Functional Test; Modulation - Philips PM 5330 Handbuch

3-2
OPERATING INSTRUCTIONS PM 5330
3.4
BRIEF CHECKING PROCEDURE
3.4.1
General Information
The purpose of this operation is to quickly check the instrument functions. It is assumed that
the operator is familiar with the instrument and its characteristics. If the test is carried out
shortly after power on, test steps may be out of specification, due to insufficient warm-up
time.
WARNING: Before switching on ensure that the instrument has been installed in
accordance with the instructions mentioned in Chapter 1 .
3.4.2
Functional Test
Immediately after power-on, a selftest routine is performed. After that the instrument auto-
matically recalls operating settings prior to last power-off (see Section 3.3)
If you prefer different operating settings, set new parameters now.
Example:
- frequency 10.5 MHz
- amplitude modulation
-
execution AM
- modulation int. or ext.
- modulation parameter
modulation /audio
frequency 2 kHz
modulation depth (m) 50
S~.
FRED
1 0
5
ENTER
~~1
If frequency is shown in kHz,
press key MHz/kHz before ENTER has been pressed
MODULATION
~, ,
ENTER
MODUlAT10N
~ ~
ENTER
MOD PARAMETER
Z
MOD PARAMETER
S
press so often until AM flashes
press until only AM flashes
ENTER
fl
0
ENTER
-
previous settings (e.g. output level) that remain unchanged do not need to be input again.
Connect an oscilloscope to socket RF OUT (Zo 50 SZ) and check the signal . If it is correct the
test is finished. If not, repeat the procedure with other settings.