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JUMA TRX-2, Руководство по эксплуатации

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JUMA TRX-2 Скачать руководство пользователя страница 43

= 1679

This has to be squared:

2,819,041

the calibration factor to read 10W is therefore:

3547

The incremental quantisation step is thus 2.8mW, which is a greater precision than actually
required, nevertheless, the accuracy of the measurement is now largely determined by the
sensor, and not the A-D convertor or its calibration factor.

43

Содержание TRX-2

Страница 1: ...dy performed the various hardware setup adjustments covering receiver AGC threshold setting optimisation of sideband suppression transmitter final amplifier bias current adjustments amplifier gain com...

Страница 2: ...ower button is pressed and held whilst powering up the system setup menu will be selected The various operations and settings are fully covered in the System Setup section of this document To exit the...

Страница 3: ...y you will be presented with the User Configuration menu This is more fully covered in the User Configuration section To exit from this menu press and hold the button until a long beep is heard then r...

Страница 4: ...estored without the necessity of using the System Setup facility With the transceiver off press and hold the MODE button and briefly press the power button Wait until the screen displays the message a...

Страница 5: ...plit mode of operation and if the transmitter is keyed either with the PTT switch or a key It is also inoperative in the Service and User Configuration modes To save a favourite amateur band frequency...

Страница 6: ...r bandwidths but also has a secondary function of storing user frequencies A brief press of the button will cycle you through the Wide Medium and Narrow filter bandwidths The actual bandwidths employe...

Страница 7: ...eference Oscillator Frequency Default 180000000Hz The DDS is fed with the output of the precision crystal oscillator and in the current models is a packaged component with an output frequency of nomin...

Страница 8: ...ps are now such that it should be possible to set the voltmeter to exactly match your measured value The range is checked and values from 4000 6000 are acceptable although values significantly differe...

Страница 9: ...from 1 000 7 000 Beep Time Default 50mS This adjustment determines the time of all the audio annunciator signals Adjust the value to your preference The range is checked and values from 0 100mS are al...

Страница 10: ...hat with the logic and backlighting current as well this is running very close to the fuse rating Overvoltage Trip Default ON This allows you to enable or disable this alarm If the alarm is disabled t...

Страница 11: ...e are now 21 settings that can be adjusted to your preferences With this many configurable settings there is now an additional feature allowing you to rapidly access any configuration page To use this...

Страница 12: ...er that to satisfactorily use digital modes the speech processor must be turned off and the transceiver s microphone amplifier circuit slightly modified to completely disable the speech processor in t...

Страница 13: ...sed to verify the integrity of the transceiver s internal circuitry and software as well as check that the serial communications port is working correctly In this version of the firmware several seria...

Страница 14: ...eter Original or a numeric S Meter The gain characteristics of a correctly adjusted and calibrated receiver are almost exactly logarithmic over the dynamic range of the receiver which lends itself to...

Страница 15: ...d Bandswitch Feature It does not affect tuning when using the tuning knob Even with auto sideband selected you may still choose any operating mode on any band Frequency Display Selection Default Fixed...

Страница 16: ...been improved See Annex A for a full explanation Fixed A The display is fixed at 1Hz resolution independent of the tuning rate used For frequencies below 1MHz the decimal point will move to the kHz po...

Страница 17: ...tion The upper and lower frequencies to be used as the band edges are determined by the setting of the Band Limits parameter in a following menu The out of band indication is dependent upon the mode i...

Страница 18: ...s the display blanks you can release the button holding it down will no longer cause a power up to occur 4 Various audio glitches when changing frequencies or modes have been eliminated or greatly sup...

Страница 19: ...2 0MHz and 4 0MHz frequencies these filters would be changed The new frequencies are 2 010MHz and 4 010MHz 9 The Serial Test facility has been enhanced with the addition of a dump of the attenuator s...

Страница 20: ...The reason for this anomaly is not hard to find The output frequency of the synthesiser is local oscillator f N 180000000 2 33 Hz Where N is the 32 bit binary word used to load the DDS chip In fact th...

Страница 21: ...cimal frequency being converted only once to its DDS equivalent word the worst error that can occur is a 1 bit quantisation error leading to a worst case resolution error of 0 04Hz allowing for roundi...

Страница 22: ...nly within 1ppm This is a fairly stringent specification to meet and the average frequency counter from for example eBay is unlikely to meet this It really requires access to a laboratory grade counte...

Страница 23: ...quency to be higher or lower than this Subtract the 1 000Hz from the averaged result Since the standard frequency in this example is 5MHz to find the error at 30MHz multiply the error by 30 5 and this...

Страница 24: ...receiver to a display setting of 10 001000MHz LSB Measured Beat Frequency 1250 1251 1251 1250 1249 1250 1251 1250 1250 1251 Averaging these results gives a beat frequency of 1250 00Hz Error 1250 00 10...

Страница 25: ...88 Lock VFO 00 Unlock VFO 80 Command Format The commands take the form of a 5 byte string terminating with the command byte The leading 4 bytes are the parameter values required If a command does not...

