Yaesu VL-1000 OPERATING MANUAL

VL-1000
OPERATING MANUAL
YAESU MUSEN CO., LTD.
1-20-2 Shimomaruko, Ota-Ku, Tokyo 146-8649, Japan
YAESU U.S.A.
17210 Edwards Rd., Cerritos, CA 90703, U.S.A.
YAESU EUROPE B.V.
Snipweg 3, 1118DN Schiphol, The Netherlands
Unit 12, Sun Valley Business Park, Winnall Trading Estate Winchester, Hampshire, SO23 0LB, U.K.
YAESU GERMANY GmbH
Am Kronberger Hang 2, D-65824 Schwalbach, Germany
11th Floor Tsim Sha Tsui Centre, 66 Mody Rd., Tsim Sha Tsui East, Kowloon, Hong Kong
General Description
Congratulations! You are now the owner of the Yaesu VL-1000 Linear Amplifier, which brings you leading-edge technology for the ultimate in operating convenience and reliability. We appreci­ate your investment in Yaesu equipment, and wish you many years of satisfying operation using your new amplifier!
The VL-1000 is an all-solid-state linear amplifier operating on the 160 through 6 meter amateur bands (USA version: 160-15 meters) at a power output level of 1000 Watts on CW and SSB (500 Watts on continuous data modes such as RTTY). The VL-1000 includes a built-in antenna tuner with 240 memories for tuning data, and microprocessor control of the tuning circuitry. The VL­1000 features input jacks for two different exciters, as well as four antenna jacks for connection of antennas for different bands. Extensive self-test, system monitoring, and protection circuits are provided, with status and tuning information being displayed on a huge Liquid Crystal Display panel.
The separate VP-1000 Power Supply Unit provides the +48 Volts required by the PA transis­tors, as well as all required control voltages for the amplifier. The VL-1000 normally is powered via 220 Volt AC mains, although it can be operated, at the 500 Watt level, from 117 Volt AC power.
We encourage you to read this manual thoroughly before beginning installation and operation of your VL-1000 Linear Amplifier. The details regarding proper installation and operating advice contained in these pages will help you derive maximum satisfaction from your new Yaesu equip­ment. Be certain to observe all due safety precautions when using this high-power device!
Supplied Accessories
Item Quantity
ALC Cable (T9101489; 2 m) 1 Band Data Cable (T9101487A; 8-pin DIN 1 8-pin DIN, 2 m) 1 Control Cable (T9101491; D-sub 15-pin 1 RCA, 2 m) 1
Page 1VL-1000 Operating Manual
Installation
The proper, safe installation of the VL-1000
is not difficult to accomplish, using the guide­lines to follow.
Caution!
Lethal AC and RF voltages are present within the cabinets of the VL-1000 Lin­ear Amplifier and VP-1000 Power Sup­ply. Use extreme caution when open­ing the cabinet(s) to perform any alignment or adjustment steps, and take particular care to inspect inter­connection cables frequently to en­sure that they are in good condition.
It is assumed that you possess tech­nical knowledge and experience con­sistent with your possession of an amateur radio license; this knowledge and experience are important tools which will aid in the successful instal­lation of this apparatus. Should you have any questions about the safe in­stallation of this equipment, consult your Yaesu dealer or seek the assis­tance of a professional installer.
However, the AC power cable/plug configu-
will
ration on the country in which you purchased your amplifier. In some countries, the VP-1000 is shipped with the standard 220 Volt connector appropriate for your location. In those areas where there are multiple 220 Volt connectors in common use, the VP-1000 is shipped
the power connector; one may be obtained
out
at a local hardware or electrical supply store.
Pictorial diagrams of the common 220 and 117 Volt AC connectors in use are shown be­low. When wiring your own connector, be ab­solutely certain to observe the proper polarity on the pin connections. Consult with an electri­cian if you have any doubts about your wiring!
Be sure that your house wiring is capable of sufficient current capacity on the 220 Volt circuit to be used, especially if this circuit is shared with household appliances. It always is preferable to operate the VL-1000 from a dedicated 220 Volt circuit with its own circuit breaker.
be somewhat different, depending
with-
AC Power Connections (using VP-1000 Power Supply)
The VL-1000 is usually operated from 220 Volt (nominal) AC power. With 220 Volt input to the VP-1000 Power Supply, full (1000 W) power output will be obtained from the VL­1000, while 117 Volt input to the VP-1000 is possible at the 500 Watt power output level.
