ST-809
Operating Instructions
MODEL ST-809 Selective Call
and Remote Control Decoder
Manual Number: 600-0101
GENERAL
The ST-809 is a sub-miniature DTMF Address Decoder
designed for Selective Calling and Remote Control
applications via radio or wire line. Due to the small size the
ST-809 is especially applicable for installation in hand-held
and mobile radios. The ST-809 uses surface mount and uP
technologies to produce a small sized product aimed at the
limited available space in modern two-way radios. The ST809 will respond to an address of 1 to 7 digits in length using
any of the 16 DTMF characters. There are no restrictions on
the use of repeated digits in the address. This provides greater
than 250,000,000 unique addresses. Digit position and
address length recognition virtually eliminate the possibility of
response to incorrect addresses. Group/All call, Radio Kill,
Call Alert Tone, Transpond Acknowledgement and Remote
Reset are additional features.
Application information is available or can be developed for
most radio models. Many of our application notes are
available for instant access on our web site
http://www.selectone.com. If you would like application
details for a specific radio, please call us TOLL FREE at
(800)227-0376 or request assistance via fax at (510)781-5454
or E-Mail at techsupport@selectone.com.
Revision: A
OPERATING SPECIFICATIONS
Parameter
1
OPERATION
The ST-809 is generally set up to monitor DTMF signalling
on a radio or wire line circuit. For radio applications, ST-809
outputs are used to mute receiver audio, blocking out
unwanted channel traffic. When the correct PRIMARY,
SECONDARY, or ALL CALL DTMF address is received, the
decoder latches its DECODE LATCHED OUTPUT to unmute the host radio. On decode the DECODE
MOMENTARY, CALL LAMP and ALERT TONE outputs
can be used to activate a multitude of audible or visual alerting
devices. Decode of the PRIMARY ADDRESS CODE activates
the PTT and TRANSPOND TONE outputs permitting contact
acknowledgement to the calling radio operator. When the
radio operator responds to the call, all outputs are reset on the
“ON-HOOK” to “OFF-HOOK” transition. Use of PRIMARY,
SECONDARY, or ALL RESET permits remote reset of all
functions. The ST-809 provides a special RADIO KILL
function. When RADIO KILL is decoded the ST-809 will
open the PTT circuit and mute the receiver. The condition of
this function is stored in EEPROM making it immune to reset
by radio power down. Radios that have been “KILLED” may
be restored to operation when the ST-809 receives a
RESTORE address.
Min
Power supply voltage
Power supply current
Open collector output (sink
current)
Call Lamp output current
(sink or source)
Temperature range
DTMF input (HI range)
DTMF input (LO range)
Signal to noise ratio
DTMF twist
Digit recognition time
Interdigit time
Decode time
Decode Momentary time
Transpond/Alert tone level
Transpond duration
Transpond Tone Freq.
Alert Tone Freq.
Call Lamp Flash (50% duty
Cycle)
Interconnect type
Size
Typ
5.5
−30
30
10
12
Max
V DC
mA DC
mA DC
200
mA DC
+60
850
280
°C
mV RMS
mV RMS
dB SINAD
dB
mS
mS
Interdigit time1
Sec.
V p-p, no load
Sec
Hz
Hz
mS
±10
20
50
0
0.050
100
2300
1
590
5
2.34
874
528
500
Unit
25
7
80
900
13 pin miniature low profile connector.
1.5"L x 0.85"W x 0.25"H
(38.1mm x 21.6mm x 6mm)
Measured from the end of the last DTMF character in the sequence.
Specifications are Subject to change without notice.
INSTALLATION
MOUNTING:
Use of a double-sided adhesive pad or an insulating piece of
Mylar eliminates hardware requirements. When using the
adhesive pad, mount the ST-809 on a clean, dry surface,
oriented to allow easy routing of the wiring to the radio. Press
firmly after mounting to ensure good adhesive contact. Do not
touch the adhesive or attempt to re-position the unit after
mounting.
