MRC-921 MircoBase
User’s Guide
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MRC-921 MicroBase
User’s Guide
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MRC-921 MicroBase
User’s Guide
Part Number: 18467-701-01
Release Date: 4/19/95
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Telxon is a registered trademark of Telxon
Corporation.
The information contained in this manual is subject
to change without notice.
Telxon Corporation shall not be liable for technical or
editorial omissions or mistakes in this manual nor
shall it be liable for incidental or consequential
damages resulting from your use of the information
contained in this manual.
This manual is copyrighted. All rights are reserved.
No part of this manual may be photocopied or
reproduced in any form without the prior written
consent of Telxon.
© Copyright 1995 Telxon Corporation
All Rights Reserved.
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6
6
7
FCC statement . . . . . . . . . . . . . . . . . . . . . . .
FCC regulations . . . . . . . . . . . . . . . . . . . . . . .
DOC statement . . . . . . . . . . . . . . . . . . . . . . .
Safety information . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disposing of nickel-cadmium batteries . . . . . . . . . . .
8
9
Scope of the manual . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Document conventions . . . . . . . . . . . . . . . . . . . 10
Overview of the MRC-921 MicroBase . . . . . . . . . . . . . . . . . . . 11
Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Unpacking the MRC-921 . . . . . . . . . . . . . . . . . . 12
Supplying power to the MRC-921 . . . . . . . . . . . . . 13
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
MicroRadio . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Recharging battery packs . . . . . . . . . . . . . . . . . . . . . . . . 17
Connecting the MRC-921 to a host . . . . . . . . . . . . . . . . . . . . 19
Connecting to the host’s serial port . . . . . . . . . . . . . 19
4
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Communicating data . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Maintaining the MRC-921 . . . . . . . . . . . . . . . . . . . . . . . . 22
Handling the MRC-921 . . . . . . . . . . . . . . . . . . . 22
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
LEDs remain on after the power-on self test . . . . . . . . 24
The red LED for the spare battery pack does not light . . 24
Both LEDs for the PTC are blinking . . . . . . . . . . . . 25
Both LEDs for the spare battery pack are blinking . . . . 25
takes too long to recharge . . . . . . . . . . . . . . . . . 25
The green LED for the PTC never lights . . . . . . . . . . 26
The green LED for the spare battery pack never lights . . 26
Appendix A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . 27
Physical . . . . . . . . . . . . . . . . . . . . . . . . . 27
Appendix B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Hardware part numbers . . . . . . . . . . . . . . . . . . . 29
Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5
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Regulations
1
FCC statement
This equipment has been tested and found to comply
with the limits for a Class A digital device, pursuant
to Part 15 of the Federal Communications
Commission (FCC) rules. These limits are designed
to provide reasonable protection against harmful
interference when the equipment is operated in a
commercial environment. This equipment generates,
uses, and can radiate radio frequency energy and, if
not installed and used in accordance with this user ’s
guide, may cause harmful interference to radio
communications. Operation of this equipment in a
residential area is likely to cause harmful
interference, in which case users will be required to
correct the interference at their own expense.
The MicroRadio in the MRC-921 MicroBase
fully complies with FCC Part 15.249 limits for
intentional radiation as well as FCC Part 15.209
for unintentional emissions.
FCC regulations
The MRC-921 MicroBase uses radios (transceivers)
and radio communication in its operation. The
MRC-921 is a low-power transceiver operating under
FCC Part 15.249. No license is required for operation.
6
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DOC statement
This digital apparatus does not exceed the Class A
limits for radio noise emissions from digital
apparatus as outlined in the Radio Interference
Regulations of the Canadian Department of
Communications (DOC).
The MRC-921 MicroBase’s MicroRadio is also
approved for use in Canada. No license is required for
operation.
This device complies with RSS-210 of Industry and
Science Canada. Operation is subject to the following
two conditions: (1) this device may not cause
interference, and (2) this device must accept any
interference, including interference that may cause
undesired operation of the device.