The advanced switching-regulator power supply used in the matching VP-1000 Power Supply does not require any transformer re­wiring, nor any changing of a switch position; the power supply will operate from either 220 or 117 Volt line voltages without configuration changes.
Transceiver or Exciter Interconnections
The interface wiring to the transceiver or trans-
mitter which drives the VL-1000 consists of: (A) A 50 coaxial cable for carrying RF drive
power from each exciter to the amplifier;
(B) A 2-conductor transmit/receive control
cable which provides a closure to ground signal from the transceiver to the ampli­fier during transmission;
(C) A (supplied) 2-conductor ALC (Automatic
Level Control) line, used to limit the drive level from the exciter to the amplifier; and
(D) When using a compatible Yaesu trans-
VP-1000 AC Cable wiring
(U.S.A version)
USA Plug
UK Plug Australian
(viewed from plug prong side)
European
Plug
Plug
(European version)
Page 2 VL-1000 Operating Manual
Installation
ceiver, a B nected which provides automatic band change and T/R control (thus eliminating the need for cable (B) above), and +48 V DC supply voltage On/Off control (if the REMOTE switch on the rear panel of the VL-1000 is set to the ON position).
Typical installation diagrams are shown below. When two exciters are utilized, be cer­tain that all the cables from exciter #1 are con-
AND DATA cable may be con-
nected to the INPUT 1/PTT 1/ALC 1 jacks, and that all cables from exciter #2 are connected to the INPUT 2/PTT 2/ALC 2 jacks. When us- ing a B do not need the PTT cable for the correspond­ing exciter, as the T/R control signal will be made via the B
AND DATA cable for interconnection, you
AND DATA cable.
FT-920/VL-1000
FT-1000MP/FT-650/VL-1000
Page 3VL-1000 Operating Manual
Installation
Antenna Connections
As many as four HF or 50 MHz antennas
may be connected to the rear panel Antenna jacks, labeled ANT 1 ~ ANT 4. The antenna to be used on a particular band will be memo­rized once you make the selection manually via the front panel ANT switch. See the “Op- eration” section of this manual for more de­tails.
ALC Connections
The VL-1000 provides negative-going ALC,
which provides a negative voltage to the ex­citer which begins to appear when sufficient drive power from the exciter is being received; the voltage becomes of greater (negative) magnitude if the drive is increased, so as to prevent overdrive of the amplifier. The voltage range provided from the VL-1000 is 0 to -10 Volts DC, and this is compatible with all Yaesu transceivers as well as many exciters of other manufacture. At 1000 Watts of output power, the typical voltage generated for use with Yaesu transceivers is about -4 V DC.
connections labeled TX GND on the rear panel
not
of the transceiver; do
transceiver’s
input
PTT plifier control.
PTT jack, as it was designed for
(via a footswitch, etc.), not for am-
, however, use the
Automatic Amplifier Tune-Up
If you connect the supplied control cable between the transceiver’s P and the VL-1000’s BAND-DATA 2 jack, the transceiver will automatically transmit when you press the amplifier’s front panel F SET key (make sure that the M ceiver is set to CW, RTTY, or some other con­tinuous mode, and set the D control fully clockwise, if you want to perform antenna tuning). To accomplish this function, pin 11 of the BAND-DATA 2 jack closes the transceiver’s P placing the transceiver in the transmit condi­tion.
TT or REMOTE jack to ground, thus
TT or REMOTE jack
ODE switch of the trans-
RIVE or R F PWR
The ALC cable must be connected be-
tween the transceiver and VL-1000 to prevent overdrive of the amplifier, and espe­cially to facilitate the proper operation of the protection circuitry if sudden antenna system problems should cause the SWR to rise to dan­gerous levels.
PTT Connections
These jacks, labeled PTT 1 and PTT 2, ac­cept T/R control signals from your exciter. Grounding the center pin of one of these PTT jacks will cause the amplifier to be placed in the “Transmit” mode.
These jacks utilize a positive voltage (+5V DC) at very low current (10 mA maximum), so they are compatible with most open-collector NPN transistor amplifier control circuits in modern transceivers. Mechanical relays may also be used, so long as they are “floating” contacts that do not apply a voltage to the VL­1000’s PTT jacks. On Yaesu transceivers, use either the transistor or relay (Normally Open)
Automatic Amplifier Tune-Up using FT-1000MP Transceiver
When using the VL-1000 in conjunction with the FT-1000MP transceiver, the front panel F SET key may be used to initiate an automatic tuning procedure for the amplifier. In order to accomplish this, Menu Item 7-9 on the FT­1000MP must be set to “ default value), and a control cable must be con­nected between the FT-1000MP’s R and the VL-1000’s BAND-DATA 2 jack. The required wiring for this cable is shown below.
