investigating Some VHF frequencies incorrectly require trailing zeros.

[WHOGX5]

When entering a new radio frequency into the VHF radio, any frequency above 100 MHz incorrectly require trailing zeroes, otherwise it will just flash and refuse the entry. Here are some examples to clarify the issue.

Input -> Expected results -> Actual result

15 -> 15 -> 15

30 -> 30.00 -> 30.00

301 -> 30.10 -> 30.10

120 -> 120.00 -> Error

1200 -> 120.00 -> Error

12000 -> 120.00 -> 120.00

Here are similar examples for the UHF radio (which works correctly):

15 -> 15 -> 15

300 -> 300.00 -> 300.00

3000 -> 300.00 -> 300.00

30000 -> 300.00 -> 300.00

The UHF radio works as expected and the VHF radio works correctly except when entering frequencies above 100 MHz where you need to enter five digits rather than three to be able and input the frequency.

B_VHF_Trailing_Zeros.trk

[Lord Vader]

Hello @WHOGX5

Although the DED interface is the same the radio systems behind them are a bit different.

Do you have any evidence the frequency input for the AN/ARC-222 should work like the AN/ARC-164?

If you do, please PM that evidence to @BIGNEWY.

Thanks.

[Moonshine]

pm sent

[WHOGX5]

6 hours ago, Lord Vader said:

Hello @WHOGX5

Although the DED interface is the same the radio systems behind them are a bit different.

Do you have any evidence the frequency input for the AN/ARC-222 should work like the AN/ARC-164?

If you do, please PM that evidence to @BIGNEWY.

Thanks.

Apparently Moonshine was quicker then me in sending documentation, but in every piece of publicly available information I have seen the description of the input process for the VHF radio is simply explained as "it works identically to the UHF radio". In the description of the UHF input process, it clearly states that trailing zeros are not required. It also wouldn't make any sense in the case of the AN/ARC-222 specifically since there is no overlap in numerical ranges between the preset channels, VHF FM frequencies or VHF AM frequencies. Any number between 1-20 is a preset channel, any 2-4 digit number beginning with 3-8 is a FM frequency and any 3-5 digit number beginning with 1 has to be a AM frequency.

[Lord Vader]

We will have a look, for sure @WHOGX5.

Thanks for your care.

[WHOGX5]

3 minutes ago, Lord Vader said:

We will have a look, for sure @WHOGX5.

Thanks for your care.

Thank you for your help getting everything reported!