[ntp:questions] Tobit LAN!Time DCF77 receiver not working
Rob van der Putten
rob at sput.nl
Thu Dec 24 11:19:49 UTC 2009
Hi there
Marc-Andre Alpers wrote:
> I have no RS232 tester. The cover of the receiver is sealed. No screws.
> http://666kb.com/i/bf7g1grgo1sbus2c1.jpg
>
> The connector inside:
> http://666kb.com/i/bf7fxqd8cr17q7d8x.jpg
That's female on the left and male on the right?
> http://666kb.com/i/bf7g2xelg4xqppx3l.jpg
That's male on the left and female on the right?
> The transistor type is:
> MC78L
> 05ACP
> M535
That's a 78L05; A 100 mA +5 V stabilizer IC.
The circuit appears to be as follows;
M F
DCD 1 ----- 1
RXD 2 ----- 2
TXD 3 ----- 3
DTR 4 ----- 4
GND 5 --+-- 5
|
|
+----------+-----> Red GND
|
+-+-+
+--------+ S +---> Black +5V
F | M +---+
DSR 6 | 78L05
RTS 7 --+-- 7
CTS 8 --------------------> Orange
RI 9 --------------------> Brown
The circuit 'expects' NTPD to raise RTS and read from CTS or RI.
As far as I can tell NTPD does raize RTS but does not read from CTS or RI.
Regards,
Rob
--
Nowadays people know the price of everything, and the value of nothing
Oscar Wilde
More information about the questions
mailing list