WIRE INTERFACE:
Connector pin numbers are shown in brackets [#]. Wire colors
represent the assignment on the mating connector
[9] Negative (−
− ) Supply (BLK): Connect to system (−)
Supply (GND).
[3] Positive (+) Supply (RED): Connect to system (+) Supply
(5.5 to 25Vdc).
Selectone Inc. — 3501 Breakwater Ave., Hayward, Ca. 94545 — (510) 781-0376 — Fax: (510) 781-5454
Toll Free: (800) 227-0376 — E-Mail: admin@selectone.com — Web Site: www.selectone.com
[12] DTMF Signal Input (GRN): Connect to signalling
audio source, e.g., discriminator output, volume high, etc.
This input will accept levels between 10 and 850 mVrms in
two ranges. Factory default input range is 10 mVrms to 280
mVrms. If the input level is > 280 mVrms and less than 850
mVrms, the HI input level range may be selected in custom
configuration. Connection to the speaker output is not
recommended due to the extremely wide dynamic range across
a speaker.
NOTE: This point must not mute while awaiting signalling
tones.
[2] Call Lamp #1 (VIOLET): Open collector output, to
provide a flashing or steady “ON” CALL LAMP. This output
remains active until an ON-HOOK to OFF-HOOK transition
or receipt of a remote reset command.
NOTE: CALL LAMP #2 must be tied to NEGATIVE (-)
SUPPLY when using CALL LAMP #1 as an output.
[11] Call Lamp #2 (BLUE): Open emitter output, to provide
a flashing or steady “ON” CALL LAMP. This output remains
active until an ON-HOOK to OFF-HOOK transition or
receipt of a remote reset command.
NOTE: CALL LAMP #1 must be tied to POSITIVE (+)
SUPPLY when using CALL LAMP #2 as an output.
Did You Know…?
Most Call Lamps are LED’s which require a series current
limiting resistor.
[13] Transpond Tone (WHT/GRN): 874 Hz tone active only
while PTT OUTPUT is active for transpond.
[4] Decode Latched (WHT/ORG): Connect to the muting
point in the radio. This output goes to the UNMUTE condition
upon decode, if the MONITOR/RESET Line is “ON-HOOK”.
It may be reset to the MUTE condition by a “OFF-HOOK”
then back “ON-HOOK” transition of the MONITOR/RESET
line. If the MONITOR/RESET line is “ON-HOOK” this
output may be reset remotely with the PRIMARY or
SECONDARY RESET address code. This output can be
customized with the sink/source and the state programming
parameter. See the programming section for customising
details.
[8] Unused.
FUNCTIONAL DESCRIPTION
The microprocessor circuit of the ST-809 utilises an advanced
decoding algorithm which allows all possible combinations of
the sixteen standard DTMF tone pairs in codes of one to seven
digits in length. The decoder ignores codes of incorrect
length, even though they may contain the correct code within
them. It is allowable, for example, to install decoders
programmed with codes “1’, “12,” “123,” “1234” and
“12345” in the same system without improper activation of
any of the units. ST-809 factory default application parameters
accommodate most applications. For unique configurations,
the ST-809 permits the installer to customise most outputs and
timing to accommodate the specifics of the application.
[6] PTT Input (YELLOW): Used with the RADIO KILL
feature. The PTT path between the mic and radio is broken
and the ST-809 placed in series. This lead goes to the mic side
of PTT. Additionally this line acts as a “set” function to force
the radio to un-mute if PTT is activated on a muted radio
(eliminates multiple blind transmissions)
CUSTOM CONFIGURATION
[10] PTT Output (BLK/YEL): Open collector output,
saturates to (-) Supply (GND) following the PTT input unless
RADIO KILL is activated. Additionally this input is used to
key the transmitter after each Primary or Remote Control
sequence to permit transpond. This lead goes to the radio side
of PTT.
To enter the configuration mode, press and release the
monitor switch (or manipulate the hook switch at least five
times in the first five seconds following power turn-on. The
ST-809 verifies entry to the configuration mode by generating
an alert tone and toggling the call lamp outputs for about 6
seconds. The call lamp will remain ON while in the
configuration mode. Once in the configuration mode,
configuration can be accomplished via a DTMF encoder
connected to the Rx signal input [(-) Supply as common], or
Over the Air via a Service Monitor or DTMF equipped
transmitter.
