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AOR AR-2002 - User Manual

AOR AR-2002
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AR2002 operating manual - 1
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Summary

1. Major features

2. Operating precautions

3. Caution for proper handling of the set

4. Control

5. Rear Panel Control

6. Operation

Scanning

Describes how to scan frequencies and use the SCAN key.

SEARCH Function

Explains the AR-2002's search capability for frequencies and steps.

LOCK OUT Feature

Details how to program memory channels for scan exclusion using the LOCK OUT key.

Main Tuning Knob Operation

Explains manual frequency selection using the main tuning knob.

PRIORITY Channel Monitoring

Describes setting and using a priority channel for monitoring.

DELAY Function for Scanning

Explains the DELAY key for resuming scanning after transmission pauses.

Clock and Time Display

Instructions for displaying and setting the 24-hour clock.

7. Specifications

8. Optional accessories

9. Trouble shooting

Overview

  1. Key Features
  2. Technical Specifications
  3. Usage Features
  4. Front Panel Controls
  5. Rear Panel Controls
  6. Operation Procedures
  7. Storing Frequencies
  8. Recalling Memory Channels
  9. Memory Back-up
  10. Scanning
  11. Searching
  12. LOCK OUT
  13. Main Tuning Knob
  14. PRIORITY
  15. DELAY
  16. Time Display and Setting
  17. Maintenance Features
  18. Optional Accessories

The AOR AR-2002 is a communications receiver designed for wide-range reception, offering continuous coverage from 25MHz to 550MHz and from 800MHz to 1300MHz. It utilizes a PLL synthesizer circuit for accurate receiving frequency. The device is equipped with a multi-functional LCD display that shows receiving frequency, scan status, mode, search status, and other relevant information.

Key Features:

  • Frequency Coverage: 25MHz to 550MHz and 800MHz to 1300MHz.
  • PLL Synthesizer: Ensures precise frequency tuning.
  • LCD Display: Provides comprehensive information on receiver status.
  • Keyboard Operation: A new keyboard with push buttons simplifies frequency entry and receiver operation.
  • Professional Performance: Offers high receiver sensitivity, selectivity, spurious rejection, and two-signal characteristics.
  • Multiple Receiving Modes: Supports Wide FM (for TV and FM broadcasts), Narrow FM (for business band and amateur radio), and AM (for VHF/UHF air band and CB).
  • Advanced Design: Incorporates state-of-the-art electronic components and circuitry.
  • Portability: Light and compact design for versatile use.
  • S-Meter: Features a 10-step LED "S" meter on the front panel.
  • Frequency Control: Manual frequency control is available via a shaft encoder, in addition to UP/DOWN buttons.
  • RS232 Interface: Includes a socket on the rear panel for an optional RS232 interface board, enabling remote control.

Technical Specifications:

  • Receiving Frequency: 25-550 MHz, 800-1300 MHz.
  • Receiving Sensitivity (12 dB SINAD):
    • Narrow FM: 0.3uV
    • Wide FM: 1.0uV
    • AM (10 dB S/N): 0.5uV
  • Receiving Selectivity:
    • NFM: +/-7.5 kHz @ 6 dB, +/-20 kHz @ 70 dB
    • WFM: +/-50 kHz @ 6 dB, +/-250 kHz @ 60 dB
    • AM: +/-5 kHz @ 6 dB, +/-10 kHz @ 70 dB
  • Image and Spurious Rejection: -50 dB.
  • Memory Channels: 20 channels.
  • Intermodulation: -50 dB.
  • Receiver Circuitry: PLL Synthesizer.
  • Scanning Rate: 5 channels/sec.
  • Searching Rate: 1 MHz/6 sec.
  • Audio Output: 1 Watt at 10% distortion.
  • Power Requirements: 12-14 V DC.
  • Method of Display: LCD.
  • Dimensions: 138 x 80 x 200 mm.
  • Weight: 1.2 Kg.

Usage Features:

The AR-2002 is designed for ease of operation. It requires a 12V DC power supply, with a regulated AC power supply recommended for home use. Proper connection of positive and negative terminals is crucial.

