User's Manual

22
S2510 Reader - Reference Guide April ’00
2.2.3 Indicators
There are six LEDs on the front panel of the reader they are described in Table 25
.
The TX Active and Read O.K. LED lines are also made available for external use if
required, details are given in section 4.7.
2.2.4 Potentiometers
There are two potentiometers that can be adjusted through the reader front panel,
they are: the RF Power Output adjustment potentiometer (2.2.4.1) and the EMI /
Sync. Level adjustment potentiometer (2.2.4.2).
2.2.4.1 RF Power Adjustment
The potentiometer can be used to adjust the internal oscillator pulse width and thus
the generated antenna voltage/field strength. Turning the potentiometer clockwise
causes the field strength to be increased.
2.2.4.2 EMI / Sync. Level Adjustment
This potentiometer allows the receiver signal strength threshold level to be adjusted
for wireless synchronization. Turning the potentiometer clockwise results in maxi-
mum sensitivity.
There is one fuse on the S251B that is: 2A Slow-blow. If the fuse should blow, replace
it with the replacement fuse supplied with your reader.
2.3 Mechanical Information
The mechanical dimensions and weight are given in Table 26.
Table 25: Indicators
Indicator Description
EMI Indicates the presence of Electro Magnetic interference
TX Active Indicates activation of the RF transmitter
Read O.K. Indicates a response from a valid transponder
Antenna
Tuning
L
↑
Antenna out of tune, inductance too high
O.K. The DAT has tuned the antenna to maximum resonance voltage
L
↓
Antenna out of tune, inductance too low
Table 26: Mechanical Information
Parameter Value
Height 120 mm
Width 120 mm
Length 200mm
Weight 900 g