Évaluations - 3, GPA: 4 ( )

Fabricant : Kenwood Taille : 3.49 mb Nom Fichier : TH-45.pdf Langue d'enseignement:

TH-25A :144 MHz FM transceiver without DTMF Pad. TH-25E :144 MHz FM transceiver with Tone. (with Tone Burst for U.K. version) TH-45AT :430/440 MHz FM transceiver with DTMF Pad. TH-45A :430/440 MHz FM transceiver without DTMF Pad. TH-45E :430 MHz FM transceiver with tone. (with Tone Burst for U.K. version) TH-55AT :1200 MHz FM transceiver with DTMF Pad. TH-55E :1200 MHz FM transceiver with Tone. (with Tone Burst for U.K. version) Under normal circumstances, the transceiver will operate in accordance with these operating instructions. The transceiver has been adjusted at the factory and should only be readjusted by a qualified technician with proper test equipment. Attempting service or alignment without factory authorization can void the transceiver's warranty. CAUTION:- Long transmission or extended operation in the HI power mode might cause the rear of this transceiver to get warm. Do not place the transceiver where the heat sink (rear panel) might come in contact with plastic or vinyl surfaces. Use of an external antenna for fixed station is recommended. Illustrations show the TH-25A. CONTENTS 1. SPECIFICATIONS and ACCESSORIES..................... 4 2. BATTERY PACK.................................................. 6 3. OPERATION OPERATING CONTROLS...................................... 8 RECEIVER OPERATION.........................................12 TRANSMITTER OPERATION MEMORY...........................................................13 AUTOMATIC MEMORY INITIALIZATION MEMORY ENTRY MEMORY SHIFT..............................................14 MEMORY RECALL ODD SPLIT MEMORY CHANNEL LOCKOUT.........................15 CLEARING ALL MEMORY.................................16 MEMORY BACK-UP BATTERY SCAN REPEATER OPERATION....................................17 TRANSMITTER OFFSETS REVERSE FUNCTION TONE OPERATION AUTOPATCH.............................................19 BEEP TONE TONE ALERT SYSTEM.....................................20 BATTERY SAVER AUTOMATIC POWER OFF BATTERY SAVER and AUTOMATIC POWER OFF function CANCEL (TH-55AT/55E only) 4. BLOCK DIAGRAM and SCHEMATIC DIAGRAM........................Another sheet 5. MAINTENANCE..................................................22 IN CASE OF DIFFICULTY..................................23 6. OPTIONAL ACCESSORIES.........................Back cover 3 1. SPECIFICATIONS and ACCESSORIES 1-1 SPECIFICATIONS ■ GENERAL TH-25A/25AT/25E 2 m Band TH-45A/45AT/45E 70 cm Band TH-55AT/55E 23 cm Band FREQUENCY RANGE (MHz) U.S.A.version 144.000^147.995 440.000-^449.995 1258.000^1300.000 European and U.K. version 144.000^145.995 430.000'v439.995 1258.000^1300.000 Others 144.000^147.995 430.000^39.995 1258.000^1300.000 MODE F3E (FM) MEMORY CHANNELS 14 FREQUENCY STEP (kHz) TH-25A/25AT TH-25E TH-45A/45AT TH-45E 25, 12.5 5, 10 12.5, 5 25, 5 12.5, 5 ANTENNA IMPEDANCE (0) 50 POWER REQUIREMENT 6^16 (7.2 VDC nominal) CURRENT DRAIN HI 12 V (with PB-8 or DC-1) Less than 1.2 A Less than 1.8 A Less than 1.0 A 9 V (with BT-6) Approx. 0.9 A Approx. 1.4 A Less than 1.0 A 7.2 V (with PB-5/6/7/9) Approx. 0.8 A Approx. 1.1 A Approx. 0.8 A LO transmit mode Less than 0.4 A Less than 0.6 A Less than 0.6 A RECEIVE mode with no signal Approx. 55 mA Approx. 60 mA Approx. 60 mA BATTERY SAVER mode Approx. 16 mA Approx. 17 mA Approx. 17 mA AUTOMATIC POWER OFF mode Approx. 6 mA Approx. 5 mA FREQUENCY STABILITY (-10°C~ +60°C) ±3 ppm GROUND Negative DIMENSIONS (WxHxD) Projections not included (mm) 58x137.5x29.5 (2.3x 5.4x1.2 inch) 58x 157.5x29.5 Projections included (mm) A/E 68.5x 152.0x34.5 (2.7x6.0x 1.35 inch) 68.5x 172x37.5 (2.7x7.0x 1.5 inch) AT 68.5x152.0x35.5 (2.7x6.0x1.4 inch) WEIGHT (g) With NiCd Battery and Antenna 400 (0.88 lbs.) 450 (0.99 lbs) OPERATING TEMPERATURE — 20°C —t-50°C(—4°F~122°F) MICROPHONE IMPEDANCE 2 kii ■ TRANSMITTER OUTPUT POWER HI 12 V (with PB-8 or DC-1) More than 5 W 1 W 9 V (with BT-6) Approx. 3.5 W Approx. 3.5 W 1 W 7.2 V (with PB-5/6/7/9) Approx. 2.5 W Approx. 2 W Approx. 0.8 W 4 OUTPUT POWER LO Approx. 0.5 W Approx. 0.1 W MODULATION REACTANCE MAXIMUM FREQUENCY DEVIATION (kHz) ±5 SPURIOUS RADIATION Less than —60 dB Less than — 50 dB DUTY CYCLE OPERATION 1 minute transmission 3 minutes reception recommended ■ RECEIVER CIRCUITRY DOUBLE CONVERSION SUPERHETERODYNE INTERMEDIATE FREQUENCY 1st IF (MHz) 16.9 30.825 59.7 2nd IF (kHz) 455 SENSITIVITY 1 2 dB SINAD Less than 0.16 /¿V Less than 0.18 /¿V Less than 0.25 ¿tV SQUELCH SENSITIVITY Less than 0.1 /¿V Less than 0.16 /¿V SELECTIVITY -6 dB More than 1 2 kHz -40 dB Less than 28 kHz Less than 32 kHz RIT variable range More than ± 5 kHz AUDIO OUTPUT POWER (across 8 fl load 10% distortion) More than 200 mW Note: Circuit and ratings are subject to change without notice...

Téléchargez votre

Pour télécharger, entrez 2 chiffres :