Vertex Standard VX-800, Руководство по обслуживанию

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22
Alignment
Channels
The following parameters may be adjusted individu-
ally for each channel. For example, minor variations
in the power output across the operating band may
be equalized by following this section’s instructions.
(2) Channels TX :
- [0] T
X
H
I
P
OWER
T
RIM
This parameter is used to trim Tx power on the
displayed channel. From the “
(2) Channels Tx
”
section, select [
0
] to adjust the “
T
X
Hi Power Trim
”
setting(s).
• Use the [
W
] or [
X
] key to select the channel to
be adjusted.
• Press the [
space
] key on the keyboard to acti-
vate the transmitter.
• Press the [
S
] or [
T
] key, as needed, to trim the
power output to the power that is programmed
by CE31 channel editor, as indicated on the ex-
ternal wattmeter.
• Press [
ENTER
] to lock in the new data.
- [1] T
X
L
OW
P
OWER
T
RIM
(L1, L2 or L3)
This parameter is used to trim Tx power on the
displayed channel. From the “
(2) Channels Tx
”
section, select [
1
] to adjust the “
T
X
Low Power
Trim
” setting(s).
• Use the [
W
] or [
X
] key to select the channel to
be adjusted.
• Press the [
space
] key on the keyboard to acti-
vate the transmitter.
• Press the [
S
] or [
T
] key, as needed, to trim the
power output to the power that is programmed
by CE31 channel editor, as indicated on the ex-
ternal wattmeter.
• Press [
ENTER
] to lock in the new data.
- [2] M
AXIMUM
D
EVIATION
T
RIM
This parameter is to trim maximum deviation on
the displayed channel. From the "
(2) Channels Tx
"
section, select [
2
] to adjust the deviation level.
• Use the [
W
] or [
X
] key to select the channel on
which you wish to adjust the deviation.
• Press the [
space
] key on the computer keyboard
to start alignment. This activates the transmit-
ter, and injects a 1 kHz test tone.
• Press the [
S
] or [
T
] key, as needed, to set the
deviation to the desired value (typically 3.9~4.2
kHz, or 2.0~2.3 kHz for "narrow band" channels).
• When the desired deviation level is attained,
press [
ENTER
] to lock in the new value.
- [2] S
UB
A
UDIO
D
EVIATION
T
RIM
This parameter used to is to trim Subaudible de-
viation on the displayed Sub-audio channel. From
the "
(2) Channels Tx
" section, select [
2
] to adjust
the Subaudible Deviation level.
• Use the [
W
] or [
X
] key to select the channel on
which you wish to adjust the Subaudible Devia-
tion.
• Press the [
space
] key on the computer keyboard
to start alignment. This activates the transmit-
ter, and injects a subaudible test tone.
• Press the [
S
] or [
T
] key, as needed, to set the
deviation to the desired value (typically 0.6±0.2
kHz, or 0.4±0.2 kHz for "narrow band" channels).
• When the desired deviation level is attained,
press [
ENTER
] to lock in the new value.
(3) Channels Rx :
- [0] M
ANUAL
T
UNING
This parameter is used to tune the RF front-end
components for the current channel manually.
From the "
(3) Channels Rx
" section, select [
0
] to
peak the receiver performance.
• Use the [
W
] or [
X
] key to select the channel on
which you wish to adjust the front end alignment.
• Connect the signal generator to the Antenna
jack, and set its level to +20 dBµ EMF (5 µV).
• Press [
ENTER
] to lock in the new data.
(4) Other :
- [0] B
ATTERY
W
ARNING
L
EVEL
This parameter sets the battery warning level.
From the "
(4) Other
" section, select [
0
] to align
the battery warning voltage sensor.
• Set the DC supply voltage to 6.5 Volts.
• Press [
ENTER
] to lock in the new data.