Modem And Ncu Tests - Canon MP 700 Service Manual

MultiPASS MP730/MP700 Chapter 4: Maintenance and Service

6.2.6 Modem and NCU Tests

The Modem and NCU Test menu is selected by pressing the numeric key 4 from the test mode
menu. These tests test modem and NCU transmission and reception. The modem tests check
whether signals are sent correctly from the modem by comparing the sound of the signals from
the speaker with the sounds from a normal modem. Also, you check on the display whether or
not the modem correctly detected received tone signals and DTMF signals.
End this test by pressing the Stop/Reset key.
Modem test type
Frequency test
G3 signal transmission test
Tonal signal/DTMF signal reception
tests
V.34 G3 signal transmission test
a) Frequency test
The frequency test menu is selected by pressing the numeric key 2 from the MODEM NCU
test menu. Signals of the frequencies below are sent from the modem using the modular jack
and the speaker. The frequency can be changed with the numeric keys.
Numeric key
1
2
3
4
5
6
7
The transmission levels for each frequency follow the service data transmission
level settings.
NOTE
Overview
The modem sends tonal signals from the modular
jack and the speaker.
The modem sends G3 signals from the modular
jack and the speaker.
The modem detects specific frequencies and
DTMF signals received from the modular
jack.
The modem sends V.34 G3 signals from the
modular jack and the speaker.
Frequency
462 Hz
1100 Hz
1300 Hz
1500 Hz
1650 Hz
1850 Hz
2100 Hz
4-52