Front Panel Controls:

  • POWER: Power switch.
  • SQL: Squelch control.
  • VOL: Volume control.
  • Earphone Jack: For private listening.
  • SIGNAL: Signal strength meter.
  • KEY LOCK: Locks keyboard operation when the indicator lamp is on.
  • Numeric Keys (1-9): Used for inputting numeral information like frequency and time.
  • LCD: Displays frequency, channel number, and other information.
  • DOWN/UP: Shifts to lower/higher frequencies.
  • CLK SET: Sets the clock time.
  • Frequency Spacing Keys (5 kHz, 12.5 kHz, 25 kHz): Selects frequency spacing for search operations.
  • AM/WFM/NFM: Selects AM, Wide FM, or Narrow FM reception modes.
  • ENTER: Entry key for frequency, channel, and time input.
  • DELAY: Holds frequency for a short time after a signal stops during scanning.
  • SPEED: Selects scan/search speed.
  • SEARCH: Toggles SEARCH on/off.
  • MANUAL: Stops various functions and inputs manual channel selection.
  • SCAN: Starts scanning.
  • PRIORITY: Toggles Priority function on/off.
  • LOCK OUT: Deletes unwanted channels for programmed scan.
  • CLOCK: Displays clock time.
  • LIGHT: Illuminates the LCD display.
  • LOWER/UPPER: Sets lower/upper frequencies for programmed search.
  • Main Tuning Knob: For manual frequency selection.

Rear Panel Controls:

  • ANT: BNC type antenna connector.
  • Serial Number Plate: Device identification.
  • DC 12V: 12V DC input jack.
  • ATT: Attenuator (-10 dB) to reduce strong incoming signal strength.
  • EXT SP: External speaker jack.
  • RMT: LED indicator for remote control operation.
  • REMOTE: Socket for RS232 interface.

Operation Procedures:

  1. Power On: Connect 12V DC power, turn the squelch control maximum clockwise, then turn on the power switch and rotate squelch to the 10 o'clock position.
  2. Initial Scan: The unit automatically starts scanning between CH01 and CH20 upon power-on (factory-stored frequencies for test).
  3. Mode Check: Ensure LOCK OUT, SEARCH, PRIORITY, DELAY are OFF (no LCD indication).
  4. Squelch Setting: Adjust the squelch control clockwise until background noise from the speaker is cut off. This is the most sensitive setting, but a slight further clockwise adjustment can prevent interference from stopping the scanning.

Storing Frequencies:

To store a frequency (e.g., 128.80 MHz AM into CH01):

  1. Depress MANUAL (stops scan).
  2. Depress AM ENTER (LCD shows AM mode).
  3. Depress 1 2 8 . 8 0 ENTER (LCD shows 128.800 and receives signal, "CH" flashes).
  4. Depress 0 1 ENTER (frequency stored in CH01, "CH" stops flashing).
    • Channel input must be 2 digits (e.g., 01, 02).

Recalling Memory Channels:

To recall a frequency (e.g., channel 15):

  1. Depress MANUAL.
  2. Depress 1 5 MANUAL.
    • Do not enter 00 or figures between 21 and 99, as this may transfer the frequency to channel 20.

Memory Back-up:

A built-in capacitor preserves frequencies in the memory bank. No battery replacement is needed for memory back-up. However, frequencies will vanish if power is disconnected for approximately one week due to capacitor discharge.

Scanning:

  • The AR-2002 can scan frequencies stored in 20 memory channels.
  • To start scanning, depress SCAN (PRIORITY must be OFF).
  • To stop scanning, depress MANUAL.
  • Memory channels can be advanced manually by depressing MANUAL.
  • LOCK OUT can be used to program specific channels for scanning.
  • A "beep" confirms correct keystroke entry (high tone for correct, low tone for wrong).

Searching:

The AR-2002 can search continuously or within programmed ranges in 5, 12.5, or 25 kHz steps.