[5] Decode Momentary (ORG/BLK): Open collector output
saturates to (-) Supply (GND) for the programmed momentary
time following each Primary or Secondary sequence.
[7] Monitor/Reset (BROWN): Connect to the microphone
hook switch, hang-up button or box. This lead places the
DECODE LATCH output in UNMUTE condition when offhook and resets all other outputs on the transition from “ONHOOK” to “OFF-HOOK”. Refer to custom programming to
customise the MONITOR/RESET line for your application.
[1] Alert Tone (WHT/BLU): 528Hz tone pulsed 250mS
“ON” then 250mS “OFF” for local user alerting applications.
This tone remains active until reset.
Before use, all ST-809’s must be configured to accommodate
the specifics of the application where it is being used, and to
its own address codes. Most applications only require
customisation of the address codes.
⇒ To exit the configuration mode remove power from the
ST-809.
⇒ If an error occurs while keying in a configuration
sequence, Press * to Clear the Current Entry. Once
cleared, additional entries may proceed as required.
⇒ To return the unit Factory DEFAULT (known starting
point) Press 99. Additional entries may proceed as
required.
Custom Configuration can be grouped into 4 sets of related sequences.
#1 = Six (6) decoder address sequences.
#3 = Seven (7) application specific parameters.
#2 = Three (3) timing parameters.
#4 = Four (4) operational modes.
In most applications ONLY the primary and secondary address codes need to be programmed. The other programmable
parameters can usually be left at the factory default. The programmability is only available to accommodate unique and creative
application requirements that occur world wide..
Table 1-1 indicates the entry sequences required to customise all ST-809 parameters.
•
The entries must be made from the configuration
mode.
•
Each prefix and suffix digit MUST have a tone
duration of at least 1 second (button down). Other
digits may be entered at normal dialing speed (greater
than 50 mS and less than 500 mS).
•
While in the configuration mode, there is no interdigit
timing.
•
•
•
•
Time entries must be three digits. X X being any
numeric character. M being the multiplier power of 10.
When entries are saved to EEPROM (release of the
long #) the call lamp will flash OFF twice and the
alert tone will beep twice.
If a mistake is made during entry, press and hold the *
for longer than 1 second to erase the current entry
sequence.
Address entries may have 1 to 7 digits (X’s on the
chart). Each digit may be any DTMF character.
TABLE 1-1: CUSTOM CONFIGURATION
Group
Function
Clear Current Entry
Condition
Prefix
Keystrokes
BAD ENTRY
Suffix
Factory Default
*
Return to Factory
DEFAULT
99
1
Primary Address
UN-MUTE RADIO
11
XXXXXXX
NONE
#
159D*86
1
Secondary Address
UN-MUTE RADIO
12
XXXXXXX
#
DISABLED
1
Radio Kill
KILL RADIO OPERATION
13
XXXXXXX
#
DISABLED
1
Primary Reset
MUTE RADIO
21
(X)XXXXXX
#
PRIMARY + #
1
Secondary Reset
MUTE RADIO
22
(X)XXXXXX
#
SECONDARY + #
1
Restore from Kill
RESTORE RADIO OPERATION
23
(X)XXXXXX
#
KILL + #
2
Interdigit Time
MAX. TIME BETWEEN DIGITS
31
XX M
#
20 x 102 mS = 2000 mS
2
Call Lamp Flash
ON / OFF TIME 50/50 DUTY CYCLE
32
XX M
#
50 x 101 mS = 500 mS
2
Call Lamp Steady
NO FLASH
32
00 0
#
2
Decode Momentary
ON TIME
33
XX M
#
3
Rx Input Sensitivity
HIGH (30 - 850 mV)
41
20
#
20 X 102 mS = 2000 mS
3
Rx Input Sensitivity