7
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Safety information
2
Using the radio
The FCC with its action in General Docket 79-144,
March 13, 1985, has adopted a safety standard
for human exposure to radio frequency (RF)
electromagnetic energy emitted by FCC regulated
equipment. Telxon subscribes to the same safety
standard for the use of its products. Proper operation
of this radio will result in user exposure substantially
below the FCC recommended limits.
•
Do not hold any component containing a radio such
that the antenna is very close to, or touching,
exposed parts of the body, especially the face or
eyes, while transmitting. Hold such a component 6
inches (15.2 centimeters) or more from your face.
•
•
Do not allow children to play with any radio
equipment containing a transmitter.
Do not operate a portable transmitter near
unshielded electrical blasting caps or in an
explosive atmosphere unless it is a type especially
qualified for such use.
•
Do not turn on the MRC-921 MicroBase or attempt
to transmit data unless the antenna is attached; if
the antenna is not attached, the radio module may
be damaged.
8
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Disposing of nickel-cadmium batteries
Nickel-cadmium batteries contain chemically active
materials that are hazardous to the environment;
therefore, they must be disposed of properly. Never
attempt to incinerate a nickel-cadmium battery;
doing so could cause it to explode. Telxon urges you
to contact the Environmental Protection Agency, the
Department of Natural Resources, a local hazardous
waste disposal agency, or the Telxon Customer
Support Center for assistance prior to disposing of
your nickel-cadmium batteries.
9
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Scope of the manual
3
This manual provides general information on the
MRC-921 MicroBase’s parts, features, and
accessories. It also explains how to operate and
maintain the cradle.
Document conventions
Cautions
Cautions indicate potential damage to equipment.
They are set off in the left-hand columns of this
manual by the following symbol: !.
Notes provide supplementary information. They are
set off in the left-hand columns of this manual and
are not preceded by a symbol.
Related publications
Refer to Appendix B for a list of
manuals and their part numbers.
The following manuals may be helpful as you operate
the MRC-921 MicroBase:
•
•
MRC-921 Technical Reference, which contains
configuration information
PTC-921 User ’s Guide
10
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Overview of the MRC-921 MicroBase
4
Figure 1 shows a typical MRC-921
MicroBase system.
The MRC-921 MicroBase is a communication cradle
that allows a wireless MicroRadio-based scanner,
such as the PTC-921, to communicate with a host.
The cradle connects to the host’s serial port via cable
and communicates through an RS-232 asynchronous
protocol.
The MRC-921 can support one to five
PTCs, depending on the size and
frequency of transactions.
The cradle allows interactive communication between
the host and multiple PTCs. Therefore, data and
messages can be sent both to and from the host.
This unit also recharges the nickel-cadmium battery
packs that supply power for the PTC-921. Each
charger can hold a PTC-921 and a spare battery pack.
The spare battery bay contains a fast charger, which
charges spare PTC-921 battery packs in 4 hours.
The PTC bay can be ordered as either a fast or trickle
charger. A fast-charging bay charges the battery pack
in the PTC in 4 hours. A trickle-charging bay charges
the PTC’s battery pack in 12 to 16 hours.
Figure 1. A typical MRC-921 MicroBase system
RF
Cable
Host
PTC-921
MRC-921
11
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Getting started
5
Unpacking the MRC-921
Any additional accessories are
shipped in separate boxes with their
own manuals.
Each shipping box contains
•
•
•
•
•
•
•
an MRC-921 MicroBase,
a power pack (if ordered),
an external antenna (if ordered),
spare PTC-921 battery packs (if ordered),
an SC-921 and MRC-921 Instruction Sheet,
an MRC-921 MicroBase User ’s Guide, and
a Guide to Maintaining NiCd Batteries.
