Instruction/ maintenance manual of the product MRC-921 Symbol Technologies
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MRC-921 MircoBase User ’ s Guide.
2 On December 1, 2000 Symbol T echnologies, I nc. completed the purchase of T elxon Corp oration. Referenc es made throughout this document to "T elxon" or "T elxon Cor poration" are be repl aced with "Symbol" or "Symbol T echnologies, Inc.
MRC -921 MicroBase User’s Guide.
MRC -921 MicroBase User’s Guide Part Number: 18467-701-01 Release Date : 4/19/95.
T elx on is a registered trademark of T elxon Corporation. The information contained in this manual is s ubject to ch ang e with out n otice . T elxon Corpo ration shall not be liable for technical or.
Contents Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 FCC state ment . . . . . . . . . . . . . . . . . . . . . . . 6 FCC regulations . . . . . . . . . . . . . . . . . . . . . . . 6 DOC statement . . . . . . . . . . . . . .
Configuri ng the MR C -921 . . . . . . . . . . . . . . . . . . . . . . . . 20 Communicating data . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Mainta ining the MR C -921 . . . . . . . . . . . . . . . . . . . . . . . . 22 Operating conditions .
Regulations 1 FCC statement This equipment has been teste d and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the Federal Communications Commission (FCC) rules.
DOC statement This digital apparatus does not exceed the Class A limits for radio nois e emiss ions from digital apparatus as outlined in the Radio Inte rference Regulations of the Canadian De partment of Communica tions (DOC) . The MRC-921 MicroBase ’ s MicroRadio is also approved for use in Canada.
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 fre quency ( RF) electrom agnetic energy em itte d by FCC r egulated equipmen t. T elx on subscribes t o the same safety standard f or the use of its pr oducts .
Disposing of nickel-cadmium batteries Nickel-cadmium batte ries contain chemically active materials that are hazardous to the environment; ther efore, they mu st be di sposed of prop erly . Neve r attempt to incinerate a nickel- cad mium battery; doing so could cause it to ex plode.
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.
Overview of the MRC -921 MicroBase 4 Figure 1 shows a typi cal MRC -921 MicroBas e system. The MRC-921 MicroBase is a communication cradle that allows a w ireless MicroRadio-base d scanner , such as the PTC-921, to communicate with a host.
Getting started 5 Unpacking the MRC -921 Any additional accessories are shipped i n separate bo xes with their own manuals. Each shipping box contains • an MRC-921 MicroBase, • a pow er pac k (if .
Supplying power to the MRC -921 Equi pme nt requ i r ed : • A 12-volt, 800-mA powe r pack T o use the uni t 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 met ers) of the MRC-921 providing 1 10 volts AC in the U.
P arts 6 Figu res 2 and 3 on the following pages show and describe the exte rnal parts of the MRC-921 MicroBase. The part listed below is inte rnal and, ther efore, is not s hown i n eith er of th e figu res. MicroRadio See Appendi x A for rad io specif ications.
1. An external antenna can be ord ered to expand the cover age of the cradle’s Micr oRadio. Covera ge incr eases f rom 50 ft (15.2 m) with a standard internal antenna to 100 ft (30.5 m) with an external antenna. 2. T his bay holds a PT C-92 1 spare b attery pack for rechargi ng.
1 . T his R J -41 s e rial port conn e cts th e MRC-921 v i a cab l e to a ho s t’s R S-232 s erial port for communication or configuration. Refer to the MRC - 9 2 1 T ech n i c al Refere n c e for configuration instructions.
Recharging battery packs 7 ! Use the MRC-921 to recharge only PT C-921 battery p acks. Follow the instructions in this section to use the MRC-921 as a battery charger . ! Recharging a cold battery pack can damage it . Allow any batte ry pack used in below-freezing tempe ratur es to wa rm up to ro om temper atur e bef ore recharg ing.
If the PTC bay was o rdered as a trickle charger , the battery pack in the P TC will take 12 to 16 hours t o charge. If the PT C bay is a trickle charger , its green LED will never light.
Connecting the MRC -921 to a host 8 The MRC-921 MicroBase can communicate with a variety of h ost devices, suc h as person al 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.
Configuring the MR C -921 9 Before the MRC-921 MicroBase can send data from t he wireless scanner (PTC-921) t o t he hos t , the cradle must be p r ope r ly c o n figu r ed for c omm u ni c ation. Specificall y , parameters such as the radio channel, baud rate, co mmunica t i on pro t ocol, an d s o on need t o be selecte d.