KEYER
” (which is its
EMOTE jack
Page 4 VL-1000 Operating Manual
Plug Pinout
BAND-DATA 1 CONTROL
⑦⑧
BAND-DATA 2 DC48V IN
+13.5VTX GNDGNDBAND DATA ABAND DATA BBAND DATA CBAND DATA DTX INH
as viewed from rear panel as viewed from rear panel
+13.5VTX GNDGNDBAND DATA ABAND DATA BBAND DATA CBAND DATA DTX INHF SET COMMONF SET 1 F SET 2NCNC NCGND
RCA Plug
NC GNDREMOTEPS ALARMLOW POWERGND12V INPUT+12V INPUT
+ 48V INPUT+ 48V INPUT+ 48V INPUT+ 48V INPUTGNDGNDGNDGND
as viewed from rear panel
as viewed from rear panel
Page 5VL-1000 Operating Manual
Front Panel Controls and Switches
1. POWER Switch
This switch turns the VL-1000 on and off. When the amplifier is turned off, the INPUT 1 jack is connected directly to the ANT 1 jack. If using a Yaesu transceiver with a B cable, the VL-1000 AC power will be remotely controlled by the when the REMOTE switch on the rear panel of the VL-1000 is set to ON.
transceiver’s
AND DATA
power switch
2. OPERATE Switch
Pressing this switch activates the power am­plifier section of the VL-1000. When the power amplifier is activated, “OPERATE” will appear on the display. Press this switch again to turn off the power amplifier section.
3. DIM Switch
This switch selects the brightness level of the LCD display. In low-light situations, acti­vating the Dimmer may reduce excess bright­ness in the display. For normal room lighting, however, the Dimmer should be set to OFF for best visibility.
4. LOW Switch
This switch selects the RF output power. When in the LOW position, the RF output power will be reduced to (approximately) 500 watts PEP, and “LOW” will appear on the dis­play.
Note:
This switch should be set to the LOW position when operating from a 100 ~ 117 VAC power source.
5. INPUT Switch
Press this switch to toggle between the ex­citers connected to the INPUT 1 and INPUT 2 connectors on the rear panel. The indicator “INPUT 1” or “INPUT 2” will appear on the dis­play to indicate which exciter is in use.
6. ATT Switch
This switch activates a 3 dB input RF power attenuator, to reduce excessive input power from the exciter. It should be on if exciter out­put exceeds 100 watts PEP, as is the case when using the FT-1000/D. The “ATT” indica- tor will appear on the display when this switch is on.
Page 6 VL-1000 Operating Manual
Front Panel Controls and Switches
7. ANT Switch
This switch can be used for manual selec­tion of up to four antennas. The antenna se­lection is stored in memory, so once selected and matched on a particular band, the same antenna will be reselected automatically when recalling that band. One of the indicators “ANT 1” to “ ANT 4” will appear on the display to indi­cate which antenna is in use.
8. DISPLAY 1 Switch
Press and hold
copy the current display into Display Memory #1. Press this switch Display Memory 1 data to the display. This switch is also used for alignment of the ALC system, if needed.
this switch for ½ second to
momentarily
to recall the
9. DISPLAY 2 Switch
Press and hold
copy the current display into Display Memory #2. Press this switch Display Memory 2 data to the display. This switch is also used for alignment of the ALC system, if needed.
this switch for ½ second to
momentarily
to recall the
10. DISPLAY SELECT Switch
This switch is used to select the display function, with the selections being provided in the following sequence:
Multi Meter 1
When using the Grapfical SWR Meter dis-
press and hold
play, to change the frequency span of the meter.
this switch for ½ second
11. TUNER Switch
Pressing this switch places the antenna tuner in the transmit signal path. When the antenna tuner is activated, the “TUNER” indi­cator appears on the display. Press this switch again to turn off the antenna tuner.
12. TUNE Switch
This switch activates the auto-tune system manually. Normally, when the operating band is changed, the tuner will automatically adjust itself for the same antenna selection and matching impedance which was set the last time that band was used. Press this switch to retune if you are on a different part of the band, or if the SWR is still too high after automatic tuning. Manual-restart with this switch can be used to “force” rematching of the impedance presented by the antenna system at any time.