LOW (10 - 280 mV)
41
21
#
3
Mon/Reset Polarity
GND TO MONITOR
41
30
#
HIGH
3
Mon/Reset Polarity
OPEN TO MONITOR
41
31
#
OPEN TO MONITOR
3
Decode Latched
ON = SINK
41
40
#
ON = SINK
3
Decode Latched
ON = SOURCE
41
41
#
3
Decode Latched
OFF = MUTE
41
50
#
3
Decode Latched
ON = MUTE
41
51
#
3
All Call
DISABLED
41
60
#
3
All Call
ENABLED
41
61
#
3
Transpond
DISABLED
41
80
#
3
Transpond
ENABLED
41
81
#
3
Sequence Length
OVER LENGTH OK
41
70
#
ON = MUTE
ENABLED
ENABLED
3
Sequence Length
OVER LENGTH REJECT
41
71
#
OVER LENGTH REJECT
4
Remote Control: MODE #1
SELECTIVE CALL OPERATION
42
1
#
ENABLED
4
Remote Control: MODE #2
F1, F2, F3
42
2
#
DISABLED
4
Remote Control: MODE #3
(F1, F2 INTERLOCKED), F3
42
3
#
DISABLED
4
Remote Control: MODE #4
F1, F2, F3 ALL INTERLOCKED
42
4
#
DISABLED
DEFINITIONS & KEYSTROKES:
PRIMARY ADDRESS CODE:
The CALL LAMP OUTPUT flashes the lamp ON and OFF.
This parameter sets the ON and OFF time. The range is: 100
to 900 mS with a 50/50 duty cycle.
One to seven digit sequence, user-definable. Reception of this
code activates all outputs including the PTT
and
TRANSPOND TONE outputs, which are generally used to
key the radio transmitter momentarily and send an
acknowledgement tone. The PRIMARY ADDRESS CODE
may be recalled any number of times, setting off the
momentary outputs each time, without resetting the decoder.
The decoder may be reset locally by the “ON-HOOK” to
“OFF-HOOK” transition of the MONITOR/RESET line.
Remote reset occurs on receipt of the PRIMARY or
SECONDARY RESET addresses. Receipt of the ALL
RESET code ([#] for 5 seconds) also produces reset.
NOTE: [3] [2] [0] [0] [0] [#] sets the CALL LAMP FLASH
RATE to steady state ON. No flashing.
SECONDARY ADDRESS CODE:
Rx INPUT SENSITIVITY:
Identical to PRIMARY with the exception that TRANSPOND
TONE and PTT do not occur. This address is often used for
group call. In Group applications, stations transponding
simultaneously would produce radio interference with each
other.
To accommodate the wide range of possible input levels, two
sensitivity ranges are available. HIGH (10 - 280 mVrms) and
LOW (30 - 850mVrms).
RADIO KILL:
This is used to remotely disable selected radios. PTT and
TRANSPOND output activate to acknowledge receipt of these
signals.
NOTE: Radio Kill status is stored in EEPROM to insure
retention during loss of power.
NOTE: The transpond tone is a double beep for RADIO
KILL.
RESET and RESTORE:
The reset addresses factory default to equal the address code
plus a # suffix. When a reset function is programmed as one
digit it is inferred to be a suffix to the address code. When
reset and restore are programmed to more than one digit, the
programmed sequence becomes the reset or restore address.
DECODER MOMENTARY OUTPUT:
Following reception of a valid Primary or Secondary address
sequence, this output conducts to (-) Supply (GND) for this
time period. The range is 50 mS to 590 Sec. (9.83 min.)
Example: [3] [3] [5] [0] [2] [#]
sets DECODER
MOMENTARY time to 5000 mS or 5 seconds.
MONITOR/RESET POLARITY:
The Monitor/Reset lead is normally connected to a radio
monitor button or hook switch. This parameter sets the sense
polarity.
DECODE LATCHED OUTPUT
SINK/SOURCE: The Decode Latched Output normally
connects to the muting point in the radio. SINK refers to
transistor Q6 being turned on presenting a low impedance
between its collector (J1 pin 4) and (-) Supply.
