Dantel 49013 User manual

CAUTION
•Install or remove modules from the shelf only when the power is off.
If you install a module in the shelf with the power on, the internal
circuitry may suffer damage and the product warranty will be void.
•Remove and install circuit boards only in a static-safe environment
(use antistatic wrist straps, smocks, footwear, etc.).
•Keep circuit boards in their antistatic bags when they are not in use.
•Do not ship or store circuit boards near strong electrostatic, electromag-
netic, magnetic, or radioactive fields.
•For more complete information on electrostatic discharge safety
precautions, refer to BellcoreTM Technical Reference # TR-NWT-000870.
Copyright 1997 by Dantel, Inc. • Dantel is a registered trademark of Dantel, Inc. • ISO 9001 Registered
Printed in the U.S.A.
INSTALLATION & OPERATION MANUAL
49013-1297 <90-00034>
49013
202 TONE MODEM
SUBASSEMBLY
About this Practice:
This practice has been reissued to:
• Incorporate the Checkout Proce-
dure into the Installation section.
• Document change to B12 version.
• Add microcontroller to Circuit
Description section.
• Update Figs. 1, 2, and Technical
Specifications table.
Issue date: December 1997
Reissued Practices: Updated and
new content can be identified by a
banner in the right margin.
UPDATED
Table of Contents
Ordering Information ........................................................................... 2
General Description.............................................................................. 2
Circuit Description ............................................................................... 2
Installation............................................................................................ 5
Operation .............................................................................................. 9
Technical Specifications ....................................................................... 9
Warranty ............................................................................................. 10
B12-49013-00
T
E
S
T
RCV
XMT
XMT
LVL
TONE
MODEM
CD

PAGE 2 49013-1297 <90-00034>
ORDERING INFORMATION
NOTE: This section lists the different options available for this product. To order any of the avail-
able options, contact Dantel Inside Sales through our toll-free number, 1-800-432-6835.
OPTION NUMBER FEATURES
B12-49013-00 202 Tone Modem Subassembly
GENERAL DESCRIPTION
The Dantel 49013 202 Tone Modem Subassembly is used in support of Dantel’s 460 Alarm and Control System. It con-
verts digital data into frequency shifted tones and enters it into
a data transmission system.
It also receives frequency shifted tones from a transmission
system and converts them into digital data. It operates as a Bell
202 full-duplex modem at a data rate of 1200 baud.
CIRCUIT DESCRIPTION
The 49013 202 Tone Modem Subassembly functional sche- matic is shown in Fig. 1. The subassembly consists of:
♦Transmit (TX) transformer
♦Receive (RX) transformer
♦Signal level pads
♦Input/output buffers
♦An FSK modem IC
♦A Microcontroller 87C51
♦A frequency control crystal
♦Front panel test switch
♦An LED driver
♦Input power protection
UPDATEDUPDATED

49013-1297 <90-00034> PAGE 3
Input
Input (RX) to the subassembly appears at pins 2 and 4 on
connector P5.
The incoming signal passes the RX transformer (600/600 ohm), a
selectable pad (0 or -20 dB) is buffered by and then applied
through an integrated circuit to the RXD, CTS (Clear To Send),
and DCD (Data Carrier Detect) outputs.
The LED CD on the front panel lights to indicate that there is
carrier detection.
Monitor the input signal at the front panel through the line side
RCV test points.
Output
Output (TX) from the subassembly is at pins 3 and 5 on connec-
tor P5.
The data output signal is introduced at DTR (Data Terminal
Ready), RTS (Request To Send), and TXD.
The signal is routed through an integrated circuit to feed a
buffer that passes the signal to a selectable pad (0 or -20 dB) and
the coupling transformer.
To adjust the output signal level from -1 to -40 dBm, use the
potentiometer, XMT LVL (R9) on the front panel.
Monitor the output signal at the front panel through the XMT
test points.
FSK Modem IC
This integrated circuit is the central component of the 49013
subassembly. It handles all data functions such as modulation,
demodulation, and filtering. Internal clocking is controlled by
an externally connected crystal for stability.
87C51 Microcontroller
This integrated circuit is used to initialize and control the
modem chip.
Front panel test switch
This switch (TEST) grounds the RTS lead, causing data carrier
transmission.
It is used to turn on the DCD (Data Carrier Detect) of the
opposing (distant end) of the modem. As a result, each of the
modems is used to verify the presence of the data carrier. This
allows level adjustment without the presence of data.
Switch S2
Switch S2 reverses the RXD, DCD, RTS, and TXD leads.
CIRCUIT DESCRIPTION
UPDATED

