Selectone ST-955 Operating Instructions Manual

Operating Instructions

MODEL ST-955 OtAP Modem for

ST-050 / ST-051 / ST-052

Manual # 600-1001 March 3, 1999

[P1-5] NEGATIVE (-) SUPPLY

GENERAL

The ST-95x is an Over the Air Programming Modem for use with, ST­051, and ST-052 voice encryption devices. The ST-95x connects to a
PC running Selectone Product Manager via a Female DB9 (RS-232)
serial connection. The ST-95x also connects to the host radio or
service monitor via a Male DB9 connector. All operation is under the
control of Product Manager

Selectone “Product Manager” software, is a Windows based RS-232 or
Over the Air Programming (OtAP) package. Selectone supports this
product with application assistance Via phone at [phone], (510)
781-0376, FAX at [phone], E-Mail at
[e-mail], or on the World Wide Web at
www.selectone.com

SPECIFICATIONS

Specification Detail

Operating Voltage: 5.2 Vdc to 16.3 Vdc
Operating Current:

Standby

Usable Audio Level Rx and Tx: 25 mV p-p to 2.5 V p-p

Temp: Range: 00 C to 700 C

RS-232 Interface: Female DB9 with 6 foot PC

Host Tranceiver Interface: Male DB9 with connecting Female

<10 mAdc

Tx

<60 mAdc

connection cable & adapter

DB9 + 24” application cable.

Size: 1.25” W X 3.50” L X 0.50” H

(31.7mm X 88.9mm X 12.7mm)

OPERATION

Operation is completely under control of the Selectone Product
Manager Software. Consult the on line help menu for operational
details the probability of lost speech from an operator that speeks
immediately after PTT activation. The encryption device begins to
digitally record mic. audio immediately following user activation of the
PTT. The recorded audio is then ciphered and played back for the
transmission at the appropriate time to accommodate systems delays.
The encryption device has voice storage capacity to accommodate up
to 1.2 seconds of system delay. The actual time required for system
delay is then made up at the end of the transmission by automatically
holding the transmitter keyed until the complete voice message is sent.

CONNECTIONS

Selectone supports this product with application assistance on our
TOLL FREE at [phone] or request via E-Mail at
[e-mail]. Completed applation notes are also
posted on our web page at www.selectone.com. The ST-95x is
supplied with a 24” appliacation cable for customizing connection to
the Host Radio or Service Monitor.

[P1-1] POSITIVE (+) SUPPLY

This wire should be connected to a positive DC voltage source in the
range of +5.2Vdc to +16.3Vdc.

This wire should be connected to the negative lead of the powersupply
GND.

[P2-3] RS-232A INPUT

TD output pin of the PC RS-232 port (DB9 pin #3)(DB25 pin #3).

[P2-2 ] RS-232A OUTPUT

RD pin of the PC RS-232 port (DB9 pin #2)(DB25 pin #2).

[P1-7] TRANSMIT AUDIO OUTPUT

Transmit microphone audio signal to the host radio or service monitor.
The optimum location for connection is directly to the microphone
input.

[P1-8] RECEIVE AUDIO INPUT

The optimum location for connection is directly off the receiver detector
circuit BEFORE any audio processing circuits (de-emphasis). However
operation of any Rx audio point will generally be usable.

If not previously done for the host radio or service monitor, measure
the Tx and Rx level at the respective connection point. Inject the output
of an audio signal generator at 1KHz into The Tx audio circuit.
Measure and record the peak to peak level required to modulate the
transmitter at ½ system deviation with a 1KHz tone. Also measure the
level available for Rx while receiving a 1KHz tone at ½ system
deviation. These measurements X 2 should be used to determine the
proper setting required on the Audio TAB, of the Selectone Product
Manager.

[P1-9] PTT OUTPUT

The PTT OUTPUT manages the transmit signal to the host radio as
required OtAP Modem operation. Connect to the Radio PTT circuit

PTT operation is configured from the PTT operation block on the
Operation Tab in the Selectone Product Manager.

