Vertex Standard GX1500S User manual
FCC ID: K6630173X3D
IC ID: 511B-30173X3D
Alignment
1/5
Vertex Standard Co,. Ltd.
GX1500S Alignment
The GX1500S has been carefully aligned at the factory for the specified performance
across the marine band.
Realignment should therefore not be necessary except in the event of a component
failure. All component replacement and service should be performed only by an authorized
Standard Horizon representative, or the warranty policy may be voided.
The following procedures cover the sometimes critical and tedious adjustments that are
not normally required once the transceiver has left the factory. However, if damage occurs
and some parts are replaced, realignment may be required. If a sudden problem occurs
during normal operation, it is likely due to component failure; realignment should not be
done until after the faulty component has been replaced.
We recommend that servicing be performed only by authorized Standard Horizon
service technicians who are experienced with the circuitry and fully equipped for repair and
alignment. Therefore, if a fault is suspected, contact the dealer from whom the transceiver
was purchased for instructions regarding repair. Authorized Standard Horizon service
technicians realign all circuits and make complete performance checks to ensure
compliance with factory specifications after replacing any faulty components.
Those who do undertake any of the following alignments are cautioned to proceed at
their own risk. Problems caused by unauthorized attempts at realignment are not covered
by the warranty policy. Also, Standard Horizon, a division of VERTEX STANDARD, must
reserve the right to change circuits and alignment procedures in the interest of improved
performance, without notifying owners. Under no circumstances should any alignment be
attempted unless the normal function and operation of the transceiver are clearly
understood, the cause of the malfunction has been clearly pinpointed and any faulty
components replaced, and the need for realignment determined to be absolutely necessary.
The following test equipment (and thorough familiarity with its correct use) is necessary
for complete realignment. Correction of problems caused by misalignment resulting from
use of improper test equipment is not covered under the warranty policy. While most steps
do not require all of the equipment listed, the interactions of some adjustments may require
that more complex adjustments be performed afterwards. Do not attempt to perform only a
single step unless it is clearly isolated electrically from all other steps. Have all test
equipment ready before beginning, and follow all of the steps in a section in the order
presented.
FCC ID: K6630173X3D
IC ID: 511B-30173X3D
Alignment
2/5
Vertex Standard Co,. Ltd.
Required Test Equipment
RF Signal Generator with calibrated output level at 200 MHz
Deviation Meter (linear detector)
AF Millivoltmeter
SINAD Meter
Inline Wattmeter with 5% accuracy at 200 MHz
Regulated DC Power Supply: 13.8 VDC, 10A
50-ohm Non-reactive Dummy Load: 30W at 200 MHz
Frequency Counter: >0.1 ppm accuracy at 200 MHz
AF Signal Generator
DC Voltmeter: high impedance
VHF Sampling Coupler
AF Dummy Load: 4 Ohms, 10 W
Oscilloscope
Spectrum Analyzer
GX3500S Marine Transceiver
Alignment Preparation & Precautions
A dummy load and inline wattmeter must be connected to the main antenna jack in all
procedures that call for transmission. Correct alignment is not possible with an antenna.
After completing one step, read the following step to determine whether the same test
equipment will be required. If not, remove the test equipment (except dummy load and
wattmeter, if connected) before proceeding.
Correct alignment requires that the ambient temperature be the same as that of the
transceiver and test equipment, and that this temperature be held constant between 20°C
and 30°C (68°F and 86°F). When the transceiver is brought into the shop from hot or cold
air it should be allowed some time for thermal equalization with the environment before
alignment. If possible, alignments should be made with oscillator shields and circuit boards
firmly affixed in place. Also, the test equipment must be thoroughly warmed up before
beginning.
Note: Signal levels in dB referred to in this procedure are based on 0 dBµ = 0.5 µV (closed
circuit).
Overview of Test Mode
The test mode has been build in the microprocessor in order to adjust and confirm the
performance of transceiver.
The purpose is to adjust transceiver simply and to confirm the performance of
transceiver smoothly.
FCC ID: K6630173X3D
IC ID: 511B-30173X3D
Alignment
3/5
Vertex Standard Co,. Ltd.
(A) In CH70, every time you are in transmit mode, (every time you press PTT), the
following test tone can be outputted:
1st transmission: 1300 Hz
2nd transmission: 2100 Hz
3rd transmission: No modulation
4th transmission: Synthetic tone of 1300 Hz and 2100 Hz
5th transmission: Return to 1st transmission
(B) Scan the channels between WX10 and EXP04 in the SCAN mode.
Starting Test Mode
Confirm that PWR/VOL switch is off, and short the TEST points(JP1001). Turn on the
PWR/VOL switch while press and holding the DIST and DW keys.
Adjustment of VCO
Connect the DC voltmeter to the test point (LOCK TP).
Use the 16/9 key to set the channel to CH16, adjust TC1002 so that voltage on the
TP1010 is 1.5 V ±0.1 V in the receive and transmit mode.