PAGE 4 49013-1297 <90-00034>
CIRCUIT DESCRIPTION
UPDATED
600 OHM P5-4
BALANCED P5-2
GROUND P5-1
-12 VDC P5-13
DIST. RCV P4-2
DIST. XMT P4-4
+5 VDC P4-3
600 OHM P5-5
BALANCED P5-3
OUTPUT
INPUT
U2
RCV
MAS
A
Functional
Schematic
Part I
(Analog)
To/From
Functional
Schematic
Part II
REG -5 VDC
RCV
RCV
XMT
XMT
XMT PAD
OUT
OUT
IN IN
XMT
MAS
SLA
SLA
RCV PAD
OUT
OUT
IN IN
Functional
Schematic
Part II
(Digital)
To/From
Functional
Schematic
Part I
U1
+5V
CD
+5V
+5V
GND
1
3
4
6
9
7
12
10
2
5
8
11
S2
P5-6
P5-7
P5-8
P5-12
P5-10
/TXD(-00)
/RXD(-01)
/RTS(-00)
/CD(-01)
/RXD(-00)
/TXD(-01)
/CD(-00)
/RTS(-01)
/DSR
/CTS P5-11
/DTR
A
P5- 9
P4-3
P5-1
TEST S1
-01
-00 U2
FIG. 1 - FUNCTIONAL SCHEMATIC, 49013

49013-1297 <90-00034> PAGE 5
INSTALLATION
Follow these steps to install the 49013 202 Tone Modem Subassembly:
1. Switch and Straps
Refer to Table A and Fig. 2 for the proper switch and strap
options. Set the switches and straps for the options you want.
FIG. 2 - SWITCH AND STRAP LOCATION, 49013
TABLE A - STRAP OPTIONS
OPTION
MODE
Master Modem in Master/Slave system
Slave Modem in Master/Slave system
Single Modem (no Master/Slave) Store straps in
non-operative position or remove.
RCV PAD
RCV Pad IN (input level between 0 and -20 dBm)
RCV Pad OUT (input level between -20 and -40 dBm)
XMT PAD
XMT Pad IN (output adjustable from -20 to -40 dBm)
XMT Pad OUT (output adjustable from -1 to -20 dBm)
INSTALL STRAP
XMT MAS and RCV MAS
XMT SLA and RCV SLA
XMT and RCV open (no straps)
Jumpers parallel to P5 (See Fig. 2)
Jumpers perpendicular to P5 (See Fig. 2)
Jumpers parallel to P5 (See Fig. 2)
Jumpers perpendicular to P5 (See Fig. 2)
Note: Switch S2 reverses the TXD, RXD, DCD, and RTS leads. Refer
to Fig. 3.
CONTINUED . . .
UPDATED
NOR
RCV
S2
113 P5
1
4
P4
MAS SLA
XMT RCV
MAS SLA
OUT
IN IN
U2
U1
1. XMT OUT, RCV IN
2. XMT OUT, RCV OUT
3. XMT IN, RCV IN
4. XMT IN, RCV OUT
-00
-01
**
Reset, Factory use only.

