Dale,
This 60 ohms to ground most probably indicates a hardware fault. The
parallel interface cannot drive that low impedance to the logical 1
level.
Earlier, before I changed away from the parallel cable to USB
connection, I had difficulties that I corrected by soldering a 3.3 kohm
pull-up resistor between Vcc (pin X2-14) and S3 (pin X2-12). Actually
the pin X2-12 is also connected to X1-15 on the PIO board, so make sure
the parallel cable is disconnected when you measure the resistances.
73, Ahti OH2RZ
- Original Message -
From: Dale Richardson [EMAIL PROTECTED]
To: Flex Radio FlexRadio@flex-radio.biz
Sent: Monday, January 30, 2006 1:17 AM
Subject: [Flexradio] Auto Mute Idiosyncracies
I still have not been able to get the auto mute function to work
correctly. When you set up the SDR as receive only and enable the auto
mute box on Setup-General-Options page the SDR goes into mute. This
is
the case when the plug in X2 is disconnected. An ohmmeter reading of
X2-12 to ground indicates 60 ohms. If I set up the SDR with PTT
disabled
on the Setup-General-Options the receiver no longer mutes. Disabling
the PTT also disables the auto mute function. Can anyone else verify
this? I have tried various combinations of settings but nothing works.
The 60 ohm reading seems low to me. Maybe a diode is blown. Any ideas?
73,
Dale AA5XE
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