SOURCE refers to transistor Q5 being turned on presenting a
low impedance between its collector and (+) Supply (J1 pin 4)
(R17 limits the current output capability). In either mode,
when OFF, J1 pin 4 is high impedance (open circuit).
DECODE LATCHED OUTPUT:
This is the time permitted between DTMF button presses by a
calling party. The Factory default of 2000 mS is intended for
normal manual dialing. If an automatic dialer is used, a
shorter interdigit time reduces probability of false decodes.
Shorter interdigit time reduced the delay before activation at
the end of a sequence. The range is: 50 to 2300 mS.
ACTIVE STATE: The Decode Latched Output normally
connects to the muting point in the radio. Active state is the
condition this output (J1- pin 4) provides to the host radio to
produce Rx Audio Mute. Though SINK is the most common,
SINK, SOURCE, and OPEN CIRCUIT are application
possibilities. ON refers to the condition of J1 pin 4 as
presented to the host radio when J1 pin 4 will SINK or
SOURCE to MUTE the radio. OFF refers to the condition of
J1 pin 4 as presented to the host radio when J1 pin 4 will
SINK or SOURCE to UN-MUTE the radio.
Example: [3] [1] [1] [0] [2] [#] sets interdigit time to 1000
mS or 1.0 seconds.
ALL CALL:
CALL LAMP FLASH RATE :
ENABLE/DISABLE: Application parameter that permits the
ALL CALL and ALL RESET functions (reception of > 6 Sec.
of * or #) to be disabled.
INTERDIGIT TIME:
TRANSPOND:
ENABLE/DISABLE: Application parameter that permits the
TRANSPOND function to be disabled. This function is
needed if TRANSPOND is not desired or legal, but RADIO
KILL is required (PTT OUTPUT has to be hooked up).
associated to the function may be turned ON or OFF
individually or interlocked as described in the configuration
chart.
CALL LAMP = Function #1 (F1) = Pri. Address and Reset
DECODE MOM = Function #2 (F2) = Sec. Address and Reset
NOTE: Transpond applies to Primary, Primary Reset and all
Remote control functions.
DECODE LATCHED = Function #3 (F3) = Kill and Restore
SEQUENCE LENGTH REJECT:
NOTE: Interlocked functions do not have individual reset
addresses. Activation of interlocked functions resets the
associated function(s).
ENABLE/DISABLE: The ST-809 verifies the length of an
incoming DTMF sequence. To insure the sequence length is
correct the ST-809 must look for additional digits before and
following a valid sequence. This is why the ST-809 does not
decode immediately on the release of the final digit in a valid
sequence. This application parameter Disables the Sequence
Length checking following the final digit in a valid sequence.
When disabled the ST-809 will decode immediately on release
of the final digit.
REMOTE CONTROL:
The ST-809 has four operational modes. As shipped from the
factory, the ST-809 is configured for selective calling
applications (MODE #1). By selecting one of three other
operational modes 2, 3, or 4, the ST-809 may be used for
Remote Control applications. When a Remote Control mode is
selected the hook switch is disabled. Three of the outputs are
redefined as open collector control outputs. The output
NOTE: Remote control output states are stored in EEPROM
to insure retention during loss of power.
Example: In MODE 3, reception of the Primary Address sets
F1 to ON and resets F2 to OFF. Reception of the Secondary
Address sets F2 to ON, and resets the F1 to OFF. F3 is
independent.
Example: In MODE 4, reception of any function resets the
other two functions.
When any Remote Control function is set or reset, Transpond
occurs. Transpond for remote control always consists of three
beeps. A high frequency beep indicates ON a low frequency
beep indicates OFF. Beeps 1 - 3 represent F1 - F3.
WARRANTY POLICY
All standard Selectone products are guaranteed to meet or exceed published performance specifications and are
warranted against defects in material and workmanship for a period of five years from the date of purchase. Special
configurations and non-standard systems are warranted for a period of one year.
