Kenwood TM-G707

[KG5HHS]

Hello,
I work in a Hospital / Flight Following Communication Center that has a Kenwood TM-G707 for ham use. I know this radio is intended for amateur radio (Which we would use in a disaster). I know this radio is not meant to be a scanner but I figured since it has the function, why not use it. Currently, I have programmed the most used Aviation Freqs (Tower, Ground, APR/DEP, ARTCC) and Ham Repeaters. The scan function is very slow and only stays on the channel for a few seconds. Is there any way to speed up the scanning and increase the amount of time it stays on a frequency?

 

[KE5MC]

John,

I didn't look for any information on scanning speed as that is the result of the design and indented use. Dedicated scanner always beats communication transceivers on speed and I can't say I have ever found a radio you could change the scanning speed on. Not to say there isn't.

On page 39 of the manual I Googled.

Time-Operated mode​

Your transceiver stops scanning when detecting a signal,​

remains there for approximately 5 seconds, and then​

continues to scan even if the signal is still present.​

•​

Carrier-Operated mode​

Your transceiver stops scanning when detecting a signal​

and remains on the same frequency until the signal drops​

out. There is a 2 second delay between signal drop-out and​

scan resumption to allow time for any responding stations to​

begin transmitting.

 

[KG5HHS]

John,

I didn't look for any information on scanning speed as that is the result of the design and indented use. Dedicated scanner always beats communication transceivers on speed and I can't say I have ever found a radio you could change the scanning speed on. Not to say there isn't.

On page 39 of the manual I Googled.

Time-Operated mode​

Your transceiver stops scanning when detecting a signal,​

remains there for approximately 5 seconds, and then​

continues to scan even if the signal is still present.​

•​

Carrier-Operated mode​

Your transceiver stops scanning when detecting a signal​

and remains on the same frequency until the signal drops​

out. There is a 2 second delay between signal drop-out and​

scan resumption to allow time for any responding stations to​

begin transmitting.

Ah, Thank you. Hmmm... The only problem with that, is I am scanning aviation frequencies with no tone.

 

[FKimble]

The directions given have no mention of tone. Signal is not "tone". Try it it should work.

Frank

 

[cmdrwill]

Even two seconds seems a long time to resume scanning in the OP.

 

[KG5HHS]

I no longer have the radio or the manual right in front of me (an wont for another week, I work PRN). How would I get the radio to scan in Carrier-Operated Mode? The only thing I have access to is the codeplug and the software I have on my laptop.

 

[FKimble]

Just don't put any "tones" in the codeplug.

 

[KG5HHS]

Just don't put any "tones" in the codeplug.

Just looked at the codeplug. All the Aviation freqs have no tones, The Frequencies that have tones programmed are repeaters that require the tones for access. Those are programmed with "Tone" mode and not "T Sql" Mode.
In "Tone" Mode, Only the CTCSS is able to be selected. (I'm assuming thats TX CTCSS?). and the RX CTCSS is grayed out. In "T Sql" Mode, Both CTCSS and RX CTCSS are able to be selected. I don't have anything programmed with the "T Sql" Mode, Just "Tone". During scan mode, it is only stopping on the frequency for a few seconds regardless of whether or not the conversation is finished.

 

[kayn1n32008]

Just looked at the codeplug. All the Aviation freqs have no tones, The Frequencies that have tones programmed are repeaters that require the tones for access. Those are programmed with "Tone" mode and not "T Sql" Mode.
In "Tone" Mode, Only the CTCSS is able to be selected. (I'm assuming thats TX CTCSS?). and the RX CTCSS is grayed out. In "T Sql" Mode, Both CTCSS and RX CTCSS are able to be selected. I don't have anything programmed with the "T Sql" Mode, Just "Tone". During scan mode, it is only stopping on the frequency for a few seconds regardless of whether or not the conversation is finished.

You need to change your scan mode from time to carrier. In time mode it hold on the channel for a predetermined amount of time, then resumes scanning even if a signal is present, in carrier mode, scanning pauses, until the carrier drops. It then waits about 2 seconds, then resumes scanning if no carrier is detected.

Look through the radio menu to fina a 'scan resume' type setting.

Aswell to adress the 'tone' question, when in scan mode, if there is a receive tone(tsql) set, the radio will pause on a TSQL channel, determin if the signal has the valid TSQL if not, it will continue scanning. If it is the right tone it will send audio to the speaker.

TONE only(transmit ctcss) has no bearing on scanning in any way.