JRC JRL-2000F User manual

831~11dVVI 813111 ~Ii
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INTRODUCTION
~
Thank you for purchasing the JRL-2000F, the world's first MOSFET HF linear amplifier. JRC has
dssigned and produced the JRL-2000F based on its many years of achievements and experience
with professional transmitters and has taken advantage of
the latest design technology. Piease read
this manual carefully before operating your
new amplifier.
The JRL-2000F has been manufactured under the strictest quality control conditions. Should you
find any darnage to the amplifier or encounter any other problems, contact your dealer or nearest
JRC representative.
Acc ESSQ RI ES\ Each JRL-2000F is shipped with the followtng accessories
• lnstruction manual ......................................................................................................,..................1
•
Remote Control Unit (NCH-365) ................... -. .............................................................................1
•
Main fuse (15A) .............................................................................................................................2
•
Power amplifier unit fuse (15A) ...................................................................................................2
• Control cable plug and plug casing ..................................................:.......................................1
•
Dry cell batteries for remote control ..........................................................................................2
Piease check to make sure that all of the above items were received with your JRL-2000F.
I
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CONTENTS \
1. FEATURES ...............................................................................................................................1
2. SPECIFICATIONS ....................................................................................................................3
3. BEFORE USING THE JRL-2000F.......................................................,....................................4
3.1 Installation Location ...........................................................................................................4
3.2 Power Supply .....................................................................................................................4
3.3 Exciters ..............................................................................................................................5
3.4 Antennas ............................................................................................................................5
3.5 Grounding ..........................................................................................................................5
4. CONNECTION ..........................................................................................................................6
4.1 Connection to a JST-135 transceiver.................................................................................7
4.1.1 Connection diagram ...............................................................................................7
4.1.2 Control cabl!;l wiring diagram .................................................................................8
4.2 Connection to a Non-JRC Exciter ......................................................................................9
4.2.1 Connection diagram ...............................................................................................9
4.2.2 Control cable wiring diagram ...............................................................................
10
5. OPERATING CONTROLS AND FUNCTIONS .......................................................................14
5.1 Front Panel Controls ........................................................................................................ 14
5.2 Rear Panel Controls ......................................................................................................... 15
5.3 Remote Control Uni! (NCH- 365) ..................................................................................... 16
6. BASIC OPERATION ...............................................................................................................17
6.1 Preparation ...................................................................................................................... 17
6.2 Operation Modes .............................................................................;............................... 17
6.2.1 Operation of the POWER SUPPLY CONT. switch ................................................ 18
6.2.2 Antenna switch mode ........................................................................................... 18
6.2.3 Antenna tuner mode ............................................................................................. 19
6.2.4 Linear amplifier mode........................................................................................... 20
6.3 Automatie Tuning Operation ............................................................................................ 21
6.3.1 Automatie tuning procedures ...............................................................................22
6.3.2 JRL-2000F band assignment table ......................................................................24
6.4
SET Operation ..................................................................................................................25
6.5 Switching Antennas
.... ,....................................................................................................27
6.6 Adjusting the
ALC Level .................................................................................................. 28
6.7 Memory Backup .........................................,.....................................................................30
6.8 Precautions ......................................................................................................................
31
7. SPECIAL OPERATIONS ........................................................................................................32
7.1 Erasing Preset Data .........................................................................................................32
7
.1.1 Erasing all data for a selected antenna................................................................32
7.1.2 Erasing
all data for a selected frequency band ..................................................32
7.2 Write-protecting for Preset Data ......................................................................................33
7.3 Using the JRL-2000F as a Dummy Load .........................................................................33
7.4 Using More than 4 Antennas ...........................................................................................34
7.5 Setting the DIP Switches..................................................................................................35
8. PROTECTION FUNCTIONS ...................................................................................................36
8.1 Cooling Fans ....................................................................................................................36
8.2 Gauses of Alarms and Corrective Measures ...................................................................36
II
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9. PRECAUTIONS FOR MAINTENANCE AND OPERATION ................................................... 38
9.1 Cleaning the Main Unit ...................................................................................................38
9.2 Maintenance of the Interna! Circuits ...............................................................................39
9.3 Radio lnterference Precautions ......................................................................................39
9.4 Precautions Against Power Surge Caused by Lightening ..............................................39
10. PROBLEM SOLVING .............................................................................................................40
1 0.1 After-sales Service ...................................................................................................,......40
10.2 Troubleshooting ..............................................................................................................40
11. OPTIONS ................................................................................................................................ 41
12. ATTACHED DIAGRAMS ........................................................................................................42
12.1 External View ..................................................................................................................42
12.2 Block Diagram ................................................................................................................42
12.3 Connection Diagrams .....................................................................................................42
III
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1 FEATURES
e 48 RF Power MOSFETs
The power amplifier unit is equipped with 4 wide-band amplifier circuits (2SK408/2SK409),
each incorporating
12 high-voltage resistant RF power MOSFETs. As output gain is achieved
by electrically combining the output from these broad-band amplifiers, sufficient output margin
is available so that high-quality full duty cycle output throughout the entire power range is
possible.