If any standard Selectone product fails to operate within the first 90 days from the date of purchase, Selectone will
immediately send a replacement unit post-paid via airmail or UPS Orange Label (air), and will issue full credit, including
freight, upon the return of the defective unit(s). Prepay/C.O.D. customers must return the defective equipment prior to
exchange or will receive the replacement C.O.D. with credit issued only on the return of the defective equipment.
After 90 days, this warranty is specifically limited to correction of the defects by factory or replacement of faulty
equipment or parts.
All warranty repairs must be performed at the Selectone factory in Hayward, California. No credit will be given for
unauthorized repair work attempted by the customer. Any unauthorized alterations or modification of the equipment,
damage by external sources, or removal or alteration of the serial number label or date code, will void the warranty.
Specifically excluded from this warranty are batteries, fuses, lamps, and damage caused by lightning, power surges, or
mechanical abuse.
Equipment for repair must be returned with a Returned Materials Authorization (RMA) number visible on the
shipping package. The RMA number may be obtained via Phone, Fax, or E-Mail. Additionally, returned equipment should
be sent with a note briefly describing the nature of the defect. Equipment returned without an RMA number will receive no
attention until Selectone Customer Service has been able to contact the shipper to obtain the necessary RMA information.
For warranty service, contact Selectone Customer Service Department at (800) 227-0376, fax (510) 781-5454 or EMail at techsupport@selectone.com.
Send all repairs and returns with the associated RMA
number visible on the shipping package to:
Selectone, Inc.
3501 Breakwater Ave.
Hayward, Ca. 94545-3610
ATTN: Warranty Repair
ST-809 Component Locator
Top View
Bottom View
ST-809 Schematic Diagram
C2
+5Vdc
R1
150K
.01UF
U1
18
C1
0.1UF
C3
R2 100K
J1- 12
Rx Signal Input (GREEN)
0.1UF
+5Vdc
VDD
17
ST/GT
16
4
1
EST VREF
IN(+)
GS
6
3
R3
PD
5
INH
IN(-)
9
2
100K
R4 100K
VSS
OSC2
+5Vdc
C4
0.1UF
C5
OSC1 Q1 Q2 Q3 Q4 STD TOE
8
7
11
12
13
14
15
U3
10
7
6
Y1
5
3.58 MHz
4
3
2
RA5
Vdd
RA4
RC7
RA3
RC6
RA2
RC5
RA1
RC4
RA0
RC3
28
R5
10K
27
26
25
+5Vdc
2
8
7
6
5
DO
DI
U2
VDD
4
R7
10K
+5Vdc
0.1UF
8870
3
24
SK CS
23
ORG
22
VSS
21
93LC46
10
RB7
RC2
RB6
RC1
RB5
RC0
R8
10K
20
R9
18
330K
J1- 6
PTT Input (YELLOW)
R10 330K
J1- 7
Mon/Res Input (BROWN)
J1- 2
Call Lamp #1 Output (VIOLET)
17
16
15
14
13
R11 4.7K
12
Q1
MMBT4401
11
J1- 11
RB4
R12
10K
J1- 1
RB3
RB2
R13
J1- 13
Transpond Tone Output (WHT/GRN)
RB0
OSC2
J1- 5
OSC1
Vss
1
Alert Tone Output (WHT/BLU)
10K
RB1
R14 4.7K
9
Call Lamp #2 Output (BLUE)
MCLR
Vss
Decode Mom Output (BLK/ORG)
Q2
MMBT4401
8
19
J1- 10
Q3
PIC16C62
PTT Output (BLK/YEL)
Vin
R16 10K
R15 4.7K
DTC143T
Q4
MMBT3906
Q5
R17
4.7K
J1- 4
DTC143T
Q6
Decode Latched Output (WHT/ORG)
+5Vdc
+5Vdc
DTC143T
U4
R6
330K
Vin
5
C6
0.1UF
6
7
8
ERROR
TAP
FDBK
VIN
LP2951
VOUT
SENS
SHTDN
VSS
J1- 8
(BLK/BRN)
J1- 9
Negative (-) Supply (BLACK)
J1- 3
Positive (+) Supply (RED)
1
2
+
3
C7
2.2UF
4
C8
0.1UF
.
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertising