Canon iR1600 Series Service Manual page 526

CHAPTER 13 TROUBLESHOOTING
b. G3 Signal Transmission Test
A press on '4' on the keypad from the MODEM NCU Test menu selects the G3 signal
transmission test. In this test, the following G3 signals from the modem are transmitted
using the telephone line terminal and the speaker. To select a different transmission speed,
use the keypad.
Keypad Transmission speed
0
1
2
3
4
5
6
7
8
The output level of individual signals is in keeping with the setting made
in service mode.
Memo
c. Tonal/DTMF Signal Reception Test
A press on '6' on the keypad from the MODEM NCU Test menu selects the tonal sig-
nal/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 mo-
dem.
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.
13-148
COPYRIGHT© 2002 CANON INC.
300 bps
2400 bps
4800 bps
7200 bps
9600 bps
TC7200 bps
TC9600 bps
12000 bps
14400 bps
000
changes from '0' to '1' in response to detection of a signal of 462 ± 25 Hz.
changes from '0' to '1' in response to detection of a signal of 1100 ± 30 Hz.
changes from '0' to '1' in response to detection of a signal of 2100 ± 25 Hz.
000
F13-505-08
2000 CANON iR1600/iR2000/iR1610/iR2010 SERIES REV.0 MAR. 2002