• SEPP-type Low Distorfion Power Amplifier
Single ended push-pull (SEPP) circuits are employed. SEPP circuits do not have any of the
shortcomings of conventional transistor-type push-pull circuits, so the JRL-2000F obtains high
output power with superior
IMD chracteristics.
• Fully Automatie Antenna Tuner
The JRL-2000F is equipped with a fully automatic, instantly switching antenna tuner which
converts
the composite elements in the matehing circuit to the binary system. By storing matehing
data for each antenna
in the amp's high-capacity memory, antenna matehing can be done
instantaneously.
• Automatie Antenna Seleetor
Up to four antennas can be connected and selected by front panel switches. The selected
antenna setting can be stored
in memory along with the matehing data for the antenna tuner
to allow instant
QSY.
e Automatie Frequeney Counter System
A built-in frequency counter automatically reads the frequency of the input signal from the
exciter and selects the correct frequency band. Manual band changing is not required and
any exciter can be used with the JRL-2000F.
• High-Effieieney Switehing Power Supply with PFC
The power supply for the JRL-2000F is equipped with a Power Factor Corrector (PFC) which
corrects the
AC input waveform to a sine wave by using the active smoothing circuit method.
This increases the
AC line power factor, which previously attained only 50-60%, to almost
100%. This means that power consumption has been nearly halved compared to other
conventional power supplies.
With its high-efficiency MOSFET switching regulator, a maximum
continuous power supply output of 2.4
kW can be achieved when this exceptionally powerful
unit
is connected to 220 - 240V AC.
• Low Noise Design
The power amplifier and the power supply unit are equipped with MOSFETs which have higher
heat-resistance properties. This reduces the operating time
of the cooling fans significantly.
A low noise axial
fan mounted in the rear or the chasis also contributes to noise reduction.
Additionally, a full break-in circuit with a compact relay housed
in a shielded case reduces
relay operating noise.
·1-
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1 FEATURES
• Various Protection Circuits
The JRL-2000F incorporates several protection facilities in order to protect the circuitry against
internal and external stresses and overloads such as overdrive and abnormal output Ioads.
When one of the protection circuits is actuated in the PA unit, the gate bias of the power
MOSFETs are directly controlled, without slow-operating ALC feedback, in order to reduce
the power output. Therefore, should the ALC line not be conected, the PA unit will not suffer
any damage.
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2 SPECIFICATIONS
Operating frequency bands
Rated output power
Output impedance
Harmonics
Intermodulation distortion (IMD)
Input impedance
Exciting power
Frequency switching time
Power supply voltage
Power consumption
Input power factor
Temperature range
Protection circuits
Dimensions
Weight
1.8, 3.5, 7, 10, 14, 18 & 21 MHz amateur bands.
(24 & 28 MHz bands: antenna tuner only)
SSB 1 kW PEP* 100% duty cycle, 24 hour.
CW 1 kW* 100% duty cycle, 24 hour.
FSK/SSTV 1 kW* 100% duty cycle, 1/4 hour
50n unbalanced, VSWR 3.0 (16.7-150!2)
-60dB or less
-35dB or less below PEP (at 1 kW output)
50Q unbalanced
100W max.
Less than
0.1 sec.
85 to 264V AC, single-phase
2.5 kVA or less (at 1
kW output)
95% or more (at 1 kW output)
-10· to 4o·c
PA excess current; PA overheat; PA abnormal Ioad; AC
power supply excess voltage; power supply overheat;
PA failure; excessive antenna VSWR; exiciting power
excess; and antenna matehing anomaly.
