Page 410 of 544 NTAG26 XMFR card
553-3011-100 Standard 14.00 January 2002
Signaling levels
MF signaling uses pairs of frequencies to represent digits.
The following table lists the frequency values used for received signals.
Table 130
MF frequency values
Digit
Backward direction
DOD-Tx, DID-Rx
1 700 Hz + 900 Hz
2 700 HZ + 1100 Hz
3 900 Hz + 1100 Hz
4 700 Hz + 1300 Hz
5 900 Hz + 1300 Hz
6 1100 Hz + 1300 Hz
7 700 Hz + 1500 Hz
8 900 Hz +1500 Hz
9 1100 Hz + 1500 Hz
0 1300 Hz + 1500 Hz
KP 1100 Hz + 1700 Hz
ST 1500 Hz + 1700 Hz
STP(ST’) 900 Hz + 1700 Hz
ST2P(ST”) 1300 Hz + 1700 Hz
ST3P(ST”) 700 Hz + 1700 Hz