13. F SET Switch
Press this switch to activate the exciter and tune up the VL-1000 automatically when us­ing the FT-1000MP (with the cable shown on page 4 connected between the BAND DATA 2 jack on the VL-1000 and R FT-1000MP).
EMOTE jack on the
È
Multi Meter 2
È
PO Meter 1
È
PO Meter 2
È
Graphical SWR Meter
È
Multi Meter 1
È
14. CONTRAST Knob
This knob used to adjust the LCD contrast.
15. LCD Display
The upper half of the display consists a 320 x 60 dot-matrix display showing operating sta­tus of the VL-1000, including the Graphical SWR meter. The lower half contains various icons representing enabled features.
Page 7VL-1000 Operating Manual
Rear Panel Connectors and Switch
1. ANTENNA Jacks
Connect these type M (SO-239) jacks to your antennas using large (RG-213 or larger) 50 impedance coaxial cable with mating plugs (Type M/PL-259).
2. REMOTE Switch
When this switch is in the ON position, the VP-1000’s +48V DC supply voltage will be con­trolled by the are using a Yaesu transceiver with a B cable.
transceiver’s
power switch if you
AND DATA
3. BAND-DATA 1 Jack
This 8-pin DIN jack provides for a supplied control cable for the Yaesu transceivers, to allow automatic band selection, T/R control, and power on/off control.
4. BAND-DATA 2 Jack
This D-sub 15-pin jack provides the same connections as does the BAND-DATA 1 Jack, plus additional connections for special appli­cations.
5. PTT Jacks
Shorting the center pins of these jacks to ground activates the amplifier for transmission. This function will normally be provided by am­plifier control contacts in the T/R relay (or open­collector NPN transistor) in the exciter. Open circuit voltage at this PTT jack is +5V DC, and maximum closed circuit current required is 10 mA.
6. ALC Jacks
These RCA jacks provide the ALC (output) voltage for control of the exciter’s RF drive level. The ALC control voltage range is 0 to
-10 VDC.
7. GND Terminal Post
Connect this terminal to a good earth ground using the shortest practical length of heavy braided cable. All other station equip­ment should be grounded to the same ground system.
Page 8 VL-1000 Operating Manual
Rear Panel Connectors and Switch
8. INPUT Jacks
These type M (SO-239) jacks should be connected through a short 50 coaxial jumper to the (transmitting) antenna jack of the trans­ceivers.
9. CONTROL Socket
Connect this 8-pin Molex socket to the CON-
TROL socket on the Yaesu VP-1000 AC Power
Supply. This socket provides ±12V DC and control signals for the VL-1000.
10. DC48V IN Jack
Connect this 8-pin Molex socket to the OUT-
PUT socket on the Yaesu VP-1000 AC Power
Supply. This socket provides +48V DC sup­ply voltage for the power amplifier of the VL-
1000.
Operating Advice
For most operating situations, the REMOTE switch on the rear panel of the VL-1000 should
Off
be set to the “
remote power control). Before commencing initial checkout, verify that the R
OFF
.
If the R providing remote power actuation, Error Message #1005 (which warns of “Excessive PA DC Voltage”) will appear following the “Self Test” procedure. If you experience this situation, check to be sure that the R
EMOTE switch is on, and the VL-1000 is not connected to a Yaesu transceiver
” position (unless you have connected an appropriate BAND DATA cable for
EMOTE switch is
EMOTE switch has not accidentally been turned on.
Page 9VL-1000 Operating Manual
Operation
Preliminary Checks
Before switching on power, recheck all in­terconnections. Be certain that the ground, RF input, and ALC connection cables are all secure.
If using a Yaesu FT-980 transceiver for ex­citation, set the L to the (upper) Position 1. If using an FT­757GX(II) or FT-767GX, ensure that the L or L INEAR switch is depressed (Position 1). Other Yaesu transceivers do not require spe­cial switch setting on the transceiver prior to commencing amplifier operation
IN AMP switch on the rear panel
IN
Band Changes
By now, you have noticed that there is no
AND” switch on the VL-1000. Selection of the
“B frequency band is accomplished in one of two ways:
If using a Yaesu transceiver
DATA control cable, band selection and an-
tenna rematching will occur automatically
whenever you change bands on the trans-
ceiver. Similarly, the antenna last used by
the VL-1000 on each band will be reselected
when that band is recalled on the trans-
ceiver.