430(W) X 300(h) X 402(0) mm
Approx. 28 kg
* Note: Rated output on 200-240V AC. The rated output power on 100--120V AC is 750
W
PEP
·3-
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3 BEFORE USING THE JRL-2000F
3.1 Installation Location
When determining a location for installing the JRL-2000F, please take the following criteria
into consideration:
• Avoid a place that
is exposed to direct sunlight or susceptible to overheating.
• Avoid humid or dusty places.
•
Do not place containers holding water or other liquids above or on top of the JRL-2000F.
•
The JRL-2000F draws cooling air in from the front panel and expels it from the rear. Therefore,
do not place any objects within
15 cm of the front and rear panels of the amplifier.
Outlet vent ~ Rear
~ 15 cm min.
JRL-2000F
J l
lntake vent 1t Front
~ 15 cm min.
• Use a sturdy table or plattarm that can easily support the weight of the JRL-2000F
(approximately 28 kg).
3.2 Power Supply Requirements
-4·
The JRL-2000F consumes approximately 12A of electrical current at an output power of 1000
W when power
is supplied at 220 VAC. This must be taken into consideration, along with
the consumption of the exciter, accessories and other home appliances, when choosing
an
AC line of sufficient capacity.
For full 1 kW outputpower a 200--240 VAC line must be used. lf a 100--120 VAC line is used,
the maximum rated
RF output power is 750W.
lf the power outlet has a ground terminal, be sure that the black wire is connected to ground.
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BEFORE USING THE JRL-2000F 3
3.3 Exciters
Any HF-band transmitter or transceiver with a 50Q RF output impedance can be used as
an exciter for the JRL-2000F. When used with the Japan Radio Co. JST-135 HF transceiver,
additional control features can
be utilized to enhance automatic band changing and tuning.
lf the maximum output of
the exciter exceeds 100W, the over-current protection circuit in the
power supply unit may be activated and the output waveform may be distorted. Therefore,
it is necessary to connect an external ALC signal in order to control the exciter output.
3.4 Antennas
lt is recommended that you select antenna(s) that meet the following criteria:
• Antenna impedance
is 50n.
•
When using a beam or vertical antenna equipped with trap coils or balun transformers,
be sure that they are capable of handling at least 1.5 kW PEP input.
• Use a coaxial cable with sufficient current capacity for all antenna Connections.
• lf the antenna
VSWR value is too high the antenna wave radiation factor drops. Also, in
case of a mismatch of the coaxial cable and antenna, undesired RF radiation may occur,
possibly causing radio interference. Therefore, special care must be taken
in order to avoid
these problems.
3.5 Grounding
To prevent electric shock and interference with other devices, connect your JRL-2000F and
all other radio devices
to a proper external grounding system. Use the heaviest possible copper
wire, braid
or strap and follow the shortest possible route. Do not use any gas pipe, water
pipe or cable duct
as a ground.
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4 CONNECTION
-6·
Before connecting the JRL-2000F to an exciter, turn oft the power of each radio device and
unplug all power cords from the outlets.
Different methods of connection are used for different types of exciters. lnterfacing the exciter
to the JRL-2000F
is accomplished by connecting various types of signal lines to the control
connector
as weil as connecting the coaxial cable and grounding cable.
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CONNECTION 4
4.1 Connection to a JST-135 Transceiver
ö
0
To connect you JRL-2000F to a JST-135 transceiver, the optional CFQ-3890 Control Gable
can be used. You may also construct your own custom control cable according to the wiring
diagram shown
in section 4.1.2 of this manual.
4.1.1 Connection diagram
The following diagram illustrates the proper connection of control cable, antennas, and
ground cable
when the JRL-2000F is used with a JST-135 Transceiver.
Coaxial cable
lä<>
I#\;
~
Antenna
(Up
to 4 antennas are connected.)
wwww
I [~ ~ ~ ~I ~·~ ~,0~
··~ -· AAU AAU AA>o 0 T
@ I~A ISA
@ 0 0 :·_r-~ ~
I
~~··- -
gog . @\·w--·=19> ~ §o ©J @@@@
! "'"'""' '"""'' * '" ''""·""'"'·
I
®' """0
a:oa
4J
II
Key
'
LJ
-c=J
Control cable
CFQ-3889
or that manufactured by user
JST-1350 rear panel
lmportant
Grounding cable
II/
Grounding
0
·=-~·
Cl«l~·
~ 0~0
LP
85-264V AC
50/60Hz
The same type of connector is used for both the LINEAR AMP terminal and ANT
TUNER terminal on the rear panel of the JST-135. Be very cafeful to connect
the JRL-2000F's control cable to the
LINEAR AMP terminal to avoid serious
malfunctions.