1. Remove the MRC-921 from the box.
2. Remove all packing material from the MRC-921.
Save the packaging in case the cradle is ever
stored or shipped to Telxon for service.
3. Check the contents of the package to make sure
you have received everything ordered.
If anything is missing or damaged,
notify your Telxon sales
representative.
4. Check the MRC-921 for shipping damage.
Connecting the external antenna (if ordered)
The MRC-921 comes with an internal
antenna. An external antenna can be
added to increase coverage.
If your MRC-921 was shipped with an external
antenna, follow these instructions to connect it to the
cradle.
1. Screw the antenna onto the antenna connector on
the MRC-921’s left side.
12
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Supplying power to the MRC-921
Eq u ip m en t r eq u ir ed :
•
•
A 12-volt, 800-mA power pack
To use the unit outside of the U.S. or
Canada, you need a power pack
designed for a 220-volt AC outlet.
An electrical outlet within 6 feet (1.8 meters) of
the MRC-921 providing 110 volts AC in the
U.S. or Canada
1. Place the MRC-921 on a flat surface in a location
where the temperature will be between 50
degrees F (10 degrees C) and 110 degrees F (43
degrees C).
2. Plug the power pack’s connector into the
MRC-921’s power connector.
3. Plug the power pack into the electrical outlet.
Running the power-on self test
When you plug in the MRC-921, it performs a series
of self-diagnostic tests to ensure it is operating
correctly. These tests are indicated by flashing
patterns of the PTC and spare battery pack
light-emitting diodes (LEDs).
Refer to the “Troubleshooting”
section on page 24 for information
on possible errors.
If the MRC-921 passes these diagnostics, all the
LEDs turn off after 10 seconds, provided the unit does
not contain a PTC or spare battery pack. If any LEDs
stay lit, the diagnostics have discovered an error.
13
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Parts
6
describe the external parts of the MRC-921
MicroBase. The part listed below is internal and,
therefore, is not shown in either of the figures.
MicroRadio
See Appendix A for radio
specifications.
This short-range radio in the MRC-921 is used to
communicate with the MicroRadio in a wireless
scanner (PTC-921).
14
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Figure 2. The MRC-921 MicroBase (front view)
1. External antenna (optional)
2. Spare battery bay
3. PTC bay
4. Spare battery pack LEDs
8. Antenna connector
7. Serial LED
5. PTC LEDs
6. RF LED
1. An external antenna can be ordered to
expand the coverage of the cradle’s
MicroRadio. Coverage increases from
50 ft (15.2 m) with a standard internal
antenna to 100 ft (30.5 m) with an
external antenna.
2. This bay holds a PTC-921 spare battery
pack for recharging. The bay fast charges
a fully discharged spare pack in 4 hours.
3. This bay holds a PTC-921 and recharges
the battery pack within it. The bay can
be ordered as a 4-hour fast charger or
as a 12- to 16-hour trickle charger.
4. These LEDs indicate the charging status of
the spare battery pack. Refer to the table
on page 18 for an explanation of the LEDs.
5. These LEDs indicate the charging status of 6. This LED glows when the MRC-921 is
the battery pack in the PTC-921. Refer to
the table on page 18 for an explanation of
the LEDs.
communicating via its MicroRadio.
7. This LED glows when the MRC-921 is
communicating via its DB-9 serial port or
optional RJ-41 serial port.
8. An external antenna screws onto this
connector to increase the MicroRadio’s
range.
15
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Figure 3. The MRC-921 MicroBase (rear view)
1. Optional RJ-41 serial port
2. DB-9 serial port
3. Power connector
4. Connect/Config button
1. This RJ-41 serial port connects the MRC-921
via cable to a host’s RS-232 serial port for
communication or configuration. Refer to
the MRC-921 Technical Reference for
configuration instructions.
2. This 9-pin serial port connects the MRC-921 3. A 12-volt, 800-mA power pack plugs
via cable to a host’s RS-232 serial port for
communication or configuration. Refer to
the MRC-921 Technical Reference for
configuration instructions.
into this connector to supply power to
the MRC-921.