If you are using a transceiver
control cable, injecting a carrier from the
exciter for few seconds causes the VL-
1000’s microprocessor to count the input
frequency and automatically set the ampli-
fier up for operation on the appropriate
band.
Here are the appropriate procedures:
1. Set the MODE switch of the exciter to CW, and the D exciter so as to provide 50 Watts of less of drive power to the VL-1000.
2. Press the F SET key on the VL-1000 mo­mentarily, then press the P the exciter to activate the transmitter. If necessary, close your key to allow a car­rier to be transmitted for a few seconds.
3. The microprocessor of the VL-1000 will now detect the frequency of the input signal, and the amplifier will then set it­self to the matching band.
RIVE or R F PWR control of the
with
a BAND
without
a band
TT switch of
4. When the correct band appears on the VL-1000 display, release the exciter’s
TT switch so as to return to the receive
P
mode. Preliminary band setup is now complete.
If you attempt to band (for example, at 6.2 MHz), the VL-1000 will automatically be placed in the “THRU” mode, and no amplification will take place.
transmit
on an improper
Antenna Selection
Pressing the ANT switch repeatedly causes the VL-1000 to “toggle” between the rear panel antenna jacks. Just remember to select the correct antenna when making band changes during initial operation, and the VL-1000 will thereafter remember which of ANT 1 through ANT 4 should be selected when you return to that band.
When the amplifier is turned off, the default antenna selection is ANT 1. You may wish to consider putting a grounding-type coaxial switch in the coaxial line connected to the ANT 1 jack, so as to shunt static electricity or nearby lightning pulses to ground.
Fan Operation
The cooling fans for the amplifier and power supply are both thermostatically controlled. The thermostats are set to activate well before “dan­gerous” heat has built up inside the cabinets. It is quite normal for the fans to cycle on and off, occasionally, even during receive opera­tion. The fans also may continue to operate after the front panel power switch is turned off, this feature allows the complete dissipation of heat so as to ensure long life of the compo­nents.
Important Note
The VL-1000 requires input drive power of 50~60 watts. Please ensure that the trans­mitter used with this amplifier is capable of producing at least 60 Watts of drive power so as to ensure full output from the VL-1000.
When driving the VL-1000 with a transceiver which includes a built-in antenna tuner, please turn the transceiver’s antenna tuner off when using the VL-1000.
Page 10 VL-1000 Operating Manual
Operation
Metering
An extensive array of metering selections are available to the owner of the VL-1000. Pressing the DISPLAY SELECT switch allows you to choose from among these options. There are also two “Display Memory” switches on the front panel of the VL-1000, which you may use to store and recall your most-used metering choices. To store a meter selection, press
and hold in for ½ second
1 (or DISPLAY 2) switch until you hear a double beep. To recall the saved setting, just (momentarily) the DISPLAY 1 (or DISPLAY
2) switch.
Multi Meter 1:
m Peak and Average Power Output Bar Graphs
m Peak and Average Power Output Numeric
Displays
m PA Drain Current Bar Graph
PA Drain Voltage Bar Graph
m Current TX/RX Status
m SWR Numeric Display
m Current Frequency Band (Numeric Display)
Multi Meter 2:
m Peak and Average Power Output Bar Graphs
m Peak and Average Power Output Numeric
Displays
m PA Drain Current Bar Graph
m Current TX/RX Status
m SWR Bar Graph
m SWR Numeric Display
m Current Frequency Band (Numeric Display)
PO Meter 1:
m Peak and Average Power Output Bar Graphs
with Peak-hold Segment
m Peak and Average Power Output Numeric
Displays
m SWR Numeric Display
m Current TX/RX Status
m Current Frequency Band (Numeric Display)
the DISPLAY
touch
PO Meter 2:
m Peak Power Output Bar Graph (large) with
Peak-hold Segment
m Peak and Average Power Output Numeric
Displays
m SWR Numeric Display m Current TX/RX Status m Current Frequency Band (Numeric Display)
Antenna Tuning Meter:
m Current (changing) SWR Bar Graph m Pictorial display of relative positions of An-
tenna Tuner Variable Capacitors
m Current Frequency Band (Numeric Display)
Graphical SWR Meter:
m
Current Antenna Jack in Use (ANT 1 ~ ANT 4)
m Display of “TUNER OUT” SWR (Dots on Graph) m Display of “ TUNER IN” SWR (Dashes on
Graph, this indicator does not indicate when SWR is above 1.5:1.)
