AR-DV1 Manual Addendum

Note about the Supplied Power Supply

Switched-mode power supplies can generate power line harmonics that may cause noise on certain frequencies received by the radio. The supplied telescopic antenna is more susceptible to picking up these harmonics due to its proximity to the power supply compared to an outdoor antenna.

Firmware Update via SD Card

The AR-DV1 firmware can be updated using an SD card. Visit http://www.aorusa.com/support/firmware.html for new firmware releases, bug fixes, and improved functionality. Operation details for new functions are also available on this page.

SD Card Compatibility: The receiver supports SD/SDHC cards up to 32GB. Larger cards may have longer access times (up to 60 seconds). Some cards may be incompatible, potentially causing the SD card icon to not appear or the receiver to freeze during recording. A reboot typically resolves such issues.

New Features Added

• DMR Slot Selection (since v.1509F): In DMR mode, press the main dial to activate slot selection. Rotate the dial to choose desired slot(s) and press ENT to validate. In digital AUTO mode, press the main dial twice for slot selection.
• DMR Color Code (since v.1512A): In DMR mode, press the main dial twice to access color code selection. Rotate the dial to select "ON", then press the dial to enter the input menu. Use the keypad to input the 2-digit color code and press ENT. In digital AUTO mode, navigate to DMR settings via the main dial.
• P25 Network Access Code (NAC) (since v.1512A): In P25 mode, press the main dial to access NAC selection. Rotate the dial to select "ON", then press the dial to enter the input menu. Use the dial to select the first digit, then the blue down arrow key to move to the next digit. Input all 3 digits and press ENT to validate. In digital AUTO mode, navigate to P25 settings via the main dial.
• NXDN Radio Access Number (RAN) (since v.1512A): In D-CR (NXDN) mode, press the main dial twice to access RAN selection. Rotate the dial to select "ON", then press the dial to enter the input menu. Use the keypad to input the 2-digit RAN and press ENT. In digital AUTO mode, navigate to NXDN settings via the main dial.

NXDN Descramble Function

(For 15-bit digital scrambling mode NXDN signals. Does not support encrypted mode NXDN signals.)

To use: Select NXDN mode (D-CR) or AUTO mode. Once the desired signal is received, click the main dial once, then long-press the MODE button. Blinking question marks indicate the receiver is searching for the descrambling code (typically 1-2 seconds). The display shows "ENC.CODE", which refers to the descramble code, not encryption.

CTCSS "Reverse Tone" (since v.1702D)

To enable: Press F+1, turn the dial until [RTN] appears, and validate with ENT. The reverse tone frequency is set in CTCSS parameters. This function mutes the squelch when a frequency matching the programmed tone is received and unmutes it when a non-matching frequency is received. It is primarily used by taxi and bus drivers, not typically in ham radio.

D-CR User Code Display (since v.1702D)

The D-CR user code is now displayed.

Discriminator Direct Recording on SD

This feature, which did not work with versions 1812.dv1 and 1903.dv1, allows direct recording of the discriminator signal to the SD card via the AUX socket.

Procedure:

1. On a PC, create a text file and type "DISC" (all caps).
2. Save the file as DISC.txt.
3. Copy DISC.txt to the SD card.
4. Insert the SD card into the AR-DV1.

When the receiver detects this file, it records audio in "discriminator" format (FM mode supports 6kHz, 15kHz, and 30kHz bandwidth). Discriminator audio is an unfiltered, baseband signal required by PC applications for decoding data signals like CTCSS, SCA, FSK, RTTY, FAX, Pager data, and trunked system control data.

TETRA Voice Decoding (2 modes) (since v.1812A)

T-DM mode: DMO MOBILE TO MOBILE (direct mode).

T-TC mode: Traffic channels of trunked TETRA networks.

TETRA reception requires manual mode selection and cannot be part of AUTO MODE detection due to high CPU usage. In SCAN mode, do not mix TETRA and non-TETRA frequencies within the same bank. TETRA encryption is not supported.

Advice for best performance: LEVEL SQUELCH is recommended for TETRA due to its large IF bandwidth. The "noise squelch" filter is not suitable. (Press and hold the SQL knob for 2 seconds to view SQL settings.)

Understanding Trunked TETRA Networks

Diagram Description: The diagram shows a typical TETRA trunking spectrum. The horizontal axis represents frequency (e.g., 400.000 MHz to 401.500 MHz with 25kHz steps). The vertical axis shows signal strength (in dB). Peaks indicate signal presence. The text labels identify "TRAFFIC CHANNELS ARE ALWAYS ACTIVE" and point to specific frequency bands where multiple signals are present. Another label indicates that each traffic channel has 4 audio slots.

Instructions for TETRA Operation:

• Manual Tuning to a Traffic Channel (VFO):
  1. Set receive mode to T-TC (MODE key + rotate dial + ENT).
  2. Enter frequency (keypad + ENT).
  3. Set SQL level to 0.
  4. To select a TETRA slot: Press the main dial, rotate to choose a slot number or AUT (automatic), then press ENT.
• Scanning TETRA Networks (SCAN):
  1. First, save frequencies into a SCAN BANK.
  2. Set receive mode to T-TC (MODE key + rotate dial + ENT).
  3. Enter each frequency (keypad + long press ENT + 3x ENT).
  4. To start scanning: Press SCAN key twice.

