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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..
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