m Current Frequency Band (Numeric Display) m User-Defined Span on Band Display
³
1.8 ~ 14 MHz: 100/500/1000 kHz (selectable)
³
14 ~ 28 MHz: 500/1000 kHz (selectable)
³
28 ~ 54 MHz: 1000 kHz (fixed)
Initial Amplifier S
ELF-TEST Protocol
When the VL-1000 is initially turned on, it enters a “ S amplifier’s microprocessor checks various as­pects of its control signals and supply voltages. If the amplifier’s self-test routine is success­fully completed, the following display will be shown:
ELF -TEST” mode, in which the
Page 11VL-1000 Operating Manual
Operation
Drive Power Check
If this is first-time operation, or whenever using a different exciter (transceiver), perform this procedure to check peak exciter driving power.
r Turn the VL-1000 POWER switch on by
pressing the switch in. r Make sure that the OPERATE and TUNER
switches on the VL-1000 are both off.
r Connect a 100-watt dummy load to the ANT
1 jack on the VL-1000, if available. If a
dummy load is not available, connect an
antenna which presents a 50 resistive
load to the ANT 1 jack. Tune your exciter to
a clear frequency. r Set the transceiver to the CW mode, and
preset the D
transceiver fully clockwise (maximum). r Briefly key the transmitter, while watching
the display of the VL-1000. If the (indicated)
exciter power is above 100 watts, turn the
ATT switch ON.
switch while transmitting.
Drive power must be at least 50 watts for accurate SWR detection, and 70 to 80 watts for optimum tuner performance. Full power output will be obtained from the VL-1000 when the drive power is between 50 and 80 watts, depending on the band in use. When the VL­1000 power amplifier section is activated, ALC voltage is fed back from the amplifier to the transmitter, to reduce power output to this level. However, much higher drive power to the am­plifier will cause the protective circuitry to dis­able the amplifier (to avoid damage to the in­put circuits). Therefore, when using an exciter delivering more than 100 Watts of drive power, the input attenuator should be used. With Yaesu transceivers, only the FT-1000/D se­ries should require the use of the attenuator, as the FT-1000/D is capable of up to 200 Watts of output power.
RIVE or RF PWR control on the
Never press the ATT
ALC Alignment
When this amplifier is used with Yaesu transceivers such as the FT-1000MP, FT-990, or FT-920, the ALC system normally will not require alignment. However, if it appears that full power is not being achieved due to exces­sive ALC action, you may align your VL-1000’s ALC system to that of your transceiver via this simple procedure:
r Connect the transceiver to the INPUT 1 jack,
and select “INPUT 1” via the front panel
INPUT switch. r Set the RF output power to the HIGH power
condition via the front panel LOW switch. r Press and hold in the INPUT switch for ½
second; this initiates the “ALC Alignment”
mode.
r Start with the transceiver’s D
control fully counter-clockwise, then rotate
RIVE or R F PWR control to the fully clock-
the D
wise position while transmitting. r If the power output from the amplifier (as
displayed on the AVG meter) does not reach
1000W because of the effect of the VL-
1000’s ALC voltage at full exciter drive, keep
the transceiver’s D
fully clockwise, then press and hold in the
DISPLAY 2 key until the power output from
the amplifier reaches 1000 Watts. r If, on the other hand, the ALC voltage from
the VL-1000 does not cause the exciter
drive to be controlled such that the power
output from the amplifier limits at 1000
Watts, do the reverse procedure from that
just described. First, reduce the drive from
the exciter until the VL-1000’s power out-
put is 1000 Watts. Next, press and hold in
the DISPLAY 1 key until the output power
from the amplifier is just reduced from the
1000 Watt level. Now set the transceiver’s
RIVE or RF PWR control fully clockwise, and
D
press the DISPLAY 1 key (to increase ALC
voltage/decrease power output) or DISPLAY
2 key (to decrease ALC voltage/increase
power output) until the power output from
the amplifier reaches 1000 Watts (these
tuning procedures should be as short as
RIVE or RF PWR control
RIVE or RF PWR
Page 12 VL-1000 Operating Manual
Operation
possible).
r Return the input transceiver to the receive
mode.
r Press the LOW switch to select LOW power
operation.
r Again transmit a carrier at full drive power;
press the DISPLAY 1 or the DISPLAY 2 key, as needed, until the power output from the amplifier reaches 500 Watts. Now re­turn the exciter to the receive mode.
r Press and hold in the INPUT switch for ½
second to exit the ALC Alignment mode.
r You can align the ALC voltage of the trans-
ceiver that is connected to the INPUT 2 jack in the same way. First select “INPUT 2” via the front panel INPUT switch, then follow the same procedure as described above.