Communicating data 10 After t he MRC-921 has been connec t ed to the hos t and properly configured, commun ication usually follows this g eneral pa t tern: 1 . All t hree units (PTC-921, MRC-921, and hos t ) are t u r n e d o n . T he defaul t mess age is usual l y an aster i sk (*).
Maintaining the MRC -921 11 The MRC-921 is well constructed and durable; however , it is a precision ele ctronic device and must be treated as s uch. Follow t he procedures in this section to ensure reliable se rvice. Operating conditions The MRC-921 is des igned to operate in environments that are normally free of dust, dirt, and moisture.
Storing the MRC -921 • Do not store t he MRC-921 in temperatures be low − 20 degrees F ( − 29 degrees C) or above 140 degrees F (60 degrees C) . • Do not store t he MRC-921 in a damp or humid environment (over 95% noncondensing).
T roubleshooti ng 12 LEDs remain on after the power -on self test • Remove the sp are battery pack and PTC, if present, from the M RC-921. Unplug the power pack; then plug it in again. • If the LEDs remain lit, call your T elxo n service repres entat ive .
Both LEDs for the PT C are blinking • Make sure the PT C is installed correctly in its bay . • Exchange the battery pack in the P TC-921 with the spare battery pa ck. Refer to page 9 for information on disposi ng of your nickel-cadmi um battery pack.
T he green LED for the PT C never lights If the PT C bay was ordered as a trickle charger , the green LED will never light. T his is normal. • Call your T elxon se rvice representative . T he green LED for the spare battery pack never lights • Call your T elxon se rvice representative .
Appendix A Specifications Commun ication Host interfa ces DB-9 serial port: Built-i n one- or two-wa y 9-pin RS-232 po rt, up to 38.4K bps async RJ-41 s erial port: (Optional) Built-in one- or two- wa.
Depth : 3 in/7.6 cm W e ight: 10.5 oz/ .3 kg Radio T ype: MicroRadio Operatin g frequen cy: 902.5 to 92 7.5 MH z Antenna: Internal (standard) or extern al (optio nal) Range Int ernal ante nna: 35 to 50 fee t (10.7 to 15.2 meters) External antenna: 75 to 100 feet (22.
Appendix B Hardware part numbers The following table lists part numbers for ordering the MRC-921 MicroBase and accessories. Item P art number MRC- 92 1 Mi c r oBa se 17853 -001 Accessories External an.
Glossary asynchronous transmission A trans mission with variable time intervals bet ween successive data characters. In asynchronous communication, each data character is framed by start and stop bits. batt ery pack A sealed se t of rechargeable nickel-cadmium batteries used in the PTC-921 and recharged by the MRC- 921.
signals Electronic impulses that transmit data from one devic e to another . two-way communication Exchange of information be tween two devices . After each block of d ata, the receiving d evice sends a posit i ve or ne gative a cknow ledgment to the sen ding devic e.
Index A Accessories, 12 part numbe r s, 29 Ante n na S e e Ext e r n a l a n te n na S e e Inte rnal an tenna B Batte r y p ack S e e Ni c ke l - c a d mi u m batt e ry p a ck C Cables, 19, 29 Capacit.
L LE D s in t erpre t ation t able, 18 PTC, 13, 15, 24-26 remain on after power-on self tes t , 24 RF, 15 Serial, 15 spare bat t ery pack, 13, 15, 24-26 M Main t aining t he MRC-921, 22-23 Manuals par.
R Radio safe t y informa t ion, 8 specifications, 28 Recharging bat t ery packs, 17-18 Regulations DOC s t at e men t, 7 FCC regula t ions, 6 FCC statement, 6 Related publications, 10 RF LED, 15 RF li.
Te l xon Corporation/3330 W est Market Stree t, Akron, Ohio 443 34/216-867-3700/800-80 0-8001 P art No. 18467- 701-01 Printed in U.S.A..
An important point after buying a device Symbol Technologies MRC-921 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Symbol Technologies MRC-921 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Symbol Technologies MRC-921 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Symbol Technologies MRC-921 you will learn all the available features of the product, as well as information on its operation. The information that you get Symbol Technologies MRC-921 will certainly help you make a decision on the purchase.
If you already are a holder of Symbol Technologies MRC-921, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Symbol Technologies MRC-921.
However, one of the most important roles played by the user manual is to help in solving problems with Symbol Technologies MRC-921. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Symbol Technologies MRC-921 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
