RXRL-NV/2 Technical and Maintenance Manual
R.V.R. Elettronica S.r.l. (Bo)
Pag. 38
and R/L).
18) Inject a carrier at the receiver’s operating frequency, modulated
by a 400 Hz tone with a deviation of ±100 KHz.
19) If necessary, adjust R71 to improve the stereo separation, using
the procedure described in step 16.
20) Inject a modulation signal with a frequency from 40Hz to 15KHz and
verify that the stereo separation is always grater than 40dB.
5.7 CALIBRATION OF THE CPU
After replacement, check that the displays function and that operating
frequencies can be programmed using the UP (14 Fig.1), DOWN (12 Fig.1) and
ENTER (13 Fig.1) buttons.
Check correct operation of the RS232 serial port (if fitted).
No other checks are required.
5.8 CALIBRATION OF THE ANAMETER CARD
For each of the selector positions adjust the corresponding trimmer for
the values listed below:
READING
V A L U E
F S D
T R I M M E R
N O T E
+15V
15V
30V
R18
+5V
5V
30V
R17
EXT 24V (OPT) 24V
30V
R22
SIGNAL
1mV
1mV
R21
CENTER
BLACK MARK
R16
1
SCA
R15
2
MONO
R19
3
MPX
R20
4
NOTE:
1)
The reading is valid at the half-way point on the horizontal black
mark on the meter scale.
2)
If the receiver does not have a dedicated SCA output, it is not
possible to measure the SCA level on the Modmeter.
If present however, inject a 67-70 KHz signal with a deviation of
10KHz, select SCA measurement with the front panel selector and
select x10 with the Modmeter selector.
Configure the unit as detailed in SETUP 7 (Fig.11).
Summary of Contents for RXRL-NV/2
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