Initial Antenna Matching Procedure
r Briefly key the transmitter, while watching
the SWR indicator in the display of the VL­1000 (SWR calculation is automatic, so no full-scale presetting is necessary). If the SWR is above 1.5:1, activate the An-
r
tenna Tuning Unit to retune the impedance presented by the antenna system, as follows;
Press the TUNER switch;
À
Press the TUNE switch;
Á
Transmit a carrier from the exciter in the
Â
CW or other continuous mode. Do not attempt to perform antenna tuning by whistling into the microphone in an SSB mode, as the drive power delivered to the antenna tuner’s microprocessor will not be consistent.
During antenna tuning, a special Antenna
r
Tuning Meter display will be observed, show­ing the progress of the SWR reduction as well as showing a depiction of the relative positions of the two Variable Capacitors in the antenna tuner (VC-A and VC-B).
tuning” (A/T) SWR conditions present at the VL-1000’s current antenna jack will be shown. As you move around the band, new antenna tuning settings will be recorded on the Graphical SWR Meter, giving you a clear picture of the tuning action of the VL-1000’s automatic antenna tuner.
r If “COMPLETE” does not appear, it means
that an excessively-high SWR exists on the coaxial line; “ERROR” will appear on the dis­play, and either “HI SWR” or “PROTECT” will come on to assist you in knowing the exact nature of the fault. If either of these warn­ing messages should appear on the display, check the antenna, feedline, and antenna connection.
r If “COMPLETE” appears after tuning, press
the OPERATE switch. The VL-1000 is now ready for operation.
Note
: During antenna tuning, the tuning car­rier is passed through the power amplifier then fed to a 20dB power attenuator circuit to mini­mize interference to other operators; this power reduction takes place even if the OPERATE switch is on.
r At the completion of the tuning process,
COMPLETE” will appear on the display. Once tuning has been successfully com­pleted, the display will shift to the Graphical SWR Meter automatically. In this mode, both the “before tuning” (THRU) and “after
Page 13VL-1000 Operating Manual
Operation
Linear Amplifier Operation
Although continuous full exciter power is re­quired for accurate SWR measurement and antenna matching, this will cause overheating if transmitting for an extended period when OPERATE switch is depressed (that is, when the power amplifier section is on). So once the antenna has been matched the first time, reduce the setting of the exciter’s D PWR control if you contemplate operation us­ing a continuous-carrier operating mode (see the guidelines below).
For SSB and CW operation
adjust the M transceiver for proper ALC indication on the transceiver ALC meter, as described in the transceiver manual. Generally, for SSB, the ALC meter indication should not deflect be­yond a certain ALC limit (the “ALC” zone on the transceiver’s meter) on voice peaks; on CW, the ALC indication should be just enough to cause slight meter deflection. Higher ALC levels may produce distortion or key clicks, without producing any additional power output.
IC GAIN and/or DRIVE control on the
RIVE or RF
, make sure to
Beeper on/off
When you press a switch, the beeper pro­vides useful audible feedback to confirm that the switch was successfully activated.
If you want to turn the beeper off, first turn the VL-1000 off, then DISPLAY 1 and DISPLAY 2 switches while you turn the VL-1000 on. To turn the beeper back on again, repeat this switch-on procedure.
press and hold in
the
Resetting the CPU
The VL-1000 can be reset so as to clear all settings, display memories, and antenna tuner data; these will be reset to their factory de­faults.
To reset the microprocessor,
the OPERATE and DIM switches while you
in
turn the VL-1000 on.
press and hold
For FM, SSTV, RTTY, AMTOR or packet
press the LOW switch to select the LOW power condition to prevent the overheating during continuous operation for extended periods.
For AM operation
PWR control on the transceiver so that the AVG
power meter on the VL-1000 does not exceed 250 watts when transmitting a carrier. On voice peaks, adjust the M ceiver so that the PEAK power meter on the VL-1000 does not exceed 1000 watts.
, adjust the DRIVE or RF
IC GAIN control on the trans-
,
Operating Precautions
Summarized below are some precautions to adhere to in order to ensure long life and trouble­free operation with the VL-1000.
r Do not transmit, after changing bands, until “COMPLETE” appears on the display. r Do not transmit when turning the POWER switch or the ATT switch on or off. r When changing bands, always make certain that the VL-1000 is set for the same band as
the transceiver before transmitting, and that the proper antenna is connected. Remem­ber that ANT 1 is automatically selected when the VL-1000 is switched off.
r Reduce the drive power or shorten transmissions if Warning Message #1001 appears on
the display (see next page).
