Vertex Standard VX-900 - Manual (Page 24)

24
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 [t] or [u] key to select the channel to be
adjusted.
• Press the [space] key on the keyboard to activate
the transmitter.
• Press the [p] or [q] key, as needed, to trim the
power output to the power that is programmed
by CE39 channel editor, as indicated on the exter-
nal 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 [t] or [u] key to select the channel to be
adjusted.
• Press the [space] key on the keyboard to activate
the transmitter.
• Press the [p] or [q] key, as needed, to trim the
power output to the power that is programmed
by CE39 channel editor, as indicated on the exter-
nal 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 [t] or [u] 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 transmitter,
and injects a 1 kHz test tone.
• Press the [p] or [q] 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 [t] or [u] 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 transmitter,
and injects a subaudible test tone.
• Press the [p] or [q] key, as needed, to set the
deviation to the desired value (typically 0.6±0.1
kHz, or 0.4±0.1 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 [t] or [u] 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.
• Set the DC supply voltage to 7.5 Volts.