4. Pressing this button upon power-up will
restore all MRC-921 configuration settings
to their default values. Refer to the MRC-921
Technical Reference for configuration
information.
16
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Recharging battery packs
7
Follow the instructions in this section to use the
MRC-921 as a battery charger.
! Use the MRC-921 to recharge only
PTC-921 battery packs.
Allow any battery pack used in below-freezing
temperatures to warm up to room temperature before
recharging.
! Recharging a cold battery pack can
damage it.
1. Insert the spare battery pack and the PTC into
their appropriate bays in the MRC-921. Insert the
spare pack so its contacts will connect with the
contacts in the spare battery bay. See Figure 4.
A battery pack that is not fully dis-
charged takes less than 4 hours to
charge.
2. The MRC-921 automatically begins charging the
battery packs. Each bay’s red LED lights. Allow
approximately 4 hours for fast charging.
Figure 4. Recharging battery packs
Battery pack contacts
17
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If the PTC bay was ordered as a trickle charger,
the battery pack in the PTC will take 12 to 16
hours to charge.
If the PTC bay is a trickle charger, its
green LED will never light. The cradle
does not indicate a full-charge state.
3. When each bay’s green LED lights, the battery
pack in that bay is charged and can be removed
and used.
Refer to the “Troubleshooting” sec-
tion on page 24 for information on
possible errors.
The following table interprets the PTC and spare
battery pack LEDs.
Status condition
Red LED
Green LED
No battery
Charging
Fully charged
Error
Off
Off
On
Off
Off
On
Blinking
Blinking
18
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Connecting the MRC-921 to a host
8
The MRC-921 MicroBase can communicate with a
variety of host devices, such as personal computers
and point-of-sale (POS) terminals. Each host can
accept data from the MRC-921 through its RS-232
serial port.
Follow the instructions in this section to connect your
MRC-921 to a host.
Connecting to the host’s serial port
1. Make sure the MRC-921’s power pack is not
plugged into an electrical outlet.
2. Turn off the host to which the MRC-921 will be
connected.
See Appendix B for a list of available
cables.
3.
Line up the 9-pin connector on the appropriate
MRC-921-to-host cable with the cradle’s DB-9
serial port.
or
Line up the RJ -41 connector on the appropriate
MRC-921-to-host cable with the cradle’s optional
RJ -41 serial port.
4. Gently press the two connectors together.
! Do not force the connectors to-
gether. You could bend the pins.
5. Connect the other end of the cable to the host’s
serial port.
Refer to page 13 for details.
6. Plug the MRC-921’s power pack into an electrical
outlet.
7. Turn on the host to which the cradle is connected.
19
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Configuring the MRC-921
9
Before the MRC-921 MicroBase can send data from
the wireless scanner (PTC-921) to the host, the cradle
must be properly configured for communication.
Specifically, parameters such as the radio channel,
baud rate, communication protocol, and so on need to
be selected.
If it has not been configured, refer
to the MRC-921 Technical Reference
for configuration information.
Check with your supervisor to verify that your
MRC-921 has been properly configured for
communication.
20
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Communicating data
10
After the MRC-921 has been connected to the host
and properly configured, communication usually
follows this general pattern:
1. All three units (PTC-921, MRC-921, and host) are
turned on.
The default message is usually an
asterisk (*).
2. The PTC-921 initiates communication with the
MRC-921. After a successful logon, a default
message displays on the PTC’s screen.
3. Data is entered (either by being scanned or typed
with the keyboard) into the PTC-921.
The data usually includes the PTC
unit ID, the data-entry type (scanned
or keyed), and the bar-code type.
4. The data is sent via the PTC-921’s MicroRadio to
the MRC-921.
