5 - 3
ADJUSTMENT
OPERATION
VALUE
REFERENCE
FREQUENCY
[REF]
1 • Connect a frequency counter to the J5 connector on the MAIN-A
UNIT (see the illust below).
10.25000 MHz
2 • Push
[TS•MODE]
/
[SET•SKIP]
to store the set value.
BPF
[LT1]–[HTF]
1 • Preset the adjustment items as below before the “BPF“ adjustment.
[AGA]
:
“8A”
[IFA]
:
“25”
Automatic adjustment
2 • Connect an SSG to the antenna connector “ANT1” and set as;
Frequency
: Specifi ed frequency*
Modulation :
none
Level
: Specifi ed level
†
3 • Push
[TS•MODE]
/
[SET•SKIP]
to store the adjustment value.
4 • Repeat 2–3 for each specifi ed frequency and level for [LT1] to [HTF].
AGC GAIN
(FM)
[AGF]
1 • Connect an SSG to the antenna connector and set as;
Frequency
: Specifi ed frequency*
Mode
:
FM
Modulation :
1
kHz
Deviation :
3.5
kHz
Level
: +34 dBµ (–73 dBm)
‡
50 mW
2 • Connect a speaker and milliwatt meter then set the audio output level
to 50 mW with
[VOL]
.
3 • Push
[SET•LOCK]/[MAIN•NB]
to select next adjustment item.
(AM)
[AGA]
4 • Set the SSG as;
Frequency
: Specifi ed frequency*
Mode
:
AM
Modulation :
1
kHz
Deviation :
70%
Level
: +34 dBµ (–73 dBm)
‡
50 mW
5 •
•
Set the audio output level to 50 mW with
[DIAL]
.
Verify that the demodulated audio signals are not distorted badly.
6 • Push
[TS•MODE]/[SET•SKIP]
to store the adjustment value.
IF GAIN
(FM)
[IFF]
1 • Set the SSG as;
Level
:
OFF
50 mW
2 • Connect a speaker and milliwatt meter then set the audio output level
to 50 mW with
[VOL]
.
3 • Push
[SET•LOCK]/[MAIN•NB]
to select next adjustment item.
(AM)
[IFA]
4 • Set the audio output level to 80 µW with
[DIAL]
.
80 µW
5 • Push
[TS•MODE]/[SET•SKIP]
to store the adjustment value.
5-2 MAIN-A UNIT ADJUSTMENT
*Displayed on the controller's display.
J5
2EMOVETHESHEILDCOVER
-!).!5.)4
‡
The output level of the standard signal generator (SSG) is indicated as the SSG's open circuit.
–
†
Refer to the “ADJUSTMENT ITEM LIST“ on page 5-7.
