This "SimpleLogger" can be used to watch the traffic between Smartcard and
CAM. (Passive Mode)
Further more it can be used as an Season Interface without an inserted Smart-
card (active Mode)

Normally the power for the MAX232 is drawn out of the Cardslot in the Sat-
receiver. Some Models, like the Irdeto System, can detect the higher current
and do not work. So this Interface uses a external Voltage for the MAX232.
It is regulated to 5 Volt onboard, so you can use any cheap powersupply in
the range of 8 to 25 Volt.

To make this design cheap there are no gimmicks like flashing diodes
or expensive connectors and switches. You have to solder the 9 or 25
pin serial cable directly  the corresponding pads of the PCB.


++++++++JUMPERS+++++++++

JP1 is for "Write enable". If in passive Mode, it is impossible to write
accidently to the card or disturb the datatraffic with unwanted data.

JP 1

Shorting pin 1 + 2   ->  Active Mode (Write enabled) 

use this setting only, if no Card is inserted in the onboard slot.

Open pin 1 + 2  -> Passive Mode (Write disabled)

Use this setting, if you want only watch the traffic between the inserted
card in the onboard slot and the receiver.


JP2

JP2 isnt really a Jumperblock it is the connection to the serial
Port of the Hostcomputer and the external power supply.


JP2       9Pin SubD Serial port cable

Reset    ->   Pin 1
RX Data  ->   Pin 2
TX Data  ->   Pin 3
Gnd      ->   Pin 5


Gnd      ->   Supply Ground
Vcc      ->   +8 to +20 Volt AC

Note: with some Software it is possible that you have to connect the pins
4,6 and 8 together. This is best done directly at the DB9/25 connector.

++++++++PARTLIST+++++++++

IC1 = MAX232
IC2 = 78L05
D1 = BAT41 Shottky!!
D2 = 1N4148 / 1N914
C1 = 100nF Keramik
C2 = 100nF Keramik
4 x 2u2 Tantal / 25 V
1x Smartcardadapter Amphenol


++++++REMARKS+++++

It is very important for this design to use a Shottky diode for D1.
Any other type will definitely NOT work!
Look for the right polarity of the tantalum condensators! The
MAX232 includes a so called chargepump and generates positive an
negative Voltages respect to ground. So it is possible that the 
positive pole of an condensator is connected to ground - this is 
NOT wrong!

For fasten the serial cabel drill bigger
holes at the corresponding points and use cablestrips.

The enclosed Tiff for the PCB has a resolution of 1200 dpi.
For best results make a film out of the PCB.EPS with an
imagesetter
++++++++++++++++++

That's it

Happy hacking


Greetings Alfredo