5. The MRC-921 forwards the data to the host.
Refer to the MRC-921 Technical
Reference for a list of messages that
may display on the PTC’s screen.
6.
If the data is received successfully, an asterisk
displays on the PTC-921’s screen.
If the data is not received successfully, an RF link
error displays on the PTC-921’s screen.
7. Communication continues with the PTC-921
sending data to the host through the MRC-921.
21
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Maintaining the MRC-921
11
The MRC-921 is well constructed and durable;
however, it is a precision electronic device and must
be treated as such. Follow the procedures in this
section to ensure reliable service.
Operating conditions
The MRC-921 is designed to operate in environments
that are normally free of dust, dirt, and moisture. It
can be operated at temperatures between 50 degrees
F (10 degrees C) and 110 degrees F (43 degrees C).
Handling the MRC-921
•
Do not open the MRC-921. No user-serviceable
parts are inside.
•
Charge only nickel-cadmium battery packs that
have been designed for use in the PTC-921. Do not
recharge other types of rechargeable batteries or
any type of alkaline batteries.
•
•
Do not insert anything other than the specified
battery packs into the MRC-921’s spare battery bay.
If you store a battery pack in below-freezing
temperatures for more than 1 hour, do not charge
the battery pack until it warms up to room
temperature.
•
•
Protect the MRC-921 from excessive heat, cold,
moisture, and harsh, dirty environments.
Do not leave the MRC-921 where moisture can
condense on it.
22
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Storing the MRC-921
•
Do not store the MRC-921 in temperatures below
−20 degrees F (−29 degrees C) or above 140 degrees
F (60 degrees C).
•
Do not store the MRC-921 in a damp or humid
environment (over 95% noncondensing).
Pack the MRC-921 in the original packing material or
in a padded box and put it in a safe place away from
dust, dirt, humidity, and excessive heat or cold.
Cleaning the MRC-921
To clean the MRC-921, slightly moisten a soft, clean,
lint-free cloth with a mild, nonabrasive cleaner and
wipe the cradle’s outside surface.
•
•
Do not use a paper towel to clean the MRC-921.
Do not soak the cloth used to wipe the MRC-921
and do not spray or pour cleaning liquids directly
onto the cradle.
If the MRC-921 becomes extremely dirty or if liquids,
dirt, or other foreign materials get inside the case,
contact your Telxon service representative.
Servicing the MRC-921
Do not service the MRC-921. Only a trained Telxon
technician may service the cradle.
23
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Troubleshooting
12
LEDs remain on after the power-on self test
•
Remove the spare battery pack and PTC, if
present, from the MRC-921. Unplug the power
pack; then plug it in again.
•
If the LEDs remain lit, call your Telxon service
representative.
The red LED for the PTC does not light
•
Make sure the PTC is installed correctly in its bay.
•
Exchange the battery pack in the PTC-921 with
the spare battery pack.
Refer to page 9 for information on
disposing of your nickel-cadmium
battery pack.
If the red PTC LED now lights, the first battery
pack is faulty and must be discarded.
If the red LED still fails to light, call your Telxon
service representative.
The red LED for the spare battery pack does
•
Make sure the battery pack is installed correctly in
its bay.
•
Exchange the spare battery pack with the battery
pack in the PTC-921.
Refer to page 9 for information on
disposing of your nickel-cadmium
battery pack.
If the red spare battery pack LED now lights, the
spare battery pack is faulty and must be discarded.
If the red LED still fails to light, call your Telxon
service representative.
24
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Both LEDs for the PTC are blinking
•
Make sure the PTC is installed correctly in its bay.
•
Exchange the battery pack in the PTC-921 with the
spare battery pack.
Refer to page 9 for information on
disposing of your nickel-cadmium
battery pack.
If the LEDs stop blinking, the first battery pack is
faulty and must be discarded.
If both LEDs continue to blink, call your Telxon
service representative.
Both LEDs for the spare battery pack are
•
Make sure the battery pack is installed correctly in
its bay.
