[App_rpt-users] Problem getting RTCM to process received audio

Sat Nov 25 20:02:47 UTC 2017

I did a Firmware Reset by setting SW2-1.  Now its lost my IP settings (not
surprising).  What are the default IP settings for a firmware reset RTCM?

On Sat, Nov 25, 2017 at 11:27 AM, Jesse Lloyd <ve7lyd at gmail.com> wrote:

> Yup. So your levels are either too hot or too low coming in. Throw a test
> tone on the receiver and measure your audio level with a scope or dmm on
> the input to the RTCM.
>
> Cheers,
> Jesse
>
> On Nov 25, 2017, at 12:00 PM, Doug Kingston <dpk at randomnotes.org> wrote:
>
> Mine never goes solid.  It starts blinking more quickly but not as quickly
> as the heartbeat LED.  I think that means the test failed.
>
> On Sat, Nov 25, 2017 at 10:34 AM, Jesse Lloyd <ve7lyd at gmail.com> wrote:
>
>> I flip both middle switches (2&3) down. Wait for the LED to go solid.
>> Flip them back.
>>
>> Cheers,
>> Jesse
>>
>> On Nov 25, 2017, at 10:33 AM, Doug Kingston <dpk at randomnotes.org> wrote:
>>
>> Yes, I believe I am feeding unsquelched audio to the RTCM.  How do you
>> properly do the calibration procedure?
>>
>> -Doug-
>>
>> On Sat, Nov 25, 2017 at 9:28 AM, Jesse Lloyd <ve7lyd at gmail.com> wrote:
>>
>>> Are you feeding unsquelched discriminator audio to the RTCM?
>>>
>>> The calibration needs to work before the RTCM will squelch properly.
>>>
>>> Cheers,
>>> Jesse
>>>
>>> On Nov 25, 2017, at 10:18 AM, Doug Kingston <dpk at randomnotes.org> wrote:
>>>
>>> I am trying to prototype a RTCM based voting system with 2 RTCMs.
>>> I am using two JSLM2 Data Radios as transceivers.
>>> Using HP8920B service monitor to drive the radios.
>>>
>>> Good news: I can get both RTCMs and both radios to transmit.  Test tones
>>> sound fine. Deviation good.
>>>
>>> Bad news: I can't get the RTCMs to register the incoming audio signal.  There
>>> is no CTCSS in these radios, so that line is not connected.  I have no COS
>>> signal connected either.  Just audio in/out and PTT to the radio.
>>>
>>> I have confirmed the radios are receiving and are sending audio to the
>>> RTCMs using an oscilloscope.  If anything the audio is way high in level.
>>> I measured 1v peak-to-peak when I think the RTCM is expecting 200mV.  Tried
>>> the 20db pad with no effect.  My suspicion is that the RTCM is a
>>> high-impedance input so the voltage is floating up in the absence of
>>> appropriate load (say from a 600 or 2k ohm).
>>>
>>> Second, I never get the green receive light on so I suspect there is
>>> actually some squelching or some such going on that is gating the audio
>>> signal off.
>>>
>>> Third, I have not been able to the the Squelch calibration or Diode
>>> calibration to behave.  Does this require the diagnostic cable described in
>>> the interface to be used?  The procedure is not documented well.
>>>
>>> I would love to see a know working config and wiring setup to confirm
>>> what I have done.
>>>
>>> -Doug-
>>>
>>> Current settings:
>>>
>>> Select the following values to View/Modify:
>>>
>>> S/W Version: 1.51 08/08/2017
>>> System Uptime: 2095.0 Secs
>>> IP Address: 192.168.0.75
>>> Netmask: 255.255.255.0
>>> Gateway: 192.168.0.1
>>> Primary DNS: 192.168.0.1
>>> Secondary DNS: 192.168.0.1
>>> DHCP: 1
>>> VOTER Server IP: 104.197.124.184
>>> VOTER Server UDP Port: 667
>>> OUR UDP Port: 667
>>> GPS Lock: 1
>>> Connected: 0
>>> COR: 0
>>> EXT CTCSS IN: 1
>>> PTT: 0
>>> RSSI: 0
>>> Current Samples / Sec.: 8000
>>> Current Peak Audio Level: 112
>>> Squelch Noise Gain Value: 0, Diode Cal. Value: 0, SQL pot 0
>>> Current Time: Sat  Nov 25, 2017  17:14:12.740
>>> Last Rx Pkt System time: <System Time Not Set>, diff: -198435452 msec
>>> Last Rx Pkt Timestamp time: <System Time Not Set>, diff: 0 msec
>>> Last Rx Pkt index: 0, inbounds: 0
>>>
>>> 1  - Serial # (1162) (which is MAC ADDR 00:04:A3:00:04:8A)
>>> 2  - VOTER Server Address (FQDN) (xxx.org)
>>> 3  - VOTER Server Port (667),  4  - Local Port (Override) (0)
>>> 5  - Client Password (xxx1),  6  - Host Password (xxx2)
>>> 7  - Tx Buffer Length (3000)
>>> 8  - GPS Data Protocol (0=NMEA, 1=TSIP) (0)
>>> 9  - GPS Serial Polarity (0=Non-Inverted, 1=Inverted) (0)
>>> 10 - GPS PPS Polarity (0=Non-Inverted, 1=Inverted, 2=NONE) (0)
>>> 11 - GPS Baud Rate (4800)
>>> 12 - External CTCSS (0=Ignore, 1=Non-Inverted, 2=Inverted) (0)
>>> 13 - COR Type (0=Normal, 1=IGNORE COR, 2=No Receiver) (0)
>>> 14 - Debug Level (0)
>>> 15  - Alt. VOTER Server Address (FQDN) ()
>>> 16  - Alt. VOTER Server Port (Override) (0)
>>> 17  - DSP/BEW Mode NOT SUPPORTED
>>> 18 - "Duplex Mode 3" (0=DISABLED, 1-255 Hang Time) (1/10 secs) (0)
>>> 19 - Simulcast Launch Delay (600) (approx 200 ns, 5 = 1us, > 0 to ENA SC)
>>> 97 - RX Level,  98 - Status,  99 - Save Values to EEPROM
>>> i - IP Parameters menu, o - Offline Mode Parameters menu
>>> q - Disconnect Remote Console Session, r - reboot system, d - diagnostics
>>>
>>>
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>>
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