User manual RADIOSHACK PART 1 PPS 1-11

[. . . ] 57 Microprocessor (IC204) Port Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 © 2003 RadioShack Corporation All Rights Reserved. SPECIFICATIONS Frequency Coverage 25. 000-27. 995 MHz 28. 000-54. 000 MHz 108. 000-136. 9875 MHz 137. 000-150. 775 MHz 150. 7825-150. 8125 MHz 150. 815-154. 4525 MHz 154. 45625-154. 47875 MHz 154. 4825-154. 505 MHz 154. 510-154. 525 MHz 154. 5275-154. 54625 MHz 154. 5475-154. 6075 MHz 154. 610-154. 655 MHz 154. 6575-156. 2475 MHz 156. 250-157. 475 MHz 157. 4775-161. 565 MHz 161. 570-173. 200 MHz 173. 20375-173. 2225 MHz 173. 225-173. 3875 MHz 173. 390-173. 415 MHz 173. 420-174. 000 MHz 216. 0025-221. 9975 MHz 222. 000-225. 000 MHz 406. 000-512. 000 MHz 806. 000-823. 9875 MHz 849. 000-868. 9875 MHz 894. 000-960. 000 MHz 1240. 000-1300. 000 MHz 5 kHz steps (AM) 5 kHz steps (FM) 12. 5 kHz steps (AM) 5 kHz steps (FM) 7. 5 kHz steps (FM) 7. 5 kHz steps (FM) 7. 5 kHz steps (FM) 7. 5 kHz steps (FM) 5 kHz steps (FM) 6. 25 kHz steps (FM) 7. 5 kHz steps (FM) 5 kHz steps (FM) 7. 5 kHz steps (FM) 5 kHz steps (FM) 7. 5 kHz steps (FM) 5 kHz steps (FM) 6. 25 kHz steps (FM) 6. 25 kHz steps (FM) 6. 25 kHz steps (FM) 5 kHz steps (FM) 5 kHz steps (FM) 5 kHz steps (FM) 6. 25 kHz steps (FM) 6. 25 kHz steps (FM) 6. 25 kHz steps (FM) 6. 25 kHz steps (FM) 6. 25 kHz steps (FM) Unit Sensitivity FM: (S+N)/N=20 dB Dev. : 3 kHz at 1 kHz 25-54 MHz 108-136. 9875 MHz 137-225 MHz 406-512 MHz 806-960 MHz 1240-1300 MHz AM: (S+N)/N=20 dB Mod. : 60% at 1 kHz 25-54 MHz 108-136. 9875 MHz 137-225 MHz 406-512 MHz 806-960 MHz 1240-1300 MHz µV µV µV µV µV µV µV µV µV µV µV µV 0. 1 0. 3 0. 5 0. 5 0. 7 0. 7 1 1 1. 5 2 2 3 1 1 2 2 3 4 3 3 5 6 6 12 Niminal Limit 2 Unit Data decode sensitivity CT DC ED MO (Voice Channel) MO (Control Channel) WX Alert 1050 Hz tone WX Digital Weather Alert Squelch sensitivity at threshold at tight (FM) at tight (AM) Spurious refection (Except Primary image) at 174 MHz Acceptable radio frequency displacement (EIA RS-204D) Signal to noise ratio (FM and AM) RF input: 100 µV Dev. 3 kHz at 1 kHz Mod. : 60% at 1 kHz 25-54 MHz 108-136. 9875 MHz 137-225 MHz 406-512 MHz 806-960 MHz 1240-1300 MHz Residual noise Scanning rate Search rate Scan delay time Audio output power 10% THD Squelched Current drain (using AC or DC adapter) Channels of operation Channels, frequency, and mode display Receiving system Direct key entry digital-controlled synthesizer, 1st IF: 380. 72750-380. 86875 MHz 2nd IF: 21. 4 MHz 3rd IF: 455 kHz Power source Jacks Dimensions (HWD) Weight 6V DC negative ground only 4AA batteries or a suitable adapter Antenna, earphone, PC/IF, and external power 6 3/16 x 2 7/16 x 1 3/4 inches (157 x 62 x 41 mm) apporox. [. . . ] Test Instrument Connection Connect DC SSVM to TP2. Select channel 000 and adjust L22 to 18. 0 volts on the DC SSVM. Select channel 001 and be sure the DC SSVM reads 2. 0-5. 