•
Exchange the spare battery pack with the battery
pack in the PTC-921.
Refer to page 9 for information on
disposing of your nickel-cadmium
battery pack.
If the LEDs stop blinking, the spare battery pack is
faulty and must be discarded.
If both LEDs continue to blink, call your Telxon
service representative.
The battery pack in the PTC or spare battery
bay takes too long to recharge
•
•
•
Make sure the battery pack is inserted correctly.
Clean the contacts on the battery pack.
Try another battery pack to make sure the
MRC-921 is working correctly.
•
If the battery pack still takes too long to recharge,
call your Telxon service representative.
25
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The green LED for the PTC never lights
If the PTC bay was ordered as a
trickle charger, the green LED will
never light. This is normal.
•
Call your Telxon service representative.
The green LED for the spare battery pack
never lights
•
Call your Telxon service representative.
Other problems
If you experience any other problems or difficulties
with your MRC-921 MicroBase, notify your Telxon
service representative or contact the Telxon Customer
Support Center at 1-800-800-8010.
26
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Appendix
A
Specifications
Communication
Host interfaces
DB-9 serial port:
Built-in one- or two-way 9-pin
RS-232 port, up to 38.4K bps
async
RJ -41 serial port:
(Optional) Built-in one- or two-
way RJ -41 serial port
Electrical
Charging time
Fast charger:
Trickle charger:
4 hours
12 to 16 hours
MRC-921 input
voltage requirement:
12 VDC 800 mA
Environmental
Operating
50 to 110 degrees F
(10 to 43 degrees C)
temperature:
Storage
−20 to 140 degrees F
temperature:
(−29 to 60 degrees C)
Relative humidity:
95% noncondensing
Physical
Capacity:
One PTC-921 and one spare
battery pack
Length:
Width:
6.8 in/17.3 cm
5.2 in/13.2 cm
27
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Depth:
3 in/7.6 cm
Weight:
10.5 oz/.3 kg
Radio
Type:
MicroRadio
Operating frequency:
Antenna:
902.5 to 927.5 MHz
Internal (standard) or
external (optional)
Range
Internal antenna:
35 to 50 feet
(10.7 to 15.2 meters)
75 to 100 feet
External antenna:
(22.9 to 30.5 meters)
28
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Appendix
B
Hardware part numbers
The following table lists part numbers for ordering
the MRC-921 MicroBase and accessories.
Item
Part number
MRC-921 MicroBase
17853-001
Accessor ies
External antenna
Power pack
18634-000
10142-200
Spare PTC-921 6-volt
nickel-cadmium battery pack
16880-001
Ca b les
MRC-921-to-host cable (9-pin)
MRC-921-to-host cable (RJ -41)
See *
See *
Ma n u a ls
MRC-921 Technical Reference
PTC-921 User ’s Guide
Guide to Maintaining NiCd
Batteries
19457-000
16899-000
16488-000
* Contact your Telxon representative to obtain part
numbers for these cables.
29
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Glossary
asynchronous
transmission
A transmission with variable time intervals between
successive data characters. In asynchronous
communication, each data character is framed by
start and stop bits.
battery pack
bit
A sealed set of rechargeable nickel-cadmium batteries
used in the PTC-921 and recharged by the MRC-921.
The fundamental binary unit, either a 1 (on) or a 0
(off). In ASCII code, seven bits represent one
character of data.
bps
Bits per second. A rate of electronic data transmission.
data
communication
The transport of encoded information from one device
to another.
host computer
A personal computer or mainframe that receives and
processes data from remote PTCs.
LED
Light-emitting diode. The indicator lights on the
MRC-921 are of this type.
nickel-cadmium
battery
A type of rechargeable battery used in PTC-921
battery packs.
one-way
communication
The transport of information from one device
to another without interruption. In one-way
communication, the receiving device cannot respond
directly to the sending device.