·7-
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] 4 CONNECTION
4.1.2 Control cable wiring diagram
lf you choose to construct your own custom control cable instead of. using the optional
CFQ-3890 Control Gable, please follow the following wiring diagram.
JRL-2000F JST-1350
E
TX D
TX R
TX MUTE
ALC
1f[
E
TX
E
MIC MUTE
SELBK
TX 13.8V
E
13.8 V
E
-
1~
2~
3~
4""
5_
6_
.,_
a_
g_
10-
11-
12~
13~
14-
15-
....___
-
~ ~
0 1
2
I I I I
~
I I I I
.......
.. _. .._
3
~
4
-
,- ...
,- ..
5
LINEAR AMP
~"
~..;:
~
~
6
~ ~
~
.,
·~ ..
·~ ..
~
8
~
9
....___
~
,- .. ,- ..
~ 13
I I I I
I I I I
:ar :ar
~
3
'V 5
I
010
ACCESSARY
~14
"U 15
1..------
lf the JST-135's ACCESSORY terminal can not be used (for example, if it is already
used for another application), it
is not neccessary to connect to this terminal. However,
in this case the following should be noted:
• Automatie antenna tuning can not be implemented unless the mode
is set to CW
and keyed down; and,
•
The JRL-2000F can not sense when the JST-135's power switch is turned on and
off, so the amplifier's power supply must be switched
on and off manually via front
panel switch or NCH-365
Remote Control Unit.
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CONNECTION 4
4.2 Connection to a Non-JRC Exciter
LP'
l
Key
You may prepare your own special control cable by using the 15-pin connector included with
your JRL-2000F (cable and connectors for exciter end not supplied). Alternatively, you may
purchase the optional CFQ-3889 Control Cable, which
is 3m long and is equipped with the
proper 15-pin connector for the JRL-2000F; you must supply all other connectors required
for connection to your exciter.
4.2.1 Connection diagram
The following diagram illustrates the proper connection of control cable, antennas, and
ground cable when the JRL-2000F
is used with a non-JRC exciter.
Antenna
(Up
to 4 antennas are connected.)
\17\V'WW
Coaxial cable
Ir Ii i i il -~ ~'o~
,,~ ~•~n~n~ns T
"""C:.I
@ I&A l&.o.
., ., * -:I-®®
a:oa
--·
® li~l ~ *~*
Control cable
L::J
U--J
CF0-3889 or that manufactured by user
Grounding cable
Exciter rear panel \II
Grounding
85-264V AC
50/60Hz
·9-
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] 4 CONNECTION
4.2.2 Control cable wiring Ddiagram
The following shows the pin configuration of the JRL-2000F's 15-pin control connector.
8 1
~
L
\i • • • • • • 4 I
f • • • • • '
I \
15
9
The pin numbers shown above correspond to the solder-side of the connector.
Pin number Name Oescription
1 E Connect to the ground cable.
2
TXO Oo not connect (used only for the JST-1350).
3
RXO Oo not connect (used only for the JST-1350).
4
TX MUTE
Oo not connect (used only for the JST-1350).
5 ALC Connect to the ALC terminal of the exciter; shielded wire should
be used if possible. When the connection is completed. refer to
"6.6 Adjusting the ALC Level".
6
RL
When a linear amplifier is used and if there is an exciter terminal
for the ground cable, then connect. lf there
is no ground
terminal,
do not connect.
7 E Connect to the ground cable.
8
TX
lf a signal which becomes earth-grounding Ievei at the time of
Iransmission
is outpul at the exciter terminal. connect. Refer to
"Connection of
KEY signalline" for details.
9 E Connect to ground cable.
10 MIC
MUTE
Oo not connect (used only for the JST-1350).
11
SELBK lf there is a terminal among the exciter terminals that
is switched
to Iransmission when connected to the ground cable. connect.
Also, when applying CW, connect to the
KEY. Refer to
"Connection of forced Iransmission signalline" for details.
12
TX 13.8 V lf any signal that becomes
12- 15V OC in Iransmission is
outpul at the exciter terminal, connect. Refer to "Connection of
KEY signal line" for details.
