CATV Switching and Control
585-765-2254 fax 585-765-9330
100 Housel Ave. | Lyndonville | NY | 14098
www.digitalalertsystems.com
Model 637 Cue Tone Instruction Sheet
Description
Digital Alert Systems Model 637
Tone Decoder allows switch
control via Cue Tones
©
.
Settings may be enabled for use
of 1 to 4 Cue Tones. The output
may be made to latch, toggle or
provide a momentary pulse.
Input levels may vary from
–24 to +6 dB of audio.
Please refer to the instruction
manual for the 3185E for specific
switch and control settings.
Installation
1. Remove the four screws on the
cover of the 637. Refer to the
model 3185E manual, and set
the jumpers for latching, toggling
or momentary, and the number
of digits to decode. Then set the
3 rotary switches to the code to
be decoded.
2. Connect the device(s) to be
controlled, to the common
(COMM) and the normal open
(NO) or the normally closed (NC)
– as desired – connections on
the terminal block.
3. The connections on the terminal
block for (RELAY 1) and (RELAY
2) are separate contacts, but are
part of the same relay.
4. The (SET) and (RESET)
connections are used as
described in the 3185E manual.
5. "AudioLo and AudioHi allow
connections of the audio
containing the DTMF tones to be
decoded. They may be
balanced or unbalanced, and
600 ohm impedance or high
impedance. Refer to the 3185E
manual for jumper settings":
6. Connect the power s
upply’s
white wire to the +12 V DC on
the 637, and the BLACK wire to
(GND
)
.
7. Replace the board in the case,
and reinsert the screws to
secure the case top.
Specifications
Auto Input Impedance
Selectable 600
10%
>10 K
balanced/unbalanced
Audio Input Coupling
AC
Audio Input Level
45 mV p~p (-34 dBmV) to 13.8 V
p~p (+16 dBmV)
Audio Input Range
-24 dBmV to 6 dBmV: adjustable
10 dBmV
Digit Validation Time
40 mSec minimum
Inter-digit Time
40 mSec to 3 Sec
Set/Reset Inputs
>20
Sec to 3 Sec
Relay Output
DPDT; 2A @ 30 VDC
Power Requirement
100-240VAC, 50-60 HZ input/
12VDC output supplied.
