Page406 of 544 NT5K21XMFC/MFE card
553-3011-100 Standard14.00 January 2002
XMFE sender and receiver specifications

Tables127 and Table 128 provide the operating requirements for the XMFC/

MFE card when it is co nfigured as an XMFE card. These requirem ents

conform to French Socotel specifications ST/PAA/CLC/CER/692.

Table 1 27
XMFE sender specifications
Forward frequencies in OG mode: 700, 900, 1100, 1300, 1500 Hz
Forward frequencies in IC mode: 1900 Hz
Frequency tolerance: +/- 0.25% from nominal
Power level at each frequency: Selectable: 1 of 16 levels
Level tolerance: +/- 1.0 dB
Harmonic Distortion and Intermodulation: 35 dB below level of 1 signaling frequency
Time interval between start of 2 tones: 125 usec.
Time interval between stop of 2 tones: 125 usec.
Table 1 28
XMFE receiver specifications (Part1 of 2)
Input sensitivity:
accepted:
rejected:
rejected:
rejected:
-4 dBm to -35 dBm +/- 10 Hz of nominal
-42 dBm signals
-4 dBm outside 500-1900 Hz
-40 dBm single/multiple sine wave in 500-1900 Hz
Bandwidth:
accepted: fc +/- 20 Hz
Amplitude twist:
accepted: difference of 9 dB between frequency pair
Operating time: < 64 msec.
Release time: < 64 msec.
Tone Interrupt causing no
release: < 8 msec. Receiver on, tone missing