RF
Radio frequency.
RS-232
An Electronic Industries Association (EIA) standard
that defines the connector, connector pins, and signals
used to transfer data serially from one device to
another.
30
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signals
Electronic impulses that transmit data from one
device to another.
two-way
communication
Exchange of information between two devices. After
each block of data, the receiving device sends a
positive or negative acknowledgment to the sending
device.
VDC
Volts direct current. A unit of measure of electric
potential or potential difference in a unidirectional
electrical current.
31
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A
D
Accessories, 12
Data
part numbers, 29
Antenna
communicating, 21
DOC statement, 7
cautions, 10
See External antenna
See Internal antenna
notes, 10
B
Battery pack
Electrical specifications, 27
connecting, 12
C
Cables, 19, 29
Capacity, 11, 27
range, 15, 28
Charge time, 11, 15, 17-18, 27
Charging the nickel-cadmium battery
pack, 11, 17-18
time required, 11, 15, 17-18, 27
Cleaning the MRC-921, 23
Communication, 11, 21
specifications, 27
FCC regulations, 6
Configuration settings
restoring, 16
H
Configuring the MRC-921, 16, 20
Connect/Config button, 16
Connecting the MRC-921 to a host, 19
Customer Support Center
contacting, 26
Hardware part numbers, 29
Host, 11, 19, 21
I
Internal antenna, 12
range, 15, 28
32
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L
LEDs
disposing of, 9
interpretation table, 18
PTC, 13, 15, 24-26
recharging, 11, 17-18
RF, 15
Serial, 15
O
Operating conditions, 22
Overview of the MRC-921 MicroBase,
11
M
Maintaining the MRC-921, 22-23
Manuals
part numbers, 29
Messages, 11, 21
MicroRadio, 14-15
specifications, 28
MRC-921 MicroBase
capacity, 11, 27
Packing material
Part numbers, 29
Parts of the MRC-921, 14-16
Physical specifications, 27-28
Power connector, 16
Powering the MRC-921, 13
cleaning, 23
configuring, 16, 20
connecting to a host, 19
handling, 22
maintaining, 22-23
operating temperature, 13, 22, 27
overview, 11
parts, 14-16
powering, 13
servicing, 23
running, 13
Power pack, 16
Protocol, 11
PTC-921, 11, 15
inserting into the MRC-921, 17
removing from the MRC-921, 18
PTC bay, 15
specifications, 27-28
storage temperature, 23, 27
storing, 23
PTC LEDs, 13, 15
unpacking, 12
blinking, 25
MRC-921 MicroBase system, 11
green LED never lights, 26
interpretation table, 18
red LED does not light, 24
Publications, 10
33
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R
T
Radio
Temperature
safety information, 8
operating, 13, 22, 27
storage, 23, 27
Trickle charger, 11, 15, 18, 27
Troubleshooting, 24-26
specifications, 28
Recharging battery packs, 17-18
Regulations
DOC statement, 7
FCC regulations, 6
FCC statement, 6
U
RF LED, 15
Unpacking the MRC-921, 12
RF link error, 21
S
Safety information, 8-9
Scope of the manual, 10
Serial LED, 15
Serial port, 11, 15, 16, 19
connecting to, 19
Servicing the MRC-921, 23
Shipping damage, 12
Spare battery bay, 15
Spare battery pack
inserting into the MRC-921, 17
removing from the MRC-921, 18
Spare battery pack LEDs, 13, 15
blinking, 25
green LED never lights, 26
interpretation table, 18
red LED does not light, 24
Specifications
communication, 27
electrical, 27
environmental, 27
physical, 27-28
radio, 28
Storage temperature, 23, 27
Storing the MRC-921, 23
34
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Telxon Corporation/3330 West Market Street, Akron, Ohio 44334/216-867-3700/800-800-8001
Part No. 18467-701-01 Printed in U.S.A.
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