0 volts. (No adjustments are necessary for the coil. ) See Table 2. PLL1 VCO2 Alignment Control Setting OFF/VOLUME control: ON. Test Instrument Connection Connect DC SSVM to TP2. Select channel 002 and adjust L27 to 20. 0 volts on the DC SSVM. Select channel 003 and be sure the DC SSVM reads 1. 0-4. 0 volts. (No adjustments are necessary for the coil. ) See Table 2. Channel 000 001 002 003 004 Frequency 960. 000 MHz 25. 000 MHz 1300. 000 MHz 216. 0025 MHz 512. 000 MHz Voltage 17. 0-19. 0 volts at TP2 2. 0-5. 0 volts at TP2 19. 0-21. 0 volts at TP2 1. 0-4. 0 volts at TP2 1. 8-2. 2 volts at TP3 DC SSVM Table 2 DC SSVM Unit Under Test TP3 Unit Under Test TP2 Figure 1 6 Figure 2 Adjustment of Coils L22, L23, and L27 Use non-metallic tuning tool Each coil should be adjusted carefully by changing the pitch of the coil little by little using a nonmetallic tuning tool as shown in Figure 3. Increase the pitch of the coil when the measured voltage at TP2 or TP3 is higher than the voltage listed in Table 2 for the PLL2 VCO alignment, PLL1 VCO1 alignment, and PLL1 VCO2 alignment. Decrease the pitch of the coil when the measured voltage at TP2 or TP3 is lower than the voltage listed in Table 2 for the PLL2 VCO alignment, PLL1 VCO1 alignment, and PLL1 VCO2 alignment. Coil PCB Notes: Figure 3 l Be very careful when doing coil pitch adjustment because it greatly affects the frequency. l Secure the coil with glue after alignment. Be sure the glue is dry and the coil is secured. Also, be sure that the environmental temperature is normal. Then, repeat VCO (PLL2 and PLL1) alignments on Page 6. Table 3 455 kHz FM Discriminator Coil Alignment Control Setting OFF/VOLUME control: ON. Test Instrument Connection Connect the signal generator to the ANT jack and the DC SSVM to TP4. Adjust T2 Result Set the signal generator freuqency to 154. 610 MHz, 100 uV output (no modulation) and adjust T2 for 1. 3 +/- 0. 05 volts on the DC SSVM. DC SSVM ANT. Jack FM Signal Generator Unit Under Test TP4 Figure 4 1st IF (380. 8 MHz) Coil Alignment Control Setting OFF/VOLUME control: ON. Test Instrument Connection Connect the signal generator to the ANT jack and the oscilloscope and an 8-ohm dummy load to the headphone jack. Set the signal generator freuqency to 124 MHz, AM: 60% modulation at 1 kHz and RF output under 1 uV. Adjust T1 for maximum sensitivity. Oscilloscope ANT. Jack AM Signal Generator Unit Under Test Headphone Jack 8ohm Figure 5 7 3rd Local Alignment Note: You must adjust Reference Frequency Osc. [. . . ] Then press 5. The scanner shows EEPROM Test Erase Memory ENTER if YES CL to EXIT. Then press ENTER. The scanner shows EEPROM TEST Mode and automatically starts the EEPROM test program. When the scanner shows EEPROM OK!, this scanner's EEPROM have no problem. Turn off the scanner. Note: This procedure (EEPROM check program) clears all information you stored in the scanner's working memory. [. . . ]