Maestro tuning rumble

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  • Problem
  • Updated 2 years ago
  • Acknowledged
Hi I am a new 6700/Maestro user. I have noticed a frequent loud brief rumbling noise when tuning the VFO. This happens whether using the knob or the touch screen to tune, and only when the frequency begins to change, not during continuous tuning, unless the direction is suddenly reversed.     v1.10.16.91

BTW the knob has a nice feel but is loose and unbalanced - can the drag be tightened?

Thanks 73
 Bob HS0ZIA
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Bob Kupps

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Posted 2 years ago

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Tim - W4TME, Customer Experience Manager

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I have not experienced anything that would be described as a rumbling noise.  Is it a mechanical noise as opposed to something heard in the speakers or headphones?

There isn't a tension control on the tuning knob.  Some people who prefer more resistance in the tuning knob have installed felt washers on the shaft encoder.
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Bob Kupps

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It's a relatively loud popping sound in the headset; sounds similar to the pops on a LP record. It is quite apparent at 400Hz CW mode on a quiet band. Occurs every few times I QSY using either the knob or my finger on the touch screen.
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Tim - W4TME, Customer Experience Manager

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How is the Maestro connected to the radio?  is it via a local LAN (Ethernet) or wireless connection?
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Bob Kupps

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The Maestro and the 6700 are both cabled to a 5 port switcher/router along with 2 PCs and the internet connection.
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Gayle Lawson

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Yes I hear the same random pops when I'm tuning with the Maestro, they are most noticeable in the CW mode.  The Head phones can be  connected to the radio front panel or the Maestro, the pops are present on both configurations. 
Maestro is connected through a Linksys switch to a 6500, the Network  latency is less that 1 ms.   I have tried direct connect to the radio the pops are still present.  If the AGC threshold is set so to a low value (band noise is barely heard)
no pops.   As you increase the AGCT the pop is heard.  I have listened to the radio in the USB mode, no pops are heard, however, if the SSB bandwidth is reduced to 500 Hz and the pass band shifted to 600 or 700 Hz then one begins to hear the pops again.  You should be able to connect the radio to a dummy load and duplicate the pops or snap that I'm hearing. 
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Tim - W4TME, Customer Experience Manager

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Official Response
Based on the excellent problem description provided by Gayle Lawson, I have entered this problem report into our bug tracker as issue #4882 for additional investigation. Thank you for the defect report.
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Gayle Lawson

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Tim:

I performed a reset on my Maestro this evening (Dudley has that procedure well burnt into my memory). After resetting the Maestro I can not reproduce the problem, the pops and snaps are gone.   I recommend that you pull #4882 back.  Prior to the reset I could easily reproduce the problem in 15 to 20 seconds on a dummy load.   I think the issue will reappear sooner or later.

Regards

Gayle K0FLY
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Bob Kupps

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Thanks for your info Gayle. A search of this forum seems to indicate that the Maestro cannot be reset. Could you explain or link to the procedure?
TU 73
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Tim - W4TME, Customer Experience Manager

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Gayle - I am going to leave the defect open because there is an issue that needs investigation.  Thanks for your follow-up report.
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Gayle Lawson

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Bob:

I have copied this from an E-mail from Dudley.  The procedure never worked for me due to the fact that I had a hardware problem.  It appears to have worked for this issue.   It will be interesting to see if the pops/snaps in the audio come back.

Tim:
The noise that I hear while tuning is similar to the one that I hear when the WNB is turned off from the Maestro

Gayle K0FLY

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Please run this Maestro reset procedure to configure the Maestro to run in the most reliable and stable configuration.  It is important to follow this procedure exactly to determine the nature of your issue.

1.) If the Maestro is running, power off the FLEX-6000 at this time.  Disconnect any cables connected to the Maestro.

2.) If you have a battery bank installed in your Maestro, **disconnect the USB cable from it** so that the Maestro is not using battery power.

3.) Connect the Maestro to a wired Ethernet connection using the RJ-45 Ethernet connector that is located on the same side of the Maestro as the DC coaxial power connector.  This connection can be to your local LAN network or a direct connect to the FLEX-6000.   Before connecting the Ethernet cable to the Maestro, visually inspect the Ethernet connector to ensure that there isn't any foreign bodies, like Styrofoam packing material, inside the connector that could cause it to not make a proper connection.  You can use compressed air or a non-metallic tool, like a toothpick, to remove anything that may be in the connector.

4.) Connect the supplied AC power adapter to Maestro.  Make certain that the AC power adapter is connected to a known good power source (if a power strip, make sure it is turned on) and operating properly.  You may need to check the DC output of the AC power adapter if this step is not successful.  If the Maestro was powered off, connecting the AC power adapter may cause the Maestro to boot.  If this happens, allow it to boot up to whichever screen comes up.  Then press and hold the power button for 10-15 seconds.  You may see a blue screen pop-up while doing this. If so continue to hold down the power button until the blue screen disappears.  Then release the power button.

5.) Allow the Maestro to stay connected to the AC power in the powered down state for 15-30 minutes to allow for the internal display battery to recharge.

6.) After allowing for the internal battery to recharge, start the FLEX-6000 and allow it to boot up.  After the FLEX-6000 has booted up, boot the Maestro bypressing and holding the Maestro power button for 5-6 seconds and then releasing.

7.) To verify operation of the Maestro, we are going to connect to the FLEX-6000 , not the wifi. Please connect the Maestro to a wired Ethernet connection that is on the same LAN as the FLEX-6000 or directly connected to the FLEX-6000.  When the Maestro boots up to the Select a Radio screen, there should be the Ethernet icon in the lower left-hand corner (A PC with an Ethernet cable).  If you have previously connected Maestro to a wifi network, you will need to "forget" the network temporarily so that we use only the Ethernet connection.  To do this, tap on the <Wifi option at the top left corner of the Select a Radio screen. Select the connected wifi network by tapping on it to highlight and then tap on the Forget button.  At this point, there should only be the Ethernet icon displayed in the bottom left-hand corner of the screen, indicating wifi is disconnected and the Ethernet is connected.  Tap on the Radio> option at the top right corner of the screen to return to the Select a Radio screen.  If you are still not seeing the Ethernet icon in the lower left-hand corner of the screen, please visually inspect the RJ-45 connector on the Maestro to make sure there is not any material or foreign bodies in the connector that would prevent it from making a proper connection.

8.) Select your radio and then tap on the Connect button.

9.) Select SmartSDR v1.8.4 (minimum version) or the latest installed version of SmartSDR for Maestro.  This would be the latest version of Maestro displayed that does not have the blue software download icon beside it.  It may have a green Radio Update Required arrow shown and this is OK, as it indicates that the radio firmware needs to be synced with the version you select to run.  Tap the Update button if displayed, otherwise, just select the proper Maestro version and tap on the Run button.

10.) The Maestro should boot up normally at this point.  If not, please describe the error in detail and if there are any error screens displayed, please take a picture of it so er can see the entire details.  If the error message has an option to "Show More", please tap on the Show More button and take a picture of the error message detail.

Dudley Hurry, WA5QPZ

FlexRadio SystemsTM
4616 W Howard Ln Suite 1-150
Austin, TX 78728
Phone: 512-535-4713


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Bob Kupps

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Hi after rebooting the Maestro per the above instructions the popping noise is gone.

Thanks guys!