PAGE 6 49013-1297 <90-00034>
FIG. 3 - PIN CONNECTOR DESIGNATIONS, 49013
2. Install in System
If it is necessary to install the subassembly on a host module,
refer to the documentation on the host module for the location of
the subassembly and follow these steps:
♦Remove the hole plug from the host module’s front panel.
♦Remove the screws from the three standoffs for the subas-
sembly.
♦If a subassembly is already installed, remove it.
♦To place the 49013 subassembly, insert P4 and P5 into the
connectors on the host module (see Fig. 2).
♦Make sure each connector pin goes straight into the socket.
♦Make sure the subassembly fits tightly on the standoffs and
the front panel is straight in the host module’s front panel
opening.
♦Replace the three screws in the standoffs.
INSTALLATION
CONTINUED . . .
J4/P4 J5/P5
DIST
RCV
+5 VDC
DIST
XMT
2
3
4
S2 UP
(NORMAL)
49013-00
TONE MODEM
SUBASSEMBLY
HOST MODULE
1
2
3
4
5
6
7
8
9
10
11
12
13
GROUND
RCV
XMT
RCV
XMT
DSR
RTS
RXD
DTR
TXD
CTS
DCD
-12 VDC
J4/P4 J5/P5
DIST
RCV
+5 VDC
DIST
XMT
2
3
4
S2 DOWN
(REVERSED)
49013-00
TONE MODEM
SUBASSEMBLY
HOST MODULE
1
2
3
4
5
6
12
10
9
8
11
7
13
GROUND
RCV
XMT
RCV
XMT
DSR
RTS
RXD
DTR
TXD
CTS
DCD
-12 VDC

49013-1297 <90-00034> PAGE 7
3. Checkout
Before you can check the operation of the 49013 202 Tone
Modem Subassembly, you must first mount it on a host module
and install it in a system. The modem must be connected to
another modem at the other end of the communications line.
1. Apply power to the host modules with modems installed.
2. Place the front panel switch in the TEST position.
3. Verify that the front panel CD (Carrier Detect) LED at the distant
end indicates data transmission activity.
4. With a dB meter (bridging), check the signal level at the XMT test
points.
5. Adjust the XMT LVL to obtain the level required for the applica-
tion.
6. When receiving data, check the incoming signal level at the RCV
test points on the front panel with a dB meter (bridging). The sig-
nal level should be 0 to -40 dBm, depending on the application.
There is no field adjustment for this circuit.
Master/Slave Mode
When using the 49013 subassemblies in the Master/Slave mode
of operation, use the following procedure to align the XMT
levels. Refer to Fig. 4.
1. Set the 600 ohm dB meter for bridging and connect the meter to
the XMT jacks of the 49013 subassembly that is operating as the
master (location 1).
The meter should remain connected at this location for the entire
alignment procedure.
♦Turn the test switch ON and set the system level as required.
♦When the XMT level of the master is set, turn the test switch
OFF.
NOTE: To ensure proper settings of the levels, terminate the XMT line
(pins 53 and 54 on the master) with 600 ohms when performing
this alignment.
2. Proceed to location 2 (in the same equipment rack) and turn the
test switch ON.
3. Adjust the XMT level at the slave front panel for the required sys-
tem level (as measured by the master).
INSTALLATION
UPDATED
CONTINUED . . .

PAGE 8 49013-1297 <90-00034>
INSTALLATION
4. Repeat steps 2 and 3 for the other slave locations.
5. After all slaves have been aligned, remove the level meter.
This completes the alignment procedure.
NOTE: Do not check the XMT levels at the slave location. These will be
9 dB below the system level when terminated at the slave XMT
test jacks. Using the slave XMT test points to try and set the
same level as the master will magnify and distort the signal
above a maximum level of -1 dB.
FIG. 4 - 49013 MODEMS IN MASTER/SLAVE OPERATION
UPDATED
LOCATION 1
46010
MULTIPLE
ALARM
TRANSMITTER
49013-00
202
MODEM
(MASTER)
P4-2
P4-4
53
54
55
56
36 RCV
18 XMT
600 OHM
BALANCED OUTPUT
600 OHM
BALANCED INPUT
16
ALARM
POINT
INPUTS 202
TONES
LOCATION 2
LOCATION 3
46010
MULTIPLE
ALARM
TRANSMITTER
49013-00
202
MODEM
(SLAVE)
P4-2
P4-4
16
ALARM
POINT
INPUTS
36 RCV
18 XMT
46010
MULTIPLE
ALARM
TRANSMITTER
49013-00
202
MODEM
(SLAVE)
P4-2
P4-4
36 RCV
18 XMT
16
ALARM
POINT
INPUTS