  Squelch Adjustment for SCAN: Set SQL to maximum (99) and gradually reduce it to balance signal capture and scan speed. A higher SQL level increases scan speed but may miss some transmissions if set too high.

  To stop scanning and return to VFO: Press VFO key.

• Searching TETRA Networks (SEARCH):
  1. Create a SEARCH BANK for frequencies between a lowest and highest value.
  2. Press F key + 6 key, then ENT.
  3. Enter lowest frequency (keypad + ENT).
  4. Enter highest frequency (keypad + ENT).
  5. Set STEP value to 25k (rotate dial + ENT).
  6. Set MODE to T-TC (rotate dial + ENT).
  7. Press ENT 3 times.
  8. To start SEARCH: Press SRCH key.

  Squelch Adjustment for SEARCH: Similar to SCAN, set SQL to maximum (99) and reduce gradually. Higher SQL increases search speed but may cause missed signals if too high.

  To stop search and return to VFO: Press VFO key.

Advice on How to Improve Scan Speed

Scan speed is fastest when analog and digital/auto mode frequencies are in separate banks. Switching between complex algorithms consumes significant CPU time.

LCD Direction (since v.1903A)

The LCD display can be mirrored or flipped for special vehicle applications.

Procedure: Press F+7, use the down arrow to select "LCD DIRECTION", rotate the dial to choose orientation (0=normal, 1=mirror, 2=vertical+mirror, 3=180 degrees), then press ENT.

IF Direction (since v.1907B)

This advanced setting allows adjustment of the IF direction, useful for digital decoding tests when connecting another receiver's IF OUT to the AR-DV1's antenna input.

Procedure: Press F+9, use the down arrow to select "IF DIR", rotate the dial to select NOR or REV, then press ENT.

AR DATA EDITOR

(Requires v.1907B for Tetra slot number feature)

A browser-based memory data editor is available at http://www.aorja.com/AR-DATA-EDITOR/help.html. It allows loading, editing, and saving receiver memory data, creating new frequency databases, and converting file formats between AR-DV1 and AR-DV10.

Optional PRO Feature: TETRA GSSI User Group Filtering (since v.2101C)

This feature is standard on the AR5700D but is a chargeable option for the AR-DV1.

Activation: Purchase an activation key at https://www.aordirect.jp/. Then, register the 15-digit key in the receiver:

1. Press F+7.
2. Navigate to "TETRA ACTIV." using the UP arrow.
3. Press ENT.
4. Input the 15-digit key via the keypad. The screen will revert to VFO mode after the last digit.

Checking Activation: Press F+7, navigate to "FIRM VER." using the UP arrow. If the firmware version number is appended with "T" (e.g., 2101CT), activation is successful. If not, re-enter the code carefully.

The activation code remains in memory after firmware updates, system resets, and full resets.

How to Use the Optional TETRA GSSI User Group Filtering PRO Feature

Step 1: Tune to Traffic Channel

In T-TC mode, tune to any traffic channel of the target TETRA network. The receiver will automatically switch to its main traffic channel.

(Visual: VFO mode display showing frequency, mode, signal strength, etc.)

Step 2: Long Press SCAN

Press and hold the SCAN button.

(Visual: "Monitored traffic channel & GSSI favorites" list appears, showing GSSI numbers like 3000444, 3000484, 3000106.)

If this is your first use, the "favorites" area will be empty. This area lists GSSI numbers of monitored TETRA networks; activity on a GSSI is needed for it to appear, which may take time.

Step 3: Bookmark a GSSI

Press ENT to select a GSSI from the list. Press CLR to clear the list. Press ENT again to bookmark a GSSI.

(Visual: GSSI list showing entries like ">3000444 3000464", "X3000109", etc. with page numbers.)

Step 4: Assign a Name to a GSSI

Long press ENT on a bookmarked GSSI. Enter characters via the keypad and use the main dial to move the cursor.

(Visual: "Assign a name to a GSSI" screen showing GSSI number and a field for TITLE.)

Choose Between GSSI Single or Multi Receive:

Press MODE to toggle between SNG (Single) and MUL (Multi). SINGLE mode receives only the selected GSSI. MULTI mode receives all active GSSIs.

Selected GSSI: Use the main dial to change the selection. In SINGLE mode, only the selected GSSI will be heard.

GSSI Received Now: Displays the currently received GSSI.

GSSI with Activity: Lists GSSIs that have shown recent activity.

Muted GSSI: Press PASS to mute or unmute a GSSI.

GSSI List Page: Shows the current page number (e.g., 01/03). Maximum 7 pages or 50 entries.

How to Delete a Bookmark: Select the bookmark with the main dial and press FUNC + CLR.

To leave the GSSI function, press VFO.