EIA-232 trip points are positive so that you can cheat and drive them
with logic, so it is not unusual to find 232 that doesn't go negative.
This is OK for short distances. This should not be called 232, but often
they state 232 "compatible." You can take a logic gate and make it
handle +/-15V with clamping diodes and a resistor divider, so some
devices don't even use 232 chips.
Looking at the datasheet, it appears 232 is an option.
On 12/9/2012 10:24 PM, James Peroulas wrote:
For the record, my device did have an OSMT (not Hirose) connector on the
DDS board.
I'm having trouble getting the internal RS232 port on the DDS board to work
and I was wondering if there were any tricks to it? I'm not able to get it
to respond to the 'S' command and when I measure the voltage on the RS232
TX pin (#2 from the left) it's always 0v. Shouldn't it be -12v when idle?
Thanks,
James
On Mon, Nov 26, 2012 at 11:22 PM, James Peroulas <[email protected]> wrote:
Was wondering if anyone ever confirmed the type of RF connector found
internally in the FE-5860a?
I've seen several posts calling it a Hirose U.FL, but the linked thread
suggests that it might actually be an OSMT connector:
http://www.vklogger.com/forum/viewtopic.php?t=10289
Or is everyone simply soldering cable directly to the center pin?
Thanks,
James
--
*Integrity is a binary state - either you have it or you don’t.* - John
Doerr
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