J. W. Davis & Company DT-100C User manual

NEW TECHNOLOGY OLD RELIABILITY
J.W. Davis & Company •
3030 Canton Street • P.O. Box 710219 • Dallas, Texas 75371-0219
Sales 800-527-5705 • Fax [phone] • Corp 214-651-7341 • Fax [phone] • [email protected] • www.jwd.com
The Mark of the Professional...
OPERATING INSTRUCTIONS
AM/FM Digital Tuner with Music-On-Hold
Model DT-100C

1. AC Power Connection and Fuse
2. Equipment or Chassis Ground
3. 12 VDC Power Connection
4. 600-Ohm Telephone Output
5. 8-Ohm Output for Monitor Speaker
6. Music-On-Hold Volume Control
7. RCA Line Level Output
8. RCA Line Level Volume Control
9. FM Antenna Connection (75 Ohm)
NEW TECHNOLOGY OLD RELIABILITY
J.W. Davis & Company •
3030 Canton Street • P.O. Box 710219 • Dallas, Texas 75371-0219
Sales 800-527-5705 • Fax [phone] • Corp 214-651-7341 • Fax [phone] • [email protected] • www.jwd.com
The Mark of the Professional...
REAR PANEL
The J. W. Davis DT-100C Tuner has been specifically engineered with features for commercial and industrial
applications. The monaural output combines incoming stereo signals ensuring full frequency response distribu-
tion throughout each speaker’s coverage area. The memory keys allow the desired AM/FM stations to be preset
to discourage tampering. A separate music-on-hold amplifier permits the volume level of the music that is
provided to incoming calls to be set separately from the line level out to the power amplifier. A 12 VDC power
connection is available for emergency power or for use in remote locations. A memory chip retains station
memory for 14 days if all power is lost. Large digital display permits easy station identification. All necessary
accessories for tuner use are included. 5 year warranty.
WARNING: THIS APPLIANCE MUST BE GROUNDED
RISK OF ELECTRIC SHOCK
DO NOT OPEN
Do not use a “3 to 2” power cord adapter or cut the AC power cord ground
prong on the AC power cord plug. Either of these actions will cause the J.W.
Davis & Company warranty to be voided.
FRONT PANEL
1. Tuner Display.
2. AM-FM Selection Key
3. Frequency Down/Up Key
4. Scan Key
5. Set Memory Key
6. Power Indicator
7. Memory Keys (M1/M5)
8. Memory Shift Key (M6/M10)
9. Power On-Off Switch
10. AM Antenna Connection

SIGNAL
For FM reception, connect the dipole antenna to the 300Ω /75Ω balun then to the FM antenna connection at the rear of the
unit. Connect the supplied AM loop antenna to the push-to-lock terminals.
1. Select AM or FM with the BAND key.
2. Use the UP/DOWN keys to set a frequency manually or the SCAN key to automatically search for the desired
station.
3. To program a station, press the ME (Memory) key, then press location (M1-M5),
4. To program memory keys M6-M10, press the ME (Memory) key, then press the SHIFT key, then press location
keys M1-M5.
The DT-100C may be operated from a 12VDC power source. Screw terminals are provided for
this purpose. When connecting the DC source, ensure that the polarity is correct and that
the DC supply is protected with a 1A fuse. (Note : The power On-Off switch is bypassed
when operating the DT-100C from a 12VDC source. For power backup, connect a 12VDC
source to the 12 VDC Power Connection. The DT-100C will continue operational status if AC
power is lost.)
The mono signal output of the DT-100C tuner is accessed from either of the two RCA jacks located on the rear panel. The
enclosed RCA patch cord should be connected between either of the RCA output jacks then to an Aux/Line input on the
amplifier. Two RCA output jacks are available to feed same tuner signal to two systems. The
output level may be adjusted by the volume control located near the line output jacks. If your
installation only has microphone level inputs available, call J.W. Davis Customer Service for
different types of attenuaters to modify line level signals.
NEW TECHNOLOGY OLD RELIABILITY
J.W. Davis & Company •
3030 Canton Street • P.O. Box 710219 • Dallas, Texas 75371-0219
Sales 800-527-5705 • Fax [phone] • Corp 214-651-7341 • Fax [phone] •
The Mark of the Professional...
MUSIC-ON-HOLD
A separate 1-watt amplifier allows the music-on-hold feature to be controlled independently of the primary preamplifier.
To facilitate station tuning and setting the desired volume level for music-on-hold, it is suggested that a speaker be connected
to the special 8 ohm output. This is also useful for monitoring purposes. Care should be taken to avoid signal distortion by
overdriving the music-on-hold volume level.
TUNER OPERATION
Due to the steel construction of the tuner, tuned antennas are not fitted within the cabinet. An AM loop antenna and FM
dipole antenna with balum is enclosed to provide the desired signal. Your DT-100C tuner has been tested to perform well in
poor reception areas. However, should you experience difficulties, call J. W. Davis & Company Customer Service for
assistance.
ANTENNAS
ALTERNATE DC POWER SOURCE
Hardware Included:
RCA patch cord
300Ω/75Ω FM antenna balun
FM dipole antenna
AM loop antenna
Technical Specifications
Type
Model
Tuning Range
Sensitivity
FM
AM
FM
AM
Frequency Response
Distortion
S/N
RCA/Line Output
600 Ohm Output
8 Ohm Output
AM/ FM Digital Tuner Unit
DT100C
87.5 ~ 108 MHz
530 ~ 1710 kHz
<3µV (26dB S/N)
<30µV (20dB S/N)
30Hz ~ 15kHz (-15dB/+1~3)
< 1%
>63dB (1mV, FM)
500mV (0~1V Adjustable)
0 ~ 1V Adjustable
0 ~ 2.83V Adjustable
Rack mount kit (RAK-100C)

NEW TECHNOLOGY OLD RELIABILITY
J.W. Davis & Company •
3030 Canton Street • P.O. Box 710219 • Dallas, Texas 75371-0219
Sales 800-527-5705 • Fax [phone] • Corp 214-651-7341 • Fax [phone] • [email protected] • www.jwd.com