Software
English, Revision 09, Date: 13.12.2016
39
5.2.2.4
(F)requency & Antenna Tuning
Figure 16
Menu: (F)requency & Antenna Tuning
The
receiver frequency
„(
)x“ is calculated with F
ZF
= 455 kHz and the bandwidth
B = 5.5 kHz according to the following formula:
Figure 17
Formula: Calculation of the receiver frequency
As this is a SSB-reception, according to the above mentioned formula the lower side-
band should be set to 1553000 Hz and the higher sideband to 1575000 Hz (see chap-
ter 3 on page 10).
NOTE!
It is possible to enter values between 0 and 1600000. This is nec-
essary for testing purposes. In practice 1553000 Hz resp.
1575000 Hz have proven to be optimal.
With
or with the
or
keys you may tune the transmitting antenna by switching
the power consumption to max. (resulting in the largest reception range).
enables
switching the transmitter on (
1
) or off (
0
) for control reasons.
is automatically set to
1
upon leaving the monitor.
enables activating auto tuning. Following each system switch on, the transmitter cy-
cle is retuned. This procedure takes approx. 16 sec. After that, every 10 sec. the tun-
ing is checked (as long as there is no transponder within the field) and re-tuned if
necessary. For correct operation the antenna has to be re-started after activating this
function.
S:0008 D:-006 D_Y:+32767 Code: 00000000 Read: 0: N: 1
Frx[/Hz]:66800 Ftx[/Hz]:128000 Csel:1
U[/mV]:23100 I[/mA]: 530 T[Grd.C]:+24 E: 0002 Noise 0
(R)x_Frequency [/Hz]: 1553000 ( 66750 Hz)
A(u)to-Tune 0
(A)ntenna-Tuning [0..15,+,-]: 4
switch (T)ransmitter: 1
(Q)uit Menue
F
rx
4
F
ZF
64 kHz
–
+-
B
2
----
=
