Vertex VX-454 VHF Receive beginning of recieved audio is cut off.

[mkrzan1]

Hello all,
I'm having a problem with the radio. It seems that first second or so of a received signal is getting cut off. It happened when the radio is in both scanning and not scanning. I've tried the power saving functions both on and off with no success. Just wondering if anyone has some ideas as to what it may be. Also I'm wondering which version of the firmware is the old and which is the updated version. I don't know which version I have at the moment as I am at work, but I will post it later on today. Any help is much appreciated!

Mark
KB3UIL

 

[alex_baker2002]

Hello all,
I'm having a problem with the radio. It seems that first second or so of a received signal is getting cut off. It happened when the radio is in both scanning and not scanning. I've tried the power saving functions both on and off with no success. Just wondering if anyone has some ideas as to what it may be. Also I'm wondering which version of the firmware is the old and which is the updated version. I don't know which version I have at the moment as I am at work, but I will post it later on today. Any help is much appreciated!

Mark
KB3UIL

I had an issue with this while the channel was in mixed mode. I contacted Vertex and they basically said tough luck. Im not sure if the 454 is digital or not but that is my experience.

 

[mkrzan1]

It's analog only. I'm still playing with some settings but no luck yet

 

[kayn1n32008]

Wirelessly posted (Mozilla/5.0 (BlackBerry; U; BlackBerry 9780; en-US) AppleWebKit/534.8+ (KHTML, like Gecko) Version/6.0.0.600 Mobile Safari/534.8+)

Some radios take FOREVER to decode PL/DPL. I had a kenwood that would take almost a full second to pass audio with receive DPL, yet a Motorola P110 would be almost instantaneous decode listening to the same frequency w/ receive DPL enabled

 

[mkrzan1]

Ironically enough I just got done testing it with and without receive PL tones. No difference. Even when it's not scanning the antenna icon will light up but the audio is slow to come out. It's really got me befuddled. I DO appreciate all the input so far.

 

[OregonScanner]

I have a 454 arriving tomorrow, but I noticed in the software that "Squelch Level" is automatically set to 4. It can be changed for each frequency. Maybe changing that would do something. My programming cable was back ordered but I'll program a couple of freqs in by hand if I can and see what happens.

 

[OregonScanner]

This is what the help menu in the CE115 VX 450 series software says:

SQL (SQUELCH) LEVEL:
This parameter individually selects the precise value for the "Noise SQL Threshold".

I also found this:

RX SENSITIVITY TUNING ALIGNMENT
This parameter is to align the RX BPF (Band Pass Filter) for Receive (RX) sensitivity.
The PLL Reference Frequency (Frequency) alignment must be done before this alignment is performed.
1. Press the “RX Tune” button to start the alignment ,then RX Sensitivity Alignment window will appear.

2. Select the "ADJ Type" whether "Basic" , "Single" or "All Freq".
Basic : "Low-edge / band center / high-edge" and select the channel for alignment (Default)
Single : Alignment value changes only on the selected channel.
All Freq : Alignment value changes on all channels.

3. Click the left mouse button on the slide bar or press Up / Down arrow key , to switch to the selected channel.

4. Set the Signal Generator according to the indication at the top of the screen.

5. Drag the slide bar, click the up-down buttons, press the left or right arrow key, or enter the value in the entry box to get the best RX sensitivity. (Highest RSSI value).

6. Click the “OK” button to finish the RX Sensitivity alignment and save the data.


I don't know for sure, but maybe this would help.