Use the 16/9 key to set the channel to CH16, adjust TC1001 so that voltage on the
TP1007 is below 3.0 V ±0.1 V in the transmit mode.
Adjustment of Transmit Power
Adjust power at high and low in the transmit mode, and confirm power in the specified
bandwidth.
Connect the wattmeter and 50-ohm dummy load to the antenna jack.
Use the H/L key to set transceiver to high power and set the channel to CH16. With
the PTT switch pressed, adjust VR1001 so that RF power is 25 W.
Use the H/L key to set transceiver to low power and set the channel to CH16. With
the PTT switch pressed, adjust VR1002 so that RF power is 0.8 W.
Adjustment of PLL Frequency
Adjust the frequency in the transmit mode and local frequency in the receive mode.
Setup the test equipment as shown below.
Set the channel to CH16. With the PTT switch pressed, adjust TC1003 so that RF
frequency is 156.80000 MHz ± 100 Hz.
Adjustment of Deviation
Adjust deviation in the transmit mode.
Setup the test equipment as shown below.
Set the channel to CH16.
Set the output of the audio generator (AG) to 1 kHz and 100 mV.
FCC ID: K6630173X3D
IC ID: 511B-30173X3D
Alignment
4/5
Vertex Standard Co,. Ltd.
With the PTT switch pressed, adjust VR1003 so that the maximum deviation is ±4.4
kHz.
Set the output of the audio generator (AG) to 100 Hz and 1 V.
With the PTT switch pressed, adjust VR1004 so that the maximum deviation is ±4.4
kHz.
Adjustment of Receiver Front-end
Adjust the receiver front-end coil.
Setup the test equipment as shown below.
Set the center frequency of the spectrum analyzer to 159.00 MHz, set SPAN to 20.00
MHz, set RBW and VBW to 30 KHz, and set SWP to 56 ms.
Adjust L1010, L1013, L1027, L1028, and L1031 until the wave form shown in below is
obtained.
Note: Adjust the output of the tracking generator so that RF AMP and spectrum analyzer
will not saturate.
Figure shows the reference wave form. The wave form varies with measuring instruments.
It is impotent to take the lowest possible value at the stop band near 150 MHz and the
highest possible value at the band near 156 MHz.
Each coil shall be adjusted at the range between the initial condition and right and left
revolving.
GX1255S-FRONT-END
ATTEN 20dB
RL 10.0dBm 10dB/
CENTER 159.00 MHz
*RBW 30 kH
z
VBW 30 kHz
SPAN 20.00 MHz
SWP 56.0 ms
FCC ID: K6630173X3D
IC ID: 511B-30173X3D
Alignment
5/5
Vertex Standard Co,. Ltd.
Confirmation of Weather Alert Tone
In the weather channel mode, when transceiver receives the specific emergency tone
(1050 Hz), weather alert tone will be output (Weather Alert Operation). The Weather Alert
mode will be active when a NOAA weather channel is in memory and radio is in memory
scan or P-scan mode.
Connect the standard signal generator (SSG) to the antenna jack.
Squelch position set to tight.
Press the SCAN key and start to Memory Scan mode.
Set the SSG to 163.275 MHz (WX10) and output level of the SSG to 20 dBµV, ±3.0
kHz deviation with 1050 Hz tone modulation.
Set the output of the SSG to ON.
Confirm that the channel of transceiver stops at WX10 and the transceiver outputs the
weather alert tone (1050 Hz).
Confirmation of receiver NMEA data
Input NMEA format data output from GPS receiver to NMEA terminal A of transceiver and
display it to the LCD of the transceiver.
NMEA format data output from GPS receiver is applied to NMEA terminal of transceiver’s
option connector and LCD of transceiver will show data.
Setup the test equipment as shown below.
Press and hold the H/L key, confirm that the position data is displayed on the LCD of
transceiver.
Confirmation of DSC Operation
Prepare the confirmation transceiver (GX3500S).
Input below data to the confirmation transceiver in advance.
- Input “TEST” to NAME of INDIVIDUAL DIRECTORY
- Input “123456789” to MMSI of INDIVIDUAL DIRECTORY
- Input “123456780” to local MMSI
- Channel 13 in U.S.A. mode
Setup the test transceiver as follows:
- Channel 21 in U.S.A.
In 3 seconds, send the INDIVIDUAL CALL from the confirmation transceiver.
Confirm that the test transceiver receives the INDIVIDUAL CALL from the confirmation
transceiver and outputs the beep.
Press the CALL/SET key of the test transceiver and turn off the beep.
Simultaneously, confirm that “123456780” of confirmation transceiver’s MMSI is
displayed in the LCD of the test transceiver.
Confirm that the confirmation transceiver receives the response from the test
transceiver and outputs beep.
Press the CALL/SET key of the confirmation transceiver and turn off the beep.
Simultaneously, confirm that “TEST” of test transceiver’s MMSI is displayed in the LCD
of the confirmation transceiver.
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