13 E Connect to ground cable.
14 13.8 V lf a signal !hat
is 12- 15V OC, 0.1 A or more, and which is
interlocked with the exciter ON/OFF is output, connect. Refer to
"Connection of automatic power ON/OFF signalline" for details.
15
E Connect to ground cable.
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JRL-2000F
ALC
RL
E
TX
E
SELBK
TX13.8 V
E
13.8 V
E
CONNECTION 4
When constructing a custom control cable to connect the JRL-2000F to a non-JRC
exciter, please follow
the following wiring charts.
,---L-
CONTROL connector
1Q
Regular exciter
2Q
.--------- .. --------- ... --
3Q
.
.
.
4Q
-· .
5
6
7
8
12.
13
~ JConnection to the ALC terminal
: Connect if there
is a terminal which should be connected to
).4--1----------..;.... the ground cable when a linear amplifier is used.
~ JConnect to Iransmission I reception
).4--1-----------w change-over signal terminal
(if grounded during transmission).
l-Jl------------+- Connect if there is a terminal which is
set to Iransmission when connected to the ground cable.
EB JConnect to a Iransmission I reception change-over
).4-----------+-8 signalterminal
(when + 12 -
15 V during transmission).
14
15
EB JConnect if there is a terminal !hat is +12 - 15 V,
1
15
011------------8 0.1 A or more and which is interlocked with the
l___,=.....l : exciter ON/OFF.
Connection of KEY signal line (Pins 8 and 12)
A KEY signal places the linear amplifier into Iransmission mode when the exciter is
switched from receive to transmit Unless the KEY signal line is connected, the linear
amplifier will not operate.
The output method for the KEY signal, which indicates the
exciters transmit/receive status, differes between the various exciter models.
The
operation or technical manual for the exciter should be studied to determine which
of the following methods
is used:
•
With many exciters the KEY signal becomes grounded during transmission. Connect
this signal line
to pin 8 (TX) of the JRL-2000F's control connector. There is a current
of approximately 5 mA. When 'the exciter is in the receive mode, make sure no
voltage exceeding 12 V is applied. lf pin 8 is connected, do not connect any line
to pin 12.
• lf a signal of 12 to 15 V DC (H Ievei) is output from the exciter during transmission,
connect the line to pin 12 of the JRL-2000F's control connector. A current of
approximately 5
mA is applied. lf pin 12 is connected, do not connect any line
to pin 8.
111-
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] 4 CONNECTION
LOW: Iransmission
HIGH: reception
JRL-2000F Interna! Circuit diagram (CDJ-1143)
lmportant
Note that automatic tuning will not be possible unless the KEY signal line from
the exciter
is connected.
Connection of forced Iransmission signal line (Pin 11)
When this signal line is connected, the exciter will automatically enter the transmission
mode when the JRL-2000F
is performing its automatic tuning and SET operations.
Basic operation
is not affected if pin 11 is not connected. However, smooth operation
is possible by connecting this pin. The forced transmission signal is at grounded Ievei
when the JRL-2000F issues a request for
an RF signal. When there is no request,
it
is in the open state.
lf there
is a terminal on the exciter that switches the exciter to transmit when grounded,
connect that terminal to pin
11. lf not, connect pin 11 to the exciter's PTI terminal.
lf
CW is used, connect pin 11 to the exciter's KEY line as weil unless negative voltage
is applied to the KEY, for example in an exciter that uses vacuum tubes in the final
stage. lf negative voltage
is applied, do not connect pin 11.
Key input
e Exciter
Open connector outpul
JRL-2000F
Voltage resistance: 15 V
Electric current: 50 mA
maJ
CD1: This may be required depending on the exciter.
Usually, connect directly.
(General Purpose Diode;
181588, etc.)
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Juter
max.
CONNECTION 4
lmportant
Verify that negative voltage is not applied when connecting the forced transmission
signal
line to KEY. Never connect pin 11 when there is negative voltage applied.
Take special care if using an exciter with vacuum tube finals.
Connection of automatic power supply ON/OFF signal line
{Pin 14)
The JRL -2000F power supply can be controlled by connecting 12-15 VDC (0.1 A max)
to pin 14 of the JRL-2000F's control connector.