49013-1297 <90-00034> PAGE 9
OPERATION
TECHNICAL SPECIFICATIONS
The 49013 202 Tone Modem Subassembly starts normal operation as soon as power is applied by way of the host
module. Place the front panel switch in the TEST position as
required to verify that the data transmission circuits are func-
tioning.
The green LED labeled CD (Carrier Detect) on the front panel of
the 49013 indicates that received data carrier is active.
DESCRIPTION
Input Voltage
Nominal Current
(Add to host module’s specs)
Heat Dissipation
(Add to host module’s specs)
Data Rate
Input Level Range
Output Level Range
Operating Frequencies
Mark
Space
Operating Temperature Range
Physical Dimensions
Weight
VALUE
-12 and +5 VDC (from host module)
11 mA @ -24 VDC
6 mA @ -48 VDC
0.99 Btu/Hr @ -24 VDC
0.98 Btu/Hr @ -48 VDC
1200 baud
0 to -20 dBm/ -20 to -40 dBm
-1 to -20 dBm/ -20 to -40 dBm
1200 Hz
2200 Hz
0° to 55° C.
2.6" x 2.8" x 0.8"
1.75 ounces
UPDATED

PAGE 10
10 PAGES 49013-1297 <90-00034>
LIMITED WARRANTY
The Seller warrants that the standard hardware products sold will be free from defects in material and work-
manship and perform to the Seller’s applicable published specifications for a period of 18 months for hardware,
and 3 months for software, from the date of the original invoice. The liability of the Seller hereunder shall be
limited to replacing or repairing, at its option, any defective products which are returned F.O.B. to the Seller’s
plant, (or, at the Seller’s option, refunding the purchase price of such products). In no case are products to be
returned without first obtaining permission and a customer return authorization number from the Seller. In
no event shall the Seller be liable for any consequential or incidental damages.
Equipment or parts which have been subject to abuse, misuse, accident, alteration, neglect, unauthorized
repair or installation are not covered by warranty. The Seller shall make the final determination as to the
existence and cause of any alleged defect. No warranty is made with respect to custom equipment or products
produced to the Buyer’s specifications except as specifically stated in writing by the Seller in the contract for
such custom equipment.
This warranty is the only warranty made by the Seller with respect to the goods delivered hereunder, and may
be modified or amended only by a written instrument signed by a duly authorized officer of the Seller and
accepted by the Buyer.
Warranty and remedies on products not manufactured by the Seller are in accordance with warranty of the
respective manufacturer. THE SELLER MAKES NO OTHER WARRANTY OF ANY KIND WHATSOEVER,
EXPRESSED OR IMPLIED; AND ALL IMPLIED WARRANTY OF FITNESS FOR A PARTICULAR PUR-
POSE WHICH EXCEEDS THE AFORESAID OBLIGATIONS IS HEREBY DISCLAIMED BY THE SELLER.
INCASE OF DIFFICULTY
If you experience difficulty with this equipment, check the following, as appropriate:
1. Switch settings
2. Signal levels
3. Software configuration
4. Connections between Dantel’s equipment and your equipment.
If there is still a problem, substitute equipment that is known to be good. For additional assistance, call
Dantel’s Technical Field Service Department weekdays, 6 A.M. to 5 P.M. pacific time:
1-800-4DANTEL(1-800-432-6835).
If a thorough checkout shows a piece of equipment has malfunctioned, you may return it to the factory. For
repairs and emergency replacements, obtain a Return Material Authorization (RMA) number from the Cus-
tomer Service Representative at 1-800-4DANTEL (1-800-432-6835).
To ensure expedient processing of your order, provide a purchase order number and shipping and billing
information when requesting an RMA number. Also, when the units are returned to Dantel, include a descrip-
tion of the failure symptoms for each unit returned. Send defective equipment to:
Dantel, Inc. • 2991 North Argyle Avenue • Fresno, California 93727-1388
P.O. Box 55013 • Fresno, CA 93747-5013 Phone [phone] Fax [phone] http://www.dantel.com
WARRANTY