Canon iR1200 Series Service Manual page 134

CHAPTER 2 USING THE MACHINE
3.21.6.4 DTMF Signal Transmission Test
A press on '5' on the MODEM NCU Test menu selects the DTMF signal transmission
test. In the test, the following DTMF signals from the modem are transmitted using the tele-
phone line terminal and the speaker. The number pressed on the keypad selects a specific
DTMF signal.
The output level of individual signals is in keeping with the setting made in
service mode.
Memo
3.21.6.5 Tonal/DTMF Signal Reception Test
A press on '6' on the keypad from the MODEM NCU Test menu selects the tonal signal/
DTMF signal reception 0 test. In this signal, the tonal signal/DTMF signal received from the
telephone line terminal can be checked to find out if it was detected by the modem.
Tonal signal reception test
4-6 : TONE Rx
0 0 0
DTMF signal reception test
4-6 : TONE Rx
1 2 3 4 5 6 7 8 9 0
The received DTMF signals are indicated
starting from the right using the 2nd
character of the display.
2-86
COPYRIGHT © 2002 CANON INC.
000
changes from '0' to '1' in response to detection of a signal of 1300 ± 25 Hz.
changes from '0' to '1' in response to detection of a signal of 400 ± 30 Hz.
changes from '0' to '1' in response to detection of a signal of 1100 ± 25 Hz.
000
F02-321-11
2000 2000 2000 2000 CANON iR1200/iR1300 Series REV. 0 AUG. 2002