John,
IMO, PowerSDR is correct in limiting the transmit bandwidth to less
than 4khz, otherwise you could transmit a wider bandwidth signal than is
allowed for that frequency.
The incorrect Cat_Command_Dictionary.pdf documentation incorrectly
stating a range of 00500 to 2 needs to be fixed. Furthermore
setting the ZZTH to an acceptable value does not return a result,
contrary to the information in the same file.
Bill KC9XG
On 2/14/2012 4:49 PM, John Vandenberg wrote:
Thanks Bill,
Looks like you get the same results with your F-1500. The high
cut-off I can set is also 3650Hz. Wonder if Dudley or Tim could
comment on this if this is a limitation of the F-1500 or PowerSDR. I
was getting into this when I was trying to setup a MaCRO for
Win-Warbler which handles a 4khZ spectrum. It looks like the maximum
bandwidth on TX is 3650Hz.
Correct me if wrong please.
John, ve3dvv
Message: 6
Date: Mon, 13 Feb 2012 17:58:09 -0600
From: Bill Diaz
To:flexradio@flex-radio.biz
Subject: Re: [Flexradio] Macro ZZTH04000; problems.
Message-ID:<4f39a391.6060...@comcast.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
John,
I have found that the Flex CAT documentation is not all that
accurate. Some commands don't work as documented or return unexpected
results.
According to the ZZTH command as documented in
CAT_Command_Dictionary.pdf, sets or reads the TX Filter High setting
within a range of 00500 to 2;
The documentation indicates you get get the current ZZTH setting by
sending ZZTH; My Flex 1500 returned ZZTH03100; . This corresponds to
the the "Transmit Filter High" value of 3150 found on my Setup, Transmit
tab.
If I try to enter 2 as a "TX Filter HIgh" value on the setup,
Transmit tab, it drops back to 3650.
Sending ZZTH2; to the Flex1500 gets no response. Sending
ZZTH04000;, ZZTH03000; etc gets no response. It is either broken or
mis-documented.
The ZZTL; command for setting the "TX Filter Low" exhibits the same
behavior, you can read it but you can't set it.
These results are not all that surprising based on my experience
with the PowerSDR CAT commands. It appears that the commands get
documented, more or less, but it also appears that nobody ever tests the
commands to see if they actually work.
Bill KC9XG
On 2/13/2012 4:43 PM, John Vandenberg wrote:
> This macro sets the high cutoff frequency for the transmitter. The
> macro works fine on my F-5000, but not on the F-1500. Can anyone
test
> this for me on a F-1500. The manual says it should P1 = 00500 to
2.
> Is this a bug related to the F1500?
>
> John, ve3dvv
>
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