Страница 26: ...SWR 0 OFF 1 ON 5 Split Mode 0 ON 1 OFF 4 Dummy Data 0 3 PWR Meter Bit 3 2 PWR Meter Bit 2 1 PWR Meter Bit 1 0 PWR Meter Bit 0 The PWR meter value is coded into 15 levels from 0 100W Split Mode ON Com...

Страница 27: ...PTT OFF Receive Command To Transceiver 00 00 00 00 88 Lock VFO Command To Transceiver 00 00 00 00 00 Unlock VFO Command To Transceiver 00 00 00 00 80 27...

Страница 28: ...et Read RIT Function RT Set Read DSP Low Frequency SL Set Read DSP High Frequency SH Read S Meter Status SM Set Read Squelch Level SQ Not implemented Turn TX ON TX Turn RX ON RX Read Transceiver Statu...

Страница 29: ...elect Fine Tune 1Hz Transmitted from PC FS0 Fine Tune function OFF Select 10Hz tuning rate FS1 Fine Tune function ON Select 1Hz tuning rate Read Fine Tune Transmitted from PC FS Response from TS 480 F...

Страница 30: ...p9 1 LSB 2 USB 3 CW p10 0 VFO A 1 VFO B p11 0 Scan Off p12 0 Simplex 1 Split p13 0 Not Applicable p14 00 Not Applicable p15 space character End Of Command character Example 1 IF00014003920 00000000000...

Страница 31: ...Transmitted from PC NB Response from TS 480 NB0 Noise Blanker OFF NB1 Noise Blanker ON Set Speech Processor Transmitted from PC PR0 Speech Processor OFF PR1 Speech processor ON Read Speech Processor...

Страница 32: ...9 3400 10 4000 11 5000 all frequencies in Hz At present the emulation examines the transmitted request and selects the wide mid or narrow filter that matches as close as possible Read High Frequency D...

Страница 33: ...onse from TS 480 RX0 No response from TS 2000 If TS 2000 is already in RX mode response is Read Transceiver Status Transmitted from PC RS Response from TS 480 RS0 Normal RS1 Busy Split Mode To enable...

Страница 34: ...lay SPI bus control bits m Display mSec counter o Reference Oscillator calibration value p Display scaled S Meter CW Speed Pot A D value R RF Attenuator Settings S Start SCAF Audio On s Stop SCAF Audi...

Страница 35: ...0 Hz DC Voltmeter 5300 Ammeter 2400 Power Meter 3550 S Meter 1920 SWR Trip Setting 300 Over Voltage Trip 2736 14 50V Under Voltage Trip 2076 11 00V Over Current Trip 2084 2 50A Beep Time 50 mS User Se...

Страница 36: ...ode CW Speed LCD Backlight 350 LCD Contrast 2000 LCD Timer 0 RS 232 Mode Test Speed 9600 Baud VFO Memory A B Split S Meter Graphic TX Disable ON Auto Sideband ON Frequency Display Fixed B 12 34568 Ban...

Страница 37: ...ency power down mode as soon as you see the prompt release the PWR button Note that no user settings are saved the transceiver will simply drop the power latch line and shut down Entering the letter U...

Страница 38: ...0E0 0001 0001 0001 0001 0000 0000 0000 0001 00F0 0001 0001 0001 0001 0001 0001 0000 0000 0100 0000 0000 0002 07D0 015E 0000 004B 0022 0110 001E 001D 0002 0001 0001 0000 0003 0000 0120 0001 0001 0003 0...

Страница 39: ...enhance the accuracy of the measurement sub system with little impact on speed Voltage Measurement The voltage measurement system uses a precision potential divider comprising resistors R27 33k 1 and...

Страница 40: ...accuracy of the measurement system being 5 25mV If the measurement system s calibration factor and calculation is changed the overall accuracy and resolution can be significantly improved The new cal...

Страница 41: ...n would be display V ADC 5249 10 000 000 Inserting typical values Raw O P 2629 5249 13 799 621 Now however if the calibration factor is changed by 1 increment the display would be Raw O P 2629 5250 13...

Страница 42: ...he ammeter In order to take advantage of this resolution at a nominal input current of 2 5A the required calibration adjustment factor would be 2220 Thus the actual current calculation would be displa...

Страница 43: ...ead 10W is therefore 3547 The incremental quantisation step is thus 2 8mW which is a greater precision than actually required nevertheless the accuracy of the measurement is now largely determined by...

Страница 44: ...to the EEPROM Over Current This alarm is triggered if the measured final amplifier s drain current exceeds the preset threshold Note that as already mentioned the current sense only applies to the pow...

Страница 45: ...ese voltages it must be placed on charge immediately afterwards or within as short a period of time as possible Do not leave a sealed lead acid battery in a discharged state at low voltages a secondar...

Страница 46: ...en change and will appear as below To select an attenuator rotate the VFO knob and you can select one of four attenuation levels from 0dB to 3dB in 1dB steps To equalise the output power you will need...

Страница 47: ...gs as well as inserting the measurement system s calibration values you will have to re select the various attenuation settings for each band It was whilst making these adjustments that I discovered t...

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