PTT Input

• Active low: Required programming state.
PTT Output

• Active low: Required programming state.

PROGRAMMING & ADJUSTMENTS

All adjustments, level setting and customization is accomplished with
Selectone Product Manager a PC Windows based program via the
RS-232 port of a PC. During installation of Secure Speech Modules
connected to the Selectone Program Manager via RS-232 MUST be
made at least once to facilitate serial number loging to the database.
After the original setup, any of the available models, connected to a
host PC can be programmed or used as the RF modem to reprogram
any number of additional units via Over the Air Programming (OtAP).
The PC Windows based program is fully documented with an on line
manual, accessed through the help menu. The online manual provides
advantages in that corrections and upgrades can be immediately
accessed via the Selectone Web page on the Internet.

P1

DB9 Female

1
6

{

2
7
3
8
4
9
5

To host radio
or Service
Monitor

Common connections are soldered directly at the
connector indicated on the schematic.

All wire terminations at a DB connector are covered
with shrink tube.

Program the ST-05x board as follows:
Device: ST-053
All Code Keys: 000000000000
Tx Power up Mode: Clear
Functional Rx: No selection
COS: Active Low
User Code Key Selection: Toggle
PTT Inpur & Output: Active Low
Special Function: Amp Enable
Others: Power Save
Initial Sync Delay: 775mS delay
Tx & Rx audio levels: 2000mV p-p
Internal Squelch: Not selected

J1

DB9 Male

1
6
2
7
3
8
4
9
5

BLK/ORG

RED

WHT/GRN
BLUE
BLK/YEL

Wire Lengths:

-----------------------­BLACK 4.0"

BLACK 1.7"
BROWN 1.7"
RED 2.9"
BLUE 2.9"
VIOLET 1.7"
BLK/ORG 2.9"
BLK/YEL 2.9"
BLK/BRN 1.7"
WHT/ORG 1.7"
WHT/GRN 2.9"

J1-5 COS

J1-3 (+) SUPPLY

J1-13 Tx Audio Output
J1-11 Rx Audio Input
J1-10 PTT Output

ST-053

J1-4 RS-232 OUT

J1-2 RS-232 IN

J1-7 Clear/Ciphered

J1-8 AMP ENABLE
J1-9 (-) SUPPLY

J2
DB9 Female

1

WHT/ORG

VIOLET

BROWN
BLK/BRN
BLACK

BLACK

6
2
7
3
8
4
9
5

WARRANTY POLICY

DCD
DSR
RD (Rx. Data)
RTS
TD (Tx Data)
CTS
DTR
RI
GND

{

To host PC
running Selectone
Program Manager

FNote: An Export License from United States Department of Commerce is

REQUIRED to remove the ST-050 or ST-051 beyond the boundries of the United
States of America. The ST-052 may be exported without license consideration. However
upgrade software to convert a ST-052 to an ST-051 or ST-050 requires the same licensing
consideration as the ST-050 and ST-051. Contact the Selectone Sales Department for
assistance in obtaining the necessary export documents.

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 out a replacement unit and will issue full credit,
including freight, upon the return of the defective unit(s). All prepay/C.O.D. customers must
return the defective equipment prior to exchange, otherwise the customer will be required to
prepay for the new unit(s) 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 caused 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.

For equipment to be returned to the factory for repair, you must first call and get an RMA#
from Customer Service. The RMA# must be written on the outside of the package,
otherwise receiving will reject the shipment. In addition, a note must be sent with the
packing list briefly describing the nature of the defect.

For special warranty replacement service, of if any other assistance is required, contact
Selectone Customer Service Department at [phone], FAX [phone], E-Mail

[e-mail], or on the WEB at www.selectone.com.

All repairs and returns are to be sent to:

23210 Bernhardt St.
Hayward, CA 94545

Attn: Customer Service