone:
Earbud-type with foam cushion,
3.5 mm plug,
3.5 mm plug,
32
Ω
(Other styles available)
R7-4NA Channel Selector
4-position, rotary switch
Warranty:
5 years, parts and labor
90 days on cords, earphones, heaphones, batteries,
and other accessories
90 days on cords, earphones, heaphones, batteries,
and other accessories
NOTE: SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE!
EAR/CHG
Volume
1
On/Off
Volume
Control
Volume
Control
Earphone
Jack
™On∫ Indicator LED
Channel
1
2 3
4
Channel Switch
Williams Sound
R7-4NA Top
R7-4NA Front