85-264 V AC : . • I I
I
To the power supply unit
'-POWER SUPPLY CONT. switch at the rear panel
113-
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] 5
OPERATING CONTROLS AND FUNCTIONS
5.1 Front Panel Controls METER
1: lndieates the outpul
~----1 power (Po) or antenna VSWR,
seleetable with METER switehes.
POWER switeh: Turns main power
on and oft. When power is on, the
LED is lit. When oft, the antenna
switeh remains enabled,
but
antenna tuning and power amplifier
operations are disabled. (See
seetion 6.2)
PA switeh: Turns the DC power
supply for the power amplilier on
and oft. When the power amplilier is
enabled, the LED is lit. II the LED is
oft while the POWER switeh is lit, the
antenna tuner and antenna switeh
lunetions is operational, while the
power amplilier is disabled. (See
seetion 6.2)
liii 1
~ !..JRCI
,-::
METER switches (5):
Seleets the funetion of
METER 1 (Po or VSWR)
and METER 2 (lo,
Vo or
ALC).
SET switeh: Sets the
operating parameters
aeeording to data stored
in
memory to the eurrent
exeiter frequeney. During
SET Operation. the LED is
lit. (See seetion 6.4)
REMOTE CONTROL SENSOR:
---1 Deteets infrared signal from NCH-
365 Remote Control Unit.
CENTAAL DISPLAY:
~ Displays frequeney band
in MHz, as weil as other
messages. METER
2: lndieates DC
voltage (Vo), eurrent (lo) or
ALC Ievei, seleetable with
METER switehes.
rXMT indieator: Remains lit I
II dunng transmJSSIOn.
1~1
la~. ~ lr--~--=--:~~.----.::1-, :1_J___----I---f1-:, __j
JRL-2000F ~ II
MI' UNI.AA ~lii'IE" -
1-
1-
·-
,.;;. ,...-:: 1"'"17171
TUNE switch:
Automatieally tunes the
antenna and sets other
operating parameters
and stores the matehing
data to memory. The
LED is lit during tuning.
(See seetion 6.3)
ANTENNA switches:
Sei"ects one of four
antennas eonneeted to
the JRL-2000F. The
LED indieates the
seleeted antenna.
-C]
MATCH indieator:
lndieates the eondition of
the matehing seetion. lf
'- the light is green, proper
matehing is achieved; if
orange, the matehing is
poor.
'---
DRIVE indieator: lndicates
eondition of drive signal
from exeiter. II the light is
green, drive Ievei is OK; if
orange, the amplifier is
being overdriven
by the
exciter.
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OPERATING CONTROLS AND FUNCTIONS 5
5.2 Rear Panel Controls
INPUT connector: PL-259
type connector for input
signal from exciter.
ANT1-ANT4 connectors:
PL-259 connectors for
outpul signal from
JRL-
2000F to antenna(s).
CONTROL connector: The
interface control cable is
connected between this
connector and exciter.
ALCIADJ
ALC ADJ control: Used to
adjust the ALC Ievei. (See
section 6.6)
INPUT ANTI ANT2 ANT3 ANH *
EXHAUST FANS: For the
PA unit and power supply
unit.
® 0 *
®
®
®
POWER SUPPLY CONT
switch: When set to ON
position, the JRL-2000F's
power supply
is controlled
by the front panel POWER
switch (and NCH-365
Renote Control Unit).
When set to EXTERNAL
position, the exciter can
be used to control the
power supply. (See
section 4.2.2)
I&A
GND terminal: For
connection to ground
system
FUSE: 15A fuse for AC
power line
115-
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] I 5 OPERATING CONTROLS AND FUNCTIONS
5.3 Remote Control Unit (NCH-365)
PowER switch: Turns main
power on and oft. (See
section 6.2)
PA switch: Turns the DC
power
supply for the power
amplifier on and oft. (See
section 6.2)
11-t-tl----1 TuNE switch: Automatically
SET switch: Sets the
operating parameters
according to data stored in
memory to the current
exciter frequency. (See
section 6.4)
METER switches: Selects the
function of meters 1 and 2
to indicate the
outpul power
(Po), antenna VSWR, DC
valtage (lo) and current
(Vo).
(..JRC)
Remoie Controller
NCH-365
tunes the antenna and sets
other operating parameters
and stores the matehing
data to memory. (See
section 6.3)
ANTENNA switches: Selects
one of four antennas
connected to the
JRL-
2000F. (See section 6.2)
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