  • Continuous Search (e.g., 25-550 MHz, 800-1300 MHz in 5 kHz steps):

    1. Depress MANUAL.
    2. Depress 5 kHz ENTER.
    3. Depress 2 ENTER.
    4. Depress 1 3 0 0 ENTER.
    5. Depress SEARCH.

  • Programmed Search (e.g., 360-400 MHz in 12.5 kHz step with NFM):

    1. Depress MANUAL.
    2. Depress LOWER.
    3. Depress 3 6 0 0 ENTER.
    4. Depress UPPER.
    5. Depress 4 0 0 0 ENTER.
    6. Depress NFM ENTER.
    7. Depress 12.5kHz ENTER.
    8. Depress SEARCH.
    • Search direction can be changed with UP/DOWN keys.
    • Search speed can be changed with SPEED key.
    • Ensure the HIGHER frequency is always greater than the LOWER frequency.

LOCK OUT:

To delete a channel from scanning (e.g., channel 10):

  1. Depress MANUAL.
  2. Depress 1 0 MANUAL.
  3. Depress LOCK OUT.
    • "LOCK OUT" will appear on the LCD, and channel 10 will be skipped.
    • Repeat the process to release LOCK OUT.
    • If all 20 channels are locked out, scanning will not function, and "PASS" will appear on the LCD.

Main Tuning Knob:

Used for manual frequency selection.

PRIORITY:

  • The set has a priority channel (Channel 01).
  • Enter the desired frequency into Channel 01 and depress PRIORITY.
  • Channel 01 will be monitored at approximately 2-second intervals.
  • If a signal appears on Channel 01, the receiver will stop scanning and stay on Channel 01.
  • "PRIORITY" will appear on the LCD, and "P" will appear alongside the CH number when a signal is received on the priority channel.

DELAY:

  • The DELAY key delays the resumption of scanning for approximately 2.5 seconds during a pause in transmission.

Time Display and Setting:

The AR-2002 has a built-in 24-hour clock.

  • To display time: Depress MANUAL, then CLOCK. (Time will not display if PRIORITY is engaged).
  • To release time display: Depress any key (ENTER, SCAN, SEARCH) to resume frequency display or scanning/searching.
  • To enter time (e.g., 7h 15m 20s AM):
    1. Depress MANUAL CLKSET ENTER.
    2. Depress 0 7 1 5 2 0.
    3. Depress ENTER (synchronize with an official time source).
  • Time is retained by the memory back-up system for about one week after power disconnection. The LCD will not display the time until power is reconnected.

Maintenance Features:

  • Handling Precautions:
    • Avoid direct sunlight or heating instruments where temperatures can exceed 60 degrees Celsius (140 degrees Fahrenheit), as this can cause deformation or damage.
    • Avoid places with water splashes, high moisture, and dust.
    • Clean with a soft cloth; do not use chemicals like thinner or benzene.
  • External Aerial: Recommended for picking up distant or weak signals. Ensure external aerials are not erected near power lines, telephone lines, or buildings.
  • Troubleshooting:
    • No Power: Check power plug connection, AC adapter connection, and DC polarity.
    • No Audio Output: Check volume control (turned down), squelch control (fully clockwise), and if an earphone plug is inserted into the external speaker jack.
    • Set Not Functioning During Operation: Depress MANUAL and try entering inputs. If scan and search don't function, turn the squelch knob fully clockwise.
  • Internal Beat Frequencies: Some frequencies may not be received due to internal beat, such as 47.000MHz, 94.000MHz, 94.980MHz, 141.000MHz, 159.940MHz, 187.990MHz, 219.980MHz, 234.990MHz, 284.940MHz, 469.980MHz.
  • Receiver Desensitization: If excessively strong nearby signals are present, use the ATT switch on the rear panel to reduce incoming signal strength and prevent desired signals from being blocked.

Optional Accessories:

  • External Antenna: DA-300.
  • Mobile Mount Bracket: MM-1.
  • RS232 Remote Control Unit: RC PACK.

AOR AR-2002 Specifications

General IconGeneral
BrandAOR
ModelAR-2002
CategoryReceiver
LanguageEnglish

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