Page 14 VL-1000 Operating Manual
WARNING Messages
If one of these messages should appear, a potentially serious situation is being experienced. Turn the amplifier off, correct the problem, then turn the amplifier back on. If the problem has, indeed, been corrected, full operation at the 1000 Watt power level should be restored.
r #1001: PROTECTION CIRCUIT DETECTS EXCESSIVE PA
The Power amplifier heatsink is overheated.
Reduce the drive power or shorten transmis-
sions to cooling the heatsink.
r #1002: PROTECTION CIRCUIT DETECTS SWR > 3:1
The SWR is too high (above 3:1). Check the
antenna, feedline, and coaxial cable
connector(s).
r #1003: PROTECTION CIRCUIT DETECTS PA UNIT IMBALANCE
More than 50 watts of imbalance has occurred
among the four sections of the power ampli-
fier. A transistor or LPF Unit power combiner
failure may be responsible.
r #1004: PROTECTION CIRCUIT DETECTS EXCESSIVE DRIVE POWER
The recommended drive level from the exciter
(transceiver) has been exceeded. Reduce the
drive level or set the ATT switch to the ON po-
sition.
r #1005: PROTECTION CIRCUIT DETECTS EXCESSIVE PA DC VOLTAGE
The recommended Drain Voltage of the final
amplifier has been exceeded. Check the power
supply voltage regulator and associated cir-
cuitry.
r #1006: PROTECTION CIRCUIT DETECTS EXCESSIVE PA CURRENT
The recommended Drain Current of the final
amplifier has been exceeded. Check the power
FETs and associated circuitry.
r #1007: PROTECTION CIRCUIT DETECTS POWER SUPPLY FAILURE
The VP-1000 or its interconnection to the VL-
1000 has failed. Check the cable connection
from the VL-1000 and/or the VP-1000. This
Warning only appears when using the Yaesu
VP-1000 power supply unit.
r #1008: PROTECTION CIRCUIT DETECTS BAND SELECTION ERROR
The VL-1000 and the transceiver are set up
with conflicting band selection, due to a logic
error in the Band Data matrix, a failure in the
AND DATA cable, or similar problem. The VL-
B
1000 is placed in the "Thru" mode automatically when this occurs.
Page 15VL-1000 Operating Manual
Specifications
General
Frequency Coverage: 160 ~ 6 Meter Amateur Bands
(USA Version: 160 ~ 15, 6 Meter Amateur Bands)
Power Output: 1000 Watts @ 220V AC Input to VP-1000 Power Supply Continuous Transmission Period: 100% @ 500 W for 1 hour Case Size (WHD): 410 x 135 x 439 mm Weight (Approx.): 21 kg Supply Voltage: +48 VDC, +12 VDC, -12 VDC Power Consumption (Max.): 48 A @ +48 VDC, 2.8 A @ +12 VDC, 0.1 A @ -12 VDC
Linear Amplifier Section
Excitation Power: 50 ~ 80 Watts ALC Voltage (output) Range: 0 to -10 V (Nominal -4V @ 1000 W output) Spurious Radiation: less than -50 dB @ 160 ~ 10 Meter Amateur Bands
less than -60 dB @ 6 Meter Amateur Band
Third-order IMD: less than -30 dB @ 1000 W PEP (Typical) Input/Output Impedance: 50 Ω, unbalanced
Automatic Antenna Tuner Section
Impedance Matching Range: 16 to 100 , unbalanced @ 160 Meter Amateur Band
16 to 150 , unbalanced @ 80 ~ 10 Meter Amateur Bands 25 to 100 , unbalanced @ 6 Meter Amateur Band
Frequency Range: 160 ~ 6 Meter Amateur Bands Matching Time: less than 10 seconds Matched SWR: 1.5:1 or better Tuning Memory Register: 240 channels
Specifications are subject to change, in the interest of technical improvement, without nortice or oblogation.
CAUTION!
Changes or modifications to this device not expressly approved by Yaesu Musen could void the user’s authorization to operate this device.
Page 16 VL-1000 Operating Manual
Copyright 1997 Yaesu Musen Co., Ltd. All rights reserved
No portion of this manual may be reproduced without the permission of Yaesu Musen Co., Ltd.
Printed in Japan E08971000
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